The Cosel SUCW32415C is a high-efficiency, isolated DC-DC converter designed for industrial, medical, and telecom applications. It operates from a 18-36VDC input, delivering a regulated 15VDC output with ±5% adjustability via the TRM pin. Featuring soft-switching technology, it achieves up to 90% efficiency while minimizing EMI. The converter includes overcurrent, short-circuit, and thermal protection, ensuring reliable operation. With 2250VAC input-output isolation and remote ON/OFF control, it meets UL 60950-1 and EN 62368-1 safety standards. Its compact SIP/DIP package (25.4×12.7×10.2mm) and high MTBF (>1M hours) make it ideal for space-constrained, high-reliability systems.
Cosel SUCW32415C's Features
The Cosel SUCW32415C is a PCB-mounted DC-DC converter with various features covering multiple aspects such as input and output, protection, control, operation, cleaning, safety standards, etc. The details are as follows:
Input Characteristics
Voltage Range: It is necessary to ensure that the input voltage fluctuation and ripple voltage do not exceed the specified values. If a non-regulated power supply is used for input, it should be carefully checked. When in use, the input power supply should be selected by fully considering the inrush current (Ip). Ip is affected by the input voltage slope, load factor, and external capacitance. For detailed information, please contact the manufacturer.
Reverse Polarity Protection: Connecting a reverse-polarity voltage to the input pins will cause a power supply failure. A protection circuit combining an external Schottky barrier diode or a Schottky barrier diode and a fuse can be used.
Output Characteristics
Voltage Regulation: The output voltage can be adjusted within the range of ±5% of the rated voltage through an external potentiometer. When adjusting, rotate the potentiometer clockwise to increase the output voltage (making the resistance value between pins 2 and 3 smaller), and rotate it counterclockwise to decrease the output voltage; for dual-output models, the ± voltages can be adjusted simultaneously. When not adjusting, the TRM pin should be opened. The wires connecting the potentiometer should be short and connected from the pins on the power supply side. Metal film resistors with a specific temperature coefficient (temperature coefficient ±100ppm/°C or lower) and ceramic potentiometers (temperature coefficient ±300ppm/°C or lower) should be used.
Filter Capacitor: Generally, no external capacitor is required. If it is necessary to reduce the output ripple noise, an electrolytic capacitor or a ceramic capacitor can be connected to the output pins (the capacitance of the ceramic capacitor should be maintained at 0.1 - 10μF), and the recommended capacitance value depends on the model and output voltage. When the output is far from the load and noise is generated on the load side, an external capacitor can be connected at the load end.
Protection Functions
Overcurrent Protection: An overcurrent protection circuit is built-in. It will be activated when the current exceeds 105% of the rated current, and it can prevent short circuits and overcurrents within 20 seconds. It will automatically recover after the fault is eliminated. For models with foldback current characteristics, they may not be able to start when connected to non-linear loads (such as lamps, motors) or constant current loads.
Isolation Protection: When conducting a high-voltage test, the voltage should be increased and decreased slowly, and a high-voltage tester with a timer should not be used. When used in an environment where there is a constant voltage between the unit's input and output, please contact the manufacturer.
Control Function: It supports the remote ON/OFF function (except for the 1R5 model). For SU/SUC3/SUT3 and SU/SUC6/SUT6, when the RC pin is connected to -Vin, the power output is turned on. When the voltage of the RC pin is between 2.0 - 9.0V, the output is turned off, and when it is between 0.3 - 2.0V, the output voltage is uncertain and lower than the rated voltage; for SU/SUC10/SUT10, when the RC pin is connected to -Vin, the power output is turned on. When the RC pin is open or the voltage is between 2.4 - 7.0V, the output is turned off, and when it is between 1.2 - 2.4V, the output voltage is uncertain. When not using this function, the RC and -Vin pins need to be shorted.
Operation Modes
Series Operation: Series operation can be carried out through a specific wiring method. The output current should be lower than the rated current of the power supply with the lowest rated current among the series power supplies to ensure that no current exceeding the rated value flows into the power supply.
Redundant Operation: Redundant operation can be performed, but it should be noted that the slight differences in output voltage will affect the current balance, and it is necessary to ensure that the total current I3 does not exceed the rated current of the power supply.
Cleaning Requirements: It can be cleaned by immersion, ultrasonic, or steam cleaning. The cleaning agent is IPA (solvent type). The total cleaning time should not exceed 2 minutes, and it should be fully dried after cleaning. When using ultrasonic cleaning, the ultrasonic output should be maintained at 15W or below (except for SUCOOC-C).
Safety Standards: When used as a component of a terminal device, there is functional isolation between the unit's input and output. Depending on the input voltage, basic insulation, double insulation, or reinforced insulation may be required, which specifically needs to be handled in the structure of the terminal device. When applying for safety standard certification, a specific model name should be used.
Temperature Characteristics: Under the condition of forced air cooling (1m/s), the temperature at the specific measurement points needs to be kept within the specified range, and at the same time, the ambient temperature should not exceed 85°C. For example, when SUC3 is under forced air cooling, it is necessary to ensure that the temperature at point C (the center of the housing) is 100°C or below.
Pulse Load Handling: When connecting a pulse load, an electrolytic capacitor can be externally connected to the output side to provide the pulse current. The average output current and the required capacitance of the electrolytic capacitor can be calculated through a specific formula.
Optional Characteristics: The "C" in the model indicates that (only for SUCOOC) the PCB and components are coated with a conformal coating, which is suitable for harsh environments with corrosive gases (such as H₂S). Compared with the standard version, the minimum clearance from the user's circuit board is 0.05mm, and there is no safety standard certification.
Packaging Information: The product is packaged on a tray. To obtain the tray packaging, "SUOOOOOBP" needs to be ordered. The tray capacity varies for different models. For example, the maximum for SU3 is 30 pieces/tray. When transporting and handling the tray, it should be kept horizontal and vibrations should be minimized.
Cosel SUCW32415C's Applications
The Cosel SUCW32415C is a DC-DC converter. With its numerous features, it has a wide range of applications in multiple fields:
Industrial Equipment Field
- Automated Production Lines: It can meet the power supply requirements of various sensors, controllers, and small drive motors in the production line. Its over-current protection function can promptly protect the circuit when abnormal current occurs in the equipment, prevent equipment damage, and ensure the stable operation of the production line. The wide input voltage range (DC18 - 36V) makes it adaptable to different power supply conditions in industrial sites.
- Industrial Instrumentation: It provides a stable power source for measurement and analysis equipment. In some detection instruments with high requirements for voltage accuracy, it can precisely adjust the output voltage within ±5% of the rated voltage through an external potentiometer, ensuring the accuracy of the instrument's measurement. Moreover, in complex industrial electromagnetic environments, the isolation characteristic between its input and output can effectively reduce electromagnetic interference and ensure the normal operation of the instrument.
Medical Equipment Field
It is suitable for medical electrical equipment, such as small portable medical monitoring devices (such as blood glucose meters, blood pressure monitors, etc.) and some low-power treatment devices. It complies with relevant safety standards (such as UL 60950 - 1, c - UL, en 62368 - 1), ensuring the safety of medical equipment during use. The feature of low-noise output will not interfere with the precise detection circuits of medical equipment, ensuring the reliability of the detected data.
Communication Equipment Field
It can be used to supply power to communication devices such as wireless modems. In communication base stations or terminal devices, the stable output voltage and current can ensure the normal operation of communication modules and maintain the stable transmission of signals. Its high conversion efficiency can reduce the energy consumption of equipment, meet the energy-saving requirements of communication devices, and extend the battery life of the equipment.
Consumer Electronics Field
It is commonly used to supply power to various consumer electronics devices, such as tablet computers, smart speakers, etc. It has two installation methods, surface mount device (SMD) and dual in-line package (DIP), which makes it convenient to install on the circuit boards of different electronic products. The design features of being lightweight, thin, and space-saving are in line with the requirements of miniaturization and lightweight for consumer electronics products.
Cosel SUCW32415C's Attributes
| Product Category |
Isolated DC/DC Converters - Through Hole |
RoHS |
Details |
| Mounting Style |
Through Hole |
Number of Outputs |
2 Output |
| Output Power |
3 W |
Input Voltage, Min |
18 V |
| Input Voltage, Max |
36 V |
Output Voltage-Channel 1 |
15 V |
| Output Current-Channel 1 |
100 mA |
Output Voltage-Channel 2 |
- 15 V |
| Output Current-Channel 2 |
100 mA |
Isolation Voltage |
500 V |
| Minimum Operating Temperature |
- 40 C |
Maximum Operating Temperature |
+ 85 C |
| Length |
25 mm |
Width |
16.1 mm |
| Height |
7 mm |
Industry |
Industrial |
| Product |
Isolated |
Series |
SU |
| Brand |
Cosel |
Cooling Method |
Convection, Air-Cooled |
| Dimensions |
25 mm x 7 mm x 16.1 mm |
Efficiency |
76 % |
| Input Voltage |
18 V to 36 V |
Mechanical Style |
Isolated |
| Product Type |
Isolated DC-DC Converters |
Factory Pack Quantity |
1 |
| Subcategory |
DC-DC Converter |
Unit Weight |
0.176370 oz |
Cosel SUCW32415C's Symbol, Footprint and 3D Model
Standard Pin Configuration (Single Output Model)
| Pin Number |
Symbol |
Function Description |
| 1 |
+Vin |
Positive Input Voltage (DC 18-36V) |
| 2 |
-Vin |
Negative Input Voltage (Ground) |
| 3 |
+Vout |
Positive Output Voltage (Fixed 15V) |
| 4 |
-Vout |
Negative Output Voltage (Ground) |
| 5 |
TRM |
Output Voltage Adjustment (Optional, leave floating if unused; external potentiometer allows ±5% fine-tuning) |
| 6 |
RC |
Remote Control (High to disable, Low to enable; must be shorted to -Vin if unused) |
Key Precautions:
- Voltage Adjustment (TRM Pin)
- Clockwise rotation of the potentiometer increases output voltage (requires 2.2kΩ-4.7kΩ resistor).
- Leave floating when not in use; improper connections may cause output instability.
- Remote Control (RC Pin)
- Logic High (>2.4V): Output OFF.
- Logic Low (<0.3V) or shorted to -Vin: Output ON.
- Floating state may cause instability; recommend pulling down to ground via 10kΩ resistor.
- Thermal Management
- Design large copper pours (≥100mm²) on PCB for input/output pins to aid heat dissipation.
- For high-power applications, maintain ambient temperature below 70°C or use forced air cooling.
- Protection Circuits
- Built-in overcurrent protection (foldback type) and short-circuit protection with auto-recovery.
- External Schottky diode required for reverse polarity protection.
Cosel SUCW32415C's Category- DC DC Converters
A DC-DC converter is an electronic device that can convert a direct current (DC) voltage into other DC voltages, and it can be regarded as the "magician of electrical energy" in modern electronic systems. Through technologies such as switching control, inductive energy storage, and capacitive filtering, it precisely regulates the output voltage and is widely used in various electronic devices ranging from smartphones to satellite systems. Its core advantage lies in its high-efficiency electrical energy conversion capability - the efficiency of most DC-DC converters can reach 80%-95%, which can significantly reduce energy consumption and extend battery life. In addition, it can also achieve various conversions such as step-up, step-down, and polarity reversal of the voltage to meet the diverse power supply requirements of different electronic components.
DC-DC converters are mainly divided into two categories: isolated type and non-isolated type. The isolated type achieves electrical isolation between the input and output through a transformer, which has higher safety and is often used in high-reliability scenarios such as medical equipment and industrial control. The non-isolated type has a more compact structure and lower cost, and is widely used in consumer electronics and communication equipment. In terms of working modes, it can be further divided into Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM). The PWM mode is more efficient under high loads, while the PFM mode performs well under light loads and can intelligently switch according to actual needs.
Take the Cosel SUCW32415C as an example. This PCB-mounted DC-DC converter perfectly embodies the essence of modern DC-DC technology. It supports a wide input voltage range of 18-36V, and the output voltage can be precisely adjusted within ±5% through an external potentiometer, providing a flexible power supply solution for complex electronic systems. Its built-in overcurrent protection circuit can respond quickly when the current is abnormal to ensure the safe operation of the equipment. The converter also supports remote ON/OFF control, series connection, and redundant operation modes, adapting to diverse application scenarios. Whether it is the precise control of industrial automation equipment or the stable power supply of medical instruments, the SUCW32415C can, with its efficient and reliable performance, become an ideal choice for electronic engineers to optimize power supply designs.
SUCW32415C's Manufacturer-Cosel
Since its inception in 1958, Cosel has established itself as a global leader in DC-DC converter technology, driving advancements that redefine efficiency, reliability, and miniaturization across industries. The company’s contributions span four core domains:
1. Technological Innovation
Cosel revolutionized power conversion with the introduction of soft-switching technology, reducing switching losses and achieving efficiencies up to 95%—a benchmark for modern converters. Its high-frequency resonant conversion architecture enables power densities exceeding 15W/cm³ (e.g., SUCW series), making it ideal for space-constrained applications. The development of ultra-thin transformers and optimized isolation circuitry delivers 2250VAC input-output isolation, ensuring safety in medical and industrial systems.
2. Safety and Compliance
Cosel’s commitment to safety is evident in its adherence to rigorous international standards, including UL 60601-1 (medical), UL 62368-1 (ITE), and EN 50155 (railway). Products undergo stringent testing, with an MTBF exceeding 1 million hours, ensuring reliability in critical environments. The company’s eco-friendly designs comply with RoHS and REACH regulations, reflecting its sustainability ethos.
3. Specialized Solutions
Cosel’s converters power diverse sectors:
- Medical: Low-noise, high-isolation units for MRI scanners and patient monitors.
- Industrial Automation: Ruggedized converters for PLCs and robotics.
- Communications: High-efficiency modules for 5G base stations and data centers.
- Renewable Energy: Converters optimized for solar inverters and energy storage.
4. Industry Leadership
Cosel actively contributes to standards development, collaborating with bodies like IEC and UL. Its dedication to R&D—investing over 8% of annual revenue—fuels continuous innovation. With manufacturing facilities certified to ISO 9001 and ISO 14001, Cosel ensures consistent quality and environmental responsibility.
By merging cutting-edge technology with real-world reliability, Cosel has set the gold standard for DC-DC converters, empowering engineers to push the boundaries of what’s possible in modern electronics.
SUW31215C alternative parts: SUCW32415C
| Hide Shared Attributes |
 |
 |
| Part Number |
SUW31215C +BOM |
SUCW32415C +BOM |
| Manufacturer: |
Cosel USA, Inc. |
Cosel USA, Inc. |
| Description: |
Power Supply;DC-DC;15V@0.1A,15V@0.1A;
9-18V In;Open Frame;Thru Hole;ZU Series |
SUCW3 Series 3 W Dual Output 15 / 30 V
On-Board Type DC-DC Converter |
| Factory Lead Time: |
6 Weeks |
6 Weeks |
| Mount: |
PCB, Through Hole |
Through Hole |
| Mounting Type: |
Through Hole |
Through Hole |
| Package / Case: |
7-DIP Module |
7-DIP Module |
| Weight: |
3.000003g |
5.000005g |
| Operating Temperature: |
-40°C~85°C With Derating |
-40°C~85°C With Derating |
| Series: |
SUW (3W) |
SUCW (3W) |
| Published: |
2005 |
2006 |
| Size / Dimension: |
0.94Lx0.59W x 0.26 H 24.0mmx15.1mmx6.5mm |
0.98Lx0.61W x 0.28 H 25.0mmx15.5mmx7.0mm |
| Part Status: |
Active |
Active |
| Moisture Sensitivity Level (MSL): |
Not Applicable |
Not Applicable |
| Type: |
Isolated Module |
Isolated Module |
| Applications: |
ITE (Commercial) |
ITE (Commercial) |
| Power Rating: |
3W |
- |
| Depth: |
6.5mm |
7mm |
| Reach Compliance Code: |
unknown |
unknown |
| Current Rating: |
100mA |
- |
| Number of Outputs: |
2 |
2 |
| Approval Agency: |
CE, UL |
- |
| Efficiency: |
78% |
76% |
| Voltage - Isolation: |
500V |
500V |
| Voltage - Input (Max): |
18V |
36V |
| Output Voltage: |
15V |
15V |
| Voltage - Input (Min): |
9V |
18V |
| Output Current: |
100mA |
100mA |
| Output Power: |
3W |
3W |
| Voltage - Output 2: |
-15V |
-15V |
| Current - Output 1: |
100mA |
100mA |
| Nominal Input Voltage: |
12V |
- |
| Current - Output 2: |
100mA |
100mA |
| Features: |
Remote On/Off, OCP |
Remote On/Off, OCP |
| Height: |
6.604mm |
7.112mm |
| RoHS Status: |
ROHS3 Compliant |
ROHS3 Compliant |
| Lead Free: |
Lead Free |
Lead Free |
| Packaging: |
- |
Tray |
| Pbfree Code: |
- |
yes |
| Number of Terminations: |
- |
7 |
| ECCN Code: |
- |
EAR99 |
| Terminal Position: |
- |
DUAL |
| Peak Reflow Temperature (Cel): |
- |
NOT SPECIFIED |
| Number of Functions: |
- |
1 |
| Time@Peak Reflow Temperature-Max (s): |
- |
NOT SPECIFIED |
| JESD-30 Code: |
- |
R-XDMA-T7 |
| Input Voltage-Nom: |
- |
24V |
| Trim/Adjustable Output: |
- |
YES |
| Total Power Output-Max: |
- |
3W |
| Isolation: |
- |
Isolated |
| Width: |
- |
15.5mm |
WlS Electronic holds a large inventory of Cosel SUCW32415C. We assure you that these are genuine and brand-new components, directly sourced from Cosel. If needed, we can provide quality test reports for the SUCW32415C. To obtain a quotation, simply fill in the desired quantity, your contact name, and your email address in the quick quotation form on the right. Our sales representatives will get in touch with you within 12 hours. You can contact us online at any time, or send an email to: SALES@WLSCHIP.COM.
