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SMLJ36CA-TP Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The SMLJ36CA-TP is a 36V bidirectional Zener TVS diode manufactured by Micro Commercial Co, designed for transient voltage suppression in general-purpose interface applications. This surface-mount component in DO-214AB (SMC) package provides 58.1V clamping voltage with 51.6A peak pulse current capability and 3000W peak pulse power dissipation. The part is active in production status with 1019 units in current inventory.
Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required, or when design specifications allow for equivalent electrical performance from alternative manufacturers while maintaining system reliability and compliance requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 36 | V |
| Voltage - Breakdown (Min) | 40 | V |
| Voltage - Clamping (Max) @ Ipp | 58.1 | V |
| Current - Peak Pulse (10/1000µs) | 51.6 | A |
| Power - Peak Pulse | 3000 | W |
| Operating Temperature Range | -55 to 175 | °C |
| Package / Case | DO-214AB, SMC | - |
| Mounting Type | Surface Mount | - |
| Type | Zener | - |
| Bidirectional Channels | 1 | - |
Substitute Part Grouping Explanation
Substitute parts for the SMLJ36CA-TP are classified into two functional groups based on electrical performance compatibility:
Group 1: Direct Electrical Equivalents (51.6A Peak Pulse Current) These parts maintain identical voltage specifications (36V standoff, 40V breakdown minimum, 58.1V clamping maximum) and peak pulse current rating (51.6A), with 3000W peak pulse power dissipation. These substitutes are fully interchangeable from an electrical standpoint:
- SMC3K36CA-M3/57 (Vishay General Semiconductor)
- SMC3K36CAHM3/57 (Vishay General Semiconductor - Automotive qualified)
- SMC30J36CA (STMicroelectronics)
Group 2: Higher Current Capacity Substitutes (86.1A Peak Pulse Current) These parts maintain identical voltage specifications but provide enhanced current handling capability (86.1A peak pulse) with 5000W peak pulse power dissipation. These are suitable for applications requiring higher transient energy absorption:
- 5.0SMDJ36CA (HY Electronic)
- 5.0SMDJ36CA-H (Bourns Inc.)
- 5.0SMDJ36CA-T7 (Littelfuse Inc.)
Group 3: Lower Current Capacity Substitutes (25.8A to 27A Peak Pulse Current) These parts maintain identical voltage specifications but provide reduced current handling capability (25.8A to 27A peak pulse) with 1500W peak pulse power dissipation. These are suitable for lower-energy transient applications:
- 1SMC36CA TR13 PBFREE (Central Semiconductor Corp)
- SMCJ36CA (EVVO Semi)
- SMCJ36CA R7G (Taiwan Semiconductor Corporation)
All substitute parts share the following critical parameters with the main part:
- Voltage - Reverse Standoff: 36V
- Voltage - Breakdown (Min): 40V
- Voltage - Clamping (Max) @ Ipp: 58.1V
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Type: Zener
- Bidirectional Channels: 1
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage Standoff (V) | Voltage Breakdown Min (V) | Voltage Clamping Max (V) | Current Peak Pulse (A) | Power Peak Pulse (W) | Operating Temp (°C) | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMLJ36CA-TP | Micro Commercial Co | 36 | 40 | 58.1 | 51.6 | 3000 | -55 to 175 | DO-214AB, SMC | - |
| 1SMC36CA TR13 PBFREE | Central Semiconductor Corp | 36 | 40 | 58.1 | 25.8 | 1500 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ36CA | HY Electronic (Cayman) Limited | 36 | 40 | 58.1 | 86.1 | 5000 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ36CA-H | Bourns Inc. | 36 | 40 | 58.1 | 86.1 | 5000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ36CA-T7 | Littelfuse Inc. | 36 | 40 | 58.1 | 86.1 | 5000 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMC30J36CA | STMicroelectronics | 36 | 40 | 58.1 | 48.41 | 3000 | -55 to 175 | DO-214AB, SMC | ROHS3 Compliant |
| SMC3K36CA-M3/57 | Vishay General Semiconductor | 36 | 40 | 58.1 | 51.6 | 3000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMC3K36CAHM3/57 | Vishay General Semiconductor | 36 | 40 | 58.1 | 51.6 | 3000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ36CA | EVVO Semi | 36 | 40 | 58.1 | 25.9 | 1500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ36CA R7G | Taiwan Semiconductor Corporation | 36 | 40 | 58.1 | 27 | 1500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Replacement (Identical Electrical Performance)
The SMC3K36CA-M3/57 and SMC3K36CAHM3/57 from Vishay General Semiconductor provide identical electrical specifications to the SMLJ36CA-TP, with 51.6A peak pulse current and 3000W peak pulse power dissipation. Both parts are ROHS3 compliant. The SMC3K36CAHM3/57 variant carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. The SMC30J36CA from STMicroelectronics also provides equivalent performance with the added benefit of extended upper operating temperature range (-55°C to 175°C, matching the original part).
For Enhanced Transient Protection
When application requirements allow for higher transient energy absorption, the 5.0SMDJ36CA series (available from HY Electronic, Bourns, and Littelfuse) provides 86.1A peak pulse current with 5000W peak pulse power dissipation. The 5.0SMDJ36CA-H from Bourns maintains the upper operating temperature of -55°C, matching the original part's thermal range. All three manufacturers in this group provide ROHS3 compliance.
For Cost-Optimized Applications
When application transient energy requirements are lower, the 1SMC36CA TR13 PBFREE from Central Semiconductor Corp and SMCJ36CA from EVVO Semi provide 25.8A to 25.9A peak pulse current with 1500W peak pulse power dissipation. Both are ROHS3 compliant and available in high inventory quantities.
Compliance Considerations
All substitute parts listed are ROHS3 compliant. The original SMLJ36CA-TP does not specify RoHS status in the provided data. All parts share REACH Unaffected or REACH Affected status consistent with the product category. ECCN classification is EAR99 for all parts where specified.
Temperature Range Considerations
The original SMLJ36CA-TP operates from -55°C to 175°C. Most substitute parts operate to -55°C or -65°C minimum, but maximum operating temperature is typically -150°C, except for SMC30J36CA which matches the original at 175°C maximum. Applications requiring the full 175°C upper temperature limit should specify SMC30J36CA or confirm thermal requirements with lower-rated alternatives.
Frequently Asked Questions (FAQ)
Q: Can I use a higher current-rated TVS diode (86.1A) as a substitute for the 51.6A SMLJ36CA-TP?
A: Yes. The 5.0SMDJ36CA series parts (86.1A rating) maintain identical voltage specifications (36V standoff, 40V breakdown, 58.1V clamping) and provide enhanced transient energy absorption capability. Higher current rating does not degrade performance in lower-energy applications; it provides additional margin for transient protection.
Q: Can I use a lower current-rated TVS diode (25.8A) as a substitute for the 51.6A SMLJ36CA-TP?
A: Only if your application's actual transient energy requirements are confirmed to be within the 1500W peak pulse power limit of the lower-rated parts. The 1SMC36CA TR13 PBFREE and SMCJ36CA maintain identical voltage specifications but have reduced current handling. Use only when transient energy analysis confirms compatibility.
Q: What is the difference between SMC3K36CA-M3/57 and SMC3K36CAHM3/57?
A: Both parts are electrically identical with 51.6A peak pulse current and 3000W peak pulse power. The SMC3K36CAHM3/57 carries AEC-Q101 automotive qualification and is designated for automotive applications. Select the automotive variant (CAHM3/57) for automotive-grade designs.
Q: Are all substitute parts available in the same packaging?
A: Yes. All listed substitute parts use DO-214AB (SMC) surface-mount package. Packaging format is consistent across all alternatives, allowing direct PCB footprint compatibility.
Q: What is the significance of the operating temperature range difference?
A: The original SMLJ36CA-TP operates to 175°C maximum. Most substitutes operate to 150°C maximum. For applications requiring operation above 150°C, specify SMC30J36CA (175°C maximum) or confirm that your design operates within the 150°C limit of other alternatives.
Q: Are all substitute parts RoHS compliant?
A: All listed substitute parts are ROHS3 compliant. The original SMLJ36CA-TP does not specify RoHS status in available data. If RoHS compliance is a design requirement, all listed substitutes meet this requirement.
Q: What does "Bidirectional Channels: 1" mean?
A: This indicates the TVS diode provides bidirectional transient voltage suppression on a single signal line, protecting against both positive and negative voltage transients. All listed parts maintain this single-channel bidirectional configuration.
Q: Can I substitute based on peak pulse power rating alone?
A: No. Voltage specifications (standoff, breakdown, and clamping voltages) must match or be compatible with your circuit design. Peak pulse power rating indicates energy absorption capability but does not determine voltage protection level. All parameters in the comparison table must be evaluated together.
Q: What does "Tape & Reel (TR)" packaging mean?
A: Tape & Reel packaging indicates the parts are supplied on continuous tape wound on reels, suitable for automated assembly equipment. This is a supply format distinction and does not affect electrical performance or PCB compatibility compared to Bulk or Cut Tape formats.
Q: Are there any automotive-qualified alternatives to the SMLJ36CA-TP?
A: Yes. The SMC3K36CAHM3/57 from Vishay General Semiconductor carries AEC-Q101 automotive qualification and provides identical electrical specifications (51.6A peak pulse, 3000W peak pulse power) with automotive-grade reliability.
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