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Vishay General Semiconductor - Diodes Division SM15T12AHE3/57T
- Part No.:
- SM15T12AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12AHE3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM15T12AHE3/57T from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMC (DO-214AB) package, with 12 V standoff voltage (VWM = 10.2 V), 16.7 V clamping voltage at 90 A peak pulse current, and AEC-Q101 qualification for automotive use. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive powertrain and body electronics.
For engineers reviewing the SM15T12AHE3/57T datasheet, SM15T12AHE3/57T pinout, SM15T12AHE3/57T application, or SM15T12AHE3/57T equivalent, key selection criteria include unidirectional polarity, 1500 W 10/1000 μs pulse rating, 10.2 V working voltage, 16.7 V clamping at 90 A, and AEC-Q101 qualification for under-hood automotive deployment.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating when reverse voltage exceeds its breakdown threshold (VBR min = 11.4 V). Its low dynamic impedance ensures rapid response to transients up to 90 A (IPPM), limiting downstream voltage to ≤16.7 V during surge events.
The device uses a glass-passivated silicon junction and is rated for TJ = −65 °C to +150 °C operation. Its SMC package provides low inductance and meets MSL level 1 (260 °C reflow), supporting automated placement in high-reliability automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 10.2 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias margin for protected line. |
| VBR (Breakdown Voltage) | 11.4–12.6 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on above normal operating voltage. |
| VC (Clamping Voltage) | 16.7 V at IPPM = 90 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capability for standardized lightning/transient waveforms; validates robustness per IEC 61000-4-5. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments without derating below 125 °C ambient. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including HTOL, TC, HAST, and ESD testing; required for powertrain and chassis ECUs. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads; informs thermal design for sustained power dissipation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground during overvoltage event; polarity must match system grounding scheme. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping loop; layout must minimize inductance to preserve VC performance. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates protection against IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω source impedance without failure. |
| Glass-passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure in automotive environments. |
| AEC-Q101 qualification (HE3 suffix) | Confirms compliance with automotive stress tests including 1000h HTOL at 150 °C and 1000 cycles temperature cycling (−40 °C to +125 °C). |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), preserving clamping effectiveness at high di/dt. |
| MSL level 1 (260 °C peak) | Supports lead-free reflow soldering without popcorn cracking or delamination; eliminates pre-bake requirement for production assembly. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive I/O Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and MCU I/O pins in 12 V engine control units exposed to load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed across supply rail or signal line to clamp spikes before they reach sensitive logic or power stages. Use Value: Limits transient voltage to ≤16.7 V during 90 A surges, preventing latch-up or oxide breakdown in 3.3 V/5 V microcontrollers and gate drivers. |
Use Scenario: Safeguarding analog sensor inputs (e.g., current shunt monitors) and digital feedback lines in variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on motor controller PCB, absorbing switching noise from IGBTs and contactors. Use Value: Maintains signal integrity by clamping inductive kickback to <17 V, avoiding ADC saturation and false fault triggering in closed-loop control. |
| Automotive Body Electronics | Telecom Power Interface |
|
Use Scenario: Shielding LIN bus transceivers and LED driver ICs in door modules and lighting control units from battery line disturbances. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply input, activated only during >10.2 V transients such as jump-start surges or relay bounce. Use Value: Enables uninterrupted operation during 100 ms load-dump events (ISO 7637-2 Pulse 5a) due to 1500 W pulse handling and +150 °C TJ rating. |
Use Scenario: Protecting PoE-powered Ethernet PHY interfaces and DC-DC converters in outdoor telecom cabinets subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V input rail, coordinated with secondary-side suppression to meet IEC 61000-4-5 Class B immunity. Use Value: Absorbs 1500 W surge energy without short-circuit failure, maintaining system uptime and eliminating need for fuse replacement after transient events. |
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 | Lower PPPM (400 W), same VWM (10.2 V), smaller SMA package (DO-214AC), no AEC-Q101 qualification | Limited to consumer/industrial use; insufficient for automotive load-dump immunity testing | Select SM15T12AHE3/57T when 1500 W surge rating and AEC-Q101 compliance are mandatory. |
| 1.5KE12A | Through-hole DO-201 package, same 12 V rating, 1500 W rating, but higher RθJA (100 °C/W) and no AEC-Q101 | Not suitable for automated SMT lines; requires manual insertion and larger board area | Choose SM15T12AHE3/57T for SMT scalability, thermal performance (RθJA = 75 °C/W), and automotive qualification. |
Compared with SMAJ12A-E3/57T and 1.5KE12A, SM15T12AHE3/57T uniquely delivers AEC-Q101 qualification, SMC package compatibility with high-speed placement, and verified 1500 W clamping performance on automotive-grade thermal pads-making it the only option qualified for under-hood ECU designs requiring zero field returns due to surge failure.
Availability
SM15T12AHE3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive I/O protection, and telecom power interface applications requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for SM15T12AHE3/57T 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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade validation.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where 1500 W surge immunity and AEC-Q101 qualification are critical design requirements.
FAQ
What is the clamping voltage of SM15T12AHE3/57T at its rated peak pulse current?
The SM15T12AHE3/57T has a maximum clamping voltage (VC) of 16.7 V when subjected to its peak pulse current (IPPM) of 90 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C on 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T12AHE3/57T maintains this clamping performance across its full operating temperature range.
Is SM15T12AHE3/57T suitable for automotive applications?
Yes, SM15T12AHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling, and unbiased highly accelerated stress testing (uHAST), making it suitable for engine control units, body control modules, and ADAS power supplies. The SM15T12AHE3/57T is not a generic industrial part-it is validated for under-hood deployment.
What does the "HE3/57T" suffix indicate in SM15T12AHE3/57T?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction with halogen-free molding compound; "57T" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This ordering code ensures traceability to Vishay's automotive-grade production lot controls and qualifies the SM15T12AHE3/57T for use in safety-critical vehicle subsystems requiring documented process consistency.
How does SM15T12AHE3/57T differ from bidirectional TVS diodes like SM15T12CA?
SM15T12AHE3/57T is unidirectional and features a cathode band for polarity-sensitive placement; it conducts surge current only in reverse bias. In contrast, SM15T12CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The SM15T12AHE3/57T is used where DC bias exists (e.g., 12 V supply rails), while SM15T12CA suits AC-coupled or floating signal lines like data buses.
What is the thermal resistance of SM15T12AHE3/57T, and how does it affect layout?
The SM15T12AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures during repetitive surges or elevated ambient conditions, PCB layout must replicate this pad size and ensure solid thermal vias to inner ground planes. Reducing pad area increases RθJA and risks exceeding the +150 °C TJ max rating.
SM15T12AHE3/57T 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:
- 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)
SM15T12AHE3/57T FAQ
1.How can I place an order for SM15T12AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12AHE3/57T 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 SM15T12AHE3/57T reliable?
The price and inventory of SM15T12AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12AHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T12AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12AHE3/57T?
SM15T12AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12AHE3/57T 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 SM15T12AHE3/57T?
For technical support, including SM15T12AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12AHE3/57T requirements.
6.How does Aetrix verify that SM15T12AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T12AHE3/57T 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 SM15T12AHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T12AHE3/57T?
All SM15T12AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12AHE3/57T, 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 SM15T12AHE3/57T part is unused and in its original packaging.
Return procedure for SM15T12AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12AHE3/57T Tags
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