My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T12AHE3/9AT
- Part No.:
- SM15T12AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12AHE3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,487
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T12AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 12 V standoff voltage (VWM = 10.2 V), and clamping voltage of 16.7 V at 90 A peak pulse current. It provides robust protection for automotive-grade sensor signal lines and MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SM15T12AHE3/9AT datasheet, SM15T12AHE3/9AT pinout, SM15T12AHE3/9AT application, or SM15T12AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low-inductance SMC package, and verified clamping performance under 10/1000 μs surge conditions.
Technical Context
The SM15T12AHE3/9AT employs a glass-passivated silicon junction optimized for fast response to transient overvoltages, with breakdown voltage VBR = 11.4–12.6 V at 1.0 mA test current and maximum reverse leakage ID = 5.0 μA at VWM. Its thermal resistance RθJA is 75 °C/W, and it sustains 200 A non-repetitive forward surge current (10 ms half-sine).
This device operates within -65 °C to +150 °C junction temperature range and is qualified per AEC-Q101 for automotive applications. Its failure mode under overstress is short-circuit, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA - Ensures reliable breakdown initiation across process variation |
| VC @ IPPM | 16.7 V at 90.0 A (10/1000 μs) - Limits protected circuit voltage during worst-case surge |
| PPPM | 1500 W - Withstands lightning-induced or motor-switching transients without degradation |
| TJ max | +150 °C - Enables use in under-hood automotive environments with high ambient thermal stress |
| RθJA | 75 °C/W - Defines thermal derating on standard 8 mm × 8 mm copper pads per terminal |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (unidirectional) | Connected to system ground or lower-potential rail during clamping |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line; conducts when transient exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Protects against IEC 61000-4-5 Level 4 surges without derating on standard PCB layout |
| Glass passivated chip junction | Ensures stable VBR and low leakage over lifetime, even in humid or contaminated environments |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time) |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn or delamination risk |
| AEC-Q101 qualification (HE3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS sensor interfaces |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus transceivers and Hall-effect position sensors in engine control modules from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp transients below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 12 V-rated analog front-end ICs during 100 V/500 ms load dump events. |
Use Scenario: Shielding PLC digital input terminals from back-EMF generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input optocoupler inputs to limit voltage to ≤16.7 V during 1 kV/2 Ω surge. Use Value: Maintains functional safety integrity by ensuring optocoupler CMTI remains above 25 kV/μs under surge stress. |
| Automotive Power Supply Rail | Consumer Appliance Control Board |
Use Scenario: Safeguarding 12 V DC-DC converter enable pins and feedback resistors in ADAS camera modules. IC Role / Device Role / Timing Role: Fast-response TVS placed directly at IC pin to suppress sub-100 ns transients induced by nearby high-current switching. Use Value: Eliminates false triggering of undervoltage lockout (UVLO) circuits during ignition transients. |
Use Scenario: Protecting microcontroller GPIOs driving relays in smart washing machine main control boards. IC Role / Device Role / Timing Role: Unidirectional clamping device shunting relay coil flyback energy away from MCU I/O pins. Use Value: Extends MCU field lifetime by preventing cumulative gate oxide damage from repeated 200 V/10 A inductive spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57T | 600 W PPPM, same VWM (10.2 V), higher VC = 19.9 V at 30.1 A | Limited to lower-energy threats (IEC 61000-4-4 Level 3); not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and surge margin requirements. |
| SMCJ12AHE3/9AT | 1500 W PPPM, identical VWM/VC, same AEC-Q101 qualification, but larger SMC package footprint | Same protection level; requires PCB layout revision due to 7.11 mm × 8.13 mm vs. 6.60 mm × 7.75 mm outline | Choose only if existing design uses SMCJ footprint or needs marginally better thermal dissipation (RθJA = 65 °C/W). |
Compared with SMAJ12A-E3/57T and SMCJ12AHE3/9AT, the SM15T12AHE3/9AT delivers identical automotive-grade surge immunity in a smaller SMC outline, enabling higher board density without sacrificing clamping accuracy or thermal robustness.
Availability
SM15T12AHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive I/O protection, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.
Supply support for SM15T12AHE3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance.
The SM15T Series was developed specifically for high-energy transient suppression in automotive and industrial systems where AEC-Q101 compliance, low clamping voltage, and 1500 W surge handling are mandatory.
FAQ
What is the clamping voltage of SM15T12AHE3/9AT at its rated peak pulse current?
The SM15T12AHE3/9AT has a maximum clamping voltage VC of 16.7 V when subjected to a 10/1000 μs waveform at IPPM = 90.0 A. This value is measured under standardized test conditions with 0.31" × 0.31" copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T12AHE3/9AT maintains this clamping performance across its qualified temperature range.
Is SM15T12AHE3/9AT suitable for bidirectional transient protection?
No, SM15T12AHE3/9AT is a unidirectional TVS diode, as indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the CA suffix (e.g., SM15T12CA). Using SM15T12AHE3/9AT in bidirectional applications would result in forward conduction during negative transients, potentially damaging downstream circuitry. Always verify polarity alignment before integrating SM15T12AHE3/9AT into the design.
Does SM15T12AHE3/9AT require heatsinking for 6.5 W continuous power dissipation?
No, the 6.5 W power dissipation rating (PD) for SM15T12AHE3/9AT applies only under infinite heatsink conditions at TA = 50 °C - a theoretical reference condition. In practice, the device relies on PCB copper area for thermal management. With the recommended 8.0 mm × 8.0 mm pad per terminal, SM15T12AHE3/9AT achieves RθJA = 75 °C/W, limiting steady-state power handling to ~0.087 W at 25 °C ambient. SM15T12AHE3/9AT is intended for transient, not continuous, power dissipation.
What does the "HE3" suffix indicate in SM15T12AHE3/9AT?
"HE3" denotes RoHS-compliant construction and AEC-Q101 qualification, distinguishing SM15T12AHE3/9AT from commercial-grade variants (e.g., "E3"). This suffix confirms that the SM15T12AHE3/9AT has passed automotive reliability tests including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing. The "9AT" denotes 13-inch tape-and-reel packaging with 3500 units per reel.
How does SM15T12AHE3/9AT compare to older SMAJ-series TVS diodes in surge handling?
SM15T12AHE3/9AT delivers 1500 W peak pulse power (10/1000 μs), double the 600 W rating of SMAJ12A-E3/57T. Its lower clamping voltage (16.7 V vs. 19.9 V at rated IPPM) and tighter VBR tolerance (±5% vs. ±10%) provide superior protection margin for modern 12 V automotive electronics. Unlike SMAJ devices, SM15T12AHE3/9AT is AEC-Q101 qualified and rated for 150 °C operation, making it suitable for under-hood deployment where SM15T12AHE3/9AT outperforms legacy alternatives.
SM15T12AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 90A
- 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)
SM15T12AHE3/9AT FAQ
1.How can I place an order for SM15T12AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12AHE3/9AT 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 SM15T12AHE3/9AT reliable?
The price and inventory of SM15T12AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T12AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12AHE3/9AT?
SM15T12AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12AHE3/9AT 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 SM15T12AHE3/9AT?
For technical support, including SM15T12AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12AHE3/9AT requirements.
6.How does Aetrix verify that SM15T12AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T12AHE3/9AT 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 SM15T12AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T12AHE3/9AT?
All SM15T12AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12AHE3/9AT, 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 SM15T12AHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T12AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12AHE3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
