ERO-S2PHF43R0 Equivalent & Substitute Parts

Part Overview

The ERO-S2PHF43R0 is a 43 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 identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new production runs where legacy specifications must be maintained.

Substiute Parts

ERO-S2PHF43R0

Panasonic Electronic ComponentsIn Stock: 1101ERO-S2PHF43R0 Datasheet

Current PartRFQ

RNMF14FTC43R0

Stackpole Electronics IncIn Stock: 17694RNMF14FTC43R0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ERO-S2PHF43R0 is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 43 Ohms (exact match required)
• Tolerance: ±1% (equivalent precision class)
• Power rating: 0.25W / 1/4W (identical dissipation capability)
• Composition: Metal Film (same construction technology)
• Package: Axial (identical form factor and lead configuration)
• Temperature coefficient: ±50ppm/°C (equivalent stability)
• Operating temperature range: minimum -55°C, maximum ≥150°C
• Lead count: 2 terminations (standard axial configuration)

The RNMF14FTC43R0 from Stackpole Electronics Inc meets all substitution criteria. Minor dimensional variations within standard manufacturing tolerances and enhanced features (flame retardant coating) do not affect functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The RNMF14FTC43R0 is a direct functional substitute for the obsolete ERO-S2PHF43R0. Selection is based on the following factors:

• All critical electrical parameters match exactly: resistance, tolerance, power rating, temperature coefficient, and operating temperature range
• Package and form factor are identical (axial through-hole)
• The substitute component is in active production status with high inventory availability (17,608 pcs), ensuring supply chain continuity
• The RNMF14FTC43R0 carries ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements
• Minor dimensional variations (0.003" diameter and 0.004" length increase) remain within standard manufacturing tolerances for axial resistors and do not affect PCB layout or circuit performance
• Enhanced flame retardant coating and safety features of the substitute provide equivalent or superior performance characteristics

Frequently Asked Questions (FAQ)

Q: Can the RNMF14FTC43R0 be used as a direct replacement for the ERO-S2PHF43R0 in existing designs?

A: Yes. Both components share identical electrical specifications (43 Ohms ±1%, 0.25W, ±50ppm/°C, -55°C to ≥150°C operating range) and axial package configuration. The substitute is mechanically compatible with standard PCB layouts designed for 1/4W axial resistors.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (Panasonic vs. Stackpole), product status (obsolete vs. active), and minor dimensional variations. The RNMF14FTC43R0 includes flame retardant coating and meets ROHS3 compliance, while the original ERO-S2PHF43R0 is no longer in production.

Q: Are there any compatibility concerns with PCB assembly or soldering?

A: No. Both components use standard axial lead configuration with 2 terminations. The dimensional difference (approximately 0.003" in diameter and 0.004" in length) is within normal manufacturing tolerances for through-hole axial resistors and does not affect PCB hole spacing or assembly processes.

Q: What certifications and compliance standards apply to the substitute part?

A: The RNMF14FTC43R0 is ROHS3 compliant and REACH unaffected. Both components carry EAR99 export classification and HTSUS code 8533.21.0090.

Q: Why is the operating temperature range of the substitute slightly higher?

A: The RNMF14FTC43R0 operates to 155°C maximum versus 150°C for the original part. This represents an enhancement that maintains full compatibility with designs requiring the original -55°C to 150°C range.