RLR05C1212FSM23 Equivalent & Substitute Parts

Part Overview

The RLR05C1212FSM23 is a 12.1 kOhms ±1% metal film through-hole resistor rated at 0.125W (1/8W) in axial package configuration. Manufactured by Vishay Dale under the military-grade RLR05 series per MIL-PRF-39017/05 specification, this component is designed for applications requiring moisture resistance and weldability in military and aerospace environments. The part maintains active product status with 825 units currently in stock. Substitute parts may be required due to inventory constraints, supply chain considerations, or specific procurement requirements while maintaining identical electrical and mechanical performance.

Substiute Parts

RLR05C1212FSM23

Vishay DaleIn Stock: 848RLR05C1212FSM23 Datasheet

Current PartRFQ

RLR05C1212FSB14

Vishay DaleIn Stock: 1143RLR05C1212FSB14 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RLR05C1212FSM23 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part RLR05C1212FSB14 qualifies as a parametric equivalent based on the following criteria:

Matching Parameters (Substitution Basis):

• Resistance value: 12.1 kOhms
• Tolerance: ±1%
• Power rating: 0.125W (1/8W)
• Composition: Metal Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -65°C to 150°C
• Package configuration: Axial
• Physical dimensions: 0.066" Dia × 0.150" L (1.68mm × 3.81mm)
• Series: Military, MIL-PRF-39017/05, RLR05
• Features: Military Grade, Moisture Resistant, Weldable
• Failure rate: S (0.001%)
• Termination count: 2

The substitute part maintains identical functional and mechanical specifications, enabling direct replacement in circuit applications without performance degradation.

Parameter Comparison

Engineering Selection Recommendations

Both RLR05C1212FSM23 and RLR05C1212FSB14 maintain active product status with full military-grade compliance under MIL-PRF-39017/05 specification. Selection between these parts should be based on procurement availability and inventory requirements. The RLR05C1212FSB14 currently maintains higher inventory levels (1125 units versus 825 units), which may provide supply chain advantages for high-volume applications. Both parts carry identical RoHS non-compliance status, REACH affected designation, ECCN EAR99 classification, and HTSUS code 8533.21.0090. No technical differentiation exists between these components for circuit design purposes.

Frequently Asked Questions (FAQ)

Q: Can RLR05C1212FSB14 be used as a direct replacement for RLR05C1212FSM23?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (12.1 kOhms ±1%, 0.125W metal film), mechanical dimensions (0.066" Dia × 0.150" L axial package), and military-grade performance characteristics. Direct substitution is permissible without circuit modification.

Q: Are there differences in military specification compliance between these parts?

A: No. Both parts conform to MIL-PRF-39017/05 specification and carry identical military-grade classification, failure rate (S 0.001%), and feature set (moisture resistant, weldable).

Q: What is the significance of the different part number suffixes (FSM23 vs FSB14)?

A: The suffix variations indicate different manufacturing batches or procurement lot designations within the RLR05 series. These designations do not reflect electrical or mechanical performance differences.

Q: Are both parts suitable for high-reliability aerospace applications?

A: Both parts meet military-grade specifications and carry identical failure rate classifications. Selection should be based on specific procurement requirements and inventory availability rather than performance differentiation.

Q: Do these parts have identical physical footprints for PCB assembly?

A: Yes. Both parts share identical axial package dimensions (0.066" Dia × 0.150" L, 1.68mm × 3.81mm) and two-termination configuration, ensuring identical PCB layout compatibility.