SCW12A-12 - 12W Isolated DC-DC Converter 9-18V In 12V Out | MEAN WELL
N.º de pieza: SCW12A-12 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $14.62 | $14,62 |
| 10 | $13.55 | $135,50 |
| 100 | $12.65 | $1.265,00 |
| 500 | $11.8 | $5.900,00 |
| 1.000 | $10.95 | $10.950,00 |
SCW12A-12 Descripción general
A board-mount isolated DC-DC converter is a power module that converts one DC voltage to another while providing galvanic isolation between input and output. Within the power management hierarchy - power supply, converter module, DC-DC converter, board-mount module - these parts sit between a raw DC bus (battery, rectified AC, or another rail) and a load that needs a clean, regulated, isolated supply. Isolation prevents ground loops, breaks up common-mode noise paths, and protects downstream circuitry from upstream faults.
Key features of the SCW12A-12 include 1500VDC input-to-output isolation, a built-in remote ON/OFF control for power sequencing, an integrated EMI input filter that reduces external filtering requirements, and comprehensive protection against short circuit and overload. The module is cooled by free-air convection, requiring no heatsink or forced airflow at rated load, and every unit passes a 100% full-load burn-in test before shipment.
The SCW12 series uses a compact regulated single-output topology with a five-sided metal case that provides both electrostatic shielding and mechanical protection on the PCB. Regulation is maintained across the full 9V to 18V input span at rated load, making the part tolerant of battery sag and supply transients in nominal 12V systems.
Typical applications include industrial control boards, distributed power architectures fed from a 12V backplane, battery-powered instrumentation, telecommunications auxiliary supplies, and any design where a small isolated 12V auxiliary or main rail is required from a 9-18V source.
When designing with the SCW12A-12, observe the 200mA minimum load requirement: operating below minimum load can increase output ripple and shift regulation accuracy, so a small pre-load may be needed in light-load designs.
This page synthesizes distributor pricing from 14 sources, drop-in alternatives within the SCW12 family, and practical design guidance not found in the one-page manufacturer datasheet.
Alternativas directas para SCW12A-12 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
SCW12A-9
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
SCW12A-15
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
SCW12A-24
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
SCW12A-5
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
SCW12A-12 Valores máximos y características eléctricas
| Output Power | 12 W |
| Rango de tensión de entrada | 9 V to 18 V DC |
| Tensión de salida | 12 V DC |
| Output Current Range | 200 mA to 1000 mA |
| Número de salidas | 1 (regulated single output) |
| Isolation Voltage | 1500 VDC (input to output) |
| Topología | Isolated module DC-DC converter |
| Remote ON/OFF | Built-in remote control |
| EMI Filter | Built-in EMI filter |
| Protections | Short circuit, overload |
| Cooling Method | Free air convection |
| Construction | Five-sided shield metal case |
| Burn-in Test | 100% full load burn-in test |
| Tipo de montaje | Through Hole |
Guía de configuración de pines de SCW12A-12 standard
Configuración de pines para SCW12A-12 (encapsulado standard). Este dispositivo de potencia presenta terminales de puerta, drenador y fuente. Para encapsulados no polarizados, consulte la hoja de datos del fabricante para conocer la orientación exacta del pin 1 y los detalles del footprint. Las aplicaciones habituales incluyen el diseño de fuentes de alimentación, el accionamiento de motores y la conmutación de cargas.
No hay datos detallados de patillaje disponibles para SCW12A-12.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
SCW12A-12 es adecuado para 6 aplicacións: Industrial Control Boards, Distributed Power Architecture Auxiliary Rail, Battery-Powered Instrumentation, Telecommunications Auxiliary Supplies, Security and Surveillance Equipment, Test and Measurement Fixtures.
Industrial Control Boards
The SCW12A-12 fits industrial control and PLC I/O boards powered from a nominal 12V cabinet bus. Its 9-18V input tolerates bus sag caused by long cable runs and inrush events, while 1500VDC input-to-output isolation separates noisy field-side grounds from sensitive logic, breaking ground loops that would otherwise inject errors into analog inputs. The built-in EMI filter and five-sided metal shield reduce susceptibility in cabinets containing contactors and variable-frequency drives, and free-air convection cooling at the full 12W load removes the need for heatsinks or fans inside sealed enclosures.
Recomendado
Distributed Power Architecture Auxiliary Rail
In distributed power systems where a 12V intermediate bus feeds multiple boards, the SCW12A-12 provides a locally regulated, isolated point-of-load rail at up to 1A. The 2:1 input range accommodates bus droop between shelves, and the built-in remote ON/OFF pin enables sequenced power-up controlled by a supervisor or MCU GPIO, avoiding uncontrolled inrush. Compared with a discrete buck stage, the module adds 1500VDC isolation that protects logic from bus-side faults and suppresses common-mode noise; the trade-off is a 200mA minimum load, so light-duty boards should budget a pre-load or select a heavier loaded sibling board.
Recomendado
Battery-Powered Instrumentation
Portable and vehicle-mounted instruments powered by 12V lead-acid or lithium packs benefit from the SCW12A-12's 9-18V input, which covers both charged and discharged battery states without a pre-regulator. The isolated output keeps measurement circuitry grounds clean relative to the noisy battery and motor environment, improving ADC accuracy in data loggers and test instruments. The remote ON/OFF control allows the system controller to cut module quiescent draw during sleep, and the metal-shielded case resists ESD and radiated interference encountered in field service, while convection cooling suits sealed handheld and IP-rated enclosures.
Recomendado
Telecommunications Auxiliary Supplies
Telecom equipment operating from nominal 12V or 13.8V battery plants can use the SCW12A-12 to generate an isolated, regulated 12V rail for Fans, alarms, or supervision circuits. The built-in EMI filter helps boards meet conducted-emission requirements at the system level, and 1500VDC isolation provides the galvanic separation expected between battery plant grounds and supervisory electronics. The module's five-sided metal case doubles as an RF shield in dense racks, and its 100% full-load burn-in test supports the high reliability expectations of always-on telecom infrastructure with convection-only cooling at rated load.
Recomendado
Security and Surveillance Equipment
Camera and NVR sub-systems in surveillance installations often run from distributed 12V DC feeds of varying quality. The SCW12A-12's 9-18V input absorbs voltage drop along long CCTV cabling, while its regulated 12V, 1A output drives camera boards or network modules cleanly. The 1500VDC isolation between the cable-side supply and the electronics helps suppress ground-loop hum that appears when cameras and recorders share different earth potentials, and the shielded metal case limits radiated emissions near video signal paths. Free-air cooling and overload protection keep the module dependable in outdoor enclosures year-round.
Recomendado
Test and Measurement Fixtures
Bench fixtures and ATE fixtures frequently need a small isolated 12V rail to power device-under-test interfaces independently of the instrument chassis ground. The SCW12A-12 delivers up to 12W from any 9-18V bench or backplane source, and the 1500VDC isolation allows the DUT ground to float, which is essential for differential and high-side measurements. The remote ON/OFF input lets test software gate module power between test steps, and the short-circuit protection survives accidental probe shorts during fixture bring-up, making it a practical, low-cost fixture power element with no heatsink assembly required.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SCW12A-12 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SCW12A-9 | SCW12A-15 | SCW12A-24 | SCW12A-5 |
|---|---|---|---|---|---|
| Brand | MEAN WELL | MEAN WELL | MEAN WELL | MEAN WELL | MEAN WELL |
| Package | Shielded metal case, through-hole (SCW12 series) | Same case - pin-compatible | Same case - pin-compatible | Same case - pin-compatible | Same case - pin-compatible |
| Output Power | 12 W | 12 W | 12 W | 12 W | 12 W |
| Input Voltage Range | 9 V to 18 V | 9 V to 18 V | 9 V to 18 V | 9 V to 18 V | 9 V to 18 V |
| Output Voltage / Current | 12 V / 200 mA to 1000 mA | 9 V / up to ~1.33 A | 15 V / up to 0.8 A | 24 V / up to 0.5 A | 5 V / up to 2.4 A |
| Isolation Voltage | 1500 VDC | 1500 VDC | 1500 VDC | 1500 VDC | 1500 VDC |
| Remote ON/OFF | Built-in | Built-in | Built-in | Built-in | Built-in |
| Protections / Cooling | Short circuit, overload; free air convection | Short circuit, overload; free air convection | Short circuit, overload; free air convection | Short circuit, overload; free air convection | Short circuit, overload; free air convection |
Diferenciadores clave
- 1500VDC galvanic isolation on a 12W through-hole module (frente a SCW12A-5)
- Built-in EMI filter and metal shield reduce external filtering BOM (frente a SCW12A-9)
- Free-air convection cooling at full 12W load (frente a SCW12A-24)
Notas de diseño
Respect the 200mA minimum load of the SCW12A-12. Below this current the module's regulation and ripple specifications are not guaranteed, and output voltage can drift high on very light load. If the system idles, add a permanent pre-load (e.g., 120 ohm 2W resistor for 100mA) or route aalways-on auxiliary load to this rail. Also size the upstream source for inrush: input-side bulk capacitance of at least 100uF close to the pins smooths battery and cable transients within the 9-18V window. Estimated: a 12W module at 85% efficiency draws roughly 1.2A at 12Vin.
Use the remote ON/OFF pin for controlled power-up instead of relying on input ramp. Driving it from an MCU GPIO or supervisor allows sequencing relative to other rails and lets firmware disable the rail during fault conditions. Keep the control trace short and away from the switching nodes; although the module has a built-in EMI filter, a small pi-filter (ferrite bead plus 10uF ceramic) on the input further reduces conducted noise in sensitive analog systems. Provide free-air clearance around the metal case - do not pot or shroud the module at full 12W load.
Do not operate the module into a sustained short circuit; MEAN WELL's datasheet explicitly advises preventing operation in overload or short-circuit conditions rather than relying on the protection circuit continuously. Verify the isolation rating matches your end-system safety class: 1500VDC functional isolation suits industrial separation and ground-loop breaking but is not reinforced medical-grade isolation. Finally, because the case is a five-sided metal shield, ensure it cannot contact adjacent live traces or an ungrounded enclosure - maintain creepage and check the mounting orientation per the datasheet drawing.
Información de cumplimiento
Compliance data not present in the provided verified web data. Consult the MEAN WELL SCW12 series datasheet and the manufacturer product page for RoHS/REACH declarations.
