CSRF2512FK50L0 Equivalent & Substitute Parts

Part Overview

The CSRF2512FK50L0 is a 50 mOhms ±1% 2W chip resistor in 2512 (6432 Metric) package manufactured by Stackpole Electronics Inc. This metal foil composition resistor is designed for current sense applications in automotive environments with AEC-Q200 qualification. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications.

Substiute Parts

CSRF2512FK50L0

Stackpole Electronics IncIn Stock: 1070CSRF2512FK50L0 Datasheet

Current PartRFQ

CSRF2512FT50L0

Stackpole Electronics IncIn Stock: 1813CSRF2512FT50L0 Datasheet

DirectRFQ

CSR2512FK50L0

Stackpole Electronics IncIn Stock: 2497CSR2512FK50L0 Datasheet

MFR RecommendedRFQ

PE2512FKE7W0R05L

YAGEOIn Stock: 4126PE2512FKE7W0R05L Datasheet

DirectRFQ

CRA2512-FZ-R050ELF

Bourns Inc.In Stock: 3391CRA2512-FZ-R050ELF Datasheet

MFR RecommendedRFQ

FCSL64R050FER

OhmiteIn Stock: 10674FCSL64R050FER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CSRF2512FK50L0 is determined by the following critical parameters:

• Resistance value: 50 mOhms
• Tolerance: ±1%
• Package / Case: 2512 (6432 Metric)
• Power rating: 2W minimum
• Temperature coefficient: ±50ppm/°C or better
• Operating temperature range: -55°C ~ 170°C minimum
• Compliance: ROHS3, MSL 1

Substitute parts are grouped into two categories:

Direct Equivalents (Same Composition & Specifications): Parts with identical metal foil composition, 2W power rating, ±50ppm/°C temperature coefficient, and full -55°C ~ 170°C operating range.

Functional Equivalents (Alternative Composition): Parts meeting all electrical specifications but with different composition (thick film or metal film) or slightly different physical dimensions, provided they maintain the 2512 package footprint and electrical performance within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - CSRF2512FT50L0 (Stackpole Electronics Inc): This is the direct equivalent with identical specifications to the obsolete CSRF2512FK50L0. Both are metal foil composition with ±50ppm/°C temperature coefficient and -55°C ~ 170°C operating range. The only difference is packaging format (Tape & Reel vs. bulk). This part is in active production status with 1766 units in stock.

Secondary Substitute - PE2512FKE7W0R05L (YAGEO): This metal film composition part meets all electrical specifications including ±50ppm/°C temperature coefficient and -55°C ~ 170°C operating range. It maintains AEC-Q200 automotive qualification and is actively produced with 4016 units in stock. Metal film composition provides equivalent performance for current sense applications.

Alternative with Enhanced Power Rating - CRA2512-FZ-R050ELF (Bourns Inc.): This part offers 3W power rating (versus 2W) with metal element composition, ±50ppm/°C temperature coefficient, and -55°C ~ 170°C operating range. The higher power rating provides design margin for thermal stress. Actively produced with 3316 units in stock.

Not Recommended - CSR2512FK50L0 (Stackpole Electronics Inc): While this thick film part is electrically compatible, it has a ±200ppm/°C temperature coefficient (versus ±50ppm/°C) and reduced operating temperature range (-55°C ~ 155°C). These deviations may impact precision current sensing applications.

Not Recommended - FCSL64R050FER (Ohmite): This wide 2512 package variant has different physical dimensions and reduced operating temperature range (-55°C ~ 155°C). Physical footprint differences may require PCB layout modifications.

Frequently Asked Questions (FAQ)

Q: Can CSRF2512FT50L0 be used as a direct replacement for CSRF2512FK50L0?

A: Yes. Both parts are identical in electrical specifications, composition (metal foil), tolerance (±1%), power rating (2W), temperature coefficient (±50ppm/°C), and operating temperature range (-55°C ~ 170°C). The difference is packaging format only.

Q: What is the key difference between metal foil and metal film composition for current sense resistors?

A: Both compositions meet the specified electrical parameters for this application. Metal foil typically offers lower temperature coefficient and better stability. Metal film provides equivalent performance for current sense applications within the specified tolerance and temperature range.

Q: Is PE2512FKE7W0R05L suitable for automotive applications?

A: Yes. PE2512FKE7W0R05L carries AEC-Q200 automotive qualification, matching the original part's automotive rating. It meets all electrical specifications required for current sense applications.

Q: Why is CRA2512-FZ-R050ELF rated for 3W instead of 2W?

A: The 3W rating indicates higher power dissipation capability. This part can be used in applications requiring the original 2W specification, as it provides additional thermal margin. However, verify that PCB layout and thermal management are compatible with the slightly different physical dimensions.

Q: Can I use CSR2512FK50L0 as a substitute?

A: CSR2512FK50L0 is electrically compatible but has a ±200ppm/°C temperature coefficient compared to the original ±50ppm/°C. For precision current sensing applications requiring tight temperature stability, this deviation may be significant. Verify application requirements before selection.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the part has unlimited shelf life and requires no special moisture control during storage or handling. All listed substitute parts maintain this MSL 1 rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the original part's environmental compliance status.