RER40F3R32PCSL Equivalent & Substitute Parts

Part Overview

The RER40F3R32PCSL is a 3.32 Ohms ±1% 5W wirewound chassis mount resistor manufactured by Vishay Dale, qualified to military standard 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 maintains active product status with 1080 units in current inventory. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter envelope.

Substiute Parts

RER40F3R32PCSL

Vishay DaleIn Stock: 1186RER40F3R32PCSL Datasheet

Current PartRFQ

RER60F3R32RC02

Vishay DaleIn Stock: 1103RER60F3R32RC02 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RER40F3R32PCSL is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (3.32 Ohms), tolerance (±1%), power rating (5W), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 250°C) must be identical.

Mechanical Parameters: Composition (wirewound), housing type (aluminum), mounting feature (flanges), lead style (solder lugs), and physical dimensions (0.600" L x 0.646" W, height 0.335" max) must match exactly.

Qualification: Military standard MIL-PRF-39009 compliance is required.

The identified substitute part RER60F3R32RC02 meets all electrical and mechanical parameter requirements. The primary distinction between the main part and substitute is the failure rate classification and series designation within the MIL-PRF-39009 standard family.

Parameter Comparison

Engineering Selection Recommendations

Both the RER40F3R32PCSL and RER60F3R32RC02 are active, qualified military-grade components manufactured by Vishay Dale to MIL-PRF-39009 specification. Selection between these parts is based on application-specific failure rate requirements and inventory availability.

The RER40F3R32PCSL (failure rate P, 0.1%) is suitable for standard military and high-reliability applications where the specified failure rate classification meets system requirements.

The RER60F3R32RC02 (failure rate R, 0.01%) provides enhanced reliability with a lower failure rate classification and is appropriate for mission-critical applications requiring superior reliability margins. This substitute maintains identical electrical and mechanical parameters while offering improved reliability performance within the same physical form factor and mounting interface.

Both parts carry identical RoHS non-compliance status and moisture sensitivity level, indicating equivalent environmental handling and storage requirements. Current inventory levels support immediate procurement of either option.

Frequently Asked Questions (FAQ)

Q: Can RER60F3R32RC02 be used as a direct replacement for RER40F3R32PCSL?

A: Yes. The RER60F3R32RC02 is electrically and mechanically equivalent. All critical parameters including resistance, tolerance, power rating, temperature coefficient, operating temperature range, physical dimensions, and mounting features are identical. Both components meet MIL-PRF-39009 qualification requirements.

Q: What is the difference between the RER40 and RER60 series designations?

A: Both are qualified to MIL-PRF-39009 military standard. The primary distinction is the failure rate classification: RER40 series carries failure rate P (0.1%), while RER60 series carries failure rate R (0.01%). The RER60 series provides lower failure rate performance for applications requiring enhanced reliability.

Q: Are the physical dimensions and mounting interfaces identical?

A: Yes. Both parts share identical dimensions (0.600" L x 0.646" W, 15.24mm x 16.41mm), maximum seated height (0.335" / 8.51mm), aluminum housing, flanged mounting feature, and solder lug lead style. No mechanical redesign or PCB layout modification is required for substitution.

Q: Do both parts have the same environmental specifications?

A: Yes. Both components operate across -55°C to 250°C, maintain ±50ppm/°C temperature coefficient, carry moisture sensitivity level 1 (unlimited), and are RoHS non-compliant. Environmental handling, storage, and operational requirements are identical.

Q: Which part should be selected for new designs?

A: Selection depends on application failure rate requirements. For standard military and high-reliability applications, either part is acceptable. For mission-critical systems requiring maximum reliability margins, the RER60F3R32RC02 with lower failure rate classification is appropriate. Both parts are active products with current inventory availability.