ERJ-S1DF44R2U Equivalent & Substitute Parts

Part Overview

The ERJ-S1DF44R2U is a 44.2 Ohm ±1% thick film chip resistor rated at 0.75W in a 2010 (5025 Metric) surface mount package. Manufactured by Panasonic Electronic Components, this component features anti-sulfur coating and automotive AEC-Q200 qualification, making it suitable for demanding automotive and industrial applications. The part is currently in active production status with 819 units in stock.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits component sourcing from alternative manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

ERJ-S1DF44R2U

Panasonic Electronic ComponentsIn Stock: 887ERJ-S1DF44R2U Datasheet

Current PartRFQ

ERJ-12SF44R2U

Panasonic Electronic ComponentsIn Stock: 9232ERJ-12SF44R2U Datasheet

SimilarRFQ

CRCW201044R2FKEF

Vishay DaleIn Stock: 9220CRCW201044R2FKEF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S1DF44R2U is determined by strict equivalence across the following critical parameters:

• Resistance value: 44.2 Ohms
• 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 substitute parts meet these parameters without exception. Substitution is valid across manufacturers (Panasonic and Vishay Dale) and product series (ERJ-S1D, ERJ-12S, CRCW) provided these electrical and mechanical specifications remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

ERJ-S1DF44R2U (Primary Part): Active production status with anti-sulfur coating feature. Recommended for new designs requiring Panasonic sourcing or when anti-sulfur specification is explicitly required.

ERJ-12SF44R2U (Panasonic Alternative): Marked as "Not For New Designs." This part is electrically and mechanically equivalent but should be used only for legacy system maintenance, repair, or when existing inventory must be consumed. New design implementations should avoid this part number.

CRCW201044R2FKEF (Vishay Dale Alternative): Active production status. Provides cross-manufacturer substitution capability with identical electrical and mechanical specifications. Suitable for new designs when Vishay Dale sourcing is preferred or when supply chain diversification is required.

All three parts satisfy automotive AEC-Q200 qualification and ROHS3 compliance requirements. Selection between active parts (ERJ-S1DF44R2U and CRCW201044R2FKEF) depends on manufacturer preference, supply availability, and existing qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can ERJ-12SF44R2U be used in new designs? A: No. ERJ-12SF44R2U carries "Not For New Designs" status. It is suitable only for maintenance and repair of existing systems. New designs must use ERJ-S1DF44R2U or CRCW201044R2FKEF.

Q: Are all substitute parts pin-compatible? A: Yes. All parts use the 2010 (5025 Metric) package with identical footprint, lead spacing, and termination configuration. PCB layout modifications are not required.

Q: What is the difference between ERJ-S1DF44R2U and ERJ-12SF44R2U? A: Both are Panasonic 44.2 Ohm ±1% 0.75W thick film resistors in 2010 package. The primary difference is product status: ERJ-S1DF44R2U is active, while ERJ-12SF44R2U is not recommended for new designs. ERJ-S1DF44R2U includes anti-sulfur coating.

Q: Can CRCW201044R2FKEF replace ERJ-S1DF44R2U in automotive applications? A: Yes. CRCW201044R2FKEF meets all electrical, mechanical, and automotive qualification requirements (AEC-Q200, ROHS3, MSL 1) identical to ERJ-S1DF44R2U. Cross-manufacturer substitution is valid.

Q: Are there any temperature or environmental limitations when substituting parts? A: No. All substitute parts share identical operating temperature range (-55°C ~ 155°C), temperature coefficient (±100ppm/°C), and moisture sensitivity rating (MSL 1). Environmental performance is equivalent.

Q: What is the significance of anti-sulfur coating on ERJ-S1DF44R2U? A: Anti-sulfur coating is a feature of ERJ-S1DF44R2U not explicitly listed for the other substitutes. If anti-sulfur specification is a design requirement, ERJ-S1DF44R2U must be used. For applications without this requirement, all three parts are functionally equivalent.