MCR03EZPFX49R9 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX49R9 is a 49.9 Ohms ±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, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

MCR03EZPFX49R9

Rohm SemiconductorIn Stock: 838MCR03EZPFX49R9 Datasheet

Current PartRFQ

CRCW060349R9FKEA

Vishay DaleIn Stock: 10400CRCW060349R9FKEA Datasheet

DirectRFQ

CRCW060349R9FKEB

Vishay DaleIn Stock: 19340CRCW060349R9FKEB Datasheet

DirectRFQ

CRCW060349R9FKEC

Vishay DaleIn Stock: 14156CRCW060349R9FKEC Datasheet

DirectRFQ

ERJ-3EKF49R9V

Panasonic Electronic ComponentsIn Stock: 4481ERJ-3EKF49R9V Datasheet

DirectRFQ

RMCF0603FT49R9

Stackpole Electronics IncIn Stock: 1538105RMCF0603FT49R9 Datasheet

DirectRFQ

CR0603-FX-49R9ELF

Bourns Inc.In Stock: 253021CR0603-FX-49R9ELF Datasheet

SimilarRFQ

RC0603FR-0749R9L

YAGEOIn Stock: 20413RC0603FR-0749R9L Datasheet

SimilarRFQ

RCA060349R9FKEA

Vishay DaleIn Stock: 11760RCA060349R9FKEA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCR03EZPFX49R9 is determined by strict equivalence across the following parameters: resistance value (49.9 Ohms), tolerance (±1%), power rating (0.1W), package type (0603), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and compliance certifications (RoHS3, REACH Unaffected, EAR99).

Direct Substitutes maintain all electrical and mechanical specifications identical to the original part:

• CRCW060349R9FKEA (Vishay Dale) — Active status, Cut Tape packaging
• CRCW060349R9FKEC (Vishay Dale) — Active status, Tape & Reel packaging
• ERJ-3EKF49R9V (Panasonic Electronic Components) — Active status, Cut Tape packaging
• RMCF0603FT49R9 (Stackpole Electronics Inc) — Active status, Tape & Reel packaging

Similar Substitutes meet all electrical specifications but differ in specific features or certifications:

• CR0603-FX-49R9ELF (Bourns Inc.) — Moisture Resistant feature instead of AEC-Q200 automotive rating
• RC0603FR-0749R9L (YAGEO) — Moisture Resistant feature instead of AEC-Q200 automotive rating
• RCA060349R9FKEA (Vishay Dale) — Anti-Sulfur and AEC-Q200 features, enhanced environmental protection
• CRCW060349R9FKEB (Vishay Dale) — Discontinued at DiGi Electronics, Tape & Reel packaging

Parameter Comparison

Engineering Selection Recommendations

For applications requiring strict AEC-Q200 automotive compliance, select from the direct substitute group: CRCW060349R9FKEA, CRCW060349R9FKEC, ERJ-3EKF49R9V, or RMCF0603FT49R9. All four parts maintain active product status and full electrical equivalence to the MCR03EZPFX49R9.

RMCF0603FT49R9 from Stackpole Electronics Inc offers the highest inventory availability (1,538,057 units) and active status, making it the primary recommendation for high-volume production requirements.

CRCW060349R9FKEA from Vishay Dale provides an alternative with substantial inventory (10,300 units) and active status, suitable for applications where Vishay component qualification is required.

RCA060349R9FKEA from Vishay Dale adds anti-sulfur protection to the AEC-Q200 specification, providing enhanced environmental resistance for applications in corrosive environments while maintaining full automotive compliance.

For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-49R9ELF (Bourns) and RC0603FR-0749R9L (YAGEO) are functionally equivalent with moisture-resistant thick film composition and significantly higher inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use CR0603-FX-49R9ELF or RC0603FR-0749R9L as direct replacements for MCR03EZPFX49R9 in automotive applications?

A: No. These parts lack AEC-Q200 automotive certification. Use them only in non-automotive applications where automotive qualification is not required. For automotive use, select from CRCW060349R9FKEA, CRCW060349R9FKEC, ERJ-3EKF49R9V, or RMCF0603FT49R9.

Q: What is the difference between CRCW060349R9FKEA and CRCW060349R9FKEC?

A: Both are Vishay Dale CRCW series 49.9 Ohm ±1% 0.1W 0603 resistors with identical electrical specifications and AEC-Q200 rating. The difference is packaging: FKEA uses Cut Tape (CT) & Digi-Reel format, while FKEC uses Tape & Reel (TR) format. Select based on your assembly equipment requirements.

Q: Is RCA060349R9FKEA a suitable substitute?

A: Yes. RCA060349R9FKEA meets all electrical and mechanical specifications of MCR03EZPFX49R9 and adds anti-sulfur protection. It is AEC-Q200 certified and actively produced by Vishay Dale. Use it when enhanced environmental protection against sulfur contamination is beneficial.

Q: Why is RMCF0603FT49R9 recommended despite being from a different manufacturer?

A: RMCF0603FT49R9 from Stackpole Electronics Inc is electrically and mechanically identical to MCR03EZPFX49R9, maintains AEC-Q200 certification, and has the highest inventory availability (1,538,057 units). It is actively produced and suitable for high-volume applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the environmental compliance of the original MCR03EZPFX49R9.

Q: What is the significance of Moisture Sensitivity Level 1?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed parts carry MSL 1 rating, ensuring no special storage or handling procedures are necessary.