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MCR03EZPFX12R1 Equivalent & Substitute Parts
Part Overview
The MCR03EZPFX12R1 is a 12.1 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
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 12.1 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 to 155°C |
| Number of Terminations | 2 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the MCR03EZPFX12R1 is determined by strict equivalence across the following parameters: resistance value (12.1 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).
Substitute parts are categorized into two groups:
Direct Substitutes maintain full automotive AEC-Q200 certification and identical electrical specifications. These parts are functionally interchangeable with the original MCR03EZPFX12R1.
Similar Substitutes meet all electrical and mechanical parameters but feature moisture-resistant construction instead of automotive AEC-Q200 rating. These parts are suitable for applications where automotive certification is not required.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Operating Temp | AEC-Q200 | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| MCR03EZPFX12R1 | Rohm Semiconductor | 12.1 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Discontinued | 676 Pcs |
| CRCW060312R1FKEA | Vishay Dale | 12.1 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 31604 Pcs |
| ERJ-3EKF12R1V | Panasonic Electronic Components | 12.1 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 20593 Pcs |
| RMCF0603FT12R1 | Stackpole Electronics Inc | 12.1 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 1595 Pcs |
| CR0603-FX-12R1ELF | Bourns Inc. | 12.1 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 49949 Pcs |
| RC0603FR-0712R1L | YAGEO | 12.1 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 530145 Pcs |
Engineering Selection Recommendations
For automotive applications requiring AEC-Q200 certification, select from the direct substitutes: CRCW060312R1FKEA (Vishay Dale), ERJ-3EKF12R1V (Panasonic Electronic Components), or RMCF0603FT12R1 (Stackpole Electronics Inc). All three maintain full compliance with automotive standards and identical electrical specifications to the original MCR03EZPFX12R1.
For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-12R1ELF (Bourns Inc.) and RC0603FR-0712R1L (YAGEO) are suitable alternatives. Both parts meet all electrical and mechanical parameters with moisture-resistant construction. YAGEO RC0603FR-0712R1L offers the highest inventory availability at 530,145 pieces.
All substitute parts are RoHS3 compliant and REACH unaffected, matching the environmental compliance of the original component.
Frequently Asked Questions (FAQ)
Q: Can I use CR0603-FX-12R1ELF or RC0603FR-0712R1L in place of MCR03EZPFX12R1 in automotive applications?
A: No. CR0603-FX-12R1ELF and RC0603FR-0712R1L lack AEC-Q200 automotive certification. Use these parts only in non-automotive applications. For automotive use, select CRCW060312R1FKEA, ERJ-3EKF12R1V, or RMCF0603FT12R1.
Q: Are all substitute parts physically identical to MCR03EZPFX12R1?
A: All substitute parts use the same 0603 (1608 Metric) package. Physical dimensions vary slightly between manufacturers within acceptable tolerances. CRCW060312R1FKEA measures 0.061" L x 0.033" W with 0.020" max height, while MCR03EZPFX12R1 measures 0.063" L x 0.031" W with 0.022" max height. These variations do not affect PCB layout compatibility.
Q: What is the difference between direct substitutes and similar substitutes?
A: Direct substitutes (CRCW060312R1FKEA, ERJ-3EKF12R1V, RMCF0603FT12R1) carry AEC-Q200 automotive certification identical to the original part. Similar substitutes (CR0603-FX-12R1ELF, RC0603FR-0712R1L) feature moisture-resistant construction but lack automotive certification. Select based on application requirements.
Q: Can I mix different substitute part numbers in the same production batch?
A: Yes. All listed substitutes meet identical electrical specifications (12.1 Ohms ±1%, 0.1W, ±100ppm/°C, -55°C to 155°C). However, for traceability and quality control, maintain consistent part sourcing within a single production run when possible.
Q: Which substitute has the best availability?
A: RC0603FR-0712R1L (YAGEO) has the highest inventory at 530,145 pieces. For automotive applications, CRCW060312R1FKEA (Vishay Dale) offers 31,604 pieces in stock.
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