RN55D1213FBSL Equivalent & Substitute Parts

Part Overview

The RN55D1213FBSL is a 121 kOhms ±1% metal film through-hole resistor rated at 0.125W (1/8W) in axial package configuration. Manufactured by Vishay Dale, this component is part of the military-grade RN55 series compliant with MIL-R-10509/7 specifications. The part features flame retardant coating, moisture resistance, and safety-rated construction suitable for military and high-reliability applications. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and performance characteristics within the RN55 series.

Substiute Parts

RN55D1213FBSL

Vishay DaleIn Stock: 816RN55D1213FBSL Datasheet

Current PartRFQ

RN55C1213FB14

Vishay DaleIn Stock: 1794RN55C1213FB14 Datasheet

UpgradeRFQ

RN55D1213FB14

Vishay DaleIn Stock: 1232RN55D1213FB14 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RN55D1213FBSL are identified within the RN55 military resistor series based on matching the following critical parameters:

• Resistance value: 121 kOhms
• Tolerance: ±1%
• Power rating: 0.125W (1/8W)
• Package configuration: Axial through-hole
• Physical dimensions: 0.090" Dia x 0.240" L
• Operating temperature range: -65°C to 175°C
• Composition: Metal film
• Military specification compliance: MIL-R-10509/7

Substitution within this group is permissible when these parameters remain constant. Variations in temperature coefficient (±50ppm/°C vs. ±100ppm/°C) do not preclude substitution, as both values fall within acceptable military-grade performance tolerances for this resistor category.

Parameter Comparison

Engineering Selection Recommendations

All three parts—RN55D1213FBSL, RN55C1213FB14, and RN55D1213FB14—are active products manufactured by Vishay Dale within the military-qualified RN55 series. Selection among these equivalents is based on availability and compliance requirements:

RN55C1213FB14 offers improved temperature coefficient performance at ±50ppm/°C, providing tighter stability across the operating temperature range compared to the ±100ppm/°C specification of RN55D1213FBSL and RN55D1213FB14. All parts maintain identical electrical ratings, mechanical compatibility, and military specification compliance. RoHS non-compliance status is consistent across all three parts.

Frequently Asked Questions (FAQ)

Q: Can RN55C1213FB14 be used as a direct replacement for RN55D1213FBSL?

A: Yes. Both parts share identical resistance (121 kOhms), tolerance (±1%), power rating (0.125W), package configuration (axial), physical dimensions, and operating temperature range (-65°C to 175°C). The difference in temperature coefficient (±50ppm/°C vs. ±100ppm/°C) does not prevent substitution; RN55C1213FB14 provides superior temperature stability.

Q: What is the difference between RN55D1213FB14 and RN55D1213FBSL?

A: Both parts are parametrically equivalent with identical electrical and mechanical specifications. The designation difference reflects manufacturing or packaging variations within the RN55 series. Both maintain ±100ppm/°C temperature coefficient and full military compliance.

Q: Are these parts interchangeable in PCB assembly?

A: Yes. All three parts feature identical axial package configuration with 0.090" diameter and 0.240" length, ensuring mechanical compatibility with existing PCB layouts and through-hole mounting patterns.

Q: Do all substitute parts meet MIL-R-10509/7 specifications?

A: Yes. RN55D1213FBSL, RN55C1213FB14, and RN55D1213FB14 are all qualified to MIL-R-10509/7 military specifications and share identical feature sets including flame retardant coating, moisture resistance, and safety rating.

Q: Which part should be selected for temperature-critical applications?

A: RN55C1213FB14 is the appropriate selection for applications requiring tighter temperature stability, as it specifies ±50ppm/°C temperature coefficient compared to ±100ppm/°C for the other two parts.