Overview
The Vishay Dale RER65F4R99R is a high-reliability wirewound power resistor delivering precise 4.99Ω resistance at 10W power dissipation. This pack of 10 units meets MIL-PRF-39009 specifications and is designed for military, aerospace, industrial, and telecommunications applications where precise, stable resistance values are critical. The aluminum heat sink housing provides excellent thermal management and environmental protection in demanding conditions.
Key Features
- MIL-PRF-39009 qualified Type RER, R-Level reliability
- Aluminum housing with hard anodic coating for thermal and environmental protection
- 1% tolerance for precision circuit design and performance accuracy
- Wirewound construction with complete welded design for durability
- Molded silicone construction ensures total environmental sealing
- Stainless steel end caps with tinned Copperweld® standard terminals
- Available in pack of 10 for system builds and inventory stocking
Technical Specifications
The Vishay Dale RER65F4R99R offers robust performance characteristics suitable for power applications:
- Resistance Value: 4.99Ω ±1%
- Power Rating (at 25°C): 10W (requires proper heat sink mounting)
- Element Material: Copper-nickel or nickel-chrome alloy
- Core Material: Ceramic or alumina
- Housing: Aluminum with hard anodic coating
- Molded Construction: Silicone encapsulant for environmental protection
- Terminals: Stainless steel end caps with tinned Copperweld leads
- Configuration: Non-inductive winding option available
- Qualification: MIL-PRF-39009 Type RER, R-Level
Typical Applications
- Power supplies and voltage regulation circuits
- Current limiting and load testing applications
- Load banks and dummy load assemblies
- Military and aerospace equipment
- Telecommunications and network infrastructure
- Test and measurement instrumentation
- Industrial process control and heating circuits
Compatibility & Replacements
Compatible With
- Military and aerospace specifications requiring MIL-PRF-39009 qualification
- Thermal management systems with proper 4″ × 6″ × 2″ × 0.040″ heat sinks
- High-reliability applications in temperature ranges from -55°C to +200°C (temperature derating applies)
- Precision circuit designs requiring ±1% tolerance resistors
Replaces / Drop-In Replacement For
The Vishay Dale RER65F4R99R is the standard commercial equivalent for military RER specifications. Verify compatibility with your system integrator before ordering for critical applications.
Works With
- DC and AC power circuits up to rated wattage
- Heat sink mounting systems (requires proper thermal interface)
- Pulse and transient applications (consult datasheet for derating)
- Industrial and laboratory test equipment
