RMCF0603FG1K21 Equivalent & Substitute Parts

Part Overview

The RMCF0603FG1K21 is a 1.21 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Stackpole Electronics Inc. This automotive-grade component meets AEC-Q200 specifications and operates across -55°C to 155°C. The part is currently active in production with 713 units in stock. Equivalent and substitute parts are necessary to ensure design flexibility, manage supply chain continuity, and accommodate varying procurement requirements across manufacturing partners.

Substiute Parts

RMCF0603FG1K21

Stackpole Electronics IncIn Stock: 759RMCF0603FG1K21 Datasheet

Current PartRFQ

RMCF0603FT1K21

Stackpole Electronics IncIn Stock: 166903RMCF0603FT1K21 Datasheet

DirectRFQ

CRCW06031K21FKEA

Vishay DaleIn Stock: 37516CRCW06031K21FKEA Datasheet

DirectRFQ

CRCW06031K21FKEB

Vishay DaleIn Stock: 20173CRCW06031K21FKEB Datasheet

DirectRFQ

CRG0603F1K21

TE Connectivity Passive ProductIn Stock: 1201CRG0603F1K21 Datasheet

DirectRFQ

ERJ-3EKF1211V

Panasonic Electronic ComponentsIn Stock: 156704ERJ-3EKF1211V Datasheet

DirectRFQ

AC0603FR-071K21L

YAGEOIn Stock: 23163AC0603FR-071K21L Datasheet

MFR RecommendedRFQ

CR0603-FX-1211ELF

Bourns Inc.In Stock: 108446CR0603-FX-1211ELF Datasheet

MFR RecommendedRFQ

RC0603FR-071K21L

YAGEOIn Stock: 996864RC0603FR-071K21L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RMCF0603FG1K21 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1.21 kOhms
• Tolerance: ±1%
• Power rating: 0.1W (1/10W)
• Package: 0603 (1608 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Termination count: 2
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1 (Unlimited)

All substitute parts listed meet these electrical and mechanical specifications. Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) and product status variations do not affect functional equivalence. Dimensional tolerances within the 0603 package specification are acceptable.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the RMCF0603FG1K21 and meet identical electrical specifications. Selection should be based on the following factors:

Product Status: RMCF0603FT1K21, CRG0603F1K21, ERJ-3EKF1211V, AC0603FR-071K21L, CR0603-FX-1211ELF, and RC0603FR-071K21L are all active products with confirmed availability. CRCW06031K21FKEB is discontinued at DiGi Electronics and should be avoided for new designs requiring long-term supply assurance.

Compliance & Certifications: RMCF0603FG1K21, RMCF0603FT1K21, CRCW06031K21FKEA, CRCW06031K21FKEB, ERJ-3EKF1211V, and AC0603FR-071K21L carry AEC-Q200 automotive qualification. CRG0603F1K21 does not list AEC-Q200 certification. CR0603-FX-1211ELF and RC0603FR-071K21L do not specify AEC-Q200 but are moisture resistant. For automotive applications requiring AEC-Q200 compliance, select from the qualified subset.

Inventory Availability: RC0603FR-071K21L offers the highest stock level (996,767 units), followed by RMCF0603FT1K21 (166,892 units) and ERJ-3EKF1211V (156,599 units). RMCF0603FG1K21 has limited availability (713 units).

Packaging Format: Tape & Reel format is standard for high-volume production. Cut Tape & Digi-Reel options (CRCW06031K21FKEA, ERJ-3EKF1211V, RC0603FR-071K21L) are suitable for lower-volume or mixed-component orders.

Frequently Asked Questions (FAQ)

Q: Can I substitute RMCF0603FG1K21 with any of the listed parts without circuit redesign?

A: Yes. All listed parts meet identical electrical specifications: 1.21 kOhms ±1%, 0.1W power rating, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. The 0603 package is standardized across all parts. No circuit redesign is required.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Tape & Reel is continuous reel packaging for automated pick-and-place assembly. Cut Tape & Digi-Reel is pre-cut tape on a reel, suitable for lower-volume orders or mixed-component procurement. Both formats contain identical components; the difference is in handling and ordering quantity minimums.

Q: Does CRCW06031K21FKEB being discontinued affect its use in existing designs?

A: CRCW06031K21FKEB is discontinued at DiGi Electronics but remains functionally equivalent. For new designs or long-term production, select an active product such as CRCW06031K21FKEA, RMCF0603FT1K21, or RC0603FR-071K21L to ensure sustained supply.

Q: Which substitute parts carry AEC-Q200 automotive certification?

A: RMCF0603FG1K21, RMCF0603FT1K21, CRCW06031K21FKEA, CRCW06031K21FKEB, ERJ-3EKF1211V, and AC0603FR-071K21L are AEC-Q200 qualified. For automotive applications requiring this certification, select from this subset.

Q: Are there dimensional differences between substitute parts?

A: All parts conform to the 0603 (1608 Metric) package standard. Minor dimensional variations exist within specification tolerances (length 1.55–1.63mm, width 0.80–0.85mm, height 0.50–0.55mm). These variations do not affect PCB footprint compatibility or assembly.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed parts carry MSL 1, meaning they can be stored and handled under standard conditions without special moisture control procedures.

Q: Can I use CR0603-FX-1211ELF or RC0603FR-071K21L in automotive applications?

A: CR0603-FX-1211ELF and RC0603FR-071K21L are moisture-resistant thick film resistors but do not carry explicit AEC-Q200 certification. For applications requiring automotive qualification, use AEC-Q200 certified parts from the qualified subset.