ERJ-S1TF8450U Equivalent & Substitute Parts

Part Overview

The ERJ-S1TF8450U is a 845 Ohms ±1% 1W chip resistor in 2512 (6432 Metric) package manufactured by Panasonic Electronic Components. This thick film resistor features anti-sulfur coating and automotive AEC-Q200 qualification, designed for high-reliability applications in automotive and industrial environments. The part is currently in active production status with 1045 units in stock.

Substitute parts become necessary when the primary part reaches end-of-life, experiences supply constraints, or when design flexibility is required for multi-source component strategies in production environments.

Substiute Parts

ERJ-S1TF8450U

Panasonic Electronic ComponentsIn Stock: 1098ERJ-S1TF8450U Datasheet

Current PartRFQ

ERJ-1TNF8450U

Panasonic Electronic ComponentsIn Stock: 5081ERJ-1TNF8450U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S1TF8450U is determined by strict equivalence across the following critical parameters:

• Resistance value: 845 Ohms
• Tolerance: ±1%
• Power rating: 1W
• Package: 2512 (6432 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Automotive qualification: AEC-Q200
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1

The ERJ-1TNF8450U meets all electrical and mechanical parameters required for direct substitution. This part differs only in product status (Not For New Designs) and the absence of anti-sulfur coating specification, which does not affect core electrical performance or package compatibility.

Parameter Comparison

Engineering Selection Recommendations

The ERJ-1TNF8450U is electrically and mechanically equivalent to the ERJ-S1TF8450U across all specified parameters. Selection between these parts should be based on the following criteria:

For new designs and active production programs, the ERJ-S1TF8450U is the preferred choice due to its active product status and anti-sulfur coating specification.

For existing designs or legacy applications where the ERJ-S1TF8450U becomes unavailable, the ERJ-1TNF8450U provides full functional equivalence. The higher inventory level (5024 units) of the ERJ-1TNF8450U may support extended production runs or supply chain continuity requirements.

Both parts maintain identical electrical performance, thermal characteristics, and automotive qualification standards. Package footprint and PCB assembly compatibility are identical.

Frequently Asked Questions (FAQ)

Q: Can ERJ-1TNF8450U be used as a direct replacement for ERJ-S1TF8450U in automotive applications?

A: Yes. Both parts meet AEC-Q200 automotive qualification, operate across the identical temperature range (-55°C ~ 155°C), and maintain equivalent electrical specifications (845 Ohms ±1%, 1W, ±100ppm/°C). The primary difference is product status; ERJ-1TNF8450U is designated Not For New Designs.

Q: What is the significance of the anti-sulfur coating on the ERJ-S1TF8450U?

A: The anti-sulfur coating is specified for the ERJ-S1TF8450U but not listed for the ERJ-1TNF8450U. Both parts are ROHS3 compliant and MSL 1 rated. The coating specification does not affect core electrical performance or package compatibility.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts use the 2512 (6432 Metric) package with identical dimensions: 0.252" L x 0.126" W (6.40mm x 3.20mm) and maximum seated height of 0.028" (0.70mm). PCB footprints are identical.

Q: What is the difference between ERJ-S1T and ERJ-1TN series designations?

A: These represent different product series within Panasonic's thick film resistor portfolio. The ERJ-S1T series (active) and ERJ-1TN series (not for new designs) share identical electrical and mechanical specifications for the 845 Ohm 1W 2512 package variant.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. Identical package dimensions, footprint, and electrical specifications enable direct PCB assembly interchange without design modification.