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Vishay General Semiconductor - Diodes Division SM6T12AHM3_B/I
- Part No.:
- SM6T12AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12AHM3_B/I.pdf
- Description:
- 600W,12V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,176
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Product details
Overview
SM6T12AHM3_B/I 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 12 V breakdown voltage (VBR = 11.4–12.6 V), 16.7 V maximum clamping voltage at 36 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T12AHM3_B/I datasheet, SM6T12AHM3_B/I pinout, SM6T12AHM3_B/I application, or SM6T12AHM3_B/I equivalent, key selection criteria include unidirectional polarity, 10.2 V stand-off voltage, low clamping ratio (1.39), halogen-free RoHS compliance, and suitability for IFSM-sensitive circuits requiring 100 A surge tolerance.
Technical Context
This TVS diode operates as a fast-acting shunt protection device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR and low leakage (<5.0 μA at 10.2 V), while the SMB package delivers low inductance and meets MSL level 1 with 260 °C reflow capability.
Designed for single-polarity transient suppression, it clamps within nanoseconds during 10/1000 μs surges, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W - enabling reliable operation up to TJ = 150 °C in compact PCB layouts with minimal copper pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V - defines precise avalanche onset range under 1.0 mA test current |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5.0 μA |
| VC @ IPPM | 16.7 V @ 36.0 A - clamping voltage during 600 W transient, limiting downstream stress |
| PPPM | 600 W - peak pulse power handling per 10/1000 μs waveform, critical for load-switching events |
| IFSM | 100 A - non-repetitive forward surge rating (10 ms half-sine), supports inrush immunity |
| TJ max | +150 °C - maximum junction temperature, enabling under-hood automotive deployment |
| AEC-Q101 | Qualified - validated for automotive electronics per stress-test requirements (HTOL, TC, AC, etc.) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane during clamping |
| Cathode | Avalanche breakdown node / protected line connection | Connected to line being protected (e.g., 12 V rail, sensor output) |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to downstream ICs like MCUs and CAN transceivers |
| Glass passivated junction | Ensures long-term stability of VBR and leakage across temperature and life cycles |
| MSL Level 1, 260 °C peak | Supports standard SMT reflow without preconditioning or special handling |
| AEC-Q101 qualified (HM3 suffix) | Validates reliability for automotive control units, body electronics, and ADAS sensor interfaces |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp spikes above 16.7 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs during ISO 16750-2 tests. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules exposed to field wiring noise. IC Role / Device Role / Timing Role: Low-leakage (≤5 μA) TVS on 4–20 mA loop or 0–10 V signal line, referenced to local ground. Use Value: Maintains signal integrity below 10.2 V stand-off while suppressing EFT bursts per IEC 61000-4-4. |
| Consumer Power Adapter Input Protection | Telecom DC Power Feed Protection |
Use Scenario: Secondary-side overvoltage suppression in wall adapters supplying USB-C PD or PoE-powered devices. IC Role / Device Role / Timing Role: Fast-response TVS on +5 V/+9 V/+12 V output rails to absorb capacitor discharge transients. Use Value: Limits voltage overshoot to ≤16.7 V during hot-plug events, protecting connected SoCs and PMICs. | Use Scenario: DC feed line protection in remote radio units powered via -48 V telecom supply with lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail (cathode to -48 V, anode to ground) for bidirectional surge conduction. Use Value: Clamps negative-going transients to ≤16.7 V magnitude, preserving integrity of baseband processors and RF front-ends. |
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-E3/5B | Same SMB package, 12 V VBR, but lower PPPM = 400 W and no AEC-Q101 qualification | Not rated for automotive under-hood use; suitable for commercial-grade consumer/industrial boards | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin |
| 1.5SMC12A | Higher-power SMC package (PPPM = 1500 W), same VBR range, but larger footprint and higher VC = 19.9 V | Used where higher energy absorption is needed (e.g., motor drive inputs), not space-constrained designs | Choose when system-level surge testing exceeds 600 W or layout allows larger SMC footprint |
Compared with SMAJ12A-E3/5B and 1.5SMC12A, SM6T12AHM3_B/I uniquely balances AEC-Q101 compliance, 600 W capability, and SMB size - making it optimal for automotive body controllers and compact industrial sensors where qualification and board area are both critical.
Availability
SM6T12AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SM6T12AHM3_B/I 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 protection devices with emphasis on reliability and automotive-grade performance.
The SM6T Series is engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping behavior, low leakage, and validated AEC-Q101 robustness in compact SMB packages.
FAQ
What is the exact breakdown voltage range for SM6T12AHM3_B/I?
The SM6T12AHM3_B/I has a guaranteed breakdown voltage (VBR) range of 11.4 V to 12.6 V at 1.0 mA test current, measured per JEDEC standards. This tight tolerance ensures predictable clamping onset across production lots and temperature ranges, directly supporting design margin calculations for protected ICs in the SM6T12AHM3_B/I application circuit.
Is SM6T12AHM3_B/I suitable for automotive under-hood applications?
Yes, SM6T12AHM3_B/I is AEC-Q101 qualified (denoted by HM3 suffix) and rated for TJ = -65 °C to +150 °C. Its glass-passivated junction, MSL Level 1 reflow compatibility, and validated HTOL/TC performance make it appropriate for engine control units, lighting modules, and other under-hood systems where SM6T12AHM3_B/I must withstand thermal cycling and humidity exposure.
What does the "_B/I" suffix mean in SM6T12AHM3_B/I?
The "_B/I" suffix in SM6T12AHM3_B/I indicates packaging configuration: "B" denotes revision code B per Vishay's internal documentation, and "I" specifies 13-inch diameter tape-and-reel delivery with 3200 units per reel. This matches the ordering format defined in Vishay Document 88385 and confirms full traceability and standard SMT handling for SM6T12AHM3_B/I.
How does SM6T12AHM3_B/I compare to bidirectional TVS diodes like SM6T12CA?
SM6T12AHM3_B/I is unidirectional and intended for DC line protection with defined polarity (cathode to protected line); SM6T12CA is bidirectional and used for AC or differential signal lines. The SM6T12AHM3_B/I offers lower leakage at VWM and avoids ambiguity in grounding - critical where reverse conduction must be blocked, unlike SM6T12CA which conducts in both directions.
What is the maximum clamping voltage of SM6T12AHM3_B/I under standard test conditions?
The SM6T12AHM3_B/I exhibits a maximum clamping voltage (VC) of 16.7 V at 36.0 A peak pulse current (10/1000 μs waveform), as specified in Vishay Document 88385. This value is measured with 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events - a key parameter for validating safe operation of downstream components in any SM6T12AHM3_B/I implementation.
SM6T12AHM3_B/I 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:
- 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):
- 36A
- 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)
SM6T12AHM3_B/I FAQ
1.How can I place an order for SM6T12AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12AHM3_B/I 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 SM6T12AHM3_B/I reliable?
The price and inventory of SM6T12AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T12AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T12AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12AHM3_B/I?
SM6T12AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12AHM3_B/I 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 SM6T12AHM3_B/I?
For technical support, including SM6T12AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12AHM3_B/I requirements.
6.How does Aetrix verify that SM6T12AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T12AHM3_B/I 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 SM6T12AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T12AHM3_B/I?
All SM6T12AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12AHM3_B/I, 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 SM6T12AHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T12AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T12AHM3_B/I Tags
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