RMCS1206FT44K2 Equivalent & Substitute Parts

Part Overview

The RMCS1206FT44K2 is a 44.2 kOhms ±1% 0.25W chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This thick film resistor features anti-sulfur composition and operates across -55°C to 155°C. The part is currently active in production with 1042 units in stock. Substitute parts are necessary when the primary manufacturer part becomes unavailable, when design requirements mandate specific certifications such as AEC-Q200 automotive qualification, or when alternative sourcing improves supply chain resilience.

Key Parameters

Parameter	Value
Resistance	44.2 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

Substitution eligibility for the RMCS1206FT44K2 is determined by strict equivalence across the following parameters: resistance value (44.2 kOhms), tolerance (±1%), power rating (0.25W), package type (1206), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and compliance certifications (ROHS3, REACH Unaffected). All qualified substitute parts maintain identical electrical specifications and mechanical compatibility. Variations in physical dimensions (length, width, height) and specific features (anti-sulfur, moisture resistant, automotive AEC-Q200) do not affect functional substitutability but may influence selection based on application requirements and supply availability.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	RoHS Status	Product Status	Inventory (Pcs)
RMCS1206FT44K2	Stackpole Electronics Inc	44.2 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	Active	1042
CR1206-FX-4422ELF	Bourns Inc.	44.2 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	Active	29763
CRCW120644K2FKEA	Vishay Dale	44.2 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	Active	14365
ERJ-8ENF4422V	Panasonic Electronic Components	44.2 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	Not For New Designs	43439
RC1206FR-0744K2L	YAGEO	44.2 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	Active	4796

Engineering Selection Recommendations

CR1206-FX-4422ELF (Bourns Inc.) and CRCW120644K2FKEA (Vishay Dale) are preferred substitutes for new designs. Both parts carry Active product status and maintain full ROHS3 compliance. CR1206-FX-4422ELF offers the highest inventory availability at 29,763 units. CRCW120644K2FKEA includes AEC-Q200 automotive qualification, suitable for applications requiring automotive-grade reliability standards.

RC1206FR-0744K2L (YAGEO) is an Active substitute with moisture-resistant composition, appropriate for environments with elevated humidity exposure. This part maintains lower inventory levels (4,796 units) compared to Bourns and Vishay alternatives.

ERJ-8ENF4422V (Panasonic Electronic Components) carries "Not For New Designs" status and should not be selected for new product development. This part is suitable only for legacy system maintenance or repair applications where original part compatibility is mandatory.

Frequently Asked Questions (FAQ)

Q: Can all listed substitute parts be used interchangeably with RMCS1206FT44K2?

A: Yes, all four substitute parts meet the core electrical and mechanical specifications: 44.2 kOhms resistance, ±1% tolerance, 0.25W power rating, 1206 package, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. Physical dimension variations and feature differences (anti-sulfur, moisture resistant, AEC-Q200) do not affect functional interchangeability.

Q: What is the difference between anti-sulfur and moisture-resistant compositions?

A: Anti-sulfur composition (RMCS1206FT44K2) protects against sulfur-containing atmospheric contaminants. Moisture-resistant composition (CR1206-FX-4422ELF, RC1206FR-0744K2L) provides enhanced protection in high-humidity environments. Both are thick film resistors with identical electrical performance.

Q: Why is ERJ-8ENF4422V marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development for this part series. While electrically equivalent and suitable for repair or legacy applications, new product designs should select from Active status alternatives to ensure long-term supply availability and manufacturer support.

Q: Does AEC-Q200 certification affect electrical performance?

A: No. AEC-Q200 is an automotive qualification standard certifying reliability and quality under automotive operating conditions. CRCW120644K2FKEA maintains identical electrical specifications to non-automotive alternatives while meeting additional automotive industry requirements.

Q: Are there physical dimension constraints when substituting?

A: All parts use the 1206 (3216 Metric) package with minor dimension variations within standard tolerances. Maximum height ranges from 0.024" to 0.030" (0.60mm to 0.75mm). These variations are within typical PCB assembly tolerances and do not require design modifications for standard applications.

Q: Which substitute offers the best supply availability?

A: CR1206-FX-4422ELF (Bourns Inc.) provides the highest inventory at 29,763 units, followed by ERJ-8ENF4422V (Panasonic) at 43,439 units. However, ERJ-8ENF4422V is not recommended for new designs. For active production, CR1206-FX-4422ELF or CRCW120644K2FKEA are optimal choices.

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