ERJ-S1DF6493U Equivalent & Substitute Parts

Part Overview

The ERJ-S1DF6493U is a 649 kOhms ±1% 0.75W chip resistor in 2010 (5025 Metric) package manufactured by Panasonic Electronic Components. This thick film resistor features anti-sulfur coating and automotive AEC-Q200 qualification, designed for high-reliability applications in automotive and industrial environments. The part is currently in active production status with ROHS3 compliance.

Substitute parts are necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements permit selection from qualified alternative manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	649 kOhms
Tolerance	±1%
Power Rating	0.75W (3/4W)
Package / Case	2010 (5025 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Automotive Rating	AEC-Q200
Size / Dimension	0.197" L x 0.098" W (5.00mm x 2.50mm)
Height - Seated (Max)	0.028" (0.70mm)
Terminations	2
Packaging Format	Tape & Reel (TR)

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S1DF6493U is determined by strict equivalence across the following critical parameters:

Resistance value: 649 kOhms
Tolerance: ±1%
Power rating: 0.75W
Package type: 2010 (5025 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Automotive qualification: AEC-Q200
Physical dimensions and termination count

All substitute parts listed meet these electrical and mechanical requirements, enabling direct replacement in circuit designs without modification to PCB layout or schematic topology.

Parameter Comparison

Parameter	ERJ-S1DF6493U (Panasonic)	ERJ-12SF6493U (Panasonic)	RMCF2010FT649K (Stackpole)
Resistance	649 kOhms	649 kOhms	649 kOhms
Tolerance	±1%	±1%	±1%
Power Rating	0.75W	0.75W	0.75W
Package / Case	2010 (5025 Metric)	2010 (5025 Metric)	2010 (5025 Metric)
Composition	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
AEC-Q200 Rating	Yes	Yes	Yes
Size / Dimension	0.197" L x 0.098" W (5.00mm x 2.50mm)	0.197" L x 0.098" W (5.00mm x 2.50mm)	0.197" L x 0.098" W (5.00mm x 2.50mm)
Height - Seated (Max)	0.028" (0.70mm)	0.028" (0.70mm)	0.028" (0.70mm)
Terminations	2	2	2
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Active	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection: ERJ-S1DF6493U (Panasonic)

The ERJ-S1DF6493U is the recommended primary choice for new designs. It maintains active production status, ROHS3 compliance, and anti-sulfur coating for enhanced reliability in corrosive environments. Current inventory of 1,103 pieces supports immediate procurement.

Secondary Selection: RMCF2010FT649K (Stackpole)

The RMCF2010FT649K from Stackpole Electronics Inc is a qualified alternative for applications where multi-source qualification is required. This part is in active production with ROHS3 compliance and maintains identical electrical and mechanical specifications. Significantly higher inventory availability (26,388 pieces) provides supply chain flexibility.

Not Recommended for New Designs: ERJ-12SF6493U (Panasonic)

The ERJ-12SF6493U is designated "Not For New Designs" and carries RoHS non-compliance status. While electrically and mechanically equivalent, this part should be reserved for legacy system maintenance or repair applications only. Use of this part in new designs is not supported.

Frequently Asked Questions (FAQ)

Q: Can ERJ-S1DF6493U be directly replaced with RMCF2010FT649K on the PCB?

A: Yes. Both parts share identical electrical specifications (649 kOhms ±1%, 0.75W, ±100ppm/°C, -55°C to 155°C), composition (thick film), package type (2010/5025 Metric), physical dimensions (0.197" L x 0.098" W, 0.028" max height), and AEC-Q200 automotive qualification. No PCB layout modification is required.

Q: What is the difference between ERJ-S1DF6493U and ERJ-12SF6493U?

A: The primary differences are product status and compliance. ERJ-S1DF6493U is active production with ROHS3 compliance and anti-sulfur coating. ERJ-12SF6493U is marked "Not For New Designs" and is RoHS non-compliant. Electrical and mechanical parameters are identical.

Q: Why is ERJ-12SF6493U listed as a substitute if it is not recommended for new designs?

A: ERJ-12SF6493U is included for reference and legacy system support. It meets all electrical and mechanical substitution criteria but should not be selected for new product development due to its discontinued status and non-compliance with current environmental regulations.

Q: Are there any thermal or environmental performance differences between these parts?

A: All three parts operate across the identical temperature range (-55°C to 155°C) with the same temperature coefficient (±100ppm/°C). The ERJ-S1DF6493U includes anti-sulfur coating for enhanced corrosion resistance in harsh environments. This feature is not specified for the other variants.

Q: What packaging format is used for these resistors?

A: All substitute parts are supplied in Tape & Reel (TR) format, standard for automated PCB assembly. The 2010 (5025 Metric) package accommodates standard pick-and-place equipment without special handling requirements.

Q: Are these parts suitable for automotive applications?

A: Yes. All three parts carry AEC-Q200 automotive qualification, meeting reliability and performance standards for automotive-grade electronic components. Operating temperature range (-55°C to 155°C) and composition specifications support automotive environmental conditions.

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