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SMLJ26AE3/TR13
Part Overview
The SMLJ26AE3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This surface-mount component in DO-214AB (SMC) package is designed for general-purpose transient voltage protection with a reverse standoff voltage of 26V and clamping voltage of 42.1V at peak pulse current. The part is currently active in production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Alternative equivalent parts exist due to supply chain considerations, design flexibility, and availability across multiple manufacturers.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMLJ26AE3/TR13 |
| Manufacturer | Microchip Technology |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 26V |
| Voltage - Breakdown (Min) | 28.9V |
| Voltage - Clamping (Max) @ Ipp | 42.1V |
| Current - Peak Pulse (10/1000µs) | 71.2A |
| Power - Peak Pulse | 300W |
| Package / Case | DO-214AB, SMC |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the SMLJ26AE3/TR13 are qualified based on the following electrical and mechanical parameters:
Critical matching parameters:
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Breakdown (Min): 28.9V
- Voltage - Clamping (Max) @ Ipp: 42.1V
- Unidirectional Channels: 1
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Type: Zener
Allowable variations:
- Current - Peak Pulse (10/1000µs): 35.6A to 187A
- Power - Peak Pulse: 1500W to 5000W
- Operating Temperature Range: -65°C to 175°C
- Manufacturers: Multiple qualified sources
All substitute parts maintain identical voltage ratings and package configurations while offering different peak pulse current handling and power dissipation capabilities. Selection among substitutes depends on the specific application's transient current magnitude and thermal design requirements.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature Range | Package / Case |
|---|---|---|---|---|---|---|---|---|
| SMLJ26AE3/TR13 | Microchip Technology | 26V | 28.9V | 42.1V | 71.2A | 300W | -55°C ~ 150°C | DO-214AB, SMC |
| 5.0SMDJ26A | Taiwan Semiconductor Corporation | 26V | 28.9V | 42.1V | 119A | 5000W | -55°C ~ 175°C | DO-214AB, SMC |
| 5.0SMDJ26A-T7 | Littelfuse Inc. | 26V | 28.9V | 42.1V | 119A | 5000W | -65°C ~ 150°C | DO-214AB, SMC |
| SMCJ26A | MDD | 26V | 28.9V | 42.1V | 35.7A | 1500W | -50°C ~ 150°C | DO-214AB, SMC |
| SMCJ26A-13-F | Diodes Incorporated | 26V | 28.9V | 42.1V | 35.6A | 1500W | -55°C ~ 150°C | DO-214AB, SMC |
| SMCJ26A-TP | Micro Commercial Co | 26V | 28.9V | 42.1V | 35.7A | 1500W | -55°C ~ 175°C | DO-214AB, SMC |
| SMCJ26A-TR | STMicroelectronics | 26V | 28.9V | 53.5V | 187A | 1500W | -55°C ~ 150°C | DO-214AB, SMC |
| SMDJ26A | Alpha & Omega Semiconductor Inc. | 26V | 28.9V | 42.1V | 71.3A | 3000W | -55°C ~ 150°C | DO-214AB, SMC |
| SMLJ26A | Bourns Inc. | 26V | 28.9V | 42.1V | 71.2A | 3000W | -55°C ~ 150°C | DO-214AB, SMC |
Engineering Selection Recommendations
All listed substitute parts maintain active production status with RoHS3 compliance and REACH unaffected classification. Selection among alternatives should be based on the following criteria:
Exact electrical equivalents (identical 42.1V clamping voltage and 71.2A peak pulse current): SMLJ26A (Bourns Inc.) provides the closest electrical match to the SMLJ26AE3/TR13 with equivalent power dissipation (3000W vs 300W rating) and identical temperature range.
Higher transient current capacity: 5.0SMDJ26A (Taiwan Semiconductor Corporation) and 5.0SMDJ26A-T7 (Littelfuse Inc.) support 119A peak pulse current with expanded 5000W power handling, suitable for applications requiring enhanced transient surge protection.
Lower transient current requirements: SMCJ26A variants (MDD, Diodes Incorporated, Micro Commercial Co) are rated for 35.6–35.7A peak pulse current with 1500W power handling, appropriate for applications with reduced transient magnitude.
Alternative clamping voltage: SMCJ26A-TR (STMicroelectronics) provides higher 53.5V clamping voltage with substantially higher 187A peak pulse current (8/20µs waveform), suitable for different transient suppression profiles.
Temperature range considerations: Applications operating below -55°C should specify 5.0SMDJ26A-T7 (-65°C minimum). Applications requiring extended high-temperature operation above 150°C should specify 5.0SMDJ26A or SMCJ26A-TP (175°C maximum).
Frequently Asked Questions (FAQ)
Q: Can SMCJ26A-TR be used as a direct substitute for SMLJ26AE3/TR13? A: SMCJ26A-TR maintains identical reverse standoff voltage (26V) and breakdown voltage (28.9V) but specifies a higher clamping voltage (53.5V vs 42.1V) and substantially higher peak pulse current (187A at 8/20µs waveform vs 71.2A at 10/1000µs). This part is suitable only if the circuit design accommodates the increased clamping voltage specification.
Q: Are all substitute parts available in the same DO-214AB (SMC) package? A: Yes. All listed substitute parts utilize DO-214AB surface-mount package with identical footprint and land pattern compatibility, enabling direct PCB layout substitution without redesign.
Q: What is the difference between 10/1000µs and 8/20µs pulse waveform specifications? A: These represent different standardized test pulse durations. The 10/1000µs waveform applies to most listed parts, while SMCJ26A-TR uses the 8/20µs waveform. Both specifications characterize peak pulse current capability but under different transient duration conditions. Application compatibility depends on the actual transient pulse shape encountered in the circuit.
Q: Should I select the highest power-rated substitute for maximum protection? A: No. Select a substitute based on the actual transient current magnitude specified in your circuit design. Oversizing power rating without corresponding current requirement increase provides no additional protection benefit and may introduce unnecessary cost and space considerations.
Q: How do I determine which voltage rating substitute (42.1V vs 53.5V clamping) is appropriate? A: The clamping voltage specification determines the maximum voltage the component will permit across the protected circuit node during transient suppression. Selection depends on the protected circuit's maximum allowable voltage. The 42.1V group is appropriate for circuits designed to tolerate up to 42.1V transient clamping; the 53.5V variant is for circuits requiring higher voltage margin.
Q: Are there RoHS and REACH compliance differences among substitutes? A: All listed substitutes carry RoHS3 compliance. SMLJ26A (Bourns Inc.) is REACH Affected; all other substitutes are REACH Unaffected. Verify your specific compliance requirements before final selection.
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