RMCS1206FT1K27 Equivalent & Substitute Parts

Part Overview

The RMCS1206FT1K27 is a 1.27 kOhms ±1% 0.25W chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This thick film, anti-sulfur resistor operates across -55°C to 155°C and is ROHS3 compliant with MSL 1 rating. The part is currently active in production. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component requirements.

Key Parameters

Parameter	Value
Resistance	1.27 kOhms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package	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

Substitution eligibility is determined by the following criteria:

Resistance value: 1.27 kOhms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package type: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS compliance: ROHS3 Compliant
Moisture sensitivity: MSL 1

All identified substitute parts meet these electrical and mechanical specifications. Variations in physical dimensions (length, width, height) within standard tolerances and additional certifications (such as AEC-Q200 automotive qualification) do not preclude substitution compatibility.

Parameter Comparison

Parameter	RMCS1206FT1K27	AC1206FR-071K27L	CRCW12061K27FKEA	ERJ-8ENF1271V	RC1206FR-071K27L
Manufacturer	Stackpole Electronics Inc	YAGEO	Vishay Dale	Panasonic Electronic Components	YAGEO
Resistance	1.27 kOhms	1.27 kOhms	1.27 kOhms	1.27 kOhms	1.27 kOhms
Tolerance	±1%	±1%	±1%	±1%	±1%
Power Rating	0.25W	0.25W	0.25W	0.25W	0.25W
Package	1206	1206	1206	1206	1206
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Not For New Designs	Active

Engineering Selection Recommendations

All four substitute parts meet the core electrical and mechanical specifications of the RMCS1206FT1K27. Selection should be based on product lifecycle status and application requirements:

AC1206FR-071K27L (YAGEO) and RC1206FR-071K27L (YAGEO) are both active products with full production support. AC1206FR-071K27L includes AEC-Q200 automotive qualification and moisture-resistant features, suitable for automotive and harsh environment applications. RC1206FR-071K27L provides moisture-resistant thick film construction for general industrial use.

CRCW12061K27FKEA (Vishay Dale) is an active product with AEC-Q200 automotive qualification, appropriate for automotive-grade applications requiring established supplier qualification.

ERJ-8ENF1271V (Panasonic Electronic Components) carries a "Not For New Designs" status and should be used only for legacy system maintenance or replacement scenarios where design continuity is required.

Frequently Asked Questions (FAQ)

Q: Can AC1206FR-071K27L replace RMCS1206FT1K27 in new designs? A: Yes. AC1206FR-071K27L meets all electrical specifications (1.27 kOhms ±1%, 0.25W, ±100ppm/°C, -55°C to 155°C) and mechanical requirements (1206 package, ROHS3, MSL 1). The addition of AEC-Q200 automotive qualification and moisture-resistant features provides equivalent or enhanced performance.

Q: What is the difference between the substitute parts? A: All substitutes share identical resistance, tolerance, power rating, package, and temperature specifications. Differences include manufacturer, specific features (automotive qualification, moisture resistance), and product lifecycle status. AC1206FR-071K27L and CRCW12061K27FKEA include AEC-Q200 certification. ERJ-8ENF1271V is marked "Not For New Designs."

Q: Are physical dimension variations significant? A: Physical dimensions vary slightly across manufacturers (length 0.122" to 0.126", width 0.061" to 0.063", height 0.024" to 0.028") but remain within standard 1206 package tolerances. These variations do not affect PCB footprint compatibility or electrical performance.

Q: Should ERJ-8ENF1271V be used for new applications? A: No. ERJ-8ENF1271V carries "Not For New Designs" status and should be reserved for legacy system maintenance only. Use AC1206FR-071K27L, CRCW12061K27FKEA, or RC1206FR-071K27L for new designs.

Q: Is MSL 1 rating consistent across all parts? A: Yes. All parts, including the original RMCS1206FT1K27 and all substitutes, have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message