Equivalent & Substitute Parts for RMCS1206FT100K

Part Overview

The RMCS1206FT100K is a 100 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This anti-sulfur resistor operates across -55°C to 155°C and is ROHS3 compliant with unlimited moisture sensitivity rating. The part is currently active in production with 1026 units in stock.

Substitute parts are necessary when the original RMCS1206FT100K becomes unavailable, when design requirements demand enhanced features such as automotive qualification or pulse withstanding capability, or when supply chain optimization requires alternative qualified sources from manufacturers including Stackpole, YAGEO, Bourns, Vishay Dale, and Panasonic.

Key Parameters

Parameter	Value
Resistance	100 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the RMCS1206FT100K is determined by strict equivalence across the following parameters: resistance value (100 kOhms), tolerance (±1%), package type (1206 / 3216 Metric), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and termination count (2). All substitute parts listed maintain these core electrical and mechanical specifications.

Substitute parts are grouped into two categories based on power rating and additional features:

Category 1: Direct Equivalents (0.25W / 1/4W Rating) Parts with identical 0.25W power rating and standard thick film construction: RMCF1206FT100K, AF1206FR-07100KL, AC1206FR-07100KL, CHV1206-FX-1003ELF, CR1206-FX-1003ELF, CRCW1206100KFKEA, CRCW1206100KFKTA, ERJ-8ENF1003V.

Category 2: Enhanced Power Rating (0.75W / 3/4W or 0.667W / 2/3W) Parts with increased power dissipation capability: CRCW1206100KFKEAHP (0.75W), ERJ-P08F1003V (0.667W).

All parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Differences in features (automotive AEC-Q200, anti-sulfur, moisture resistant, high voltage, pulse withstanding) and packaging format (Tape & Reel vs. Cut Tape) do not affect electrical substitutability but may influence application suitability.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff	Op Temp Range	Package	Features	RoHS Status	Product Status
RMCS1206FT100K	Stackpole	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Anti-Sulfur	ROHS3	Active
RMCF1206FT100K	Stackpole	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Automotive AEC-Q200	ROHS3	Active
AF1206FR-07100KL	YAGEO	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Anti-Sulfur, Automotive AEC-Q200	ROHS3	Active
AC1206FR-07100KL	YAGEO	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Automotive AEC-Q200, Moisture Resistant	ROHS3	Active
CHV1206-FX-1003ELF	Bourns	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	High Voltage	ROHS3	Active
CR1206-FX-1003ELF	Bourns	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Moisture Resistant	ROHS3	Active
CRCW1206100KFKEA	Vishay Dale	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Automotive AEC-Q200	ROHS3	Active
CRCW1206100KFKEAHP	Vishay Dale	100k	±1%	0.75	±100ppm/°C	-55~155°C	1206	Automotive AEC-Q200, Pulse Withstanding	ROHS3	Active
CRCW1206100KFKTA	Vishay Dale	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Automotive AEC-Q200	RoHS non-compliant	Active
ERJ-8ENF1003V	Panasonic	100k	±1%	0.25	±100ppm/°C	-55~155°C	1206	Automotive AEC-Q200	ROHS3	Not For New Designs
ERJ-P08F1003V	Panasonic	100k	±1%	0.667	±100ppm/°C	-55~155°C	1206	Automotive AEC-Q200, Pulse Withstanding	ROHS3	Active

Engineering Selection Recommendations

For ROHS3 Compliant Applications: RMCF1206FT100K, AF1206FR-07100KL, AC1206FR-07100KL, CHV1206-FX-1003ELF, CR1206-FX-1003ELF, CRCW1206100KFKEA, CRCW1206100KFKEAHP, and ERJ-P08F1003V all maintain ROHS3 compliance. CRCW1206100KFKTA is RoHS non-compliant and unsuitable for applications requiring regulatory compliance.

For Automotive Applications: RMCF1206FT100K, AF1206FR-07100KL, AC1206FR-07100KL, CRCW1206100KFKEA, CRCW1206100KFKEAHP, CRCW1206100KFKTA, ERJ-8ENF1003V, and ERJ-P08F1003V carry AEC-Q200 automotive qualification. These parts are suitable for automotive-grade circuit designs.

For New Designs: ERJ-8ENF1003V is designated "Not For New Designs" and should not be selected for new product development. All other listed parts are active and suitable for new designs.

For Enhanced Power Dissipation: CRCW1206100KFKEAHP (0.75W) and ERJ-P08F1003V (0.667W) provide increased power ratings compared to the 0.25W original specification. These parts are electrically substitutable but deliver higher power handling capability.

For Pulse Withstanding Applications: CRCW1206100KFKEAHP and ERJ-P08F1003V include pulse withstanding features and are suitable for circuits experiencing transient overvoltage conditions.

Frequently Asked Questions (FAQ)

Q: Can I substitute CRCW1206100KFKEAHP (0.75W) for RMCS1206FT100K (0.25W)? A: Yes. The higher power rating is electrically compatible and does not affect circuit operation. The 0.75W part will operate safely in applications designed for 0.25W resistors. Physical dimensions remain within 1206 package specifications.

Q: What is the difference between anti-sulfur and moisture-resistant features? A: Anti-sulfur coating protects against sulfur-containing environmental contaminants. Moisture-resistant construction provides enhanced protection against humidity. Both are thick film construction variants. The original RMCS1206FT100K includes anti-sulfur protection; substitute parts may include either or both features without affecting electrical equivalence.

Q: Why is ERJ-8ENF1003V marked "Not For New Designs"? A: This designation indicates the manufacturer has discontinued active development for this part. While electrically equivalent and currently in stock, it should not be selected for new product designs. Active alternatives from other manufacturers are recommended.

Q: Are all substitute parts available in Tape & Reel packaging? A: Most substitute parts are available in Tape & Reel (TR) format. CHV1206-FX-1003ELF and ERJ-8ENF1003V are available in Cut Tape (CT) & Digi-Reel format. Packaging format does not affect electrical performance but may influence procurement and assembly processes.

Q: Can I use CRCW1206100KFKTA in a ROHS3-compliant product? A: No. CRCW1206100KFKTA is RoHS non-compliant and REACH affected. It is unsuitable for applications requiring ROHS3 compliance. Select from the ROHS3-compliant alternatives listed above.

Q: What is the significance of AEC-Q200 qualification? A: AEC-Q200 is an automotive industry standard qualification for passive components. Parts carrying this rating have been tested and approved for automotive applications. Selection of AEC-Q200 qualified parts is required for automotive circuit designs.

Q: Are dimensional variations between substitute parts significant? A: All parts conform to 1206 (3216 Metric) package specifications. Minor dimensional variations (length 0.122" to 0.126", width 0.061" to 0.063", height 0.024" to 0.030") fall within standard package tolerances and do not affect PCB layout or assembly compatibility.

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