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S6012DRP Equivalent & Substitute Parts
Part Overview
The S6012DRP is a 600V, 12A standard recovery SCR (silicon-controlled rectifier) manufactured by Littelfuse Inc. in a surface mount TO-252 (DPAK) package. This thyristor is designed for general-purpose switching and control applications requiring 600V blocking voltage with 12A RMS current capability. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Substitute parts are necessary when the original S6012DRP is unavailable, when alternative packaging formats are required, or when design specifications allow for functionally equivalent alternatives from qualified manufacturers.
Substiute Parts
Key Parameters
| Parameter | S6012DRP Value | Unit |
|---|---|---|
| Voltage - Off State | 600 | V |
| Current - On State (It RMS) | 12 | A |
| Voltage - Gate Trigger (Vgt) Max | 1.5 | V |
| Current - Gate Trigger (Igt) Max | 20 | mA |
| Voltage - On State (Vtm) Max | 1.6 | V |
| Current - Hold (Ih) Max | 40 | mA |
| SCR Type | Standard Recovery | — |
| Operating Temperature Range | -40 to 125 | °C |
| Package / Case | TO-252-3 DPAK | — |
| Mounting Type | Surface Mount | — |
Substitute Part Grouping Explanation
Substitution eligibility for the S6012DRP is determined by the following criteria:
Primary Matching Parameters:
- Voltage - Off State: 600V (exact match required)
- Current - On State (It RMS): 12A (exact match required)
- Package / Case: TO-252-3 DPAK (exact match required)
- Mounting Type: Surface Mount (exact match required)
Secondary Compatibility Parameters:
- SCR Type: Standard Recovery preferred; Sensitive Gate variants acceptable if gate trigger specifications are within application tolerance
- Operating Temperature Range: -40°C to 125°C minimum
- Gate Trigger Voltage (Vgt) and Current (Igt): Must not exceed application requirements
Acceptable Variations:
- Voltage - On State (Vtm): Variations within ±0.3V acceptable
- Current - Hold (Ih): Variations acceptable if within application requirements
- Packaging format: Tape & Reel (TR), Tube, or Cut Tape (CT) formats are interchangeable for the same electrical part
Parameter Comparison
| Part Number | Manufacturer | Voltage Off State (V) | It RMS (A) | Vgt Max (V) | Igt Max (mA) | Vtm Max (V) | Ih Max (mA) | SCR Type | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|
| S6012DRP | Littelfuse | 600 | 12 | 1.5 | 20 | 1.6 | 40 | Standard Recovery | -40 to 125 | TO-252 DPAK |
| MCR12DCMT4G | Littelfuse | 600 | 12 | 1.0 | 20 | 1.9 | 40 | Standard Recovery | -40 to 125 | TO-252 DPAK |
| MCR12DSMT4G | Littelfuse | 600 | 12 | 1.0 | 0.2 | 1.9 | 6 | Sensitive Gate | -40 to 110 | TO-252 DPAK |
| TN1205T-600B-TR | STMicroelectronics | 600 | 12 | 1.3 | 5 | 1.6 | 15 | Standard Recovery | -40 to 125 | TO-252 DPAK |
| TN1215-600B | STMicroelectronics | 600 | 12 | 1.3 | 15 | 1.6 | 40 | Standard Recovery | -40 to 125 | TO-252 DPAK |
| TN1215-600B-TR | STMicroelectronics | 600 | 12 | 1.3 | 15 | 1.6 | 40 | Standard Recovery | -40 to 125 | TO-252 DPAK |
| TS1220-600B | STMicroelectronics | 600 | 12 | 0.8 | 0.2 | 1.6 | 5 | Sensitive Gate | -40 to 125 | TO-252 DPAK |
Engineering Selection Recommendations
Direct Equivalents (Standard Recovery, 600V 12A):
MCR12DCMT4G and TN1215-600B / TN1215-600B-TR are the primary direct substitutes. Both maintain 600V blocking voltage, 12A RMS current, and TO-252 DPAK packaging. MCR12DCMT4G is Littelfuse manufactured with identical gate trigger current specification (20 mA). TN1215-600B variants are STMicroelectronics equivalents with lower gate trigger current (15 mA) and lower hold current (40 mA vs. 40 mA), suitable for applications with relaxed gate drive requirements.
Alternative Current Ratings (Same Voltage, Different Current):
MCR8DCMT4G (8A RMS) and TN805-600B-TR / TN815-600B-TR (8A RMS) are suitable only when application current requirements do not exceed 8A. These parts share identical 600V blocking voltage and TO-252 DPAK packaging but reduced current capacity.
TN1515-600B-TR (15A RMS) is suitable when application current requirements exceed 12A. This part maintains 600V blocking voltage and TO-252 DPAK packaging with increased current capacity.
Sensitive Gate Variants:
MCR12DSMT4G and TS1220-600B are sensitive gate SCRs with significantly reduced gate trigger current (200 µA and 200 µA respectively). These are suitable only when gate drive circuits are designed for sensitive gate operation. MCR12DSMT4G operates to 125°C; TS1220-600B operates to 125°C. Both maintain 600V 12A electrical specifications.
Compliance and Certification:
All listed substitutes are ROHS3 compliant and carry EAR99 ECCN classification. All maintain MSL 1 (unlimited) moisture sensitivity rating. STMicroelectronics parts (TN series) carry REACH Unaffected status; Littelfuse MCR12DSMT4G carries REACH Affected status.
Frequently Asked Questions (FAQ)
Q: Can MCR8DCMT4G replace S6012DRP in all applications?
A: No. MCR8DCMT4G is rated for 8A RMS current versus S6012DRP's 12A RMS. Substitution is valid only when application current requirements do not exceed 8A continuous operation.
Q: What is the difference between Standard Recovery and Sensitive Gate SCRs?
A: Standard Recovery SCRs (S6012DRP, MCR12DCMT4G, TN1215-600B) require higher gate trigger current (typically 15–20 mA) for reliable triggering. Sensitive Gate SCRs (MCR12DSMT4G, TS1220-600B) require only 200 µA gate trigger current, enabling simpler gate drive circuits. Sensitive Gate variants are direct electrical substitutes only when gate drive circuits are designed accordingly.
Q: Are Tape & Reel (TR) and Tube packaging interchangeable?
A: Yes. TN1215-600B (Tube) and TN1215-600B-TR (Tape & Reel) are electrically identical. Packaging format selection depends on assembly equipment and volume requirements, not electrical performance.
Q: Can TN1515-600B-TR (15A) replace S6012DRP (12A)?
A: Yes. TN1515-600B-TR maintains identical 600V blocking voltage and TO-252 DPAK package with increased current capacity (15A RMS). This substitution is valid for all applications where S6012DRP is specified, as the higher current rating provides additional margin.
Q: What is the impact of different Vgt (Gate Trigger Voltage) specifications?
A: Vgt differences (S6012DRP 1.5V vs. TN1215-600B 1.3V) indicate the gate voltage threshold for SCR triggering. Lower Vgt values require less gate voltage to initiate conduction. Substitution is valid when gate drive circuits can accommodate the specified Vgt range of the replacement part.
Q: Are STMicroelectronics TN series parts direct replacements for Littelfuse S6012DRP?
A: Yes. TN1215-600B and TN1215-600B-TR are direct electrical and mechanical equivalents. Both maintain 600V blocking voltage, 12A RMS current, Standard Recovery type, and TO-252 DPAK packaging. Minor differences in gate trigger specifications (Vgt 1.3V vs. 1.5V, Igt 15 mA vs. 20 mA) are within acceptable substitution tolerance for standard applications.
Q: What does "Current - Non Rep. Surge" specification indicate?
A: Non-repetitive surge current (Itsm) indicates the maximum peak current the SCR can withstand during brief transient events without damage. S6012DRP specifies 100A @ 50Hz and 120A @ 60Hz. Substitute parts with equal or higher Itsm ratings provide equivalent or superior transient protection.
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