ERJ-S02J3R9X Equivalent & Substitute Parts

Part Overview

The ERJ-S02J3R9X is a 3.9 Ohms ±5% 0.1W chip resistor manufactured by Panasonic Electronic Components in the 0402 (1005 Metric) package. This thick film resistor features anti-sulfur properties and automotive AEC-Q200 qualification, making it suitable for automotive and industrial applications requiring reliable performance across extended temperature ranges. The part is currently active in production with 652 pieces available in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

ERJ-S02J3R9X

Panasonic Electronic ComponentsIn Stock: 722ERJ-S02J3R9X Datasheet

Current PartRFQ

ERJ-U02J3R9X

Panasonic Electronic ComponentsIn Stock: 8847ERJ-U02J3R9X Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ERJ-S02J3R9X is permissible when the replacement part maintains identical electrical and mechanical specifications. The critical parameters governing substitution are:

• Resistance Value: 3.9 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power Rating: 0.1W / 1/10W (exact match required)
• Package: 0402 (1005 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Features: Anti-Sulfur, Automotive AEC-Q200 (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• Temperature Coefficient: -100 / +600 ppm/°C (exact match required)

The ERJ-U02J3R9X qualifies as a direct substitute because it meets all specified electrical and mechanical parameters. The primary difference between the main part and substitute is the series designation (ERJ-S02 versus ERJ-U02), which reflects internal manufacturing or design revision changes within Panasonic's product line while maintaining full functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The ERJ-U02J3R9X is a fully qualified substitute for the ERJ-S02J3R9X in all applications where the main part is specified. Both parts are manufactured by Panasonic Electronic Components and maintain identical electrical performance, mechanical dimensions, and compliance certifications.

Compliance and Certification Alignment:

• Both parts carry AEC-Q200 automotive qualification
• Both are ROHS3 compliant
• Both maintain REACH Unaffected status
• Both feature identical moisture sensitivity classification (MSL 1)

Inventory Consideration: The ERJ-U02J3R9X maintains significantly higher stock availability (8,768 pieces) compared to the ERJ-S02J3R9X (652 pieces), making it the preferred selection when supply continuity is a design consideration.

Application Compatibility: The substitute part is suitable for direct replacement in automotive, industrial, and consumer electronics applications requiring 3.9 Ohm resistors with automotive-grade reliability and anti-sulfur protection across the -55°C to 155°C operating range.

Frequently Asked Questions (FAQ)

Q: Can the ERJ-U02J3R9X be used as a direct replacement for the ERJ-S02J3R9X?

A: Yes. The ERJ-U02J3R9X meets all electrical and mechanical specifications of the ERJ-S02J3R9X, including resistance value, tolerance, power rating, package dimensions, temperature range, and automotive AEC-Q200 qualification. The parts are functionally equivalent.

Q: What is the difference between the ERJ-S02 and ERJ-U02 series?

A: The series designation reflects internal Panasonic product line differentiation. Both series maintain identical performance characteristics for the 3.9 Ohm ±5% 0.1W 0402 package configuration specified in this comparison.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the ERJ-S02J3R9X and ERJ-U02J3R9X carry AEC-Q200 automotive qualification and feature anti-sulfur protection, making them suitable for automotive-grade applications.

Q: Do the parts have identical physical dimensions?

A: Yes. Both parts are packaged in the 0402 (1005 Metric) case with identical length (0.039" / 1.00mm), width (0.020" / 0.50mm), and maximum seated height (0.016" / 0.40mm).

Q: What is the moisture sensitivity level for these parts?

A: Both parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are both parts RoHS compliant?

A: Yes. Both the ERJ-S02J3R9X and ERJ-U02J3R9X are ROHS3 compliant and REACH unaffected.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. The identical 0402 package dimensions, termination configuration, and electrical specifications allow direct PCB layout and assembly interchangeability.