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1SMC9.0AT3 Equivalent & Substitute Parts
Part Overview
The 1SMC9.0AT3 is a unidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 9V reverse standoff voltage with 15.4V maximum clamping voltage and 97.4A peak pulse current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part is housed in a DO-214AB (SMC) surface mount package and is suitable for general-purpose transient voltage suppression applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 1SMC9.0AT3 |
| Manufacturer | onsemi |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 9V |
| Voltage - Breakdown (Min) | 10V |
| Voltage - Clamping (Max) @ Ipp | 15.4V |
| Current - Peak Pulse (10/1000µs) | 97.4A |
| Power - Peak Pulse | 1500W (1.5kW) |
| Operating Temperature | -65°C ~ 150°C (TJ) |
| Package / Case | DO-214AB, SMC |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the 1SMC9.0AT3 are selected based on the following critical electrical and mechanical parameters:
Primary Matching Criteria:
- Voltage - Reverse Standoff: 9V (exact match required)
- Voltage - Clamping (Max) @ Ipp: 15.4V (exact match required)
- Current - Peak Pulse (10/1000µs): 97.4A (exact match required)
- Power - Peak Pulse: 1500W (exact match required)
- Package / Case: DO-214AB, SMC (exact match required)
- Type: Zener, Unidirectional (exact match required)
Secondary Consideration:
- Operating Temperature range compatibility
- RoHS compliance status (for new designs)
- Product status (Active preferred over Obsolete)
Substitute parts meeting all primary criteria are functionally equivalent for direct replacement in the same circuit application. Parts with identical electrical specifications but different manufacturers or packaging variants (Tape & Reel) are considered direct substitutes.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package / Case | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| 1SMC9.0AT3 | onsemi | 9V | 15.4V | 97.4A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Obsolete | RoHS non-compliant |
| SMCJ9.0A | Taiwan Semiconductor Corporation | 9V | 15.4V | 102A | 1500W | -55°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ9.0A-13-F | Diodes Incorporated | 9V | 15.4V | 97.4A | 1500W | -55°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ9.0A-HR | Littelfuse | 9V | 15.4V | 97.4A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ9.0A-HRA | Littelfuse Inc. | 9V | 15.4V | 97.4A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ9.0A-HRAT7 | Littelfuse Inc. | 9V | 15.4V | 97.4A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ9.0A-M3/57T | Vishay General Semiconductor - Diodes Division | 9V | 15.4V | 97.4A | 1500W | -55°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ9.0A-M3/9AT | Vishay General Semiconductor - Diodes Division | 9V | 15.4V | 97.4A | 1500W | -55°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ9.0AE3/TR13 | Microchip Technology | 9V | 15.4V | 97.4A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ8.5A-13-F | Diodes Incorporated | 8.5V | 14.4V | 104.2A | 1500W | -55°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Equivalents (Identical Electrical Specifications):
Parts meeting all primary matching criteria with identical 9V reverse standoff, 15.4V clamping voltage, and 97.4A peak pulse current are: SMCJ9.0A-13-F (Diodes Incorporated), SMCJ9.0A-HR (Littelfuse), SMCJ9.0A-HRA (Littelfuse Inc.), SMCJ9.0A-HRAT7 (Littelfuse Inc.), SMCJ9.0A-M3/57T (Vishay), SMCJ9.0A-M3/9AT (Vishay), and SMCJ9.0AE3/TR13 (Microchip Technology). All are Active status products with ROHS3 compliance, providing improved regulatory alignment compared to the obsolete 1SMC9.0AT3.
Near-Equivalent Alternative:
SMCJ9.0A (Taiwan Semiconductor Corporation) matches all primary electrical specifications with 102A peak pulse current (within acceptable tolerance of 97.4A) and is Active status with ROHS3 compliance. Operating temperature range is -55°C to 150°C versus the original -65°C to 150°C.
Marginal Substitute (Different Electrical Specifications):
SMCJ8.5A-13-F (Diodes Incorporated) has a lower reverse standoff voltage of 8.5V and lower clamping voltage of 14.4V, with higher peak pulse current of 104.2A. This part does not meet primary matching criteria and is not recommended as a direct substitute.
Temperature Consideration:
For applications requiring the full -65°C to 150°C operating range of the original 1SMC9.0AT3, select SMCJ9.0A-HR, SMCJ9.0A-HRA, SMCJ9.0A-HRAT7, or SMCJ9.0AE3/TR13. Parts with -55°C to 150°C range are suitable for applications not requiring extended low-temperature operation.
Frequently Asked Questions (FAQ)
Q: Can SMCJ9.0A be used as a direct replacement for 1SMC9.0AT3?
A: SMCJ9.0A is functionally equivalent with matching 9V reverse standoff and 15.4V clamping voltage specifications. The peak pulse current is 102A versus 97.4A, which is within acceptable tolerance for the same power dissipation rating of 1500W. The operating temperature range is -55°C to 150°C instead of -65°C to 150°C. For applications not requiring operation below -55°C, SMCJ9.0A is a suitable substitute.
Q: What is the difference between SMCJ9.0A-13-F and SMCJ9.0A-HR?
A: Both parts have identical electrical specifications (9V reverse standoff, 15.4V clamping, 97.4A peak pulse). SMCJ9.0A-13-F is manufactured by Diodes Incorporated with -55°C to 150°C operating range. SMCJ9.0A-HR is manufactured by Littelfuse with -65°C to 150°C operating range. Selection depends on temperature requirements and preferred supplier.
Q: Why is SMCJ8.5A-13-F listed if it has different voltage specifications?
A: SMCJ8.5A-13-F has a lower reverse standoff voltage (8.5V) and lower clamping voltage (14.4V) than the 1SMC9.0AT3 (9V and 15.4V respectively). This part does not meet the primary electrical matching criteria and is not recommended as a substitute for this application.
Q: Are all substitute parts RoHS compliant?
A: All listed substitute parts are ROHS3 compliant, whereas the original 1SMC9.0AT3 is RoHS non-compliant. This provides regulatory advantage for new designs and procurement.
Q: Does packaging variant (Tape & Reel) affect substitution?
A: Packaging variants such as Tape & Reel (TR) designation indicate different delivery format but do not affect electrical performance or PCB compatibility. The DO-214AB (SMC) package footprint remains identical across all substitute parts.
Q: Which substitute part has the widest operating temperature range?
A: SMCJ9.0A-HR, SMCJ9.0A-HRA, SMCJ9.0A-HRAT7, and SMCJ9.0AE3/TR13 all support -65°C to 150°C operating temperature, matching the original 1SMC9.0AT3 specification.
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