AF1206FR-07510RL Equivalent & Substitute Parts

Part Overview

The AF1206FR-07510RL is a 510 Ohm ±1% 0.25W (1/4W) thick film chip resistor in 1206 (3216 Metric) package manufactured by YAGEO. This part features anti-sulfur coating and automotive AEC-Q200 qualification, making it suitable for automotive and harsh environment applications. The part is currently active in production with 793 pieces in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design flexibility allows for functionally compatible alternatives from different manufacturers while maintaining electrical and mechanical specifications.

Key Parameters

Parameter	Value
Resistance	510 Ohms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the AF1206FR-07510RL is determined by strict equivalence across the following critical parameters:

Resistance Value: 510 Ohms (exact match required)
Tolerance: ±1% (exact match required)
Package / Case: 1206 (3216 Metric) (exact match required)
Power Rating: 0.25W (1/4W) for direct substitution; 0.75W (3/4W) acceptable as higher-rated alternative
Composition: Thick Film (exact match required)
Temperature Coefficient: ±100ppm/°C (exact match required)
Operating Temperature Range: -55°C ~ 155°C (exact match required)
Number of Terminations: 2 (exact match required)

Substitute parts are grouped into two categories:

Category 1: Direct Equivalents (Same Power Rating - 0.25W) Parts with identical electrical specifications, power rating, and package dimensions. These are interchangeable without circuit redesign.

Category 2: Higher-Rated Alternatives (0.75W Power Rating) Parts with identical electrical specifications but higher power dissipation capability. These provide enhanced thermal margin and are mechanically compatible within the 1206 package envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Temp Coeff	Op Temp Range	Size L x W (mm)	Height Max (mm)	RoHS Status	Product Status
AF1206FR-07510RL	YAGEO	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.10 x 1.60	0.65	ROHS3	Active
AC1206FR-07510RL	YAGEO	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.10 x 1.60	0.65	ROHS3	Active
RC1206FR-07510RL	YAGEO	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.10 x 1.60	0.65	ROHS3	Active
CR1206-FX-5100ELF	Bourns Inc.	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.20 x 1.60	0.75	ROHS3	Active
CRCW1206510RFKEA	Vishay Dale	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.20 x 1.60	0.60	ROHS3	Active
CRCW1206510RFKEAHP	Vishay Dale	510 Ω	±1%	0.75W	1206	±100ppm/°C	-55°C ~ 155°C	3.10 x 1.60	0.65	ROHS3	Active
CRCW1206510RFKTA	Vishay Dale	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.20 x 1.60	0.60	RoHS non-compliant	Active
ERJ-8ENF5100V	Panasonic Electronic Components	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.20 x 1.60	0.70	ROHS3	Not For New Designs
RC3216F511CS	Samsung Electro-Mechanics	510 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	3.20 x 1.60	0.65	ROHS3	Active

Engineering Selection Recommendations

Preferred Direct Equivalents (0.25W, Active Status, ROHS3 Compliant)

AC1206FR-07510RL (YAGEO) and RC1206FR-07510RL (YAGEO) are direct equivalents from the same manufacturer with identical electrical and mechanical specifications. Both are active products with ROHS3 compliance. AC1206FR-07510RL offers higher inventory availability (19,811 pieces).

CRCW1206510RFKEA (Vishay Dale) and RC3216F511CS (Samsung Electro-Mechanics) are functionally equivalent alternatives from established manufacturers, both with ROHS3 compliance and active product status.

Higher-Rated Alternative (0.75W, Active Status, ROHS3 Compliant)

CRCW1206510RFKEAHP (Vishay Dale) provides identical electrical specifications with 0.75W power rating, offering increased thermal margin. This part is suitable for applications requiring higher pulse withstanding capability or thermal headroom.

Parts Not Recommended for New Designs

CRCW1206510RFKTA (Vishay Dale) is active but RoHS non-compliant and REACH affected, making it unsuitable for new design implementations.

ERJ-8ENF5100V (Panasonic Electronic Components) carries "Not For New Designs" status and should not be selected for new applications despite ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I substitute AF1206FR-07510RL with AC1206FR-07510RL?

A: Yes. Both parts are YAGEO products with identical resistance (510 Ohms), tolerance (±1%), power rating (0.25W), package (1206), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C). The primary difference is packaging format: AF1206FR-07510RL uses Tape & Reel, while AC1206FR-07510RL uses Cut Tape & Digi-Reel. Both are ROHS3 compliant and active products.

Q: What is the difference between 0.25W and 0.75W rated parts?

A: Power rating indicates maximum continuous power dissipation capability. A 0.75W part (CRCW1206510RFKEAHP) can safely dissipate three times more power than a 0.25W part. In circuits where the actual power dissipation is below 0.25W, both parts function identically. The 0.75W variant provides thermal margin for high-stress applications or pulse conditions.

Q: Are there dimensional differences between substitute parts?

A: Yes. While all parts use the 1206 (3216 Metric) package designation, length and height vary slightly. AF1206FR-07510RL measures 3.10mm x 1.60mm with 0.65mm height. Some alternatives (CR1206-FX-5100ELF, CRCW1206510RFKEA, CRCW1206510RFKTA, ERJ-8ENF5100V, RC3216F511CS) measure 3.20mm x 1.60mm with heights ranging from 0.60mm to 0.75mm. These variations remain within standard 1206 package tolerances and are compatible with standard PCB footprints.

Q: Why is ERJ-8ENF5100V marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends against using this part in new product designs. While inventory exists and the part is ROHS3 compliant, it should only be used for legacy product support or maintenance applications.

Q: Which substitute offers the best inventory availability?

A: AC1206FR-07510RL (YAGEO) has the highest inventory with 19,811 pieces in stock, followed by CR1206-FX-5100ELF (Bourns Inc.) with 62,797 pieces and ERJ-8ENF5100V (Panasonic) with 50,529 pieces. For new designs, AC1206FR-07510RL or CR1206-FX-5100ELF are recommended based on availability and active product status.

Q: Are all substitute parts automotive qualified?

A: Not all. AF1206FR-07510RL, AC1206FR-07510RL, CRCW1206510RFKEA, CRCW1206510RFKEAHP, CRCW1206510RFKTA, and ERJ-8ENF5100V carry AEC-Q200 automotive qualification. RC1206FR-07510RL, CR1206-FX-5100ELF, and RC3216F511CS do not list AEC-Q200 rating. For automotive applications, select only AEC-Q200 qualified parts.

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