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1SMA36AT3G Equivalent & Substitute Parts
Part Overview
The 1SMA36AT3G is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AC (SMA) surface mount package. This component is rated for 36V reverse standoff voltage with a 58.1V maximum clamping voltage and 6.9A peak pulse current. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued circuit design and production support.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 36V |
| Voltage - Breakdown (Min) | 40V |
| Voltage - Clamping (Max) @ Ipp | 58.1V |
| Current - Peak Pulse (10/1000µs) | 6.9A |
| Power - Peak Pulse | 400W |
| Package / Case | DO-214AC, SMA |
| Mounting Type | Surface Mount |
| Type | Zener |
| Unidirectional Channels | 1 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the 1SMA36AT3G is determined by strict equivalence across the following electrical and mechanical parameters:
- Voltage - Reverse Standoff: 36V
- Voltage - Clamping (Max) @ Ipp: 58.1V
- Current - Peak Pulse (10/1000µs): 6.9A minimum
- Power - Peak Pulse: 400W minimum
- Package / Case: DO-214AC, SMA
- Mounting Type: Surface Mount
- Type: Zener, Unidirectional
Substitute parts are grouped into two categories based on these criteria:
Category A - Direct Electrical Equivalents (58.1V Clamp, 6.9A Ipp): Parts maintaining identical clamping voltage and peak pulse current specifications.
Category B - Enhanced Performance Equivalents (58.1V Clamp, Higher Ipp): Parts with identical clamping voltage but increased peak pulse current capacity, providing superior transient protection margin.
Category C - Alternative Clamping Voltage (64.3V Clamp): Parts with higher clamping voltage that may be used in applications where additional voltage margin is acceptable.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Package / Case | Product Status | Operating Temperature |
|---|---|---|---|---|---|---|---|---|
| 1SMA36AT3G | Littelfuse Inc. | 36V | 58.1V | 6.9A | 400W | DO-214AC, SMA | Obsolete | -65°C ~ 150°C (TJ) |
| SMAJ36A | MDD | 36V | 58.1V | 6.9A | 400W | DO-214AC, SMA | Active | -50°C ~ 150°C (TJ) |
| SMAJ36A-13-F | Diodes Incorporated | 36V | 58.1V | 6.9A | 400W | DO-214AC, SMA | Active | -55°C ~ 150°C (TJ) |
| SMAJ36A-E3/61 | Vishay General Semiconductor - Diodes Division | 36V | 58.1V | 6.9A | 400W | DO-214AC, SMA | Active | -55°C ~ 150°C (TJ) |
| SMAJ36A-M3/61 | Vishay General Semiconductor - Diodes Division | 36V | 58.1V | 6.9A | 400W | DO-214AC, SMA | Active | -55°C ~ 150°C (TJ) |
| SMAJ36A-TP | Micro Commercial Co | 36V | 58.1V | 6.9A | 400W | DO-214AC, SMA | Active | -55°C ~ 175°C (TA) |
| SMAJ36AE3/TR13 | Microchip Technology | 36V | 58.1V | 8.6A | 500W | DO-214AC, SMA | Active | -65°C ~ 150°C (TJ) |
| SMAJ36E3/TR13 | Microchip Technology | 36V | 64.3V | 9.8A | 500W | DO-214AC, SMA | Active | -65°C ~ 150°C (TJ) |
| TV04A360J-G | Comchip Technology | 36V | 58.1V | 6.88A | 400W | DO-214AC, SMA | Active | -55°C ~ 150°C (TJ) |
Engineering Selection Recommendations
Primary Substitutes (Direct Equivalents):
SMAJ36A-13-F (Diodes Incorporated), SMAJ36A-E3/61 (Vishay), SMAJ36A-M3/61 (Vishay), and TV04A360J-G (Comchip Technology) are direct electrical and mechanical equivalents. All maintain 36V reverse standoff, 58.1V clamping voltage, and 6.9A peak pulse current in the DO-214AC (SMA) package. All are active products with ROHS3 compliance and MSL 1 rating. These parts are suitable for direct replacement in existing designs.
Enhanced Performance Alternative:
SMAJ36AE3/TR13 (Microchip Technology) provides identical 58.1V clamping voltage with increased 8.6A peak pulse current and 500W power rating. This part offers superior transient protection margin and is recommended for applications requiring enhanced surge handling capability. Operating temperature range extends to -65°C, matching the original 1SMA36AT3G specification.
Alternative Clamping Voltage:
SMAJ36E3/TR13 (Microchip Technology) operates at 64.3V clamping voltage with 9.8A peak pulse current and 500W power rating. This part is suitable only for applications where higher clamping voltage is acceptable and does not create circuit compatibility issues.
Secondary Alternative:
SMAJ36A (MDD) is an active product with identical electrical specifications but operates over -50°C to 150°C temperature range, which is narrower than the original part. This part is suitable for applications within this temperature window.
Frequently Asked Questions (FAQ)
Q: Can SMAJ36A-13-F replace 1SMA36AT3G directly?
A: Yes. SMAJ36A-13-F maintains identical electrical parameters (36V standoff, 58.1V clamp, 6.9A peak pulse) and package configuration (DO-214AC, SMA). Both are ROHS3 compliant with MSL 1 rating. Direct substitution is supported.
Q: What is the difference between SMAJ36A-E3/61 and SMAJ36A-M3/61?
A: Both parts are manufactured by Vishay and maintain identical electrical specifications. The designations reflect different manufacturing codes and tape/reel configurations. Electrical performance and package are equivalent.
Q: Why is SMAJ36AE3/TR13 listed as an alternative?
A: SMAJ36AE3/TR13 provides enhanced performance with 8.6A peak pulse current versus 6.9A in the original part, while maintaining identical 58.1V clamping voltage. This allows for superior transient suppression in the same package footprint. It is a compatible upgrade for applications requiring additional protection margin.
Q: Can SMAJ36E3/TR13 be used as a substitute?
A: SMAJ36E3/TR13 operates at 64.3V clamping voltage, which is higher than the original 58.1V specification. Substitution is only appropriate if the application circuit can tolerate this higher clamping voltage without adverse effects on downstream components or circuit operation.
Q: Are all substitute parts available in tape and reel packaging?
A: Packaging configurations vary by manufacturer and part number. SMAJ36A-13-F, SMAJ36A-E3/61, SMAJ36A-M3/61, SMAJ36AE3/TR13, SMAJ36E3/TR13, and TV04A360J-G are specified as Tape & Reel (TR). SMAJ36A (MDD) packaging is not specified in the provided data. Verify packaging availability with the supplier for your specific procurement requirements.
Q: What is the operating temperature consideration for SMAJ36A-TP?
A: SMAJ36A-TP operates over -55°C to 175°C (TA), providing the widest ambient temperature range among the listed substitutes. This part is suitable for applications requiring extended high-temperature operation beyond the standard -55°C to 150°C range.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original 1SMA36AT3G specifications.
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