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SMLJ36E3/TR13 Equivalent & Substitute Parts
Part Overview
The SMLJ36E3/TR13 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 36V reverse standoff voltage and provides peak pulse current handling of 46.6A with a maximum clamping voltage of 64.3V. The part is currently active in production and RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).
Equivalent and substitute parts are identified based on matching electrical characteristics within the 36V voltage class, compatible surface-mount packaging (DO-214AB/SMC), and operational temperature ranges suitable for the intended application environment.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 36 | V |
| Voltage - Breakdown (Min) | 40 | V |
| Voltage - Clamping (Max) @ Ipp | 64.3 | V |
| Current - Peak Pulse (10/1000µs) | 46.6 | A |
| Power - Peak Pulse | 300 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SMLJ36E3/TR13 is determined by the following criteria:
Mandatory Matching Parameters:
- Voltage - Reverse Standoff (Typ): 36V
- Voltage - Breakdown (Min): 40V
- Unidirectional Channels: 1
- Type: Zener
- Mounting Type: Surface Mount
- Package / Case: DO-214AB or compatible SMC variant
- RoHS3 Compliance
Allowable Variation Parameters:
- Voltage - Clamping (Max) @ Ipp: Substitute parts may exhibit clamping voltages between 58.1V and 64.3V, provided the part remains within the 36V standoff voltage class
- Current - Peak Pulse (10/1000µs): Substitute parts range from 25.8A to 86.1A; higher current ratings provide enhanced transient protection capability
- Power - Peak Pulse: Substitute parts range from 600W to 5000W; higher power ratings indicate greater energy dissipation capacity
- Operating Temperature Range: Substitute parts maintain minimum -55°C lower bound; upper bound extends to 175°C in certain variants
Substitute parts are grouped into two categories based on current-handling capability: standard-current variants (25.8A–51.6A) and high-current variants (86.1A).
Parameter Comparison
| Part Number | Manufacturer | Voltage Standoff (V) | Voltage Breakdown Min (V) | Voltage Clamp Max (V) | Current Peak Pulse (A) | Power Peak Pulse (W) | Temp Range (°C) | Package | RoHS3 |
|---|---|---|---|---|---|---|---|---|---|
| SMLJ36E3/TR13 | Microchip Technology | 36 | 40 | 64.3 | 46.6 | 300 | -55 to 150 | DO-214AB, SMC | Yes |
| 5.0SMDJ36A | Taiwan Semiconductor Corporation | 36 | 40 | 58.1 | 86.1 | 5000 | -55 to 175 | DO-214AB, SMC | Yes |
| 5.0SMDJ36A-T7 | Littelfuse Inc. | 36 | 40 | 58.1 | 86.1 | 5000 | -65 to 150 | DO-214AB, SMC | Yes |
| SMCJ36A | EVVO Semi | 36 | 40 | 58.1 | 25.9 | 600 | -65 to 150 | DO-214AC, SMA | Yes |
| SMCJ36A-13-F | Diodes Incorporated | 36 | 40 | 58.1 | 25.8 | 1500 | -55 to 150 | DO-214AB, SMC | Yes |
| SMCJ36A-TP | Micro Commercial Co | 36 | 40 | 58.1 | 25.9 | 1500 | -55 to 175 | DO-214AB, SMC | Yes |
| SMDJ36A | EVVO Semi | 36 | 40 | 58.1 | — | — | — | DO-214AB | Yes |
| SMLJ36A | Bourns Inc. | 36 | 40 | 58.1 | 51.6 | 3000 | -55 to 150 | DO-214AB, SMC | Yes |
| SMLJ36A-TP | Micro Commercial Co | 36 | 40 | 58.1 | 51.6 | 3000 | -55 to 175 | DO-214AB, SMC | Yes |
Engineering Selection Recommendations
Standard-Current Substitutes (25.8A–51.6A Peak Pulse):
SMLJ36A and SMLJ36A-TP are direct functional equivalents to the SMLJ36E3/TR13, offering 51.6A peak pulse current and 3000W power dissipation. Both maintain the DO-214AB SMC package and RoHS3 compliance. SMLJ36A-TP extends the upper operating temperature to 175°C, suitable for elevated thermal environments. SMCJ36A-13-F and SMCJ36A-TP provide reduced current handling (25.8A–25.9A) with 1500W power ratings, appropriate for lower-energy transient applications.
High-Current Substitutes (86.1A Peak Pulse):
5.0SMDJ36A and 5.0SMDJ36A-T7 deliver 86.1A peak pulse current and 5000W power dissipation, providing enhanced protection margin for high-energy transient events. Both maintain 36V standoff voltage and DO-214AB SMC packaging. 5.0SMDJ36A-T7 supports extended lower temperature operation (-65°C minimum), beneficial for harsh environmental conditions.
Compliance and Status:
All substitute parts are active production items with RoHS3 compliance and MSL 1 (unlimited moisture sensitivity). Selection should prioritize parts matching the original operating temperature range (-55°C to 150°C) unless application requirements specify extended thermal operation.
Frequently Asked Questions (FAQ)
Q: Can SMCJ36A replace SMLJ36E3/TR13 directly?
A: SMCJ36A maintains matching 36V standoff voltage and 40V breakdown voltage but uses DO-214AC SMA packaging instead of DO-214AB SMC. PCB layout and footprint compatibility must be verified before substitution. Current handling is reduced to 25.9A compared to the original 46.6A.
Q: What is the difference between SMLJ36A and 5.0SMDJ36A?
A: Both are 36V standoff TVS diodes in DO-214AB SMC packages. SMLJ36A provides 51.6A peak pulse and 3000W power dissipation. 5.0SMDJ36A provides 86.1A peak pulse and 5000W power dissipation. Selection depends on transient energy levels in the protected circuit.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry RoHS3 compliance certification and MSL 1 moisture sensitivity rating, matching the original SMLJ36E3/TR13 environmental specifications.
Q: Does operating temperature range affect substitution eligibility?
A: Operating temperature range is an allowable variation parameter. The original part operates -55°C to 150°C. Substitutes extending to 175°C upper limit or -65°C lower limit are acceptable for applications within the original temperature envelope. Extended-range parts provide additional margin for extreme environments.
Q: What is the significance of clamping voltage variation (58.1V vs. 64.3V)?
A: Both clamping voltages fall within acceptable limits for 36V standoff TVS diodes. Lower clamping voltage (58.1V) provides tighter voltage regulation; higher clamping voltage (64.3V) allows greater transient voltage excursion. Circuit protection requirements determine the appropriate selection.
Q: Can SMDJ36A be used as a substitute?
A: SMDJ36A matches the 36V standoff voltage, 40V breakdown voltage, and DO-214AB packaging. Complete electrical specifications (current, power, temperature range) are not fully documented in available data. Verification against detailed datasheets is required before design implementation.
Q: Is packaging compatibility critical for substitution?
A: Yes. The original SMLJ36E3/TR13 uses DO-214AB SMC packaging. Substitute parts using DO-214AC SMA (such as SMCJ36A) require PCB footprint redesign. DO-214AB SMC variants are direct mechanical substitutes without layout modification.
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