RNC55H1210FSM23 Equivalent & Substitute Parts

Part Overview

The RNC55H1210FSM23 is a 121 Ohm ±1% 1/8W through-hole axial resistor manufactured by Vishay Dale. This military-grade metal film resistor features moisture resistance and weldability, meeting MIL-PRF-55182/01 specifications. The component is currently active in production with 1050 units in stock. Substitute parts are identified when identical electrical and mechanical parameters are maintained across alternative manufacturing batches or packaging configurations within the same product series.

Substiute Parts

RNC55H1210FSM23

Vishay DaleIn Stock: 1072RNC55H1210FSM23 Datasheet

Current PartRFQ

RNC55H1210FSB14

Vishay DaleIn Stock: 977RNC55H1210FSB14 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The RNC55H1210FSB14 qualifies as a parametric equivalent to the RNC55H1210FSM23 based on the following criteria:

• Identical resistance value: 121 Ohms
• Identical tolerance: ±1%
• Identical power rating: 0.125W (1/8W)
• Identical composition: Metal Film
• Identical temperature coefficient: ±50ppm/°C
• Identical operating temperature range: -65°C to 175°C
• Identical package type: Axial
• Identical physical dimensions: 0.094" Dia × 0.250" L (2.39mm × 6.35mm)
• Identical series specification: Military, MIL-PRF-55182/01, RNC55
• Identical failure rate classification: S (0.001%)

Both parts are manufactured by Vishay Dale and maintain active product status. The substitution is valid for applications requiring these exact electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both RNC55H1210FSM23 and RNC55H1210FSB14 are active military-grade components manufactured by Vishay Dale under the MIL-PRF-55182/01 specification. Selection between these parts should be based on inventory availability and procurement lead times. The RNC55H1210FSM23 currently maintains higher stock levels at 1050 units compared to 917 units for the RNC55H1210FSB14. Both parts carry identical electrical performance characteristics, military qualification status, and physical form factors suitable for through-hole axial mounting applications. RoHS non-compliance status is consistent across both parts.

Frequently Asked Questions (FAQ)

Q: Can RNC55H1210FSB14 be used as a direct replacement for RNC55H1210FSM23?

A: Yes. Both parts maintain identical electrical specifications (121 Ohms ±1%, 0.125W), composition (metal film), temperature characteristics (±50ppm/°C, -65°C to 175°C operating range), and physical dimensions (0.094" Dia × 0.250" L axial package). They are both qualified to MIL-PRF-55182/01 with identical failure rate classifications.

Q: Are there any packaging or form factor differences between these parts?

A: No. Both parts use identical axial through-hole packaging with matching physical dimensions of 0.094" diameter by 0.250" length (2.39mm × 6.35mm). They are mechanically and electrically interchangeable in PCB layouts designed for either part number.

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

A: The suffix variations indicate different manufacturing batches or packaging configurations within the same RNC55 military resistor series. The core electrical and mechanical specifications remain identical, making them functionally equivalent for circuit design purposes.

Q: Are both parts currently available for procurement?

A: Yes. RNC55H1210FSM23 has 1050 units in stock, while RNC55H1210FSB14 has 917 units in stock. Both maintain active product status with Vishay Dale.

Q: Do these parts have identical military specifications?

A: Yes. Both parts comply with MIL-PRF-55182/01 military specifications and carry the same S-class failure rate (0.001%). They are both moisture resistant and weldable metal film resistors suitable for military applications.