ERJ-S03F4020V Equivalent & Substitute Parts

Part Overview

The ERJ-S03F4020V is a 402 Ohm ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Panasonic Electronic Components. This component features anti-sulfur coating and automotive AEC-Q200 qualification, designed for automotive and industrial applications requiring high reliability in harsh environments. The part is currently active in production with 730 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when supply chain optimization demands component standardization across multiple qualified suppliers.

Key Parameters

Parameter	Value
Resistance	402 Ohms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S03F4020V is determined by strict equivalence across the following critical parameters:

Resistance value: 402 Ohms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package designation: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Automotive qualification: AEC-Q200

All substitute parts listed meet these core electrical and mechanical requirements. Variations in packaging format (Tape & Reel versus Cut Tape), physical dimensions within tolerance, and manufacturer-specific features do not affect functional equivalence. RoHS compliance status and REACH classification are noted for regulatory compliance verification but do not preclude substitution where applicable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	AEC-Q200	RoHS3	Packaging Format	Inventory (Pcs)
ERJ-S03F4020V	Panasonic	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Yes	Yes	Tape & Reel	730
ERJ-3EKF4020V	Panasonic	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Yes	Yes	Tape & Reel	384,345
AC0603FR-07402RL	YAGEO	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Yes	Yes	Tape & Reel	52,135
CRCW0603402RFKEA	Vishay Dale	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Yes	Yes	Cut Tape & Digi-Reel	24,964
CRCW0603402RFKTA	Vishay Dale	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Yes	No	Tape & Reel	7,647
RC0603FR-07402RL	YAGEO	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	No	Yes	Tape & Reel	10,300
RMCF0603FG402R	Stackpole Electronics	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Yes	Yes	Cut Tape	39,088
RMCF0603FT402R	Stackpole Electronics	402 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Yes	Yes	Tape & Reel	101,047

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical equivalence to the ERJ-S03F4020V. Selection among qualified alternatives should be based on the following criteria:

For AEC-Q200 automotive applications requiring ROHS3 compliance: ERJ-3EKF4020V, AC0603FR-07402RL, CRCW0603402RFKEA, RMCF0603FG402R, and RMCF0603FT402R are fully qualified. The ERJ-3EKF4020V offers the highest inventory availability (384,345 units) and maintains Panasonic manufacturing continuity. RMCF0603FT402R provides the largest stock position (101,047 units) among Stackpole alternatives.

For packaging format requirements: Tape & Reel format is available from Panasonic (ERJ-3EKF4020V), YAGEO (AC0603FR-07402RL, RC0603FR-07402RL), and Stackpole (RMCF0603FT402R). Cut Tape format is available from Vishay Dale (CRCW0603402RFKEA) and Stackpole (RMCF0603FG402R).

For non-automotive applications where AEC-Q200 is not required: RC0603FR-07402RL provides a ROHS3-compliant alternative with moisture-resistant characteristics and adequate inventory (10,300 units).

For legacy designs or REACH-affected applications: CRCW0603402RFKTA is available but carries REACH Affected status and lacks ROHS3 compliance; use only where existing design qualifications explicitly permit.

Frequently Asked Questions (FAQ)

Q: Can ERJ-3EKF4020V be used as a direct replacement for ERJ-S03F4020V?

A: Yes. Both parts share identical electrical specifications (402 Ω ±1%, 0.1W, ±100ppm/°C), operate across the same temperature range (-55°C to 155°C), carry AEC-Q200 qualification, and are packaged in 0603 (1608 Metric) format. The primary difference is the series designation (ERJ-3EK versus ERJ-S03) and anti-sulfur coating on the ERJ-S03F4020V. Both are ROHS3 compliant.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly equipment. Cut Tape packaging is supplied in smaller quantities on cut segments of carrier tape, typically for manual assembly or lower-volume production. Both formats contain identical components; selection depends on manufacturing process requirements.

Q: Are YAGEO AC0603FR-07402RL and RC0603FR-07402RL interchangeable?

A: Both parts meet the core electrical requirements (402 Ω ±1%, 0.1W, ±100ppm/°C, 0603 package). AC0603FR-07402RL carries AEC-Q200 automotive qualification and moisture-resistant features. RC0603FR-07402RL lacks AEC-Q200 rating but includes moisture-resistant characteristics. For automotive applications, AC0603FR-07402RL is the appropriate selection.

Q: Why does CRCW0603402RFKTA show RoHS non-compliant status?

A: CRCW0603402RFKTA is marked as RoHS non-compliant and REACH Affected. This part should be used only in applications where existing design qualifications explicitly permit non-compliant components or where regulatory exemptions apply. For new designs, ROHS3-compliant alternatives are recommended.

Q: Can I mix different manufacturers' parts in the same assembly?

A: Yes, provided all selected parts meet the required electrical specifications, package format, and applicable certifications (AEC-Q200, ROHS3, REACH status). Mixing manufacturers is common practice for supply chain resilience. Verify that all parts meet your design's specific compliance requirements before implementation.

Q: What does ±100ppm/°C temperature coefficient mean for circuit performance?

A: Temperature coefficient specifies resistance change per degree Celsius. At ±100ppm/°C, a 402 Ω resistor will change by approximately 0.04 Ω per °C. Across the full operating range (-55°C to 155°C, a 210°C span), maximum resistance drift is approximately 8.4 Ω or 2.1% of nominal value. This specification is identical across all listed parts.

Q: Is anti-sulfur coating on the ERJ-S03F4020V critical for my application?

A: Anti-sulfur coating protects against sulfur-induced corrosion in high-sulfur environments, particularly relevant for automotive and industrial applications in regions with high atmospheric sulfur content. If your application operates in controlled environments without sulfur exposure, non-coated alternatives (such as ERJ-3EKF4020V) provide equivalent electrical performance. Verify environmental exposure requirements before substitution.

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