ESR03EZPJ4R3 Equivalent & Substitute Parts

Part Overview

The ESR03EZPJ4R3 is a 4.3 Ohm ±5% thick film chip resistor manufactured by Rohm Semiconductor in 0603 (1608 Metric) package format. This component is rated for 0.25W (1/4W) power dissipation and meets automotive AEC-Q200 qualification standards with pulse withstanding capability. The part is currently in active production status with 831 pieces available in inventory. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to supply constraints, design flexibility, or inventory availability.

Substiute Parts

ESR03EZPJ4R3

Rohm SemiconductorIn Stock: 872ESR03EZPJ4R3 Datasheet

Current PartRFQ

ERJ-PA3J4R3V

Panasonic Electronic ComponentsIn Stock: 10633ERJ-PA3J4R3V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ESR03EZPJ4R3 is determined by the following critical parameters:

• Resistance value: 4.3 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Package format: 0603 (1608 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: ±200ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• Automotive Qualification: AEC-Q200 (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The ERJ-PA3J4R3V qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The power rating differential (0.333W vs. 0.25W) represents a higher capability rating, which is acceptable in substitution applications where the original 0.25W specification is not exceeded in circuit operation.

Parameter Comparison

Engineering Selection Recommendations

Both the ESR03EZPJ4R3 and ERJ-PA3J4R3V are active production components with full AEC-Q200 automotive qualification and ROHS3 compliance. Selection between these parts should be based on:

• Supply availability and lead time requirements
• Inventory levels (ESR03EZPJ4R3: 831 pcs; ERJ-PA3J4R3V: 10,616 pcs)
• Manufacturer preference or qualification requirements
• Cost considerations

The ERJ-PA3J4R3V offers higher power rating capability (0.333W vs. 0.25W) while maintaining identical electrical characteristics and package dimensions, providing design flexibility for thermal margin applications.

Frequently Asked Questions (FAQ)

Q: Can ERJ-PA3J4R3V replace ESR03EZPJ4R3 in existing designs?

A: Yes. Both parts share identical resistance value (4.3 Ohms), tolerance (±5%), package format (0603), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. The higher power rating of the ERJ-PA3J4R3V (0.333W) does not create compatibility issues when the circuit operates within the original 0.25W specification.

Q: Are there physical dimension differences between these parts?

A: No. Both components have identical physical dimensions: 0.063" L x 0.031" W (1.60mm x 0.80mm) with maximum seated height of 0.022" (0.55mm). PCB footprints and assembly processes remain unchanged.

Q: What is the significance of the power rating difference?

A: The ERJ-PA3J4R3V has a higher power dissipation rating (0.333W vs. 0.25W). This represents increased thermal capability and does not affect substitution suitability when circuit power dissipation remains within the original 0.25W design specification.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the ESR03EZPJ4R3 and ERJ-PA3J4R3V are ROHS3 compliant, REACH unaffected, and carry AEC-Q200 automotive qualification with Moisture Sensitivity Level 1 (unlimited shelf life).

Q: What packaging format is used for both parts?

A: Both parts are supplied in Tape & Reel (TR) format in 0603 (1608 Metric) package configuration, compatible with standard SMD assembly equipment.