Equivalent & Substitute Parts for ERJ-S1DF2490U

Part Overview

The ERJ-S1DF2490U is a 249 Ohm ±1% thick film chip resistor rated at 0.75W in a 2010 (5025 Metric) surface mount package. Manufactured by Panasonic Electronic Components, this resistor features anti-sulfur coating and automotive AEC-Q200 qualification, making it suitable for demanding automotive and industrial applications operating across -55°C to 155°C.

The product maintains active status with 762 units in current inventory. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating, temperature coefficient) and mechanical compatibility (package size, termination count, height).

Key Parameters

Parameter	Value
Resistance	249 Ohms
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 to 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S1DF2490U is determined by strict equivalence across the following parameters:

Resistance value: 249 Ohms
Tolerance: ±1%
Power rating: 0.75W
Package: 2010 (5025 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Termination count: 2
RoHS compliance: ROHS3 Compliant
MSL rating: 1 (Unlimited)

All identified substitute parts meet these core electrical and mechanical requirements. Variations in specific features (such as anti-sulfur coating or automotive qualification) do not preclude substitution but may affect suitability for particular applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	Height (Max)	Product Status	AEC-Q200
ERJ-S1DF2490U	Panasonic	249 Ω	±1%	0.75	2010	±100ppm/°C	-55 to 155°C	0.70mm	Active	Yes
ERJ-12SF2490U	Panasonic	249 Ω	±1%	0.75	2010	±100ppm/°C	-55 to 155°C	0.70mm	Not For New Designs	Yes
CRCW2010249RFKEF	Vishay Dale	249 Ω	±1%	0.75	2010	±100ppm/°C	-55 to 155°C	0.70mm	Active	Yes
RC2010FK-07249RL	YAGEO	249 Ω	±1%	0.75	2010	±100ppm/°C	-55 to 155°C	0.65mm	Active	No
RMCF2010FT249R	Stackpole Electronics Inc	249 Ω	±1%	0.75	2010	±100ppm/°C	-55 to 155°C	0.70mm	Active	Yes

Engineering Selection Recommendations

For applications requiring automotive qualification and AEC-Q200 compliance, the CRCW2010249RFKEF (Vishay Dale) and RMCF2010FT249R (Stackpole Electronics Inc) are preferred substitutes, as both maintain active product status and full automotive certification equivalent to the primary part.

The RC2010FK-07249RL (YAGEO) provides electrical and mechanical equivalence with slightly reduced maximum height (0.65mm vs 0.70mm) and does not carry AEC-Q200 rating. This part is suitable for non-automotive applications where automotive qualification is not required.

The ERJ-12SF2490U (Panasonic) is electrically and mechanically equivalent but carries "Not For New Designs" status, limiting its use to legacy system support or replacement scenarios only.

Frequently Asked Questions (FAQ)

Q: Can I substitute ERJ-S1DF2490U with any of these parts in automotive applications?

A: For automotive applications requiring AEC-Q200 compliance, use CRCW2010249RFKEF, RMCF2010FT249R, or ERJ-12SF2490U. The RC2010FK-07249RL lacks AEC-Q200 certification and is not suitable for automotive use.

Q: What is the significance of the "Not For New Designs" status on ERJ-12SF2490U?

A: This designation indicates the part is in mature/legacy phase. While electrically and mechanically equivalent, it should only be used for replacement in existing designs or legacy system support, not for new product development.

Q: Are there height differences between substitute parts?

A: Yes. The RC2010FK-07249RL has a maximum seated height of 0.65mm, while ERJ-S1DF2490U, ERJ-12SF2490U, CRCW2010249RFKEF, and RMCF2010FT249R all have 0.70mm maximum height. Verify PCB clearance requirements before substitution.

Q: Do all substitute parts have the same moisture sensitivity rating?

A: Yes. All parts listed carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: What distinguishes ERJ-S1DF2490U from ERJ-12SF2490U?

A: Both are Panasonic 249 Ohm ±1% 0.75W 2010 package resistors with identical electrical specifications. The primary difference is product lifecycle status: ERJ-S1DF2490U is active, while ERJ-12SF2490U is not recommended for new designs. The ERJ-S1DF2490U includes anti-sulfur coating as an additional feature.

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