RER45F20R0PC02 Equivalent & Substitute Parts

Part Overview

The RER45F20R0PC02 is a 20 Ohms ±1% 10W wirewound chassis mount resistor manufactured by Vishay Dale, part of the military-grade RER45 series compliant with MIL-PRF-39009. This component is designed for high-reliability applications requiring precision resistance with low temperature coefficient and extended operating temperature range. The part is currently active in production with 605 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and military compliance requirements are met by alternative part numbers within the same manufacturer's product line.

Substiute Parts

RER45F20R0PC02

Vishay DaleIn Stock: 640RER45F20R0PC02 Datasheet

Current PartRFQ

RER65F20R0RC02

Vishay DaleIn Stock: 1035RER65F20R0RC02 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RER45F20R0PC02 is determined by strict equivalence across the following critical parameters:

• Resistance value: 20 Ohms
• Tolerance: ±1%
• Power rating: 10W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Operating temperature range: -55°C to 250°C
• Housing material: Aluminum
• Mounting configuration: Flanges with solder lugs
• Physical dimensions: 0.750" L x 0.800" W x 0.405" H (seated max)
• Military compliance: MIL-PRF-39009
• Moisture sensitivity: MSL 1

The RER65F20R0RC02 meets all these criteria and is classified as a parametric equivalent within the Vishay Dale military resistor portfolio.

Parameter Comparison

Engineering Selection Recommendations

Both the RER45F20R0PC02 and RER65F20R0RC02 are active production components manufactured by Vishay Dale and fully compliant with MIL-PRF-39009. Selection between these parts should be based on the following factors:

The RER65F20R0RC02 offers a superior failure rate specification of R (0.01%) compared to the RER45F20R0PC02 at P (0.1%), representing a tenfold improvement in reliability metrics. Both parts maintain identical electrical and mechanical specifications, including resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The RER65 series represents an enhanced reliability variant within the same military resistor family.

For applications where failure rate is not a critical differentiator, either part is electrically and mechanically interchangeable. For high-reliability or mission-critical applications, the RER65F20R0RC02 is the preferred selection due to its lower failure rate classification.

Frequently Asked Questions (FAQ)

Q: Are the RER45F20R0PC02 and RER65F20R0RC02 electrically identical?

A: Yes. Both parts have identical resistance (20 Ohms), tolerance (±1%), power rating (10W), temperature coefficient (±20ppm/°C), and operating temperature range (-55°C to 250°C).

Q: Can I substitute the RER65F20R0RC02 for the RER45F20R0PC02 in existing designs?

A: Yes. The parts are mechanically and electrically equivalent with identical dimensions, lead styles, and mounting configurations. The RER65 variant offers improved failure rate performance.

Q: What is the difference between the RER45 and RER65 series designations?

A: Both series comply with MIL-PRF-39009. The primary difference is the failure rate classification: RER45 is rated at P (0.1%), while RER65 is rated at R (0.01%).

Q: Are both parts RoHS compliant?

A: No. Both the RER45F20R0PC02 and RER65F20R0RC02 are RoHS non-compliant, consistent with military-grade wirewound resistor specifications.

Q: What is the moisture sensitivity level for these parts?

A: Both parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. The identical physical dimensions (0.750" L x 0.800" W x 0.405" H seated max), lead style (solder lugs), and mounting configuration (flanges) ensure direct mechanical compatibility in existing PCB layouts.