ERJ-S1DF4221U Equivalent & Substitute Parts

Part Overview

The ERJ-S1DF4221U is a 4.22 kOhms ±1% 0.75W chip resistor in 2010 (5025 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 769 units in stock.

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or design flexibility within the same electrical and mechanical specifications.

Substiute Parts

ERJ-S1DF4221U

Panasonic Electronic ComponentsIn Stock: 791ERJ-S1DF4221U Datasheet

Current PartRFQ

ERJ-12SF4221U

Panasonic Electronic ComponentsIn Stock: 6507ERJ-12SF4221U Datasheet

SimilarRFQ

CRCW20104K22FKEF

Vishay DaleIn Stock: 5033CRCW20104K22FKEF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ERJ-S1DF4221U are qualified based on strict equivalence across the following critical parameters:

• Resistance value: 4.22 kOhms
• Tolerance: ±1%
• Power rating: 0.75W
• Package: 2010 (5025 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Automotive qualification: AEC-Q200
• RoHS compliance: ROHS3
• Moisture sensitivity: MSL 1

All identified substitutes meet these parameters without exception. Differences in product status, manufacturer, or series designation do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

ERJ-S1DF4221U (Primary Selection)

This part maintains active production status and includes anti-sulfur coating, providing enhanced reliability in corrosive environments. Recommended for new designs requiring long-term supply assurance and maximum environmental protection.

ERJ-12SF4221U (Alternative - Panasonic)

This part is designated "Not For New Designs" by the manufacturer. While electrically and mechanically equivalent, it is suitable only for legacy system maintenance, repair, or applications where design freeze has been established. Higher inventory availability (6468 units) may support high-volume legacy production requirements.

CRCW20104K22FKEF (Alternative - Vishay Dale)

This part maintains active production status and provides cross-manufacturer equivalence. Suitable for applications requiring dual-source qualification or when Panasonic supply is constrained. Inventory level (4999 units) supports standard production volumes.

Frequently Asked Questions (FAQ)

Q: Can ERJ-12SF4221U be used in new product designs?

A: No. The ERJ-12SF4221U is designated "Not For New Designs" by Panasonic. It is suitable only for maintenance, repair, or legacy production of established designs. New designs should use ERJ-S1DF4221U or CRCW20104K22FKEF.

Q: Are all three parts mechanically interchangeable?

A: Yes. All three parts use the 2010 (5025 Metric) package with identical dimensions (0.197" L x 0.098" W, 0.028" maximum seated height). They are directly interchangeable on PCB layouts without modification.

Q: What is the significance of the anti-sulfur feature in ERJ-S1DF4221U?

A: The anti-sulfur coating in ERJ-S1DF4221U provides enhanced resistance to sulfur-containing environments, common in automotive and industrial applications. ERJ-12SF4221U does not include this feature. CRCW20104K22FKEF specifications do not indicate anti-sulfur coating.

Q: Do all substitutes meet automotive qualification requirements?

A: Yes. All three parts carry AEC-Q200 automotive qualification, RoHS3 compliance, and MSL 1 rating, meeting automotive and high-reliability application standards.

Q: What is the difference between ERJ-S1D and ERJ-12S series designations?

A: Series designation reflects internal Panasonic product line classification. Both series are electrically and mechanically equivalent for this resistance value and package. Series differences do not affect substitution compatibility.

Q: Can CRCW20104K22FKEF replace ERJ-S1DF4221U in automotive applications?

A: Yes. CRCW20104K22FKEF meets all electrical, mechanical, and compliance requirements including AEC-Q200 qualification. It is suitable for automotive applications as a direct substitute.