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Vishay General Semiconductor - Diodes Division SM15T12A-E3/57T
- Part No.:
- SM15T12A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12A-E3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,647
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Product details
Overview
SM15T12A-E3/57T 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 stand-off voltage (VWM = 10.2 V), 16.7 V clamping voltage at IPPM, and 90 A peak pulse current - used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T12A-E3/57T datasheet, SM15T12A-E3/57T pinout, SM15T12A-E3/57T application, or SM15T12A-E3/57T equivalent, key selection criteria include verified unidirectional polarity, clamping performance under 10/1000 μs surge, thermal resistance (RθJA = 75 °C/W), RoHS-compliant matte tin plating, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 10.2 V, it avalanches to limit transient energy with low-inductance SMC package layout. Its glass-passivated junction ensures stable breakdown and low leakage (ID ≤ 5.0 μA at VWM).
Designed for high-impedance source environments, it sustains non-repetitive 90 A pulses (10/1000 μs) without degradation and fails short-circuit under overstress - a predictable, system-safe failure mode aligned with IEC 61000-4-5 surge immunity requirements.
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 IT = 1.0 mA - precise avalanche threshold for reliable turn-on timing |
| VC @ IPPM | 16.7 V at 90 A (10/1000 μs) - clamping voltage defining worst-case stress on protected IC |
| PPPM | 1500 W - peak surge power handling capability per standard waveform |
| RθJA | 75 °C/W - thermal resistance enabling 6.5 W steady-state dissipation on recommended 8 mm × 8 mm copper pads |
| TJ range | –65 °C to +150 °C - extended temperature operation suitable for under-hood automotive use |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (unidirectional) | Connected to circuit ground or low-side reference; enables forward-biased operation during positive transients |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., 12 V rail or sensor input); conducts reverse surge current to ground when V > VWM |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and motor-switching transients without derating in typical PCB layouts |
| Glass-passivated chip junction | Ensures stable VBR tolerance (±5 %) and low leakage (<5 μA) over lifetime and temperature |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., <100 ns edges), improving clamping fidelity |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 13.5 V. Use Value: Limits rail voltage to ≤16.7 V during 90 A transients, preventing damage to downstream PMICs and microcontrollers. | Use Scenario: Analog output lines from pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Shunt protector on 0–5 V or 4–20 mA signal paths subject to ESD and relay-coil kickback. Use Value: Clamps transients within 1 ns response time while adding <1 pF capacitance, preserving signal integrity up to 100 kHz. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Protection |
Use Scenario: Secondary-side 12 V outputs of AC/DC adapters powering routers or set-top boxes. IC Role / Device Role / Timing Role: Standoff-rated TVS guarding against surge coupling from primary side or external ports. Use Value: Withstands repeated 1500 W pulses without parameter shift, supporting 10-year field reliability in CE-marked equipment. | Use Scenario: -48 V DC power feeds to remote radio units in 4G/5G base stations. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SM15T12CA) not applicable here; this unidirectional part used on grounded-return paths. Use Value: Provides fail-safe short-circuit behavior during lightning surges, enabling upstream fuse coordination and system-level fault isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | 600 W PPPM, same VWM (10.2 V), higher VC (20.1 V @ 30 A), SMA package (higher RθJA) | Limited to lower-energy threats; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when cost or board space constraints outweigh surge margin requirements |
| SMCJ12A | 1500 W PPPM, identical VWM/VC, same SMC package but higher VBR tolerance (±5 % vs ±5 %), same thermal specs | Functionally interchangeable; differs only in manufacturing lot traceability and screening level | Prefer for legacy designs qualified to SMCJ series; no layout change required |
Compared with SMAJ12A and SMCJ12A, SM15T12A-E3/57T delivers identical clamping performance and package thermal behavior as SMCJ12A but with Vishay's TRANSZORB® process assurance, while offering 2.5× the surge capacity of SMAJ12A - critical for automotive and industrial environments where single-event robustness is non-negotiable.
Availability
SM15T12A-E3/57T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog I/O protection, and telecom power supply input stages requiring stable component supply, full RoHS compliance, and traceable sourcing.
Supply support for SM15T12A-E3/57T 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 TVS devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where predictable clamping, fail-safe behavior, and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SM15T12A-E3/57T under a 10/1000 μs surge?
The SM15T12A-E3/57T clamps to a maximum of 16.7 V when subjected to its rated 90 A peak pulse current with a 10/1000 μs waveform. This value is measured across the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T12A-E3/57T maintains this clamping performance consistently due to its glass-passivated junction and low-inductance SMC package.
Is SM15T12A-E3/57T RoHS-compliant and halogen-free?
Yes, SM15T12A-E3/57T carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free versions, select the "M3" suffix variant (e.g., SM15T12A-M3/57T). Both E3 and M3 meet JESD 201 Class 2 whisker resistance and are rated for peak reflow temperatures up to 260 °C.
Does SM15T12A-E3/57T have AEC-Q101 qualification?
No, SM15T12A-E3/57T is commercial-grade and not AEC-Q101 qualified. For automotive-qualified equivalents, specify the "HE3" suffix (e.g., SM15T12AHE3_A/H), which denotes RoHS-compliant, AEC-Q101-qualified parts tested per stress test conditions in the AEC standard. The SM15T12A-E3/57T shares identical electrical and thermal specs but lacks the extended reliability validation required for automotive under-hood use.
What is the maximum reverse leakage current for SM15T12A-E3/57T at rated VWM?
At VWM = 10.2 V and TA = 25 °C, the SM15T12A-E3/57T exhibits a maximum reverse leakage current (ID) of 5.0 μA. This low leakage ensures minimal power loss in standby operation and avoids false triggering in high-impedance sensing circuits. Leakage remains below 50 μA up to +125 °C, supporting stable performance across industrial temperature ranges.
Can SM15T12A-E3/57T be used in bidirectional configurations?
No, SM15T12A-E3/57T is strictly unidirectional, identified by the "A" suffix and cathode band marking. For bidirectional operation, use the "CA" suffix variant (e.g., SM15T12CA), which provides symmetrical clamping in both polarities. Substituting SM15T12A-E3/57T in a bidirectional circuit will result in forward conduction during negative transients, causing failure or incorrect protection behavior.
SM15T12A-E3/57T 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T12A-E3/57T FAQ
1.How can I place an order for SM15T12A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12A-E3/57T 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 SM15T12A-E3/57T reliable?
The price and inventory of SM15T12A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12A-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T12A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12A-E3/57T?
SM15T12A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12A-E3/57T 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 SM15T12A-E3/57T?
For technical support, including SM15T12A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12A-E3/57T requirements.
6.How does Aetrix verify that SM15T12A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T12A-E3/57T 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 SM15T12A-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T12A-E3/57T?
All SM15T12A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12A-E3/57T, 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 SM15T12A-E3/57T part is unused and in its original packaging.
Return procedure for SM15T12A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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