ERJ-S1DF42R2U Equivalent & Substitute Parts

Part Overview

The ERJ-S1DF42R2U is a 42.2 Ohms ±1% thick film chip resistor rated at 0.75W (3/4W) in a 2010 (5025 Metric) surface mount package. This component is manufactured by Panasonic Electronic Components and features anti-sulfur coating with AEC-Q200 automotive qualification. The part is currently in active production status. Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit selection from qualified alternatives with identical electrical and mechanical specifications.

Substiute Parts

ERJ-S1DF42R2U

Panasonic Electronic ComponentsIn Stock: 806ERJ-S1DF42R2U Datasheet

Current PartRFQ

ERJ-12SF42R2U

Panasonic Electronic ComponentsIn Stock: 3211ERJ-12SF42R2U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ERJ-S1DF42R2U is permitted with parts that maintain identical electrical and mechanical specifications across all critical parameters. The substitution logic is based strictly on the following criteria:

• Resistance value: 42.2 Ohms
• Tolerance: ±1%
• Power rating: 0.75W (3/4W)
• 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 Compliant
• Moisture sensitivity: MSL 1 (Unlimited)

The ERJ-12SF42R2U meets all these criteria and qualifies as a direct electrical and mechanical substitute.

Parameter Comparison

Engineering Selection Recommendations

The ERJ-S1DF42R2U is the preferred selection for new designs due to its active production status. The ERJ-12SF42R2U is electrically and mechanically equivalent and qualifies as a direct substitute when the primary part is unavailable. However, the ERJ-12SF42R2U carries a "Not For New Designs" status, indicating that Panasonic has transitioned this part to legacy support. For applications requiring long-term supply assurance and design continuity, the ERJ-S1DF42R2U should be specified. The ERJ-12SF42R2U may be used in existing designs or as a temporary alternative when supply of the primary part is constrained, provided that the design has been validated for this component.

Frequently Asked Questions (FAQ)

Q: Can ERJ-12SF42R2U be used as a direct replacement for ERJ-S1DF42R2U in production?

A: Yes. Both parts are identical in electrical performance (42.2 Ohms ±1%, 0.75W), mechanical dimensions (2010 package), temperature characteristics (±100ppm/°C, -55°C ~ 155°C), and automotive qualification (AEC-Q200). The primary difference is product status: ERJ-S1DF42R2U is active, while ERJ-12SF42R2U is not recommended for new designs.

Q: What is the significance of the "Not For New Designs" status on ERJ-12SF42R2U?

A: This designation indicates that Panasonic has discontinued active development and marketing of this part number. While the part remains functionally equivalent and available in inventory, new product designs should specify the active ERJ-S1DF42R2U to ensure long-term supply continuity and manufacturer support.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts measure 0.197" L x 0.098" W (5.00mm x 2.50mm) with a maximum seated height of 0.028" (0.70mm). They are mechanically interchangeable in PCB layouts designed for the 2010 (5025 Metric) package.

Q: Do both parts meet the same compliance and certification requirements?

A: Yes. Both ERJ-S1DF42R2U and ERJ-12SF42R2U are ROHS3 compliant, AEC-Q200 qualified for automotive applications, and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What packaging format is available for these parts?

A: Both parts are supplied in Tape & Reel (TR) format, suitable for automated assembly processes.