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MCR03EZPFX3090 Equivalent & Substitute Parts
Part Overview
The MCR03EZPFX3090 is a 309 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 | 309 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 for the MCR03EZPFX3090 is determined by strict equivalence across the following parameters: resistance value (309 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 standards (ROHS3, REACH Unaffected, EAR99).
Substitute parts are grouped into two categories:
Direct Substitutes maintain all electrical and mechanical specifications including automotive AEC-Q200 rating or equivalent moisture resistance features. These parts are pin-compatible and functionally identical.
Similar Substitutes meet all core electrical parameters and package requirements but may differ in specific feature certifications (such as automotive AEC-Q200 rating versus moisture resistance designation). These parts are electrically and mechanically compatible for general applications.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Op. Temp Range | Features | Status |
|---|---|---|---|---|---|---|---|---|---|
| MCR03EZPFX3090 | Rohm Semiconductor | 309 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Automotive AEC-Q200 | Discontinued |
| MCR03ERTF3090 | Rohm Semiconductor | 309 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Thick Film | Discontinued |
| CRCW0603309RFKEA | Vishay Dale | 309 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Automotive AEC-Q200 | Active |
| ERJ-3EKF3090V | Panasonic Electronic Components | 309 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Automotive AEC-Q200 | Active |
| RMCF0603FT309R | Stackpole Electronics Inc | 309 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Automotive AEC-Q200 | Active |
| CR0603-FX-3090ELF | Bourns Inc. | 309 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Moisture Resistant | Active |
| RC0603FR-07309RL | YAGEO | 309 Ω | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Moisture Resistant | Active |
Engineering Selection Recommendations
For applications requiring automotive AEC-Q200 certification, select from active parts: CRCW0603309RFKEA (Vishay Dale), ERJ-3EKF3090V (Panasonic Electronic Components), or RMCF0603FT309R (Stackpole Electronics Inc). These parts maintain full compliance with automotive standards and are currently in active production with substantial inventory availability.
For general industrial applications where automotive certification is not required, CR0603-FX-3090ELF (Bourns Inc.) and RC0603FR-07309RL (YAGEO) provide equivalent electrical performance with moisture-resistant thick film construction. Both are active products with high inventory levels.
MCR03ERTF3090 (Rohm Semiconductor) is a direct electrical equivalent but shares discontinued status with the original part, making it unsuitable for long-term supply chain planning.
All substitute parts are ROHS3 compliant, REACH unaffected, and classified as EAR99, matching the regulatory profile of the original component.
Frequently Asked Questions (FAQ)
Q: Can I use CR0603-FX-3090ELF or RC0603FR-07309RL as direct replacements for MCR03EZPFX3090 in automotive applications?
A: CR0603-FX-3090ELF and RC0603FR-07309RL are electrically and mechanically equivalent but lack explicit AEC-Q200 automotive certification. They are suitable for non-automotive applications. For automotive use, select CRCW0603309RFKEA, ERJ-3EKF3090V, or RMCF0603FT309R.
Q: Are all substitute parts compatible with the same PCB footprint?
A: Yes. All substitute parts use the 0603 (1608 Metric) package with identical pin count (2 terminations) and compatible physical dimensions. Slight variations in length and height (within 0.002" to 0.004") do not affect PCB assembly compatibility.
Q: What is the difference between Automotive AEC-Q200 and Moisture Resistant designations?
A: Automotive AEC-Q200 indicates qualification for automotive-grade reliability testing and temperature cycling. Moisture Resistant indicates enhanced protection against humidity but does not imply automotive qualification. Selection depends on application requirements.
Q: Which substitute offers the best inventory availability?
A: RC0603FR-07309RL (YAGEO) has the highest inventory level at 55,217 pieces. CRCW0603309RFKEA (Vishay Dale) offers 32,992 pieces with active status and AEC-Q200 certification.
Q: Are all substitutes ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original MCR03EZPFX3090.
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