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SMLJ36A-TP Equivalent & Substitute Parts
Part Overview
The SMLJ36A-TP is a unidirectional transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 36V reverse standoff voltage with a 58.1V maximum clamping voltage and 51.6A peak pulse current capability in a DO-214AB (SMC) package. The part is active, RoHS3 compliant, and carries unlimited moisture sensitivity level rating. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational specifications to ensure direct functional replacement in circuit designs.
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 |
| Package / Case | DO-214AB, SMC | — |
| Operating Temperature Range | -55 to 175 | °C |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts for the SMLJ36A-TP are classified into two categories based on electrical and mechanical compatibility:
Direct Substitutes maintain identical electrical specifications across all critical parameters: 36V reverse standoff voltage, 40V minimum breakdown voltage, 58.1V maximum clamping voltage, 51.6A peak pulse current, 3000W peak pulse power, and DO-214AB (SMC) package configuration. These parts are interchangeable without circuit modification.
Similar Substitutes share the same voltage ratings and package type but differ in peak pulse current capability (86.1A) and peak pulse power (5000W), or differ in package size (DO-214AC, SMA) with reduced current handling (25.9A) and power dissipation (600W). Selection of similar substitutes requires verification that the application circuit can accommodate the different electrical performance characteristics.
The following parameters determine substitution eligibility:
- Voltage - Reverse Standoff (Typ): 36V
- Voltage - Clamping (Max) @ Ipp: 58.1V
- Package / Case: DO-214AB, SMC (for direct substitutes)
- Unidirectional Channels: 1
- Type: Zener
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown Min (V) | Voltage - Clamping Max @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Package | Operating Temp (°C) | RoHS Status | Substitution Type |
|---|---|---|---|---|---|---|---|---|---|---|
| SMLJ36A-TP | Micro Commercial Co | 36 | 40 | 58.1 | 51.6 | 3000 | DO-214AB, SMC | -55 to 175 | ROHS3 | Main Part |
| 3SMC36A TR13 PBFREE | Central Semiconductor Corp | 36 | 40 | 58.1 | 51.6 | 3000 | DO-214AB, SMC | -65 to 150 | ROHS3 | Direct |
| SMDJ36A | EVVO Semi | 36 | 40 | 58.1 | 51.6 | 3000 | DO-214AB, SMC | Not specified | ROHS3 | Direct |
| TPSMD36A | Littelfuse Inc. | 36 | 40 | 58.1 | 51.6 | 3000 | DO-214AB, SMC | -65 to 150 | ROHS3 | Direct |
| 5.0SMDJ36A | Taiwan Semiconductor Corporation | 36 | 40 | 58.1 | 86.1 | 5000 | DO-214AB, SMC | -55 to 175 | ROHS3 | Similar |
| 5.0SMDJ36A-T7 | Littelfuse Inc. | 36 | 40 | 58.1 | 86.1 | 5000 | DO-214AB, SMC | -65 to 150 | ROHS3 | Similar |
| SMCJ36A | EVVO Semi | 36 | 40 | 58.1 | 25.9 | 600 | DO-214AC, SMA | -65 to 150 | ROHS3 | Similar |
| SMDJ36A-T7 | Littelfuse Inc. | 36 | 40 | 58.1 | 51.6 | 3000 | DO-214AB, SMC | -65 to 150 | ROHS3 | Direct |
| SMLJ36A | Bourns Inc. | 36 | 40 | 58.1 | 51.6 | 3000 | DO-214AB, SMC | -55 to 150 | ROHS3 | Direct |
Engineering Selection Recommendations
Direct Substitutes (3SMC36A TR13 PBFREE, SMDJ36A, TPSMD36A, SMDJ36A-T7, SMLJ36A) are functionally equivalent to the SMLJ36A-TP and provide one-to-one replacement capability. All direct substitutes maintain identical voltage and current specifications with DO-214AB (SMC) package compatibility. Selection among direct substitutes may be based on manufacturer availability, lead time, and compliance certifications. TPSMD36A carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. SMDJ36A-T7 and TPSMD36A are qualified for REACH-affected applications.
Similar Substitutes with enhanced current and power ratings (5.0SMDJ36A, 5.0SMDJ36A-T7) provide higher transient energy absorption capability (5000W versus 3000W) and increased peak pulse current (86.1A versus 51.6A) while maintaining identical voltage specifications. These parts are suitable for applications requiring greater overvoltage protection margin or higher transient energy dissipation. The 5.0SMDJ36A maintains the extended operating temperature range (-55 to 175°C) matching the main part.
Similar Substitutes with reduced current and power ratings (SMCJ36A) feature a smaller DO-214AC (SMA) package with 25.9A peak pulse current and 600W power dissipation. This option is applicable only in space-constrained designs where the reduced protection capability is acceptable for the application requirements.
All substitute parts carry ROHS3 compliance and unlimited moisture sensitivity level rating, matching the main part's environmental specifications.
Frequently Asked Questions (FAQ)
Q: Can I use SMCJ36A as a direct replacement for SMLJ36A-TP?
A: SMCJ36A is not a direct replacement. While it maintains the same 36V reverse standoff and 58.1V clamping voltage, it uses a smaller DO-214AC (SMA) package and provides only 25.9A peak pulse current compared to the 51.6A specification of SMLJ36A-TP. Use SMCJ36A only if your circuit design accommodates reduced current handling and the smaller package footprint.
Q: What is the difference between direct and similar substitutes?
A: Direct substitutes (3SMC36A TR13 PBFREE, SMDJ36A, TPSMD36A, SMDJ36A-T7, SMLJ36A) match all electrical specifications and package configuration of SMLJ36A-TP without modification. Similar substitutes differ in peak pulse current, power dissipation, or package size, requiring circuit verification before implementation.
Q: Is TPSMD36A suitable for automotive applications?
A: Yes. TPSMD36A is qualified to AEC-Q101 automotive standard and carries Littelfuse manufacturing. It maintains identical electrical specifications to SMLJ36A-TP with DO-214AB (SMC) package compatibility.
Q: Can I use 5.0SMDJ36A-T7 in place of SMLJ36A-TP?
A: 5.0SMDJ36A-T7 is a similar substitute with enhanced specifications: 86.1A peak pulse current and 5000W power dissipation versus 51.6A and 3000W for SMLJ36A-TP. It maintains identical voltage ratings and DO-214AB (SMC) package. Use this part if your application requires higher transient energy absorption capability.
Q: What is the operating temperature difference between SMLJ36A-TP and its substitutes?
A: SMLJ36A-TP operates from -55°C to 175°C. Most direct substitutes operate from -65°C to 150°C, providing lower maximum temperature but extended minimum temperature range. The 5.0SMDJ36A and SMLJ36A (Bourns) maintain the -55°C to 175°C range. Verify application temperature requirements before selection.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance matching SMLJ36A-TP specifications.
Q: What packaging options are available for 36V TVS diodes with 51.6A rating?
A: All direct substitutes use DO-214AB (SMC) surface-mount package. SMCJ36A uses the smaller DO-214AC (SMA) package but with reduced 25.9A current rating. Package selection depends on PCB layout constraints and required current handling capability.
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