Equivalent & Substitute Parts for ERO-S2PHF3902

Part Overview

The ERO-S2PHF3902 is a 39 kOhms ±1% 0.25W through-hole resistor with axial metal film construction manufactured by Panasonic Electronic Components. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new production builds. The part operates across a temperature range of -55°C to 150°C and features a temperature coefficient of ±50ppm/°C, suitable for general-purpose analog and digital circuit applications requiring precision resistive elements.

Substiute Parts

ERO-S2PHF3902

Panasonic Electronic ComponentsIn Stock: 715ERO-S2PHF3902 Datasheet

Current PartRFQ

RNMF14FTC39K0

Stackpole Electronics IncIn Stock: 12345RNMF14FTC39K0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ERO-S2PHF3902 is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 39 kOhms (exact match required)
• Tolerance: ±1% (precision class match)
• Power rating: 0.25W / 1/4W (thermal capability match)
• Composition: Metal Film (performance characteristics match)
• Temperature coefficient: ±50ppm/°C (stability match)
• Package: Axial through-hole (mechanical fit match)
• Operating temperature range: minimum -55°C to 150°C (environmental capability match)

The RNMF14FTC39K0 from Stackpole Electronics Inc meets all substitution criteria. This part maintains identical electrical specifications while offering enhanced features including flame retardant coating and safety certification. The operating temperature range extends to 155°C, providing additional thermal margin. Physical dimensions vary slightly (0.070" Dia x 0.130" L versus 0.067" Dia x 0.126" L), remaining within acceptable tolerances for standard through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

The RNMF14FTC39K0 is the direct functional equivalent for the obsolete ERO-S2PHF3902. Selection of this substitute is supported by:

• Identical electrical performance across all critical parameters (resistance, tolerance, power rating, temperature coefficient)
• Active product status ensuring long-term availability and supply chain continuity
• ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements
• Enhanced safety features through flame retardant coating
• Extended operating temperature range to 155°C, providing additional design margin
• Established manufacturing and quality standards from Stackpole Electronics Inc

The minor dimensional variations (0.003" diameter increase, 0.004" length increase) are within standard PCB through-hole tolerances and do not impact mechanical fit or electrical performance in standard applications.

Frequently Asked Questions (FAQ)

Q: Can the RNMF14FTC39K0 be used as a direct replacement for the ERO-S2PHF3902?

A: Yes. Both parts share identical resistance (39 kOhms), tolerance (±1%), power rating (0.25W), composition (metal film), and temperature coefficient (±50ppm/°C). The axial package configuration and two-terminal design are identical. Physical dimensions differ slightly but remain compatible with standard through-hole PCB layouts.

Q: What is the significance of the flame retardant coating on the RNMF14FTC39K0?

A: The flame retardant coating is an additional safety feature that does not alter electrical performance. It provides enhanced protection in applications subject to flammability standards or safety certifications. This feature is additive and does not create incompatibility with the original design.

Q: Does the extended operating temperature range of the RNMF14FTC39K0 (to 155°C) affect compatibility?

A: No. The extended range is a superset of the original specification (-55°C to 150°C). The substitute part maintains full performance across the original operating window and provides additional thermal margin for demanding applications.

Q: Are there any compliance or certification differences between these parts?

A: The RNMF14FTC39K0 carries ROHS3 compliance and REACH unaffected status. The original ERO-S2PHF3902 compliance status is not specified in available documentation. For applications requiring specific regulatory compliance, the RNMF14FTC39K0 meets current environmental and safety standards.

Q: Will the slight dimensional differences affect PCB layout or assembly?

A: No. The dimensional variations (0.003" diameter, 0.004" length) are within standard manufacturing tolerances for through-hole components and do not require PCB redesign or assembly process modification.