RER40F1401MCSL Equivalent & Substitute Parts

Part Overview

The RER40F1401MCSL is a 1.4 kOhms ±1% 5W wirewound chassis mount resistor manufactured by Vishay Dale, part of the military-grade MIL-PRF-39009 RER40 series. This component is designed for applications requiring high precision, high power dissipation, and reliable performance across extended temperature ranges. The part is currently active with 918 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when inventory constraints require component flexibility.

Substiute Parts

RER40F1401MCSL

Vishay DaleIn Stock: 996RER40F1401MCSL Datasheet

Current PartRFQ

RER60F1401RC02

Vishay DaleIn Stock: 943RER60F1401RC02 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RER40F1401MCSL are identified based on strict equivalence of the following critical parameters:

• Resistance value: 1.4 kOhms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Operating temperature range: -55°C to 250°C
• Mounting feature: Flanges
• Lead style: Solder Lugs
• Housing type: Aluminum
• Physical dimensions: 0.600" L x 0.646" W (15.24mm x 16.41mm)
• Height - Seated (Max): 0.335" (8.51mm)
• Military specification compliance: MIL-PRF-39009

The RER60F1401RC02 meets all these criteria and qualifies as a parametric equivalent substitute. Both parts belong to the Vishay Dale military resistor family and maintain identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the RER40F1401MCSL and RER60F1401RC02 are active products manufactured by Vishay Dale under the MIL-PRF-39009 military specification. They are electrically and mechanically identical across all critical parameters: resistance, tolerance, power rating, temperature coefficient, operating range, and physical dimensions.

The RER60F1401RC02 offers a lower failure rate (R at 0.01% versus M at 1%), which may provide enhanced reliability in mission-critical applications. Both parts maintain identical RoHS non-compliance status and MSL rating of 1 (Unlimited).

Selection between these parts should be based on availability, inventory levels, and application-specific reliability requirements. Both parts are suitable for direct substitution in circuits designed for the RER40F1401MCSL.

Frequently Asked Questions (FAQ)

Q: Can the RER60F1401RC02 be used as a direct replacement for the RER40F1401MCSL?

A: Yes. Both parts are parametrically equivalent across all electrical and mechanical specifications, including resistance, tolerance, power rating, temperature coefficient, operating temperature range, and physical dimensions. Direct substitution is supported.

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

A: Both series comply with MIL-PRF-39009 military specification. The primary difference is the failure rate classification: RER40 is rated at M (1%), while RER60 is rated at R (0.01%). Both are qualified military-grade components.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts have identical dimensions of 0.600" L x 0.646" W (15.24mm x 16.41mm) with a maximum seated height of 0.335" (8.51mm). They use identical flanged mounting features and solder lug lead styles.

Q: Do these parts have the same temperature performance?

A: Yes. Both parts have identical temperature coefficients of ±20ppm/°C and operate across the same temperature range of -55°C to 250°C.

Q: What is the inventory status for these parts?

A: The RER40F1401MCSL has 918 units in stock, and the RER60F1401RC02 has 839 units in stock. Both are available as new original components.