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MCR18ERTF1104 Equivalent & Substitute Parts
Part Overview
The MCR18ERTF1104 is a 1.1 MOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement in existing designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 1.1 MOhms |
| Tolerance | ±1% |
| Power Rating | 0.25W (1/4W) |
| Composition | Thick Film |
| Package / Case | 1206 (3216 Metric) |
| 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: 1.1 MOhms
- Tolerance: ±1%
- Power rating: 0.25W (1/4W)
- Package: 1206 (3216 Metric)
- Composition: Thick Film
- Operating temperature range: -55°C ~ 155°C
- RoHS3 compliance
- MSL rating: 1 (Unlimited)
All substitute parts listed meet these core requirements. Variations in temperature coefficient (±100ppm/°C vs ±200ppm/°C), physical dimensions within tolerance, and additional certifications (AEC-Q200, moisture resistance) do not preclude substitution but may offer enhanced performance characteristics for specific applications.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Temp Coeff (ppm/°C) | Operating Temp (°C) | Package | Status | RoHS3 |
|---|---|---|---|---|---|---|---|---|---|
| MCR18ERTF1104 | Rohm Semiconductor | 1.1 MOhms | ±1% | 0.25 | ±100 | -55 ~ 155 | 1206 | Discontinued | Yes |
| KTR18EZPF1104 | Rohm Semiconductor | 1.1 MOhms | ±1% | 0.25 | ±100 | -55 ~ 155 | 1206 | Active | Yes |
| CRCW12061M10FKEA | Vishay Dale | 1.1 MOhms | ±1% | 0.25 | ±100 | -55 ~ 155 | 1206 | Active | Yes |
| RMCF1206FT1M10 | Stackpole Electronics Inc | 1.1 MOhms | ±1% | 0.25 | ±200 | -55 ~ 155 | 1206 | Active | Yes |
| ERJ-8ENF1104V | Panasonic Electronic Components | 1.1 MOhms | ±1% | 0.25 | ±100 | -55 ~ 155 | 1206 | Not For New Designs | Yes |
| RC1206FR-071M1L | YAGEO | 1.1 MOhms | ±1% | 0.25 | ±100 | -55 ~ 155 | 1206 | Active | Yes |
Engineering Selection Recommendations
For new designs, select from parts with Active product status: KTR18EZPF1104, CRCW12061M10FKEA, RMCF1206FT1M10, or RC1206FR-071M1L. All are RoHS3 compliant and MSL 1 rated.
KTR18EZPF1104 (Rohm Semiconductor) maintains the same manufacturer as the original part and includes AEC-Q200 automotive qualification with high voltage features.
CRCW12061M10FKEA (Vishay Dale) offers the highest inventory availability (45,400 pcs) and AEC-Q200 certification with the lowest seated height (0.024").
RMCF1206FT1M10 (Stackpole Electronics Inc) provides AEC-Q200 qualification with active product status, though temperature coefficient is ±200ppm/°C.
RC1206FR-071M1L (YAGEO) is active with moisture-resistant features and ±100ppm/°C temperature coefficient.
ERJ-8ENF1104V (Panasonic Electronic Components) is marked "Not For New Designs" and should be avoided for new applications despite active inventory.
Frequently Asked Questions (FAQ)
Q: Can MCR18ERTF1104 be directly replaced with any of these substitute parts?
A: Yes. All listed substitute parts share identical electrical specifications (1.1 MOhms, ±1%, 0.25W) and mechanical compatibility (1206 package). Physical dimension variations are within standard tolerances and do not affect PCB layout or assembly.
Q: What is the difference between ±100ppm/°C and ±200ppm/°C temperature coefficient?
A: Temperature coefficient defines resistance change per degree Celsius. RMCF1206FT1M10 has ±200ppm/°C, meaning greater resistance drift across temperature extremes compared to parts with ±100ppm/°C. For applications requiring tight tolerance across temperature ranges, select parts with ±100ppm/°C.
Q: Why is ERJ-8ENF1104V marked "Not For New Designs"?
A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new applications. Existing inventory remains available, but long-term supply cannot be guaranteed.
Q: Are AEC-Q200 certified parts required for this application?
A: AEC-Q200 certification is not mandatory for general applications. It is required only for automotive and high-reliability environments. KTR18EZPF1104, CRCW12061M10FKEA, RMCF1206FT1M10, and ERJ-8ENF1104V include this certification; RC1206FR-071M1L does not.
Q: What does MSL 1 (Unlimited) mean?
A: Moisture Sensitivity Level 1 indicates the component can be stored indefinitely without moisture-related degradation. No special dry-pack storage or baking procedures are required before soldering.
Q: Are there physical dimension differences that affect PCB design?
A: All parts use 1206 package with minor dimension variations within standard tolerances. Seated heights range from 0.024" to 0.028", which does not impact PCB layout or component clearance in standard designs.
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