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SMLJ7.0AE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMLJ7.0AE3/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 7V reverse standoff voltage and 12V maximum clamping voltage, capable of handling 250A peak pulse current with 300W peak pulse power dissipation. The device is packaged in DO-214AB (SMC) format and is RoHS3 compliant with unlimited moisture sensitivity rating.
Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified manufacturers offering comparable electrical and mechanical characteristics within the same package family.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 7 | V |
| Voltage - Breakdown (Min) | 7.78 | V |
| Voltage - Clamping (Max) @ Ipp | 12 | V |
| Current - Peak Pulse (10/1000µs) | 250 | A |
| Power - Peak Pulse | 300 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AB, SMC | — |
| Mounting Type | Surface Mount | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SMLJ7.0AE3/TR13 is determined by strict equivalence across the following critical parameters:
Mandatory Matching Parameters:
- Voltage - Reverse Standoff (Typ): 7V
- Voltage - Clamping (Max) @ Ipp: 12V
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Type: Zener
- Unidirectional Channels: 1
- Applications: General Purpose
Allowable Variation Parameters:
- Current - Peak Pulse (10/1000µs): 125A to 250A (higher current ratings are acceptable for same voltage class)
- Power - Peak Pulse: 1500W to 3000W (higher power ratings are acceptable)
- Operating Temperature Range: Minimum -55°C acceptable; maximum 150°C to 175°C acceptable
- Manufacturer: Multiple qualified sources permitted
- RoHS Status: ROHS3 Compliant required
Substitute parts meeting these criteria maintain functional compatibility while permitting sourcing flexibility across multiple manufacturers including Bourns Inc., MDD, Diodes Incorporated, Micro Commercial Co, Alpha & Omega Semiconductor Inc., and Comchip Technology.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temp (°C) | Package |
|---|---|---|---|---|---|---|---|
| SMLJ7.0AE3/TR13 | Microchip Technology | 7 | 12 | 250 | 300 | -55 to 150 | DO-214AB, SMC |
| SMLJ7.0A | Bourns Inc. | 7 | 12 | 250 | 3000 | -55 to 150 | DO-214AB, SMC |
| SMCJ7.0A | MDD | 7 | 12 | 125 | 1500 | -50 to 150 | DO-214AB, SMC |
| SMCJ7.0A-13-F | Diodes Incorporated | 7 | 12 | 125 | 1500 | -55 to 150 | DO-214AB, SMC |
| SMCJ7.0A-TP | Micro Commercial Co | 7 | 12 | 125 | 1500 | -55 to 175 | DO-214AB, SMC |
| SMDJ7.0A | Alpha & Omega Semiconductor Inc. | 7 | 12 | 250 | 3000 | -55 to 150 | DO-214AB, SMC |
| TV15C7V0J-HF | Comchip Technology | 7 | 12 | 125 | 1500 | -55 to 150 | DO-214AB, SMC |
Engineering Selection Recommendations
Direct Equivalents (Highest Compatibility):
SMLJ7.0A (Bourns Inc.) and SMDJ7.0A (Alpha & Omega Semiconductor Inc.) are direct functional equivalents to the SMLJ7.0AE3/TR13. Both parts maintain identical voltage specifications (7V standoff, 12V clamping), identical peak pulse current (250A), and identical operating temperature range (-55°C to 150°C). Both are RoHS3 compliant and active products. SMLJ7.0A offers 3000W peak pulse power versus the original 300W specification, providing enhanced margin. SMDJ7.0A similarly provides 3000W peak pulse power. Both are suitable for direct substitution without circuit redesign.
Compatible Alternatives (Reduced Current Rating):
SMCJ7.0A (MDD), SMCJ7.0A-13-F (Diodes Incorporated), SMCJ7.0A-TP (Micro Commercial Co), and TV15C7V0J-HF (Comchip Technology) are compatible alternatives with identical voltage specifications but reduced peak pulse current ratings (125A versus 250A original). These parts are suitable for applications where the transient current requirement does not exceed 125A. All maintain the 12V clamping voltage and DO-214AB package format. Operating temperature ranges are acceptable: SMCJ7.0A-13-F and TV15C7V0J-HF match the original -55°C to 150°C range; SMCJ7.0A-TP extends to 175°C; SMCJ7.0A operates from -50°C. All are RoHS3 compliant and active products.
Selection Criteria:
- For applications requiring 250A peak pulse current capacity: select SMLJ7.0A or SMDJ7.0A
- For applications with peak pulse current ≤125A: any of the SMCJ7.0A variants or TV15C7V0J-HF are acceptable
- For extended temperature operation to 175°C: select SMCJ7.0A-TP
- For standard temperature range (-55°C to 150°C): all listed parts are acceptable
All substitute parts are active products with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Frequently Asked Questions (FAQ)
Q: Can SMCJ7.0A-13-F replace SMLJ7.0AE3/TR13 in my circuit?
A: SMCJ7.0A-13-F is compatible if your circuit's transient current requirement does not exceed 125A. The part maintains identical 7V standoff and 12V clamping voltages, operates within the same temperature range (-55°C to 150°C), and uses the same DO-214AB package. If your application requires 250A peak pulse current handling, use SMLJ7.0A or SMDJ7.0A instead.
Q: What is the difference between SMLJ7.0A and SMDJ7.0A?
A: Both parts are direct equivalents with identical electrical specifications: 7V standoff, 12V clamping, 250A peak pulse current, 3000W peak pulse power, and -55°C to 150°C operating range. The primary difference is manufacturer: SMLJ7.0A is manufactured by Bourns Inc., while SMDJ7.0A is manufactured by Alpha & Omega Semiconductor Inc. Both are RoHS3 compliant and active products suitable for direct substitution.
Q: Why does SMLJ7.0AE3/TR13 specify 300W peak pulse power while SMLJ7.0A specifies 3000W?
A: Both parts handle identical peak pulse current (250A) and voltage (12V clamping). The higher power specification in SMLJ7.0A reflects the manufacturer's rating methodology and provides additional thermal margin. This does not affect substitution compatibility; SMLJ7.0A is a suitable replacement.
Q: Are all substitute parts available in the same DO-214AB package?
A: Yes. All listed substitute parts use DO-214AB (SMC) package format, ensuring mechanical and electrical compatibility with the original SMLJ7.0AE3/TR13 footprint and PCB layout.
Q: Can I use SMCJ7.0A-TP if my application operates at 175°C?
A: Yes. SMCJ7.0A-TP is rated for -55°C to 175°C operating temperature, extending 25°C above the original specification. This part is suitable for high-temperature applications. However, verify that your circuit design accommodates the reduced peak pulse current (125A) if applicable.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts are RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the original SMLJ7.0AE3/TR13 compliance status.
Q: What is the minimum peak pulse current I should consider for substitution?
A: Substitution is valid only for parts rated 125A or higher. All listed alternatives meet this threshold. Select based on your circuit's actual transient current requirement: use 250A-rated parts (SMLJ7.0A, SMDJ7.0A) for applications requiring that capacity, or 125A-rated parts for lower-current applications.
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