RMCF2512FT1K21 Equivalent & Substitute Parts

Part Overview

The RMCF2512FT1K21 is a 1.21 kOhms ±1% 1W chip resistor in 2512 (6432 Metric) package manufactured by Stackpole Electronics Inc. This thick film resistor is designed for automotive applications and meets AEC-Q200 qualification standards. The part is currently active in production with 2059 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

RMCF2512FT1K21

Stackpole Electronics IncIn Stock: 2156RMCF2512FT1K21 Datasheet

Current PartRFQ

CRCW25121K21FKEG

Vishay DaleIn Stock: 34976CRCW25121K21FKEG Datasheet

DirectRFQ

CRCW25121K21FKEGHP

Vishay DaleIn Stock: 4635CRCW25121K21FKEGHP Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RMCF2512FT1K21 are qualified based on the following criteria:

Direct Electrical Compatibility Parameters:

• Resistance value: 1.21 kOhms
• Tolerance: ±1%
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Package / Case: 2512 (6432 Metric)
• Composition: Thick Film
• Automotive qualification: AEC-Q200
• RoHS compliance: ROHS3 Compliant

Mechanical Compatibility Parameters:

• Number of terminations: 2
• Height - Seated (Max): 0.028" (0.70mm)
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: direct equivalents (matching 1W power rating) and upgraded alternatives (higher power rating with enhanced pulse withstanding capability). Both categories maintain identical electrical specifications and automotive qualification requirements.

Parameter Comparison

Engineering Selection Recommendations

CRCW25121K21FKEG (Direct Equivalent): This part provides direct substitution for the RMCF2512FT1K21 with identical electrical and mechanical specifications. Both parts maintain 1W power rating, ±1% tolerance, and AEC-Q200 automotive qualification. Selection of this substitute is appropriate for applications requiring equivalent performance characteristics and is supported by active production status and ROHS3 compliance.

CRCW25121K21FKEGHP (Upgraded Alternative): This part offers enhanced capability through increased power rating (1.5W) and pulse withstanding features while maintaining all other electrical parameters identical to the main part. The upgraded alternative is suitable for applications where higher transient power dissipation or pulse handling is required. This part retains AEC-Q200 qualification and ROHS3 compliance, supporting long-term supply chain continuity.

Both substitute parts are manufactured by Vishay Dale and maintain active production status, ensuring availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can CRCW25121K21FKEG be used as a direct replacement for RMCF2512FT1K21?

A: Yes. Both parts share identical resistance (1.21 kOhms), tolerance (±1%), power rating (1W), package (2512), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. Electrical and mechanical compatibility is confirmed across all specified parameters.

Q: What is the difference between CRCW25121K21FKEG and CRCW25121K21FKEGHP?

A: The primary difference is power rating: CRCW25121K21FKEG is rated at 1W, while CRCW25121K21FKEGHP is rated at 1.5W. The upgraded part (FKEGHP) includes pulse withstanding capability. All other electrical parameters, package dimensions, and automotive qualifications remain identical. Selection depends on application power dissipation requirements.

Q: Are all substitute parts AEC-Q200 qualified?

A: Yes. The main part RMCF2512FT1K21 and both substitute parts CRCW25121K21FKEG and CRCW25121K21FKEGHP carry AEC-Q200 automotive qualification, confirming suitability for automotive applications.

Q: Do the substitute parts have the same package dimensions?

A: Yes. All three parts use the 2512 (6432 Metric) package with identical maximum seated height of 0.028" (0.70mm). PCB layout and assembly compatibility is maintained across all parts.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both CRCW25121K21FKEG and CRCW25121K21FKEGHP are ROHS3 compliant, matching the compliance status of the main part RMCF2512FT1K21.

Q: What is the moisture sensitivity level for substitute parts?

A: Both substitute parts have Moisture Sensitivity Level 1 (Unlimited), identical to the main part. This indicates no moisture sensitivity restrictions for storage and handling.