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SMLJ36AE3/TR13 Transient Voltage Suppressor Diode: Equivalent & Substitute Parts
Part Overview
The SMLJ36AE3/TR13 is an active Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, classified as a unidirectional Zener-type TVS in the DO-214AB surface mount package. This component operates across a junction temperature range of -55°C to 150°C and provides peak pulse power dissipation of 300W. Finding substitute components becomes necessary when the primary part is unavailable due to inventory constraints, supply chain disruptions, or when alternative manufacturers' stock provides superior availability while maintaining equivalent electrical and mechanical performance.
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 | 300 | W |
| Operating Temperature Range | -55°C to 150°C | TJ |
| Package / Case | DO-214AB, SMC | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution logic for the SMLJ36AE3/TR13 is determined by the following critical electrical and mechanical parameters:
Core Substitution Criteria:
- Voltage - Reverse Standoff: 36V (typical)
- Voltage - Breakdown (Min): 40V
- Voltage - Clamping (Max) @ Ipp: 58.1V
- Current - Peak Pulse (10/1000µs): 51.6A minimum
- Package: DO-214AB surface mount configuration
- RoHS3 Compliance
- Moisture Sensitivity Level: 1 (Unlimited)
Direct Substitutes maintain all critical electrical parameters within specified limits and use identical or functionally equivalent packaging. These components share the 51.6A peak pulse current rating and 300W or higher peak pulse power dissipation.
Similar Substitutes are grouped separately when they modify peak pulse current or power dissipation specifications while preserving voltage clamping characteristics. These components are suitable for applications where higher current handling capacity is acceptable.
Parameter Comparison
| Part Number | Manufacturer | Vrwm (V) | V(BR) (V) | Vc (V) | Ipp (A) | Ppk (W) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|
| SMLJ36AE3/TR13 | Microchip Technology | 36 | 40 | 58.1 | 51.6 | 300 | -55 to 150 | DO-214AB |
| 3SMC36A TR13 PBFREE | Central Semiconductor Corp | 36 | 40 | 58.1 | 51.6 | 3000 | -65 to 150 | DO-214AB, SMC |
| SMDJ36A | EVVO Semi | 36 | 40 | 58.1 | 51.6 | — | — | DO-214AB |
| SMLJ36A-TP | Micro Commercial Co | 36 | 40 | 58.1 | 51.6 | 3000 | -55 to 175 | DO-214AB, SMC |
| TPSMD36A | Littelfuse Inc. | 36 | 40 | 58.1 | 51.6 | 3000 | -65 to 150 | DO-214AB, SMC |
| 5.0SMDJ36A | Taiwan Semiconductor Corporation | 36 | 40 | 58.1 | 86.1 | 5000 | -55 to 175 | DO-214AB, SMC |
| 5.0SMDJ36A-T7 | Littelfuse Inc. | 36 | 40 | 58.1 | 86.1 | 5000 | -65 to 150 | DO-214AB, SMC |
| SMCJ36A-13-F | Diodes Incorporated | 36 | 40 | 58.1 | 25.8 | 1500 | -55 to 150 | DO-214AB, SMC |
Engineering Selection Recommendations
Direct Substitutes (Equivalent Current Rating):
The parts 3SMC36A TR13 PBFREE, SMDJ36A, SMLJ36A-TP, and TPSMD36A maintain the 51.6A peak pulse current specification and are classified as direct substitutes. Among these, 3SMC36A TR13 PBFREE (Central Semiconductor Corp) and TPSMD36A (Littelfuse Inc.) offer enhanced power dissipation (3000W vs. 300W) with active product status and full ROHS3 compliance. TPSMD36A carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. SMLJ36A-TP extends the upper operating temperature to 175°C, providing broader thermal operation capability.
Enhanced Performance Alternatives (Higher Current Rating):
The 5.0SMDJ36A (Taiwan Semiconductor Corporation) and 5.0SMDJ36A-T7 (Littelfuse Inc.) are classified as similar substitutes due to increased peak pulse current (86.1A vs. 51.6A) and significantly higher power dissipation (5000W). These components are suitable for applications tolerating enhanced surge current capacity. Both maintain identical voltage clamping specifications. The 5.0SMDJ36A-T7 variant carries full ROHS3 compliance and supports the -65°C lower temperature bound.
Lower Current Alternative:
SMCJ36A-13-F (Diodes Incorporated) is classified as a similar substitute with reduced peak pulse current (25.8A) and 1500W power dissipation. This option is applicable only where design margins allow current de-rating.
Compliance Considerations:
All listed parts carry ROHS3 compliance. TPSMD36A is REACH Affected; remaining parts are REACH Unaffected. MSL rating is 1 (Unlimited) across all parts, indicating no moisture sensitivity constraints during standard assembly processes.
Frequently Asked Questions (FAQ)
Q: Can I substitute the SMLJ36AE3/TR13 with any of the listed parts without circuit redesign?
A: Direct substitutes (3SMC36A TR13 PBFREE, SMDJ36A, SMLJ36A-TP, TPSMD36A) are electrically equivalent within the specified voltage clamping and reverse standoff parameters. No circuit redesign is required for these parts. Similar substitutes with higher current ratings (5.0SMDJ36A, 5.0SMDJ36A-T7) may be used if your circuit topology permits increased surge current handling capacity. Lower current alternatives (SMCJ36A-13-F) require design margin verification.
Q: What is the primary difference between direct and similar substitutes?
A: Direct substitutes maintain the 51.6A peak pulse current and equivalent power dissipation specifications. Similar substitutes alter the peak pulse current or power dissipation parameters while preserving the critical voltage clamping characteristics (36V standoff, 40V breakdown minimum, 58.1V clamping maximum). Component selection depends on whether your application's surge current requirements are met by the specified rating.
Q: Are package and mounting type identical across all substitutes?
A: Yes. All listed substitute parts use the DO-214AB surface mount package configuration and are compatible with standard SMC (DO-214AB) PCB footprints. No PCB redesign is necessary for board assembly compatibility.
Q: Which substitute should I select for automotive applications?
A: TPSMD36A (Littelfuse Inc.) is qualified to AEC-Q101 automotive standards and is recommended for automotive-grade reliability requirements. All other parts are listed as active and ROHS3 compliant but lack automotive qualification notation.
Q: Does RoHS and REACH compliance differ among substitutes?
A: All parts maintain ROHS3 compliance. TPSMD36A is classified as REACH Affected; all other substitute parts are REACH Unaffected. Verify REACH compliance requirements for your specific end-use application and geographic market.
Q: How do temperature operating ranges compare?
A: The SMLJ36AE3/TR13 operates from -55°C to 150°C. SMLJ36A-TP and 5.0SMDJ36A extend the upper limit to 175°C. The 3SMC36A TR13 PBFREE, TPSMD36A, and 5.0SMDJ36A-T7 extend the lower operating temperature to -65°C. Applications requiring the -55°C to 150°C baseline specification are compatible with any listed substitute. Applications requiring extended temperature ranges should select accordingly.
Q: Is inventory availability a consideration for selection?
A: Yes. Inventory quantities are: SMLJ36AE3/TR13 (1,015 pcs), 3SMC36A TR13 PBFREE (3,255 pcs), SMDJ36A (35,100 pcs), SMLJ36A-TP (1,110 pcs), TPSMD36A (5,180 pcs), 5.0SMDJ36A (12,200 pcs), 5.0SMDJ36A-T7 (1,500 pcs), and SMCJ36A-13-F (4,577 pcs). Higher inventory levels provide extended lead time protection.
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