ERO-S2PHF51R0 Equivalent & Substitute Parts

Part Overview

The ERO-S2PHF51R0 is a 51 Ohm ±1% 0.25W (1/4W) through-hole resistor with axial metal film construction, manufactured by Panasonic Electronic Components. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 150°C with a temperature coefficient of ±50ppm/°C, suitable for general-purpose analog and digital circuit applications requiring precision resistive elements.

Substiute Parts

ERO-S2PHF51R0

Panasonic Electronic ComponentsIn Stock: 1078ERO-S2PHF51R0 Datasheet

Current PartRFQ

RNMF14FTC51R0

Stackpole Electronics IncIn Stock: 158279RNMF14FTC51R0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERO-S2PHF51R0 is determined by the following critical parameters:

• Resistance value: 51 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W / 1/4W (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)

The RNMF14FTC51R0 from Stackpole Electronics Inc meets all critical electrical and mechanical parameters. Both parts share identical resistance, tolerance, power rating, composition, and package configuration. The substitute maintains the same temperature coefficient specification and operates within a compatible temperature range (-55°C to 155°C versus -55°C to 150°C).

Parameter Comparison

Engineering Selection Recommendations

The RNMF14FTC51R0 is the qualified substitute for the obsolete ERO-S2PHF51R0. Selection is based on the following factors:

• All critical electrical parameters match exactly: 51 Ohm resistance, ±1% tolerance, 0.25W power rating, and ±50ppm/°C temperature coefficient
• Both components use metal film construction in axial through-hole packaging
• The substitute maintains active product status with confirmed availability (158,234 pcs in stock)
• ROHS3 compliance certification is provided for the substitute, supporting modern manufacturing and environmental standards
• Physical dimensions show minor variation (0.070" vs 0.067" diameter; 0.130" vs 0.126" length), which remains within acceptable tolerances for standard PCB through-hole layouts
• Operating temperature range of the substitute (-55°C to 155°C) exceeds the original specification (-55°C to 150°C)

Frequently Asked Questions (FAQ)

Q: Can the RNMF14FTC51R0 be used as a direct replacement for the ERO-S2PHF51R0?

A: Yes. Both components share identical electrical specifications (51 Ohms, ±1%, 0.25W, metal film, ±50ppm/°C). The axial through-hole package configuration is identical, and physical dimensions are compatible with standard PCB hole spacing.

Q: What is the significance of the flame retardant coating on the RNMF14FTC51R0?

A: The flame retardant coating and safety designation on the Stackpole component are additional features not present on the original Panasonic part. These features do not affect electrical performance or substitution compatibility; they represent an enhancement in the substitute component.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist. The RNMF14FTC51R0 has a slightly larger diameter (0.070" vs 0.067") and length (0.130" vs 0.126"). These differences remain within standard PCB through-hole tolerances and do not affect mechanical fit or electrical performance in typical applications.

Q: What is the difference in operating temperature range?

A: The original ERO-S2PHF51R0 operates from -55°C to 150°C, while the RNMF14FTC51R0 operates from -55°C to 155°C. The substitute provides a 5°C extended upper temperature limit, which is advantageous for applications requiring higher thermal margins.

Q: Is the RNMF14FTC51R0 RoHS compliant?

A: Yes, the RNMF14FTC51R0 is ROHS3 compliant. The original ERO-S2PHF51R0 does not specify RoHS compliance status. For applications requiring RoHS certification, the Stackpole substitute meets this requirement.

Q: What packaging format is available for the RNMF14FTC51R0?

A: The substitute is supplied in Cut Tape (CT) packaging, which is standard for through-hole resistor distribution and compatible with automated assembly processes.