RC1005F2102CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F2102CS is a 21 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0402 (1005 Metric) package format. This surface mount device is rated for 0.063W (1/16W) power dissipation and features moisture-resistant construction with unlimited moisture sensitivity level (MSL 1). The part is currently active in production with 706 pieces available in cut tape packaging. Equivalent and substitute parts are necessary to address supply chain continuity, alternative packaging requirements, enhanced performance specifications, or design flexibility across multiple manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

RC1005F2102CS

Samsung Electro-MechanicsIn Stock: 745RC1005F2102CS Datasheet

Current PartRFQ

CR0402-FX-2102GLF

Bourns Inc.In Stock: 51584CR0402-FX-2102GLF Datasheet

DirectRFQ

MCR01MRTF2102

Rohm SemiconductorIn Stock: 1537MCR01MRTF2102 Datasheet

DirectRFQ

RC0402FR-0721KL

YAGEOIn Stock: 2419RC0402FR-0721KL Datasheet

DirectRFQ

ERJ-2RKF2102X

Panasonic Electronic ComponentsIn Stock: 79988ERJ-2RKF2102X Datasheet

UpgradeRFQ

AC0402FR-0721KL

YAGEOIn Stock: 17311AC0402FR-0721KL Datasheet

SimilarRFQ

CRCW040221K0FKED

Vishay DaleIn Stock: 103939CRCW040221K0FKED Datasheet

SimilarRFQ

RMCF0402FT21K0

Stackpole Electronics IncIn Stock: 239608RMCF0402FT21K0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F2102CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 21 kOhms
• Tolerance: ±1%
• Package / Case: 0402 (1005 Metric)
• Composition: Thick Film
• Temperature Coefficient: ±100 ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Terminations: 2
• RoHS Status: ROHS3 Compliant
• MSL Rating: 1 (Unlimited)

Allowable Variation Parameters:

• Power Rating: 0.063W (1/16W) baseline; higher ratings (0.1W / 1/10W) are acceptable as upgrades
• Packaging Format: Cut Tape (CT), Tape & Reel (TR), or Digi-Reel® formats are interchangeable based on procurement requirements
• Features: Moisture-resistant and automotive AEC-Q200 certifications are optional enhancements
• Product Status: Active parts are preferred; discontinued parts are listed with status notation

All substitute parts listed maintain full electrical and mechanical compatibility with the RC1005F2102CS within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications): CR0402-FX-2102GLF (Bourns Inc.) and RC0402FR-0721KL (YAGEO) are direct functional equivalents to the RC1005F2102CS. Both maintain identical electrical parameters and operating characteristics. CR0402-FX-2102GLF is supplied in Tape & Reel format with 51,568 units in stock. RC0402FR-0721KL is supplied in Cut Tape & Digi-Reel® format with 2,400 units in stock and includes moisture-resistant features matching the original part.

Discontinued Status Consideration: MCR01MRTF2102 (Rohm Semiconductor) is marked as discontinued at DiGi Electronics. While electrically equivalent, this part should be selected only when existing inventory is available (1,449 units noted) and long-term supply is not a requirement.

Enhanced Performance Option: ERJ-2RKF2102X (Panasonic Electronic Components) provides an upgrade path with increased power rating (0.1W vs. 0.063W) and automotive AEC-Q200 qualification. This part is suitable for applications requiring higher thermal margin or automotive-grade reliability. Inventory availability is substantial at 79,978 units.

Automotive-Qualified Alternatives: AC0402FR-0721KL (YAGEO) and CRCW040221K0FKED (Vishay Dale) both carry AEC-Q200 automotive qualification with moisture-resistant features (AC0402FR-0721KL) or automotive-grade construction (CRCW040221K0FKED). RMCF0402FT21K0 (Stackpole Electronics Inc) also provides AEC-Q200 qualification with the highest inventory level at 239,512 units. These options are appropriate for automotive applications or designs requiring enhanced reliability standards.

Packaging Format Selection: For applications requiring tape & reel format, CR0402-FX-2102GLF, AC0402FR-0721KL, CRCW040221K0FKED, and RMCF0402FT21K0 are available. For cut tape format, RC0402FR-0721KL and MCR01MRTF2102 are available. Digi-Reel® format is available from RC0402FR-0721KL, MCR01MRTF2102, and ERJ-2RKF2102X.

All substitute parts maintain ROHS3 compliance, MSL 1 (unlimited) rating, and REACH unaffected status, ensuring regulatory compatibility with the original RC1005F2102CS specification.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RC1005F2102CS with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts maintain identical resistance (21 kOhms), tolerance (±1%), package (0402), composition (thick film), temperature coefficient (±100 ppm/°C), and operating temperature range (-55°C to 155°C). Direct substitution is electrically and mechanically compatible. The only consideration is packaging format (cut tape vs. tape & reel), which affects procurement and assembly processes, not circuit function.

Q: What is the difference between the 0.063W and 0.1W power ratings?

A: The RC1005F2102CS is rated for 0.063W (1/16W) power dissipation. ERJ-2RKF2102X is rated for 0.1W (1/10W). The higher power rating in ERJ-2RKF2102X provides greater thermal capacity and margin for the same physical package size. This is an upgrade that does not compromise compatibility; a 0.1W-rated resistor can be used in any application designed for 0.063W or lower. No circuit modification is required.

Q: Are the automotive AEC-Q200 qualified parts suitable for non-automotive applications?

A: Yes. Automotive AEC-Q200 qualification represents enhanced reliability and quality standards. Parts such as AC0402FR-0721KL, CRCW040221K0FKED, RMCF0402FT21K0, and ERJ-2RKF2102X can be used in any application, including consumer and industrial designs. The automotive qualification is an additional assurance of quality and does not restrict use to automotive circuits.

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

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. The part does not require special moisture-controlled storage or handling procedures. It can be stored and handled under standard industrial conditions without risk of moisture-induced failure. This applies to all listed substitute parts.

Q: Can I mix different manufacturers' parts in the same circuit board assembly?

A: Yes. All substitute parts are electrically and mechanically equivalent. Mixing manufacturers (Samsung, Bourns, Rohm, YAGEO, Panasonic, Vishay Dale, Stackpole) in the same design is acceptable from an engineering standpoint. However, procurement and quality assurance processes may require consistency within a single production batch or assembly run.

Q: What is the difference between Cut Tape (CT), Tape & Reel (TR), and Digi-Reel® packaging?

A: These are packaging and delivery formats that affect procurement and automated assembly processes, not component function. Cut Tape (CT) is supplied in small quantities on carrier tape. Tape & Reel (TR) is supplied on continuous reel for high-volume automated pick-and-place assembly. Digi-Reel® is a proprietary format. All three formats contain identical components; selection depends on production volume and assembly equipment compatibility.

Q: Is the moisture-resistant feature of RC1005F2102CS and RC0402FR-0721KL critical for substitution?

A: No. Moisture-resistant features are beneficial but not mandatory for substitution. The RC1005F2102CS specifies moisture-resistant construction, but CR0402-FX-2102GLF (Bourns) does not list this feature and remains fully compatible. All parts carry MSL 1 (Unlimited) rating, meaning moisture sensitivity is not a limiting factor. The moisture-resistant feature is an optional enhancement, not a substitution requirement.

Q: Why is MCR01MRTF2102 marked as discontinued?

A: MCR01MRTF2102 (Rohm Semiconductor) is discontinued at DiGi Electronics, indicating it is no longer actively stocked or supported by this distributor. However, 1,449 units remain in inventory. This part should be selected only when existing stock is available and long-term supply continuity is not required. For new designs or long-term production, active parts such as CR0402-FX-2102GLF, RC0402FR-0721KL, or RMCF0402FT21K0 are recommended.

Q: What is ROHS3 compliance?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) is a European Union regulation restricting the use of specific hazardous materials in electrical and electronic equipment. All listed parts are ROHS3 compliant, meaning they meet these environmental and safety standards. This compliance is required for products sold in the EU and is increasingly required globally.

Q: Can I use ERJ-2RKF2102X as a direct replacement in existing designs?

A: Yes. ERJ-2RKF2102X is a direct replacement with enhanced specifications. The higher power rating (0.1W vs. 0.063W) and automotive AEC-Q200 qualification are improvements that do not require circuit modification. The part is pin-compatible, package-compatible, and electrically compatible. No design changes are necessary.