Overview
The Vishay Dale RH-25-121 is an industrial-grade wirewound power resistor designed for demanding electrical and electronic applications. This 25W, 2Ω unit delivers stable performance in power dissipation circuits with a tight ±1% tolerance and aluminum-housed construction optimized for thermal management. The RH-25 series combines proven wirewound technology with chassis-mount design, making it a standard choice for equipment manufacturers and field service technicians.
Key Features
- 25W power rating with aluminum heatsink enclosure for efficient thermal dissipation
- Low resistance value (2Ω) with ±1% accuracy for precise power control applications
- Wirewound construction ensures excellent stability and low inductance
- Axial lead terminals with solder lugs for reliable connections
- Industrial-grade design suitable for chassis mounting with UNC-2A threaded terminals
- Bulk-packed (10 units per pack) for convenient inventory management
Technical Specifications
The RH-25-121 meets industrial standards and operates reliably across a wide temperature range with appropriate derating above 25°C ambient. Full technical validation is required for each specific application per manufacturer guidelines.
Typical Applications
- Power supply load banks and test equipment
- Motor control and braking circuits
- High-power LED drivers and energy management systems
- Industrial heating and thermal control circuits
- Telecom and power distribution equipment
Compatibility & Replacements
Compatible With
- Chassis-mount power dissipation circuits requiring 25W rated resistors
- Industrial control systems and UPS equipment
- Thermal test benches and load bank assemblies
- Military and commercial power electronics (MIL-PRF-18546 qualified alternatives available)
Replaces / Drop-In Replacement For
The RH-25-121 is the standard 2Ω, 25W configuration in the Vishay Dale RH-25 series. For exact replacement confirmation, consult your system integrator or Vishay technical support, as direct substitution depends on lead style and mounting requirements.
Works With
- Standard power circuit topologies and industrial control platforms
- Heat sink assemblies and thermal management systems
- Precision power supply designs with tight tolerance requirements
