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Vishay General Semiconductor - Diodes Division 1.5SMC12AHE3/9AT
- Part No.:
- 1.5SMC12AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12AHE3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,089
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Product details
Overview
1.5SMC12AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), and clamps transients to ≤16.7 V at 89.8 A peak pulse current (10/1000 µs), delivering 1500 W peak pulse power. It is AEC-Q101 qualified and housed in an SMC (DO-214AB) package, commonly used in automotive sensor interface protection.
For engineers reviewing the 1.5SMC12AHE3/9AT datasheet, 1.5SMC12AHE3/9AT pinout, 1.5SMC12AHE3/9AT application, or 1.5SMC12AHE3/9AT equivalent, key selection criteria include its unidirectional polarity, 1500 W surge rating, AEC-Q101 qualification, low clamping voltage (16.7 V), and compatibility with automated SMT assembly on standard PCB pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 10.2 V), but triggers into low-impedance conduction when reverse voltage exceeds VBR, diverting surge energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns).
The device is rated for 150 °C maximum junction temperature, has a thermal resistance of 75 °C/W (junction-to-ambient, mounted on 8 mm × 8 mm copper pads), and supports repetitive surges at 0.01% duty cycle. Its unidirectional configuration requires cathode-band orientation during layout, with no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise triggering threshold for reliable overvoltage detection |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤16.7 V at 89.8 A - clamping voltage limits stress on protected circuitry during 10/1000 µs surge |
| PPPM | 1500 W - peak transient power handling capability per industry-standard waveform |
| IPPM | 89.8 A - maximum non-repetitive surge current the device can safely clamp |
| TJ max | 150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity indicated by cathode band; unidirectional only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to system ground in typical unidirectional TVS configuration | Provides low-impedance path to ground for transient current when device is reverse-biased beyond VBR |
| Cathode | Current exit terminal during forward conduction; marked with band, connected to protected line | Defines polarity-sensitive placement-must be routed to the line requiring protection (e.g., CAN_H, LIN, sensor supply) |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against severe transients like ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units, body electronics, and ADAS sensors |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter consistency across temperature and life cycles |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT reflow profiles without preconditioning or special handling |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, inductive switching) |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in automotive ECUs from load-dump and ISO 16750-2 transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor signal line and chassis ground. Use Value: Clamps 12 V system transients to ≤16.7 V, preserving ADC input integrity and preventing latch-up in signal-conditioning op-amps. |
Use Scenario: Safeguarding 24 V DC digital inputs on programmable logic controllers exposed to relay coil flyback and field-wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on input terminal block, upstream of optocoupler or Schmitt trigger. Use Value: Absorbs up to 1500 W surge energy while maintaining <5 µA leakage at 10.2 V, ensuring noise-immune logic-level detection. |
| Telecom Line Interface Protection | Consumer Power Supply Clamp |
|
Use Scenario: Secondary-side transient suppression on 12 V bias rails feeding RS-485 transceivers in outdoor telecom equipment. IC Role / Device Role / Timing Role: Unidirectional TVS between VCC and GND, adjacent to transceiver power pins. Use Value: Limits voltage excursions to 16.7 V during lightning-induced surges, preventing damage to ±15 kV ESD-rated transceivers. |
Use Scenario: Overvoltage clamp on 12 V output of wall-adaptor-based SMPS in smart home hubs and audio amplifiers. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output rail, downstream of filtering and upstream of load. Use Value: Responds in <1 ns to secondary-side failures (e.g., feedback loop loss), holding output below 17 V to protect downstream USB-PD controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52T | Lower peak power (600 W), same VWM/VBR, SMB (DO-214AA) package (smaller footprint) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD); not suitable for ISO 7637-2 Pulse 5 | Select when board space is constrained and surge threat level is limited to ESD/lightning-induced coupling only. |
| 1.5KE12A | Through-hole TO-204AE (DO-41) package, identical electrical specs but higher RθJA (100 °C/W) | Requires manual or wave soldering; unsuitable for high-density SMT production or automotive vibration environments | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ12A-E3/52T and 1.5KE12A, the 1.5SMC12AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC package manufacturability-making it the preferred choice for volume automotive and industrial SMT applications demanding high-reliability transient immunity.
Availability
1.5SMC12AHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom line protection, and consumer power supply clamping requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for 1.5SMC12AHE3/9AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where compact size, AEC-Q101 validation, and repeatable clamping behavior are critical.
FAQ
What is the clamping voltage of the 1.5SMC12AHE3/9AT under maximum surge conditions?
The 1.5SMC12AHE3/9AT clamps to a maximum of 16.7 V when subjected to its rated 89.8 A peak pulse current (10/1000 µs waveform). This value is measured at the device terminals under standardized test conditions and represents the upper voltage limit imposed on the protected circuit during worst-case transient events. Designers must ensure downstream components tolerate this clamping level with margin.
Is the 1.5SMC12AHE3/9AT suitable for automotive applications?
Yes-the 1.5SMC12AHE3/9AT carries AEC-Q101 qualification, confirming its suitability for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and validated performance across -65 °C to +150 °C. It is routinely deployed in engine control modules, body control units, and ADAS sensor interfaces where ISO 7637-2 and ISO 16750-2 compliance is required.
How does the 1.5SMC12AHE3/9AT differ from bidirectional TVS diodes like 1.5SMC12CA?
The 1.5SMC12AHE3/9AT is unidirectional and features a cathode band for polarity-sensitive placement, enabling asymmetric protection (e.g., clamping positive transients on a grounded-line system). In contrast, 1.5SMC12CA is bidirectional with symmetrical clamping in both directions and no polarity marking-used where AC-coupled or differential lines require protection against voltage reversals, such as in RS-485 or CAN bus interfaces.
What is the maximum steady-state power dissipation of the 1.5SMC12AHE3/9AT?
The 1.5SMC12AHE3/9AT has a maximum steady-state power dissipation (PD) of 6.5 W at 50 °C ambient temperature with infinite heatsink conditions. In real-world PCB layouts using the recommended 8 mm × 8 mm copper pads per terminal, derating applies above 25 °C per Figure 2 in the datasheet-ensuring safe operation within thermal limits during continuous leakage or low-duty-cycle surges.
Does the 1.5SMC12AHE3/9AT require external series impedance for optimal protection?
No-the 1.5SMC12AHE3/9AT functions as a self-limiting shunt device and does not require external series impedance to operate. However, adding a small series resistor (e.g., 1–10 Ω) or ferrite bead between the protected node and the TVS anode can reduce ringing and improve system-level EMI performance during transient events-especially in high-speed signal paths where sub-nanosecond response may couple noise.
1.5SMC12AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC12AHE3/9AT FAQ
1.How can I place an order for 1.5SMC12AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12AHE3/9AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5SMC12AHE3/9AT reliable?
The price and inventory of 1.5SMC12AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC12AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12AHE3/9AT?
1.5SMC12AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12AHE3/9AT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5SMC12AHE3/9AT?
For technical support, including 1.5SMC12AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC12AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12AHE3/9AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5SMC12AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC12AHE3/9AT?
All 1.5SMC12AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12AHE3/9AT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5SMC12AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC12AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12AHE3/9AT Tags
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