RN55D3012FRE6 Equivalent & Substitute Parts

Part Overview

The RN55D3012FRE6 is a 30.1 kOhms ±1% metal film axial resistor rated at 0.125W (1/8W) manufactured by Vishay Dale. This component is part of the Military MIL-R-10509/7 series and features flame retardant coating with moisture resistance suitable for military and high-reliability applications. The part maintains active product status with 1655 units in current inventory. Substitute parts are identified to address availability, compliance requirements, or operational parameter variations while maintaining functional equivalence within specified electrical and mechanical tolerances.

Substiute Parts

RN55D3012FRE6

Vishay DaleIn Stock: 1691RN55D3012FRE6 Datasheet

Current PartRFQ

MFR-25FRF52-30K1

YAGEOIn Stock: 14471MFR-25FRF52-30K1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN55D3012FRE6 is based on the following critical parameters that must remain constant or compatible:

• Resistance Value: 30.1 kOhms (exact match required)
• Tolerance: ±1% (equivalent or tighter tolerance acceptable)
• Composition: Metal Film (maintains stability and temperature coefficient performance)
• Temperature Coefficient: ±100ppm/°C (equivalent performance)
• Package Type: Axial (mechanical and electrical interface compatibility)
• Number of Terminations: 2 (standard axial configuration)

The substitute part MFR-25FRF52-30K1 meets these core substitution criteria. Variations in power rating (0.25W vs. 0.125W) and operating temperature range represent parameter differences that must be evaluated within specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

RN55D3012FRE6 (Main Part): Select this component when military-grade specifications, flame retardant coating, and moisture resistance are mandatory requirements. The extended operating temperature range (-65°C ~ 175°C) supports high-temperature applications. RoHS non-compliance status must be acceptable within the application context.

MFR-25FRF52-30K1 (Substitute): This YAGEO component provides equivalent electrical performance with identical resistance, tolerance, and temperature coefficient. The higher power rating (0.25W vs. 0.125W) offers thermal margin in applications where dissipation headroom is beneficial. ROHS3 compliance and REACH unaffected status address regulatory requirements where RoHS3 certification is mandatory. The reduced operating temperature range (-55°C ~ 155°C) must be verified as acceptable for the target application. Slightly larger physical dimensions require PCB layout verification.

Frequently Asked Questions (FAQ)

Q: Can MFR-25FRF52-30K1 directly replace RN55D3012FRE6 in all applications?

A: Electrical substitution is valid when the operating temperature range of -55°C ~ 155°C is within application limits and RoHS3 compliance is acceptable. Physical dimensions differ slightly (0.094" Dia x 0.248" L vs. 0.090" Dia x 0.240" L), requiring PCB layout verification. Military-grade specifications and flame retardant coating are not present in the substitute part.

Q: What are the key differences between these parts?

A: The main differences are power rating (0.125W vs. 0.25W), operating temperature range (-65°C ~ 175°C vs. -55°C ~ 155°C), regulatory compliance (RoHS non-compliant vs. ROHS3 compliant), and physical dimensions. Electrical parameters (resistance, tolerance, temperature coefficient, composition) are identical.

Q: Is the higher power rating of the substitute part a concern?

A: No. A higher power rating is compatible with applications designed for the lower-rated component. The substitute dissipates heat more efficiently and provides additional thermal margin.

Q: Are there mechanical compatibility issues with the slightly larger dimensions?

A: PCB layout must be verified. The substitute part is 0.004" larger in diameter and 0.008" longer. Clearance around component placement and lead spacing should be confirmed before implementation.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory and environmental requirements. For applications requiring military specifications and extended temperature operation, use RN55D3012FRE6. For applications requiring RoHS3 compliance and REACH compliance, use MFR-25FRF52-30K1.