ERJ-S1TF31R6U Equivalent & Substitute Parts

Part Overview

The ERJ-S1TF31R6U is a 31.6 Ohm ±1% 1W thick film chip resistor manufactured by Panasonic Electronic Components in the 2512 (6432 Metric) package. This component is designed for automotive applications and carries AEC-Q200 qualification with anti-sulfur protection. The part is currently in active production status with 900 units available in stock. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design alternatives where component availability or lead times require alternative sourcing.

Substiute Parts

ERJ-S1TF31R6U

Panasonic Electronic ComponentsIn Stock: 965ERJ-S1TF31R6U Datasheet

Current PartRFQ

CRCW251231R6FKEG

Vishay DaleIn Stock: 8269CRCW251231R6FKEG Datasheet

SimilarRFQ

RMCF2512FT31R6

Stackpole Electronics IncIn Stock: 4430RMCF2512FT31R6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ERJ-S1TF31R6U are qualified based on the following electrical and mechanical parameters:

• Resistance value: 31.6 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 1W (exact match required)
• Package: 2512 (6432 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)
• Automotive qualification: AEC-Q200 (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)
• Moisture sensitivity: MSL 1 (exact match required)

All identified substitute parts meet these criteria and are sourced from qualified automotive component manufacturers.

Parameter Comparison

Engineering Selection Recommendations

All three parts—ERJ-S1TF31R6U, CRCW251231R6FKEG, and RMCF2512FT31R6—are functionally equivalent for automotive applications. Selection among these parts should be based on:

• Procurement availability and lead time requirements
• Supply chain preferences and established vendor relationships
• Current inventory levels and cost considerations
• Manufacturing location and logistics requirements

All parts carry active production status, full AEC-Q200 automotive qualification, ROHS3 compliance, and identical electrical and thermal specifications. Physical dimensions vary slightly within acceptable tolerances for the 2512 package format, with no impact on PCB layout or assembly processes.

Frequently Asked Questions (FAQ)

Q: Can CRCW251231R6FKEG or RMCF2512FT31R6 be used as direct replacements for ERJ-S1TF31R6U?

A: Yes. All three parts meet identical electrical specifications (31.6 Ohms ±1%, 1W, ±100ppm/°C), operate across the same temperature range (-55°C ~ 155°C), carry AEC-Q200 automotive qualification, and are packaged in the 2512 (6432 Metric) format. They are functionally interchangeable.

Q: Are there any physical dimension differences between these parts?

A: Minor variations exist within the 2512 package specification. ERJ-S1TF31R6U measures 0.252" L x 0.126" W (6.40mm x 3.20mm). CRCW251231R6FKEG measures 0.248" L x 0.124" W (6.30mm x 3.15mm). RMCF2512FT31R6 measures 0.248" L x 0.126" W (6.30mm x 3.20mm). All dimensions fall within standard 2512 package tolerances and do not affect PCB footprint compatibility or assembly.

Q: Do all substitute parts meet automotive compliance requirements?

A: Yes. All three parts are AEC-Q200 qualified, ROHS3 compliant, and carry MSL 1 (Unlimited) moisture sensitivity ratings. They are suitable for automotive applications without additional qualification.

Q: What is the difference between the anti-sulfur feature on the Panasonic part?

A: The ERJ-S1TF31R6U includes anti-sulfur protection as a specified feature. The substitute parts from Vishay Dale and Stackpole do not list this feature in their specifications. If anti-sulfur protection is a design requirement, the ERJ-S1TF31R6U should be selected. For applications where this feature is not required, all parts are equivalent.

Q: Can these parts be mixed in the same production batch?

A: Yes, provided design documentation and procurement specifications permit multiple qualified sources. All parts meet identical electrical and thermal performance criteria and carry the same automotive certifications.