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Vishay General Semiconductor - Diodes Division SM6T15AHM3/H
- Part No.:
- SM6T15AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15AHM3/H.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,567
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Product details
Overview
SM6T15AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 12.8 V stand-off voltage (VWM), 14.3–15.8 V breakdown voltage (VBR) at 1 mA, 21.2 V maximum clamping voltage (VC) at 28 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial systems.
For engineers reviewing the SM6T15AHM3/H datasheet, SM6T15AHM3/H pinout, SM6T15AHM3/H application, or SM6T15AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low-inductance SMB package, and verified clamping performance under repetitive surge stress per IEC 61000-4-5.
Technical Context
The SM6T15AHM3/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to deliver precise voltage clamping during fast transients. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ = 150 °C) support reliable operation on standard PCB copper pads without forced cooling.
It is rated for 100 A non-repetitive forward surge current (IFSM, 10 ms half-sine) and exhibits <1.0 μA reverse leakage at VWM, ensuring minimal standby power loss in protected circuits. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage threshold for protected circuitry. |
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on behavior across production lot and temperature. |
| VC @ IPPM | 21.2 V at 28 A (10/1000 μs) - Clamped voltage during worst-case surge; defines maximum stress imposed on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without failure. |
| IFSM | 100 A - Single half-sine surge rating; supports protection of power switches subject to inductive kickback in motor control or relay drivers. |
| TJ max. | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and high-ambient industrial enclosures. |
Pinout & Package
SMB (DO-214AA) surface-mount package with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by band marking; anode and cathode terminals are axially oriented along the body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal for unidirectional clamping | Connected to protected line; conducts during positive transients to shunt energy to ground. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces; supports long-term reliability under thermal cycling and vibration. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JEDEC JESD201 Class 2 whisker resistance; suitable for consumer, industrial, and automotive supply chains. |
| 600 W peak pulse power (10/1000 μs) | Provides margin against EN 61000-4-5 surge test requirements up to 4 kV (line-to-earth) in 2 Ω source impedance configurations. |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time); critical for protecting high-speed digital interfaces and precision analog sensors. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground to limit transient voltage to safe levels before reaching interface IC. Use Value: Prevents latch-up or permanent damage to transceivers rated for ≤24 V absolute maximum, maintaining communication integrity during 12 V system surges. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminals to absorb repetitive 400 V/1 A transients induced by relay coil de-energization. Use Value: Extends mean time between failures (MTBF) of input optocouplers by limiting peak reverse voltage to <22 V, well below their 30 V rating. |
| Consumer Power Adapter ESD Suppression | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters and AC/DC wall adapters subjected to human-body-model (HBM) and IEC 61000-4-2 ESD events. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp on +5 V/9 V/15 V output rails to prevent ESD-induced reset or latch-up in connected devices. Use Value: Clamps 8 kV contact discharge to <25 V within <1 ns, preserving regulation loop stability and avoiding brownout resets in downstream SoCs. |
Use Scenario: Primary protection for Ethernet PHYs and PoE injectors against lightning-induced surges on RJ45 data lines in outdoor access points and base stations. IC Role / Device Role / Timing Role: First-stage TVS on differential pairs (e.g., TX+/TX−) to divert common-mode surge energy before reaching integrated magnetics and PHY IC. Use Value: Limits coupled surge voltage to <30 V peak, staying within the 36 V absolute maximum rating of IEEE 802.3af/at PHY receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same VWM (12.8 V), identical SMB package, but lower PPPM (400 W) and higher VC (24.4 V at 24.4 A). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); not recommended for IEC 61000-4-5 Level 3+ or automotive load dump. | Select SMAJ15A only when cost sensitivity outweighs surge margin requirements and thermal derating is acceptable. |
| 1.5SMC15A | Same electrical specs (VWM, VBR, VC, PPPM), but larger SMC (DO-214AB) package with higher RθJA (70 °C/W) and no AEC-Q101 qualification. | Not suitable for space-constrained automotive PCBs or AEC-Q101–mandated designs; requires larger pad layout and lacks automotive traceability. | Choose 1.5SMC15A only for non-automotive industrial use where board area permits and qualification is not required. |
Compared with SMAJ15A and 1.5SMC15A, SM6T15AHM3/H delivers superior surge robustness in a smaller footprint while meeting automotive qualification - making it optimal for next-generation compact, high-reliability power and signal line protection.
Availability
SM6T15AHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and halogen-free manufacturing.
Supply support for SM6T15AHM3/H 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SM6T Series was engineered specifically for high-energy transient suppression in space-constrained, thermally challenging environments - targeting automotive powertrain, ADAS, and industrial automation systems requiring AEC-Q101 validation and consistent clamping performance.
FAQ
What is the clamping voltage of SM6T15AHM3/H at its rated peak pulse current?
The SM6T15AHM3/H has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 28 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T15AHM3/H maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is SM6T15AHM3/H qualified for automotive applications?
Yes, SM6T15AHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and explicit listing in Vishay's automotive-grade ordering codes. It undergoes stress testing for temperature cycling, mechanical shock, humidity, and surge robustness per AEC-Q101 Rev D. The SM6T15AHM3/H is approved for use in engine control units, body electronics, and ADAS sensor modules where automotive-grade reliability is mandatory.
What does the "HM3" suffix indicate in SM6T15AHM3/H?
The "HM3" suffix in SM6T15AHM3/H denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, and AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive supply chain requirements including material declarations and process traceability. The SM6T15AHM3/H meets UL 94 V-0 flammability standards and is supplied in 7″ tape-and-reel packaging (code H).
How does SM6T15AHM3/H compare to SM6T15A-E3 in terms of reliability?
SM6T15AHM3/H offers higher reliability than SM6T15A-E3 due to its AEC-Q101 qualification, halogen-free molding compound, and enhanced whisker resistance (JESD201 Class 2). While both share identical electrical specs and SMB package, the SM6T15AHM3/H undergoes additional automotive-specific qualification tests including accelerated life testing and bias-HAST. For mission-critical automotive or industrial deployments, SM6T15AHM3/H is the validated choice.
What is the thermal resistance of SM6T15AHM3/H, and how does it affect PCB layout?
The SM6T15AHM3/H 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 minimum recommended pad layout per Vishay's DO-214AA outline drawing. To maintain safe junction temperatures under repeated surges, designers must adhere to these pad dimensions and avoid excessive trace length or isolation - otherwise, thermal derating of PPPM becomes necessary. The SM6T15AHM3/H's thermal performance is fully characterized in Figure 2 of document 88385.
SM6T15AHM3/H 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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 (SMB)
SM6T15AHM3/H FAQ
1.How can I place an order for SM6T15AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15AHM3/H 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 SM6T15AHM3/H reliable?
The price and inventory of SM6T15AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15AHM3/H is usually 5 days.
3.What payment methods are accepted for SM6T15AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15AHM3/H?
SM6T15AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15AHM3/H 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 SM6T15AHM3/H?
For technical support, including SM6T15AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15AHM3/H requirements.
6.How does Aetrix verify that SM6T15AHM3/H is sourced from the original manufacturer or authorized distributors?
All SM6T15AHM3/H 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 SM6T15AHM3/H meets industry standards.
7.What is the process for return or replacement of SM6T15AHM3/H?
All SM6T15AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15AHM3/H, 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 SM6T15AHM3/H part is unused and in its original packaging.
Return procedure for SM6T15AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15AHM3/H Tags
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