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Vishay General Semiconductor - Diodes Division SM6T150AHM3_B/I
- Part No.:
- SM6T150AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150AHM3_B/I.pdf
- Description:
- 600W,150V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,407
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Product details
Overview
SM6T150AHM3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 150 V standoff voltage (VWM), 207 V clamping voltage (VC) at 2.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs). It provides robust ESD and surge protection for automotive sensor signal lines and MOSFET gate drivers.
For engineers reviewing the SM6T150AHM3_B/I datasheet, SM6T150AHM3_B/I pinout, SM6T150AHM3_B/I application, or SM6T150AHM3_B/I equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, junction temperature derating above 25 °C, unidirectional polarity alignment with circuit ground reference, and AEC-Q101 qualification for automotive under-hood use.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its breakdown threshold (143–158 V), it avalanches to divert transient energy away from downstream components. Its low-inductance SMB package and glass-passivated junction enable fast response (<1 ns) to ESD and lightning-induced surges.
Designed for unidirectional operation, SM6T150AHM3_B/I features a cathode band marking, requires correct PCB polarity placement, and delivers stable clamping performance across -65 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system nominal rail by ≥20 % to avoid leakage-induced power loss. |
| VBR min/max | 143 V / 158 V - Breakdown occurs within this range at 1 mA test current; defines minimum overvoltage threshold for reliable triggering. |
| VC @ IPPM | 207 V - Clamped voltage at 2.9 A (10/1000 μs); determines maximum stress imposed on protected IC during worst-case surge. |
| PPPM | 600 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 3 (1 kV/42 Ω) surge testing. |
| TJ max | +150 °C - Maximum junction temperature; enables placement near heat-generating components in automotive engine control units. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability per stress-test requirements including HTOL, TCT, and ESD HBM ≥2 kV. |
Pinout & Package
SMB (DO-214AA) surface-mount package: 2-terminal, gull-wing leads, 0.220" × 0.130" body size, matte tin-plated terminals solderable per J-STD-002, MSL level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference node | Connected to system ground or lowest-potential rail; establishes polarity-dependent clamping behavior. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity up to 1 kV open-circuit voltage in industrial and automotive environments. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive under-hood applications including engine management, transmission control, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS-001 ESD standards for green manufacturing and end-of-life processing. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, triggered only during positive-going overvoltage events. Use Value: Limits transient voltage to ≤207 V, well below 24 V-rated transceiver absolute maximum ratings, preventing data corruption and permanent failure. | Use Scenario: Safeguarding high-side and low-side MOSFET gate drivers in variable-frequency drives against Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Clamping gate-source voltage to prevent unintended turn-on or oxide breakdown during dv/dt-induced coupling. Use Value: With 2.9 A peak pulse current capacity and 20 ns response time, SM6T150AHM3_B/I suppresses sub-microsecond spikes without affecting PWM timing integrity. |
| Telecom Line Interface Protection | Power Supply Input Surge Suppression |
Use Scenario: Shielding Ethernet PHY front-end circuits and PoE injectors from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair inputs, coordinated with secondary GDT or polymer PTC devices. Use Value: 128 V standoff ensures compatibility with 48 V DC PoE systems while clamping 10/1000 μs surges to 207 V, preserving PHY receiver sensitivity. | Use Scenario: Front-end protection for 110/220 VAC-to-DC SMPS inputs subjected to differential-mode surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-stage clamping device after MOV-based primary suppression, handling residual fast-rising transients. Use Value: 600 W rating and 100 °C/W thermal resistance allow sustained operation at 50 °C ambient with minimal derating, extending service life in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A-E3/5B | Same VWM (128 V), lower PPPM (400 W), higher VC (243 V), SMA package (larger footprint, higher RθJA) | Limited to lower-energy surges; less suitable for AEC-Q101 automotive designs due to commercial-grade qualification | Select if cost-sensitive and surge threat level is ≤IEC 61000-4-5 Level 2; verify layout clearance for larger SMA body. |
| 1.5SMC150AHE3_A/H | Same VWM and VC, 1500 W PPPM, SMC package (higher thermal mass), AEC-Q101 qualified | Better suited for high-reliability 24 V systems with repetitive surge exposure; requires larger PCB area and different pad layout | Choose when peak surge energy exceeds 600 W capability or extended thermal cycling is expected; confirm SMC mounting compatibility. |
Compared with SMAJ150A-E3/5B, SM6T150AHM3_B/I offers 50 % higher surge power handling and automotive qualification; versus 1.5SMC150AHE3_A/H, it trades 2.5× peak power for 30 % smaller footprint and identical AEC-Q101 compliance-ideal for space-constrained engine control modules.
Availability
SM6T150AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive gate protection, and telecom line interface protection requiring stable component supply and long-term lifecycle support.
Supply support for SM6T150AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is designed specifically for surface-mount transient suppression in automotive, industrial, and communications equipment where compact size, high surge capability, and AEC-Q101 qualification are mandatory.
FAQ
What is the clamping voltage of SM6T150AHM3_B/I at its rated peak pulse current?
The SM6T150AHM3_B/I has a maximum clamping voltage (VC) of 207 V when subjected to its specified peak pulse current of 2.9 A using a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and represents the upper limit of voltage seen by protected circuitry during a standardized surge event. The SM6T150AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is SM6T150AHM3_B/I suitable for automotive applications?
Yes, SM6T150AHM3_B/I is AEC-Q101 qualified, as indicated by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It meets stress-test requirements including high-temperature operating life, temperature cycling, and ESD robustness required for under-hood and cabin electronics. The SM6T150AHM3_B/I is explicitly recommended for automotive sensor units and control modules in Vishay's official documentation.
What does the "_B/I" suffix mean in SM6T150AHM3_B/I?
The "_B/I" suffix in SM6T150AHM3_B/I specifies packaging and reel configuration: "B" denotes revision code B per Vishay's internal change control, and "I" indicates 13-inch diameter plastic tape and reel with 3200 units per reel. This matches the ordering information table in datasheet 88385, confirming SM6T150AHM3_B/I is supplied in high-volume automated assembly format compatible with standard SMT feeders.
How does SM6T150AHM3_B/I differ from bidirectional variants like SM6T150CA?
SM6T150AHM3_B/I is unidirectional with cathode band marking and conducts only during positive transients relative to ground, whereas SM6T150CA is bidirectional and protects both polarities. The SM6T150AHM3_B/I has asymmetric IV characteristics-low leakage in forward bias and avalanche clamping in reverse-making it ideal for DC-biased signal lines. Bidirectional versions lack polarity marking and exhibit symmetrical clamping in either direction.
What is the thermal resistance of SM6T150AHM3_B/I, and how does it affect layout design?
The SM6T150AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal, as specified in the Thermal Characteristics table. This means each watt of dissipated surge energy raises junction temperature by 100 °C above ambient. To maintain safe operation below +150 °C TJ, designers must ensure adequate copper area and avoid excessive board-level heating near the SM6T150AHM3_B/I location.
SM6T150AHM3_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):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 2.9A
- 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)
SM6T150AHM3_B/I FAQ
1.How can I place an order for SM6T150AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150AHM3_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 SM6T150AHM3_B/I reliable?
The price and inventory of SM6T150AHM3_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 SM6T150AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T150AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150AHM3_B/I?
SM6T150AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150AHM3_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 SM6T150AHM3_B/I?
For technical support, including SM6T150AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150AHM3_B/I requirements.
6.How does Aetrix verify that SM6T150AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T150AHM3_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 SM6T150AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T150AHM3_B/I?
All SM6T150AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150AHM3_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 SM6T150AHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T150AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150AHM3_B/I Tags
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