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Vishay General Semiconductor - Diodes Division SM6T12AHE3/52
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- Part No.:
- SM6T12AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12AHE3/52.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,286
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Product details
Overview
SM6T12AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1.0 mA), 10.2 V stand-off voltage (VWM), 16.7 V maximum clamping voltage (VC) at 36 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SM6T12AHE3/52 datasheet, SM6T12AHE3/52 pinout, SM6T12AHE3/52 application, or SM6T12AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, SMB package thermal resistance (RθJA = 100 °C/W), clamping performance under IPPM, and compliance with J-STD-020 MSL Level 1 reflow profile.
Technical Context
The SM6T12AHE3/52 operates as a unidirectional avalanche diode with glass-passivated junction, delivering precise voltage clamping during ESD and load-switching transients. Its low-inductance SMB package and cathode-band polarity marking support high-speed transient response and automated placement in space-constrained PCB layouts.
It is rated for 150 °C maximum junction temperature, 5.0 W steady-state power dissipation on infinite heatsink at 50 °C ambient, and meets AEC-Q101 qualification for automotive-grade reliability. The device exhibits 5.0 μA maximum reverse leakage at 10.2 V and 16.7 V clamping voltage at 36 A (10/1000 μs), enabling robust protection of 12 V rail electronics without overvoltage stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA - defines precise avalanche initiation threshold for reliable clamping onset |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5.0 μA |
| VC @ IPPM | 16.7 V at 36.0 A (10/1000 μs) - limits protected circuit voltage during worst-case surge |
| PPPM | 600 W - peak transient energy absorption capability per single 10/1000 μs pulse |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-ambient industrial environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient air on standard 0.2" × 0.2" copper pads |
| AEC-Q101 | Qualified - validated for automotive electronic modules requiring extended reliability and lifetime testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection to protected line | Reverse-biased during normal operation; conducts when transient exceeds VWM |
| Anode | Low-side reference (typically GND or return path) | Provides current return path during clamping; must be low-impedance to avoid voltage rise |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating in compact layout |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring zero-defect field performance |
| Low-inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns rise time), critical for protecting high-speed logic and sensors |
| MSL Level 1, 260 °C peak reflow | Supports lead-free assembly without pre-baking or special handling in high-volume SMT lines |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and LIN bus inputs from load-dump and inductive switching transients in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed at power entry and signal interface to clamp transients before reaching MCU and transceivers. Use Value: Limits clamped voltage to ≤16.7 V during 36 A surge, preventing latch-up or gate oxide damage in 12 V-rated microcontrollers and LIN transceivers. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Standoff protection device mounted directly at terminal block entry to shunt surge energy to common ground. Use Value: Withstands repetitive 600 W pulses while maintaining <5 μA leakage at 10.2 V, ensuring no false triggering during normal 24 V DC sensing. |
| Consumer Appliance Motor Drive | Telecom Power Supply Clamp |
Use Scenario: Suppressing commutation spikes on brushed DC motor driver outputs in smart home appliances. IC Role / Device Role / Timing Role: Parallel-connected TVS across H-bridge output to clamp inductive kickback during PWM switching. Use Value: Fast avalanche response (<1 ns) and 100 °C/W RθJA allow direct PCB mounting without heatsink, reducing BOM count and board area. |
Use Scenario: Secondary-side transient suppression on 12 V bias rails of PoE-powered telecom switches and routers. IC Role / Device Role / Timing Role: Final-stage clamping element after primary surge protection, guarding PMICs and Ethernet PHYs. Use Value: AEC-Q101 qualification ensures long-term stability in thermally cycled network equipment enclosures with >50,000-hour MTBF requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMB package, 12 V VBR, but lower PPPM = 400 W and non-AEC-Q101 rated | Limited to commercial-grade consumer or industrial applications without automotive qualification requirements | Select SMAJ12A only if AEC-Q101 is not required and surge energy is ≤400 W |
| SMCJ12A | Higher PPPM = 1500 W in larger SMC (DO-214AB) package; same VBR and VC specs | Used where higher surge margin is needed, but requires 30% more PCB area and different pad layout | Choose SMCJ12A when system-level testing shows 600 W insufficient for worst-case ISO 16750-2 load dump events |
Compared with SMAJ12A and SMCJ12A, the SM6T12AHE3/52 uniquely balances AEC-Q101 qualification, 600 W surge capability, and SMB footprint - making it optimal for space-constrained automotive modules needing certified reliability without layout redesign.
Availability
SM6T12AHE3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and telecom power rail protection requiring stable component supply and full traceability.
Supply support for SM6T12AHE3/52 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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SM6T Series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-profile SMB packaging, and consistent clamping performance across temperature.
FAQ
What is the polarity configuration of the SM6T12AHE3/52?
The SM6T12AHE3/52 is a unidirectional TVS diode: the cathode is marked by a band on the SMB package body, and it must be connected anode-to-ground to function correctly. This configuration allows it to clamp positive transients on a 12 V line while blocking reverse current during normal operation. Its unidirectional nature distinguishes it from bidirectional variants like SM6T12CA, which lack polarity marking and suppress both polarities.
Is the SM6T12AHE3/52 qualified for automotive applications?
Yes, the SM6T12AHE3/52 is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024, Doc. #88385). This qualification covers stress tests including HTGB, AC-H3TRB, TC, UHAST, and mechanical shock - validating its suitability for under-hood and cabin-mounted automotive electronics such as body control units and sensor interfaces.
What is the maximum clamping voltage of the SM6T12AHE3/52 under surge conditions?
The SM6T12AHE3/52 has a maximum clamping voltage (VC) of 16.7 V at 36.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring compatibility with 12 V logic and power ICs.
Does the SM6T12AHE3/52 meet RoHS and halogen-free requirements?
Yes, the SM6T12AHE3/52 is RoHS-compliant and halogen-free, as indicated by its HE3 suffix per Vishay's ordering nomenclature. The "HE3" designation specifies RoHS-compliant construction with halogen-free molding compound and matte tin-plated leads, satisfying IPC-1752 and EU Directive 2011/65/EU requirements for environmentally restricted substances.
What is the thermal resistance of the SM6T12AHE3/52 in standard mounting conditions?
The SM6T12AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes or heatsinking, and supports thermal design for continuous power dissipation up to 5.0 W at 50 °C ambient - essential for estimating junction temperature rise in sustained fault conditions.
SM6T12AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, 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):
- 36A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T12AHE3/52 FAQ
1.How can I place an order for SM6T12AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12AHE3/52 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 SM6T12AHE3/52 reliable?
The price and inventory of SM6T12AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T12AHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T12AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12AHE3/52?
SM6T12AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12AHE3/52 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 SM6T12AHE3/52?
For technical support, including SM6T12AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12AHE3/52 requirements.
6.How does Aetrix verify that SM6T12AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T12AHE3/52 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 SM6T12AHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T12AHE3/52?
All SM6T12AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12AHE3/52, 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 SM6T12AHE3/52 part is unused and in its original packaging.
Return procedure for SM6T12AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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