MCR03EZPFX1243 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX1243 is a 124 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This component is rated for automotive applications under AEC-Q200 standard with an operating temperature range of -55°C to 155°C. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain identical electrical and mechanical specifications for seamless circuit board integration.

Substiute Parts

MCR03EZPFX1243

Rohm SemiconductorIn Stock: 788MCR03EZPFX1243 Datasheet

Current PartRFQ

CRCW0603124KFKEA

Vishay DaleIn Stock: 27124CRCW0603124KFKEA Datasheet

DirectRFQ

ERJ-3EKF1243V

Panasonic Electronic ComponentsIn Stock: 51409ERJ-3EKF1243V Datasheet

DirectRFQ

RMCF0603FT124K

Stackpole Electronics IncIn Stock: 369169RMCF0603FT124K Datasheet

DirectRFQ

CR0603-FX-1243ELF

Bourns Inc.In Stock: 55092CR0603-FX-1243ELF Datasheet

SimilarRFQ

RC0603FR-07124KL

YAGEOIn Stock: 10225RC0603FR-07124KL Datasheet

SimilarRFQ

RC1608F1243CS

Samsung Electro-MechanicsIn Stock: 893RC1608F1243CS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MCR03EZPFX1243 is determined by strict equivalence across the following critical parameters:

• Resistance Value: 124 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: -55°C to 155°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)
• Moisture Sensitivity: MSL 1 (exact match required)

All substitute parts listed below meet these criteria. Dimensional variations within standard manufacturing tolerances do not affect functional equivalence. Automotive AEC-Q200 certification or equivalent moisture-resistant construction ensures reliability in target applications.

Parameter Comparison

*Bourns, YAGEO, and Samsung parts feature moisture-resistant construction equivalent to AEC-Q200 automotive qualification for this resistance and power rating category.

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the MCR03EZPFX1243 based on identical electrical specifications and package dimensions. Selection among active alternatives should prioritize:

Direct AEC-Q200 Equivalents: CRCW0603124KFKEA (Vishay Dale), ERJ-3EKF1243V (Panasonic), and RMCF0603FT124K (Stackpole) carry explicit AEC-Q200 automotive certification, providing direct specification alignment for automotive applications.

Moisture-Resistant Alternatives: CR0603-FX-1243ELF (Bourns), RC0603FR-07124KL (YAGEO), and RC1608F1243CS (Samsung) employ moisture-resistant thick film construction meeting equivalent reliability requirements for the specified operating temperature and environmental conditions.

Availability and Packaging: RMCF0603FT124K offers the highest inventory level (369,069 pcs) in Tape & Reel packaging. CRCW0603124KFKEA (27,036 pcs) and ERJ-3EKF1243V (51,308 pcs) are available in Cut Tape and Digi-Reel formats. All parts comply with ROHS3 and MSL 1 requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the MCR03EZPFX1243 with any of the listed parts without circuit redesign?

A: Yes. All listed parts meet identical electrical specifications (124 kOhms ±1%, 0.1W, ±100ppm/°C, -55°C to 155°C) and are packaged in 0603 (1608 Metric) format. Physical dimensions are within standard manufacturing tolerances and are footprint-compatible.

Q: What is the difference between AEC-Q200 rated parts and moisture-resistant alternatives?

A: AEC-Q200 rated parts (Vishay, Panasonic, Stackpole) carry explicit automotive qualification. Moisture-resistant alternatives (Bourns, YAGEO, Samsung) employ equivalent construction methods for this resistance and power category. Both meet the specified operating temperature range and environmental requirements.

Q: Are there any dimensional differences I should account for in PCB layout?

A: Dimensional variations exist within standard tolerances. The MCR03EZPFX1243 measures 0.063" L × 0.031" W (1.60mm × 0.80mm). Substitute parts range from 0.061" to 0.063" L and 0.031" to 0.033" W. These variations are within standard 0603 package specifications and do not require PCB footprint modification.

Q: Which substitute offers the best lead time and availability?

A: RMCF0603FT124K (Stackpole) has the highest inventory at 369,069 pcs. ERJ-3EKF1243V (Panasonic) and CRCW0603124KFKEA (Vishay) also maintain substantial stock levels exceeding 27,000 pcs each.

Q: Do all substitutes comply with RoHS and MSL requirements?

A: Yes. All listed alternatives are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original MCR03EZPFX1243 specifications.