Vishay Intertechnology's RPWA 650 Power Resistors, Wire Thick Film
The Vishay MCB RPWA 650 series represents a new generation of thick film power resistors from Vishay Intertechnology, Inc., engineered to deliver an industry-leading 650 W of continuous power within a compact, low-profile package. These resistors are designed to address the growing demand for higher power density in electronic systems, enabling designers to reduce component counts, save valuable board space, and streamline overall system designs.
A key differentiator of the RPWA 650 series is its innovative "cold system" baseplate design, which facilitates highly efficient heat transfer to an external heatsink. This design ensures stable operation across a wide temperature range, from -55 °C to +155 °C. Further enhancing design flexibility and integration, the devices offer customizable cabling and the option to integrate an NTC temperature sensor directly into the housing.
By combining high power capabilities with a compact form factor and integrated features, the RPWA 650 series simplifies assembly and reduces wiring complexity. Its easy-mount design with self-calibrating pressure eliminates the need for board-level soldering, allowing for faster plug-and-play integration into power modules and assemblies. This makes the RPWA 650 series a crucial component for advanced power management in demanding applications.
Specifications
| Product | Manufacturer | Power Rating | Resistance Range | Tolerance | Max Operating Voltage | Dielectric Strength | Self-Inductance | Operating Temperature |
|---|---|---|---|---|---|---|---|---|
| RPWA 650 series | Vishay Intertechnology | 650 W (continuous) | 6.2 Ω to 1 MΩ | ± 5 % | 6000 VDC | 7000 VRMS | ≤ 40 nH | -55 °C to +155 °C |
Key Features
- Delivers an industry-leading 650 W of continuous power.
- Features a low-profile package for space-saving designs.
- Incorporates a "cold system" baseplate design for efficient heat transfer to an external heatsink.
- Supports stable operation over a wide temperature range from -55 °C to +155 °C.
- Offers customizable cabling options.
- Includes optional integration of an NTC temperature sensor in a single housing.
- Provides an easy-mount design with self-calibrating pressure, eliminating board-level soldering.
- Reduces wiring and assembly complexity, enabling faster plug-and-play integration.
- Available with resistance values ranging from 6.2 Ω to 1 MΩ, with tolerances down to ± 5 %.
- Offers high-voltage capability with a maximum operating voltage of up to 6000 VDC.
- Boasts a dielectric strength of up to 7000 VRMS.
- Has a typical self-inductance of ≤ 40 nH, minimising transient overshoot in fast-switching circuits.
- Supports high pulse energy capability, allowing repetitive operation up to 3.5 J per pulse for 50 μs pulses.
- Is RoHS-compliant and pending AEC-Q200 qualification.
Applications
- Automotive systems, particularly in harsh environments.
- Energy systems requiring robust power management.
- Industrial systems demanding high power density and reliability.
- Medical equipment where stable and precise power control is critical.
- Avionics systems operating in challenging conditions.
- Precharge, discharge, and active discharge circuits.
- Power conversion applications.
- Snubber operations in high-voltage and fast-switching circuits.
Availability
Vishay Intertechnology’s new RPWA 650 series thick-film power resistors are available now in both samples and production quantities, with lead times of 8 to 12 weeks. The devices deliver up to 650 W of continuous power in a low-profile package and are designed for applications including automotive, energy, industrial, medical, and avionics systems.
