AC2512FK-07300RL Equivalent & Substitute Parts

Part Overview

The AC2512FK-07300RL is a 300 Ohms ±1% 1W thick film chip resistor in 2512 (6432 Metric) package manufactured by YAGEO. This automotive-grade component meets AEC-Q200 qualification and features moisture-resistant construction, making it suitable for demanding automotive and industrial applications operating across -55°C to 155°C. The part is currently in active production status with 1026 units in stock.

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified manufacturers offering identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Resistance Value	300 Ohms
Tolerance	±1%
Power Rating	1W
Package / Case	2512 (6432 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Automotive Rating	AEC-Q200
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AC2512FK-07300RL is determined by strict equivalence across the following critical parameters:

Resistance value: 300 Ohms
Tolerance: ±1%
Power rating: 1W (primary criterion)
Package: 2512 (6432 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Automotive qualification: AEC-Q200
Moisture sensitivity level: 1 (Unlimited)
RoHS compliance: ROHS3

Parts are grouped into two categories:

Direct Equivalents (1W Rating): RC2512FK-07300RL, CRCW2512300RFKEG, ERJ-1TNF3000U, and RMCF2512FT300R meet all electrical and mechanical specifications identically to the main part.

Upgrade Substitute (2W Rating): 3521300RFT is a manufacturer-recommended substitute that exceeds the power rating specification (2W vs. 1W) while maintaining all other parameters. This part is suitable only when the application permits higher power dissipation capability without circuit redesign.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Packaging Type
AC2512FK-07300RL	YAGEO	300 Ω	±1%	1W	2512	±100ppm/°C	-55°C ~ 155°C	Yes	Active	Tape & Reel
RC2512FK-07300RL	YAGEO	300 Ω	±1%	1W	2512	±100ppm/°C	-55°C ~ 155°C	No	Active	Tape & Reel
CRCW2512300RFKEG	Vishay Dale	300 Ω	±1%	1W	2512	±100ppm/°C	-55°C ~ 155°C	Yes	Active	Tape & Reel
ERJ-1TNF3000U	Panasonic Electronic Components	300 Ω	±1%	1W	2512	±100ppm/°C	-55°C ~ 155°C	Yes	Not For New Designs	Tape & Reel
RMCF2512FT300R	Stackpole Electronics Inc	300 Ω	±1%	1W	2512	±100ppm/°C	-55°C ~ 155°C	Yes	Active	Cut Tape
3521300RFT	TE Connectivity Passive Product	300 Ω	±1%	2W	2512	±100ppm/°C	-55°C ~ 155°C	Yes	Active	Tape & Reel

Engineering Selection Recommendations

For Direct Substitution (1W Equivalents):

RC2512FK-07300RL, CRCW2512300RFKEG, and RMCF2512FT300R are fully qualified direct substitutes. Selection among these parts should prioritize active product status and supply availability. CRCW2512300RFKEG (Vishay Dale) and RMCF2512FT300R (Stackpole Electronics) both maintain active status with substantial inventory. RC2512FK-07300RL (YAGEO) is also active and offers the advantage of same-manufacturer sourcing.

ERJ-1TNF3000U (Panasonic) meets all electrical and mechanical specifications but carries "Not For New Designs" status, limiting its use to legacy system maintenance or existing production lines where qualification history is established.

For Upgraded Substitution (2W Rating):

3521300RFT (TE Connectivity) is a manufacturer-recommended upgrade option that provides increased power dissipation capability (2W vs. 1W) within the identical 2512 package footprint. This part is suitable only when circuit design permits the higher power rating without modification. All other parameters remain equivalent to the main part.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, AEC-Q200 automotive qualification (except RC2512FK-07300RL which lacks AEC-Q200 rating), and MSL 1 moisture sensitivity level. Selection should confirm that the chosen substitute meets the specific automotive or industrial certification requirements of the end application.

Frequently Asked Questions (FAQ)

Q: Can RC2512FK-07300RL replace AC2512FK-07300RL in automotive applications?

A: RC2512FK-07300RL is electrically and mechanically equivalent but does not carry AEC-Q200 automotive qualification. Use only if the application does not require AEC-Q200 certification or if existing qualification history permits substitution.

Q: What is the difference between the 1W and 2W versions?

A: The 3521300RFT provides 2W power rating versus 1W for all other parts. Both fit the 2512 package. The 2W version is suitable only when the circuit design permits higher power dissipation without modification.

Q: Are there packaging differences between substitute parts?

A: RMCF2512FT300R is supplied in Cut Tape (CT) packaging, while all other parts use Tape & Reel (TR) packaging. Verify packaging compatibility with assembly equipment and procurement requirements.

Q: Why is ERJ-1TNF3000U marked "Not For New Designs"?

A: This designation indicates the part is in mature or declining production status. It remains available for existing designs and legacy system support but should not be selected for new product development.

Q: Are all substitute parts qualified for -55°C to 155°C operation?

A: Yes. All listed substitute parts maintain the full operating temperature range of -55°C to 155°C with ±100ppm/°C temperature coefficient, matching the main part specification.

Q: Can I mix different manufacturers in the same production run?

A: Yes, provided all selected parts meet the required electrical, mechanical, and compliance specifications. Verify with your quality and procurement departments regarding multi-source qualification requirements.

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