RMCS1206FT105K Equivalent & Substitute Parts

Part Overview

The RMCS1206FT105K is a 105 kOhms ±1% 0.25W chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This thick film resistor features anti-sulfur construction and is designed for general-purpose applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status. Equivalent and substitute parts are identified based on matching electrical specifications, package dimensions, and performance characteristics to ensure direct compatibility in circuit designs.

Key Parameters

Parameter	Value
Resistance	105 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)

Substitute Part Grouping Explanation

Substitute parts for the RMCS1206FT105K are qualified based on the following criteria:

Resistance Value: 105 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power Rating: 0.25W / 1/4W (exact match required)
Package: 1206 (3216 Metric) (exact match required)
Composition: Thick Film (exact match required)
Temperature Coefficient: ±100ppm/°C (exact match required)
Operating Temperature Range: -55°C ~ 155°C (exact match required)
Compliance: ROHS3 Compliant, MSL 1 (Unlimited)

All qualified substitutes maintain identical electrical performance and physical compatibility. Variations in dimensional tolerances (length, width, height) within standard manufacturing ranges do not affect functional interchangeability.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	Features	Product Status	RoHS
RMCS1206FT105K	Stackpole Electronics Inc	105 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Anti-Sulfur	Active	ROHS3
CR1206-FX-1053ELF	Bourns Inc.	105 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3
CRCW1206105KFKEA	Vishay Dale	105 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Active	ROHS3
ERJ-8ENF1053V	Panasonic Electronic Components	105 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Not For New Designs	ROHS3
RC1206FR-07105KL	YAGEO	105 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3

Engineering Selection Recommendations

For Active Production Designs: CR1206-FX-1053ELF (Bourns), CRCW1206105KFKEA (Vishay Dale), or RC1206FR-07105KL (YAGEO) are preferred substitutes, as all maintain active product status with full manufacturer support and availability.

For Automotive Applications: CRCW1206105KFKEA (Vishay Dale) is the qualified choice, featuring AEC-Q200 certification for automotive-grade reliability and performance.

For General-Purpose Applications: RC1206FR-07105KL (YAGEO) or CR1206-FX-1053ELF (Bourns) provide moisture-resistant construction suitable for standard industrial and consumer applications.

Obsolescence Consideration: ERJ-8ENF1053V (Panasonic) is marked "Not For New Designs" and should be avoided for new product development, though it remains functionally equivalent for legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for RMCS1206FT105K?

A: Yes. All listed substitutes match the critical electrical parameters (105 kOhms, ±1%, 0.25W) and physical package (1206). They are mechanically and electrically interchangeable in circuit designs.

Q: What is the difference between "Anti-Sulfur" and "Moisture Resistant" features?

A: Both are protective features for thick film resistors. Anti-Sulfur construction protects against sulfur-containing environmental contaminants. Moisture Resistant construction provides enhanced protection against moisture ingress. Both meet the same MSL 1 (Unlimited) moisture sensitivity rating.

Q: Why is ERJ-8ENF1053V marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new product designs. However, the part remains functionally equivalent and available for existing applications or legacy system support.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist within standard manufacturing tolerances. Length ranges from 0.122" to 0.126", width from 0.061" to 0.063", and height from 0.024" to 0.030". These variations do not affect PCB layout compatibility or functional performance.

Q: Do all substitutes have the same temperature coefficient?

A: Yes. All parts specified have ±100ppm/°C temperature coefficient and operate across the identical -55°C to 155°C temperature range.

Q: Which substitute offers the best long-term availability?

A: CRCW1206105KFKEA (Vishay Dale) and RC1206FR-07105KL (YAGEO) show the highest current inventory levels (26,087 and 27,930 units respectively) and active product status, indicating strong long-term availability.

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