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1SMA6.0AT3G Equivalent & Substitute Parts
Part Overview
The 1SMA6.0AT3G 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 6V reverse standoff voltage with a 10.3V maximum clamping voltage and 38.8A peak pulse current capability. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued circuit protection applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 1SMA6.0AT3G |
| Manufacturer | Littelfuse Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 6V |
| Voltage - Breakdown (Min) | 6.67V |
| Voltage - Clamping (Max) @ Ipp | 10.3V |
| Current - Peak Pulse (10/1000µs) | 38.8A |
| Power - Peak Pulse | 400W |
| Package / Case | DO-214AC, SMA |
| Mounting Type | Surface Mount |
| Operating Temperature | -65°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the 1SMA6.0AT3G is determined by strict equivalence across the following electrical and mechanical parameters:
- Voltage - Reverse Standoff (Typ): 6V
- Voltage - Breakdown (Min): 6.67V
- Voltage - Clamping (Max) @ Ipp: 10.3V
- Current - Peak Pulse (10/1000µs): 38.8A
- Power - Peak Pulse: 400W
- Package / Case: DO-214AC, SMA
- Mounting Type: Surface Mount
- Unidirectional Channels: 1
- Type: Zener
Substitute parts are grouped into two categories based on manufacturer recommendation status and product availability:
Primary Equivalents (MFR Recommended): SMAJ6.0A (MDD), P4SMAJ6.0A_R1_00001 (Panjit International Inc.)
Direct Equivalents (Active Status): SMAJ6.0A-13-F (Diodes Incorporated), SMAJ6.0A-E3/5A (Vishay), SMAJ6.0A-E3/61 (Vishay), SMAJ6.0A-M3/5A (Vishay), SMAJ6.0A-M3/61 (Vishay), SMAJ6.0A-TP (Micro Commercial Co)
Partial Equivalent (Different Clamping Voltage): SMA6J6.0A-TR (STMicroelectronics) — 13.7V clamping voltage instead of 10.3V
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 | Package / Case | Operating Temperature | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| 1SMA6.0AT3G | Littelfuse Inc. | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -65°C ~ 150°C (TJ) | Obsolete |
| SMAJ6.0A | MDD | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -50°C ~ 150°C (TJ) | Active |
| SMAJ6.0A-13-F | Diodes Incorporated | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -55°C ~ 150°C (TJ) | Active |
| SMAJ6.0A-E3/5A | Vishay General Semiconductor - Diodes Division | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -55°C ~ 150°C (TJ) | Active |
| SMAJ6.0A-E3/61 | Vishay General Semiconductor - Diodes Division | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -55°C ~ 150°C (TJ) | Active |
| SMAJ6.0A-M3/5A | Vishay General Semiconductor - Diodes Division | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -55°C ~ 150°C (TJ) | Active |
| SMAJ6.0A-M3/61 | Vishay General Semiconductor - Diodes Division | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -55°C ~ 150°C (TJ) | Active |
| SMAJ6.0A-TP | Micro Commercial Co | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -55°C ~ 175°C (TA) | Active |
| P4SMAJ6.0A_R1_00001 | Panjit International Inc. | 6V | 6.67V | 10.3V | 38.8A | 400W | DO-214AC, SMA | -55°C ~ 150°C (TJ) | Active |
| SMA6J6.0A-TR | STMicroelectronics | 6V | 6.7V | 13.7V | 290A (8/20µs) | 600W | DO-214AC, SMA | -55°C ~ 175°C (TJ) | Active |
Engineering Selection Recommendations
Full Electrical and Mechanical Equivalents: SMAJ6.0A (MDD), SMAJ6.0A-13-F (Diodes Incorporated), SMAJ6.0A-E3/5A (Vishay), SMAJ6.0A-E3/61 (Vishay), SMAJ6.0A-M3/5A (Vishay), SMAJ6.0A-M3/61 (Vishay), SMAJ6.0A-TP (Micro Commercial Co), and P4SMAJ6.0A_R1_00001 (Panjit International Inc.) are direct substitutes. All maintain identical voltage ratings, current ratings, power dissipation, and package specifications. All substitute parts are ROHS3 compliant with MSL 1 rating. Product status is active for all equivalents, ensuring long-term availability and supply chain continuity.
Partial Equivalent with Design Consideration: SMA6J6.0A-TR (STMicroelectronics) differs in clamping voltage (13.7V vs. 10.3V) and peak pulse current (290A at 8/20µs vs. 38.8A at 10/1000µs). This part is suitable only if circuit design permits higher clamping voltage and the different pulse waveform specification is acceptable.
Recommended Primary Selections: SMAJ6.0A (MDD) and P4SMAJ6.0A_R1_00001 (Panjit International Inc.) are designated as manufacturer-recommended equivalents with confirmed inventory availability and active product status.
Frequently Asked Questions (FAQ)
Q: Can SMAJ6.0A-TP replace 1SMA6.0AT3G directly?
A: Yes. SMAJ6.0A-TP maintains all critical electrical parameters: 6V reverse standoff, 10.3V clamping voltage, 38.8A peak pulse current, and 400W power dissipation. The operating temperature range extends to 175°C (TA) compared to the original 150°C (TJ), providing enhanced thermal margin. Package and mounting type are identical (DO-214AC, SMA surface mount).
Q: What is the difference between SMAJ6.0A variants from Vishay (E3/5A, E3/61, M3/5A, M3/61)?
A: The suffix designations indicate different tape and reel configurations and manufacturing dates. All four variants are electrically and mechanically identical, with identical voltage ratings, current ratings, and package specifications. Selection depends on procurement requirements and reel quantity preferences.
Q: Why is SMA6J6.0A-TR listed as a substitute if it has different electrical parameters?
A: SMA6J6.0A-TR is listed as a partial equivalent only. It differs in clamping voltage (13.7V vs. 10.3V) and peak pulse current specification (290A at 8/20µs vs. 38.8A at 10/1000µs). This part is suitable only for applications where the higher clamping voltage does not compromise circuit protection requirements and the different pulse waveform specification is acceptable for the intended application.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original 1SMA6.0AT3G specifications.
Q: What is the minimum operating temperature difference between the original part and substitutes?
A: The original 1SMA6.0AT3G operates from -65°C to 150°C (TJ). Most substitutes operate from -55°C to 150°C (TJ), representing a 10°C reduction in minimum operating temperature. SMAJ6.0A-TP extends to -55°C to 175°C (TA). For applications requiring operation below -55°C, the original specification must be verified against circuit requirements.
Q: Can I use SMAJ6.0A (MDD) in high-volume production?
A: Yes. SMAJ6.0A (MDD) is designated as a manufacturer-recommended equivalent with 20,400 pcs inventory availability and active product status, supporting high-volume production requirements.
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