RC5025F21R5CS Equivalent & Substitute Parts Reference

Part Overview

The RC5025F21R5CS is a 21.5 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated for 0.667W (2/3W) power dissipation in a 2010 (5025 Metric) package. This component is classified as Active product status and is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and package compatibility to support component procurement flexibility and supply chain continuity.

Substiute Parts

RC5025F21R5CS

Samsung Electro-MechanicsIn Stock: 1052RC5025F21R5CS Datasheet

Current PartRFQ

AC2010FK-0721R5L

YAGEOIn Stock: 4654AC2010FK-0721R5L Datasheet

UpgradeRFQ

ERJ-12SF21R5U

Panasonic Electronic ComponentsIn Stock: 9529ERJ-12SF21R5U Datasheet

SimilarRFQ

RMCF2010FT21R5

Stackpole Electronics IncIn Stock: 810RMCF2010FT21R5 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC5025F21R5CS are qualified based on the following criteria:

Electrical Parameters (Critical):

• Resistance value: 21.5 Ohms
• Tolerance: ±1%
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical Parameters (Critical):

• Package type: 2010 (5025 Metric)
• Physical dimensions: 0.197" L x 0.098" W (5.00mm x 2.50mm)
• Number of terminations: 2

Material & Composition:

• Thick film construction

Compliance & Ratings:

• RoHS3 compliance
• MSL 1 (Unlimited) moisture sensitivity

Power Rating Consideration: Substitute parts with equal or higher power ratings (0.75W or greater) are functionally compatible with the 0.667W main part in applications where thermal management permits. Parts with lower power ratings are not qualified substitutes.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Upgrade Path): AC2010FK-0721R5L (YAGEO) is the recommended primary substitute. This part maintains Active product status, provides increased power rating (0.75W vs. 0.667W), includes automotive AEC-Q200 qualification, and offers superior long-term availability with 4641 units in stock. Mechanical and electrical parameters are fully compatible with the main part.

Secondary Substitute (Active Status): RMCF2010FT21R5 (Stackpole Electronics Inc) is an active alternative with equivalent electrical specifications, AEC-Q200 automotive qualification, and 0.75W power rating. This part supports continued design flexibility with 728 units available.

Legacy Substitute (Not For New Designs): ERJ-12SF21R5U (Panasonic Electronic Components) carries "Not For New Designs" product status and should not be selected for new circuit designs. This part is listed for reference only in applications requiring existing component compatibility or legacy system support.

All substitute parts are ROHS3 compliant, MSL 1 rated, and operate within the -55°C ~ 155°C temperature range specified for the main part.

Frequently Asked Questions (FAQ)

Q: Can AC2010FK-0721R5L replace RC5025F21R5CS directly? A: Yes. Both parts share identical resistance (21.5 Ohms), tolerance (±1%), package (2010/5025 Metric), and operating temperature range (-55°C ~ 155°C). The substitute offers higher power rating (0.75W vs. 0.667W), which is compatible in applications where thermal conditions permit.

Q: What is the difference between the main part and substitute parts in terms of power rating? A: The RC5025F21R5CS is rated for 0.667W (2/3W), while AC2010FK-0721R5L, ERJ-12SF21R5U, and RMCF2010FT21R5 are all rated for 0.75W (3/4W). Higher power rating substitutes are functionally compatible and provide additional thermal margin in power dissipation applications.

Q: Are all substitute parts automotive qualified? A: AC2010FK-0721R5L, ERJ-12SF21R5U, and RMCF2010FT21R5 all carry AEC-Q200 automotive qualification. The main part RC5025F21R5CS does not specify AEC-Q200 rating. Automotive applications should specify AEC-Q200 qualified substitutes.

Q: Why is ERJ-12SF21R5U marked "Not For New Designs"? A: ERJ-12SF21R5U carries "Not For New Designs" product status from Panasonic. This designation indicates the manufacturer is phasing out this part number. New circuit designs should select AC2010FK-0721R5L or RMCF2010FT21R5 for long-term supply assurance.

Q: Are there height differences between substitute parts? A: Yes. RC5025F21R5CS has maximum seated height of 0.026" (0.66mm), while AC2010FK-0721R5L is 0.026" (0.65mm), and both ERJ-12SF21R5U and RMCF2010FT21R5 are 0.028" (0.70mm). These variations are within typical PCB assembly tolerances for 2010 package components.

Q: Do all parts have the same moisture sensitivity rating? A: Yes. RC5025F21R5CS, AC2010FK-0721R5L, ERJ-12SF21R5U, and RMCF2010FT21R5 all carry MSL 1 (Unlimited) moisture sensitivity level, indicating no moisture bake-out requirement prior to soldering.

Q: Which substitute offers the best long-term availability? A: AC2010FK-0721R5L (YAGEO) has the highest inventory level at 4641 units in stock, followed by ERJ-12SF21R5U (Panasonic) at 9448 units. However, ERJ-12SF21R5U is marked "Not For New Designs." For new designs, AC2010FK-0721R5L is the recommended choice for supply continuity.