Equivalent & Substitute Parts for RLR05C2491FSM23

Part Overview

The RLR05C2491FSM23 is a 2.49 kOhm ±1% metal film axial resistor rated at 0.125W (1/8W) manufactured by Vishay Dale. This component is part of the military-grade RLR05 series, compliant with MIL-PRF-39017/05 specifications. The part features moisture resistance and weldability characteristics suitable for military and aerospace applications. The component is currently active in production with 1020 units in stock. Substitute parts are identified when inventory constraints or procurement timelines necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

RLR05C2491FSM23

Vishay DaleIn Stock: 1034RLR05C2491FSM23 Datasheet

Current PartRFQ

RLR05C2491FSB14

Vishay DaleIn Stock: 1299RLR05C2491FSB14 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RLR05C2491FSM23 is determined by strict equivalence across the following parameters:

• Resistance value: 2.49 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.125W / 1/8W (exact match required)
• Composition: Metal Film (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -65°C to 150°C (exact match required)
• Package type: Axial (exact match required)
• Physical dimensions: 0.066" Dia × 0.150" L (exact match required)
• Series compliance: MIL-PRF-39017/05, RLR05 (exact match required)

The identified substitute part RLR05C2491FSB14 meets all electrical and mechanical parameters specified for the main part, establishing direct parametric equivalence within the RLR05 military resistor series.

Parameter Comparison

Engineering Selection Recommendations

Both RLR05C2491FSM23 and RLR05C2491FSB14 are active production components manufactured by Vishay Dale within the military-qualified RLR05 series. Selection between these parts should be based on procurement availability and lead time requirements. Both components carry identical electrical performance specifications, military compliance certifications, and physical characteristics. The RLR05C2491FSB14 currently maintains higher inventory availability (1261 units) compared to the RLR05C2491FSM23 (1020 units), which may influence sourcing decisions for high-volume applications. Both parts are RoHS non-compliant and REACH-affected, with identical ECCN (EAR99) and HTSUS (8533.21.0090) classifications.

Frequently Asked Questions (FAQ)

Q: Are RLR05C2491FSM23 and RLR05C2491FSB14 electrically interchangeable?

A: Yes. Both parts are parametrically equivalent with identical resistance values (2.49 kOhms), tolerance (±1%), power rating (0.125W), temperature coefficient (±100ppm/°C), and operating temperature range (-65°C to 150°C).

Q: Do these parts have identical physical dimensions?

A: Yes. Both components share identical axial package dimensions of 0.066" diameter × 0.150" length (1.68mm × 3.81mm), ensuring mechanical compatibility in PCB layouts and through-hole applications.

Q: Are both parts military-qualified?

A: Yes. Both RLR05C2491FSM23 and RLR05C2491FSB14 comply with MIL-PRF-39017/05 specifications and are classified within the military RLR05 series with identical failure rate ratings of S (0.001%).

Q: What is the difference between these two part numbers?

A: The parts are parametrically identical. Differences exist only in manufacturing batch codes (FSM23 versus FSB14), which do not affect electrical or mechanical performance.

Q: Can these resistors be used in aerospace applications?

A: Both parts meet military specifications and possess the required moisture resistance and weldability features for military and aerospace environments. Compliance verification with specific application standards should be conducted during design qualification.