ASC1206-1KF1 Equivalent & Substitute Parts

Part Overview

The ASC1206-1KF1 is a 1 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Riedon. This component features anti-sulfur coating, automotive AEC-Q200 qualification, and moisture resistance, making it suitable for automotive and industrial applications requiring high reliability. The part is currently active in production with 6090 units in stock.

Substitute parts are necessary to address supply chain continuity, alternative sourcing options, and specific application requirements such as higher power ratings or different packaging formats.

Key Parameters

Parameter	Value
Resistance	1 kOhms
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
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ASC1206-1KF1 are classified based on the following critical parameters:

Direct Equivalents maintain identical electrical specifications: 1 kOhms resistance, ±1% tolerance, 0.25W power rating, 1206 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, and AEC-Q200 automotive qualification. These parts differ only in manufacturer, series designation, or packaging format (Tape & Reel versus Cut Tape).

Upgraded Variants increase the power rating to 0.75W (3/4W) while maintaining all other electrical and mechanical parameters. These are suitable for applications requiring higher power dissipation capability within the same package footprint.

Functional Equivalents maintain core electrical specifications but may omit specific features such as anti-sulfur coating or automotive qualification, depending on application requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Packaging Format	Inventory
ASC1206-1KF1	Riedon	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Tape & Reel	6090
RCA12061K00FKEA	Vishay Dale	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Tape & Reel	81694
RK73H2BRTTD1001F	KOA Speer Electronics	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Tape & Reel	15877
RCA12061K00FKEAHP	Vishay Dale	1 kOhms	±1%	0.75	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Tape & Reel	130925
AC1206FR-071KL	YAGEO	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Cut Tape & Digi-Reel	5300
CR1206-FX-1001ELF	Bourns Inc.	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	No	Cut Tape & Digi-Reel	36041
CRCW12061K00FKEA	Vishay Dale	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Cut Tape & Digi-Reel	60200
CRCW12061K00FKEAC	Vishay Dale	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	No	Tape & Reel	179461
CRCW12061K00FKEAHP	Vishay Dale	1 kOhms	±1%	0.75	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Cut Tape & Digi-Reel	52430
CRCW12061K00FKEB	Vishay Dale	1 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Cut Tape & Digi-Reel	39450

Engineering Selection Recommendations

For AEC-Q200 Automotive Applications: Select from RCA12061K00FKEA, RK73H2BRTTD1001F, AC1206FR-071KL, CRCW12061K00FKEA, CRCW12061K00FKEAHP, or CRCW12061K00FKEB. All maintain automotive qualification and are ROHS3 compliant with MSL 1 rating.

For Higher Power Dissipation: RCA12061K00FKEAHP and CRCW12061K00FKEAHP provide 0.75W rating in the same 1206 package while maintaining AEC-Q200 qualification and all other electrical parameters.

For Standard Industrial Applications: CR1206-FX-1001ELF and CRCW12061K00FKEAC are suitable alternatives when automotive qualification is not required. Both maintain core electrical specifications and ROHS3 compliance.

For Tape & Reel Packaging: RCA12061K00FKEA, RK73H2BRTTD1001F, RCA12061K00FKEAHP, and CRCW12061K00FKEAC are available in Tape & Reel format matching the original ASC1206-1KF1 packaging.

For Cut Tape & Digi-Reel Packaging: AC1206FR-071KL, CR1206-FX-1001ELF, CRCW12061K00FKEA, CRCW12061K00FKEAHP, and CRCW12061K00FKEB are available in alternative packaging formats suitable for different assembly processes.

Frequently Asked Questions (FAQ)

Q: Can I use CRCW12061K00FKEAC as a direct replacement for ASC1206-1KF1?

A: CRCW12061K00FKEAC is electrically and mechanically compatible with identical resistance, tolerance, power rating, package, and temperature specifications. However, it lacks AEC-Q200 automotive qualification. Use only in applications where automotive certification is not required.

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

A: The 0.75W variants (RCA12061K00FKEAHP and CRCW12061K00FKEAHP) have higher power dissipation capability within the same 1206 package footprint. Select 0.75W variants only if your circuit requires higher power handling; otherwise, 0.25W variants are appropriate.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original ASC1206-1KF1 specifications.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel and Cut Tape & Digi-Reel formats are packaging and delivery methods only. Electrical and mechanical specifications remain identical. Select based on assembly process requirements.

Q: Which substitute has the highest inventory availability?

A: CRCW12061K00FKEAC has the highest inventory at 179461 units. RCA12061K00FKEAHP has 130925 units. Both are suitable alternatives depending on your specific requirements.

Q: Can I substitute a non-AEC-Q200 part in an automotive circuit?

A: No. If your application requires AEC-Q200 qualification, use only parts explicitly rated for AEC-Q200: RCA12061K00FKEA, RK73H2BRTTD1001F, AC1206FR-071KL, CRCW12061K00FKEA, CRCW12061K00FKEAHP, or CRCW12061K00FKEB.

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