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Vishay General Semiconductor - Diodes Division SM6T15AHM3_B/H
- Part No.:
- SM6T15AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15AHM3_B/H.pdf
- Description:
- 600W,15V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,363
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Product details
Overview
SM6T15AHM3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 15 V breakdown voltage (VBR = 14.3–15.8 V at 1.0 mA), 21.2 V maximum clamping voltage (VC) at 28.0 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines, MOSFET gate drivers, and industrial I/O interfaces.
For engineers reviewing the SM6T15AHM3_B/H datasheet, SM6T15AHM3_B/H pinout, SM6T15AHM3_B/H application, or SM6T15AHM3_B/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, unidirectional polarity with cathode band marking, and thermal resistance (RθJA = 100 °C/W) on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at 12.8 V stand-off), while the low-inductance SMB package supports fast response to sub-microsecond transients.
Designed for unidirectional operation only, SM6T15AHM3_B/H features a defined cathode terminal (marked band), complies with JESD201 Class 2 whisker resistance, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - defines precise avalanche initiation threshold for repeatable clamping onset |
| VWM | 12.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 21.2 V at 28.0 A (10/1000 μs) - limits protected circuit voltage during worst-case surge |
| PPPM | 600 W - peak transient power handling capability under standardized 10/1000 μs waveform |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on 5.0 mm × 5.0 mm copper pads, critical for power derating above 25 °C |
| TJ max. | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-impedance return in unidirectional clamp configuration |
| Cathode (banded end) | Avalanche breakdown node / Clamping reference | Connected to protected line (e.g., sensor output, MOSFET gate); voltage clamped relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables reliable suppression of ISO 7637-2 Pulse 1/2a/5a surges without failure in automotive ECUs |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per stress test plan |
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over 15-year service life in industrial environments |
| Low inductance SMB package | Minimizes voltage overshoot during <100 ns rise-time transients, critical for high-speed data line protection |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and microcontroller ADC input, referenced to chassis ground. Use Value: Limits transient voltage to ≤21.2 V during 28 A surges, preserving ADC integrity and preventing latch-up in downstream signal conditioning ICs. | Use Scenario: Safeguarding RS-485 transceiver pins in programmable logic controller (PLC) backplanes subject to field wiring faults and lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-connected TVS on differential bus lines (A/B), with cathodes tied to local ground plane. Use Value: Clamps common-mode surges up to 600 W without degrading signal integrity at 10 Mbps, meeting IEC 61000-4-5 Level 3 requirements. |
| MOSFET Gate Driver Protection | Consumer Power Supply Input Stage |
Use Scenario: Shielding high-side N-channel MOSFET gates in DC-DC converters from Miller-induced voltage spikes during fast switching transitions. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed between gate and source, with cathode at gate node. Use Value: Responds within <1 ns to clamp gate-source voltage to 21.2 V, preventing oxide breakdown while adding <0.5 pF parasitic capacitance. | Use Scenario: Secondary-side transient suppression on 12 V DC output rails of wall-adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Standoff-mounted TVS across output terminals, cathode to +VOUT, anode to GND. Use Value: Absorbs repetitive 100 A/10 ms surges from capacitive load hot-plug events without degradation, maintaining UL 62368-1 compliance. |
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 VBR range (14.3–15.8 V), but lower PPPM = 400 W; SMA package (larger RθJA = 125 °C/W) | Not AEC-Q101 qualified; limited to commercial-grade industrial use | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin |
| 1.5SMC15A | Identical electrical specs, but SMC (DO-214AB) package - 2.5× higher thermal mass and RθJL = 12 °C/W vs. 20 °C/W | Better sustained power handling, but incompatible footprint; requires PCB redesign | Choose for high-reliability power supply inputs where board space allows larger package and layout change is acceptable |
Compared with SMAJ15A and 1.5SMC15A, SM6T15AHM3_B/H delivers AEC-Q101 assurance in the smallest qualified SMB footprint, balancing surge margin, thermal performance, and automotive compliance without layout compromise.
Availability
SM6T15AHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer power adapter secondary-side protection requiring stable component supply and full traceability.
Supply support for SM6T15AHM3_B/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 diodes, rectifiers, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, low clamping voltage, and consistent surge endurance are mandatory.
FAQ
What does the "HM3" suffix indicate in SM6T15AHM3_B/H?
The "HM3" suffix in SM6T15AHM3_B/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification for automotive applications. It confirms compliance with JESD201 Class 2 whisker resistance, MSL Level 1 moisture sensitivity, and 260 °C peak reflow profile - all verified per Vishay's qualification report for the SM6T15AHM3_B/H device.
Is SM6T15AHM3_B/H bidirectional or unidirectional?
SM6T15AHM3_B/H is unidirectional. Its cathode is marked by a visible band on the SMB package body, and its electrical characteristics - including VBR, VWM, and VC - apply only in reverse bias. Bidirectional variants use the "CA" suffix (e.g., SM6T15CA), which SM6T15AHM3_B/H does not carry.
What is the maximum clamping voltage of SM6T15AHM3_B/H under standard test conditions?
The maximum clamping voltage of SM6T15AHM3_B/H is 21.2 V, measured at 28.0 A peak pulse current using the 10/1000 μs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (−65 °C to +150 °C) and defines the upper voltage limit imposed on protected circuits during surge events.
Can SM6T15AHM3_B/H be used in place of SM6T15A-E3/52?
SM6T15AHM3_B/H is not a direct replacement for SM6T15A-E3/52 due to differences in qualification and material content: SM6T15AHM3_B/H is halogen-free and AEC-Q101 qualified, whereas SM6T15A-E3/52 is RoHS-compliant commercial grade only. Both share identical electrical specs and SMB package, but automotive designs require HM3's qualification evidence.
What is the thermal resistance of SM6T15AHM3_B/H, and how does it affect layout design?
SM6T15AHM3_B/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. Layout must replicate this pad area to achieve rated power derating; reducing pad size increases RθJA, lowering safe surge repetition rate and risking thermal runaway during repeated transients.
SM6T15AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Telecom
- 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_B/H FAQ
1.How can I place an order for SM6T15AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15AHM3_B/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_B/H reliable?
The price and inventory of SM6T15AHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SM6T15AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15AHM3_B/H?
SM6T15AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15AHM3_B/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_B/H?
For technical support, including SM6T15AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15AHM3_B/H requirements.
6.How does Aetrix verify that SM6T15AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T15AHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SM6T15AHM3_B/H?
All SM6T15AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15AHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SM6T15AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15AHM3_B/H Tags
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