ERO-S2PHF18R0 Equivalent & Substitute Parts

Part Overview

The ERO-S2PHF18R0 is an 18 Ohm ±1% metal film axial resistor rated at 0.25W (1/4W) for through-hole applications. Manufactured by Panasonic Electronic Components, this part operates across -55°C to 150°C with a temperature coefficient of ±50ppm/°C. The product is currently obsolete, making identification of active equivalent components essential for ongoing production, maintenance, and design continuity.

Substiute Parts

ERO-S2PHF18R0

Panasonic Electronic ComponentsIn Stock: 2497ERO-S2PHF18R0 Datasheet

Current PartRFQ

RNMF14FTC18R0

Stackpole Electronics IncIn Stock: 20382RNMF14FTC18R0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The RNMF14FTC18R0 from Stackpole Electronics Inc qualifies as a direct substitute based on matching electrical specifications: identical 18 Ohm resistance, ±1% tolerance, 0.25W power rating, metal film composition, and ±50ppm/°C temperature coefficient. Both parts are axial through-hole resistors with 2 terminations and MSL 1 classification.

Substitution is valid because the critical parameters—resistance value, tolerance, power dissipation capability, and thermal characteristics—are identical. The Stackpole part is currently active in production, addressing the obsolescence of the Panasonic ERO-S2PHF18R0. Physical dimensions show minor variation (0.070" Dia x 0.130" L versus 0.067" Dia x 0.126" L), which remains within acceptable mechanical tolerances for standard through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

The RNMF14FTC18R0 is the appropriate substitute for the obsolete ERO-S2PHF18R0. Both parts meet identical electrical requirements for 18 Ohm ±1% metal film axial resistor applications at 0.25W power dissipation.

The Stackpole RNMF14FTC18R0 offers additional advantages: active production status ensures long-term availability, extended operating temperature range to 155°C (versus 150°C), and flame retardant coating with safety features. The part is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Physical dimensions are compatible with standard through-hole PCB layouts. The minor size variation (0.003" diameter and 0.004" length differences) does not impact mechanical fit or electrical performance in typical circuit board designs.

Frequently Asked Questions (FAQ)

Q: Can RNMF14FTC18R0 directly replace ERO-S2PHF18R0 in existing designs?

A: Yes. Both parts share identical electrical specifications: 18 Ohm resistance, ±1% tolerance, 0.25W power rating, metal film composition, and ±50ppm/°C temperature coefficient. Axial package compatibility and 2-termination configuration enable direct substitution in through-hole applications.

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

A: The RNMF14FTC18R0 includes flame retardant coating and safety features as standard. This does not affect electrical performance or substitution suitability; it represents an enhancement in component safety characteristics.

Q: Are there mechanical fit concerns due to size differences?

A: No. The RNMF14FTC18R0 dimensions (0.070" Dia x 0.130" L) differ minimally from the ERO-S2PHF18R0 (0.067" Dia x 0.126" L). These variations fall within standard PCB through-hole tolerances and do not impact mechanical assembly or electrical function.

Q: Why is the Stackpole part rated to 155°C while the Panasonic part is rated to 150°C?

A: The extended temperature range of the Stackpole RNMF14FTC18R0 reflects its active design specification. Both parts operate safely within the -55°C to 150°C range required by the original design; the additional 5°C headroom on the Stackpole part provides margin for demanding thermal environments.

Q: What is the difference between MSL 1 and "Not Applicable"?

A: The ERO-S2PHF18R0 carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The RNMF14FTC18R0 lists MSL as "Not Applicable," which is typical for metal film axial resistors and indicates equivalent moisture performance. Both parts are suitable for standard storage and handling conditions.