MCR03ERTF4021 Equivalent & Substitute Parts

Part Overview

The MCR03ERTF4021 is a 4.02 kOhms ±1% 0.1W chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This thick film resistor is designed for general-purpose applications requiring precision resistance values with tight tolerance specifications. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Equivalent alternatives from active manufacturers provide identical electrical performance and mechanical compatibility.

Substiute Parts

MCR03ERTF4021

Rohm SemiconductorIn Stock: 1135MCR03ERTF4021 Datasheet

Current PartRFQ

CR0603-FX-4021ELF

Bourns Inc.In Stock: 170824CR0603-FX-4021ELF Datasheet

DirectRFQ

CRCW06034K02FKEA

Vishay DaleIn Stock: 62628CRCW06034K02FKEA Datasheet

DirectRFQ

RC0603FR-074K02L

YAGEOIn Stock: 25325RC0603FR-074K02L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCR03ERTF4021 is determined by strict equivalence across the following critical parameters:

• Resistance Value: 4.02 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power Rating: 0.1W / 1/10W (exact match required)
• Package: 0603 (1608 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

All three substitute parts meet these criteria. Variations in packaging format (Tape & Reel vs. Cut Tape), manufacturer-specific features (Moisture Resistant, Automotive AEC-Q200), and minor dimensional tolerances do not affect electrical or mechanical substitutability.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are electrically and mechanically equivalent to the MCR03ERTF4021 and are suitable for direct replacement in applications where the original part is no longer available.

CR0603-FX-4021ELF (Bourns Inc.) is recommended for general-purpose applications. This part is in active production with substantial inventory availability (170,803 pcs). The Moisture Resistant feature provides enhanced reliability in humid environments without affecting electrical specifications.

CRCW06034K02FKEA (Vishay Dale) is recommended for automotive and mission-critical applications. This part carries AEC-Q200 automotive qualification and is in active production. The automotive certification ensures compliance with automotive industry reliability and quality standards.

RC0603FR-074K02L (YAGEO) is recommended for cost-sensitive applications requiring active production status. This part is in active production with good inventory availability (25,300 pcs). The Moisture Resistant feature provides environmental protection equivalent to the Bourns alternative.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the MCR03ERTF4021?

A: Yes. All three substitute parts are electrically and mechanically equivalent. They share identical resistance values (4.02 kOhms), tolerance (±1%), power rating (0.1W), package (0603), composition (Thick Film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and compliance certifications (ROHS3, MSL 1).

Q: What is the difference between the packaging formats listed (Tape & Reel vs. Cut Tape)?

A: Packaging format refers to how the parts are supplied. Tape & Reel (TR) is used for automated assembly processes, while Cut Tape (CT) is used for manual or semi-automated assembly. Both formats contain identical components; the difference is in supply method only. Digi-Reel® is DiGi Electronics's proprietary reel format compatible with standard tape feeders.

Q: Are there any dimensional differences between these parts?

A: Minor dimensional variations exist within standard tolerances. The MCR03ERTF4021, CR0603-FX-4021ELF, and RC0603FR-074K02L share identical dimensions (0.063" L x 0.031" W, 1.60mm x 0.80mm). The CRCW06034K02FKEA has slightly different dimensions (0.061" L x 0.033" W, 1.55mm x 0.85mm) and height (0.020" vs. 0.022"), but these remain within 0603 package specifications and do not affect PCB footprint compatibility.

Q: Which substitute should I choose for a new design?

A: Selection depends on application requirements. For general applications, choose based on availability and cost. For automotive applications, specify CRCW06034K02FKEA (AEC-Q200 qualified). For environments with moisture exposure, either CR0603-FX-4021ELF or RC0603FR-074K02L (both Moisture Resistant) are appropriate.

Q: Are all these parts RoHS compliant?

A: Yes. All parts, including the original MCR03ERTF4021, are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.