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MCR03EZPFX54R9 Equivalent & Substitute Parts
Part Overview
The MCR03EZPFX54R9 is a 54.9 Ohm ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This automotive-grade component meets AEC-Q200 qualification standards and operates across -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
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 54.9 Ohms |
| Tolerance | ±1% |
| Power Rating | 0.1W (1/10W) |
| Package / Case | 0603 (1608 Metric) |
| Composition | Thick Film |
| Temperature Coefficient | ±100ppm/°C |
| Operating Temperature Range | -55°C ~ 155°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict equivalence across the following parameters:
- Resistance value: 54.9 Ohms
- 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
- RoHS compliance: ROHS3 Compliant
- Moisture sensitivity: MSL 1
All listed substitute parts meet these core electrical and mechanical parameters. Parts are grouped by product status and certification level to facilitate selection based on application requirements.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Op. Temp Range | AEC-Q200 | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| MCR03EZPFX54R9 | Rohm Semiconductor | 54.9 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Discontinued | 821 Pcs |
| MCR03ERTF54R9 | Rohm Semiconductor | 54.9 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Discontinued | 1108 Pcs |
| CRCW060354R9FKEA | Vishay Dale | 54.9 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 12907 Pcs |
| ERJ-3EKF54R9V | Panasonic Electronic Components | 54.9 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 60332 Pcs |
| RMCF0603FT54R9 | Stackpole Electronics Inc | 54.9 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 13158 Pcs |
| CR0603-FX-54R9ELF | Bourns Inc. | 54.9 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 25309 Pcs |
| RC0603FR-0754R9L | YAGEO | 54.9 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 583558 Pcs |
Engineering Selection Recommendations
For automotive applications requiring AEC-Q200 certification, select from CRCW060354R9FKEA (Vishay Dale), ERJ-3EKF54R9V (Panasonic), or RMCF0603FT54R9 (Stackpole Electronics). All three are active products with AEC-Q200 qualification and ROHS3 compliance.
For non-automotive applications where AEC-Q200 is not required, CR0603-FX-54R9ELF (Bourns) and RC0603FR-0754R9L (YAGEO) are active alternatives with moisture-resistant thick film construction and ROHS3 compliance. RC0603FR-0754R9L offers the highest inventory availability.
MCR03ERTF54R9 (Rohm Semiconductor) is a discontinued alternative from the same manufacturer series as the primary part but lacks AEC-Q200 certification.
Frequently Asked Questions (FAQ)
Q: Can MCR03ERTF54R9 replace MCR03EZPFX54R9 in automotive applications?
A: MCR03ERTF54R9 matches all electrical and mechanical parameters but lacks AEC-Q200 certification. Use only in non-automotive applications or where automotive qualification is not required.
Q: What is the difference between AEC-Q200 certified and non-certified substitutes?
A: AEC-Q200 certification indicates the component meets automotive reliability and quality standards. CRCW060354R9FKEA, ERJ-3EKF54R9V, and RMCF0603FT54R9 carry this certification. CR0603-FX-54R9ELF and RC0603FR-0754R9L do not. Select based on application requirements.
Q: Are all substitutes mechanically compatible with the 0603 package footprint?
A: All listed parts use the 0603 (1608 Metric) package. Minor dimensional variations exist within tolerance (length 1.55–1.60mm, width 0.80–0.85mm, height 0.50–0.55mm), but all are compatible with standard 0603 PCB footprints.
Q: Which substitute has the best inventory availability?
A: RC0603FR-0754R9L (YAGEO) has 583,558 pieces in stock, significantly higher than other alternatives. ERJ-3EKF54R9V (Panasonic) has 60,332 pieces available.
Q: Do all substitutes meet ROHS3 compliance?
A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected.
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