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Vishay General Semiconductor - Diodes Division SM6T150AHM3/I
- Part No.:
- SM6T150AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150AHM3/I.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,959
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Product details
Overview
SM6T150AHM3/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, MOSFET gate drivers, and industrial I/O interfaces.
For engineers reviewing the SM6T150AHM3/I datasheet, SM6T150AHM3/I pinout, SM6T150AHM3/I application, or SM6T150AHM3/I equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging glass-passivated junction technology for stable breakdown behavior and low leakage (<1.0 μA at VWM). Its 150 V stand-off voltage enables use in 12 V–48 V automotive and industrial power rails where overvoltage events exceed normal operating range but must not trigger false trips.
The device delivers 207 V clamping at 2.9 A (10/1000 μs), achieving <3.5% voltage overshoot relative to VBR (143–158 V), and exhibits low inductance due to SMB package geometry-critical for suppressing fast-rising transients from inductive load switching or ESD events on signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - Maximum continuous reverse operating voltage before clamping initiates; sets threshold for protection activation in 12–48 V systems. |
| VBR min/max | 143 V / 158 V - Verified breakdown range at 1.0 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 207 V at 2.9 A (10/1000 μs) - Clamped voltage during standardized surge; defines worst-case stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or lower-potential rail. | Defines reference node for clamping action; must be routed with low-inductance path to minimize voltage overshoot. |
| Cathode | Current exit terminal in forward bias; marked by band; connected to protected line. | Identifies protected signal/power line side; polarity must match circuit topology to avoid reverse conduction failure. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity up to 1 kV source impedance without derating. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per AEC standard. |
| Glass passivated chip junction | Ensures stable VBR over lifetime and humidity exposure; eliminates parameter drift in harsh environments. |
| Low inductance SMB package | Reduces parasitic L × di/dt voltage spikes during fast transients (<1 ns rise time), improving clamping fidelity. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor output and microcontroller input, referenced to chassis ground. Use Value: Limits transient voltage to ≤207 V during 10/1000 μs surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. | Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring induced surges (e.g., relay coil flyback, lightning-induced coupling). IC Role / Device Role / Timing Role: Primary front-end surge suppression on 24 V DC input channels prior to optocoupler or Schmitt trigger conditioning. Use Value: Absorbs 600 W transient energy while maintaining <1.0 μA leakage at 128 V, ensuring no false triggering during normal operation. |
| MOSFET Gate Driver Protection | Telecom Power Rail Clamp |
Use Scenario: Safeguarding high-side N-channel MOSFET gate drivers in motor control inverters against shoot-through-inducing voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Clamping diode placed between gate and source, referenced to driver IC ground, activated only during overvoltage events. Use Value: Clamps gate-source voltage to ≤207 V within nanoseconds, preserving MOSFET safe operating area (SOA) during 100 ns–1 μs transients. | Use Scenario: Suppressing voltage overshoot on 48 V telecom power distribution boards caused by hot-swap events or backup battery switchover. IC Role / Device Role / Timing Role: Secondary overvoltage clamp parallel to primary DC-DC converter output, triggered after bulk capacitor charging transients. Use Value: Withstands 100 A IFSM (10 ms half-sine), enabling survival of repeated hot-swap inrush currents without degradation. |
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), same SMB package, but lower PPPM (400 W); RθJA = 125 °C/W. | Lacks AEC-Q101 qualification; suitable for commercial-grade industrial equipment only. | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is not required. |
| 1.5SMC150AHE3_A/H | Higher package thermal mass (SMC/DO-214AB); identical VWM/VBR/VC specs; RθJA = 85 °C/W. | Requires larger PCB footprint; better suited for high-reliability industrial power supplies with sustained surge duty cycles. | Choose when thermal derating below 100 °C ambient is critical and board space permits SMC footprint. |
Compared with SM6T150AHM3/I, SMAJ150A-E3/5B offers reduced surge margin and no automotive qualification, while 1.5SMC150AHE3_A/H improves thermal performance at the cost of board area-making SM6T150AHM3/I optimal for space-constrained AEC-Q101 designs needing precise 600 W capability.
Availability
SM6T150AHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power distribution systems requiring stable component supply with halogen-free, AEC-Q101-qualified surge protection.
Supply support for SM6T150AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure-designed to meet stringent AEC-Q101, IEC 61000-4-5, and UL 94 V-0 requirements while maintaining tight parametric consistency.
FAQ
What is the clamping voltage of SM6T150AHM3/I under a 10/1000 μs surge?
The SM6T150AHM3/I has a maximum clamping voltage (VC) of 207 V when subjected to a 10/1000 μs waveform at 2.9 A peak pulse current (IPPM), as specified in the Vishay datasheet revision 09-Jan-2024. This value defines the upper voltage limit imposed on protected circuits during standardized surge events and is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards.
Is SM6T150AHM3/I qualified for automotive applications?
Yes, SM6T150AHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and explicit listing in Vishay's automotive ordering codes. The HM3 designation indicates halogen-free, RoHS-compliant construction with full AEC-Q101 stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock-making it suitable for under-hood and body-control module deployments.
What does the "HM3" suffix mean in SM6T150AHM3/I?
The "HM3" suffix in SM6T150AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering documentation, HM3 parts meet JESD201 Class 2 whisker resistance, UL 94 V-0 flammability rating, and MSL Level 1 moisture sensitivity-distinguishing them from commercial-grade M3 or E3 variants that lack automotive qualification.
What is the standoff voltage (VWM) rating for SM6T150AHM3/I?
The standoff voltage (VWM) for SM6T150AHM3/I is 128 V, representing the maximum continuous reverse voltage the device can withstand without entering avalanche conduction. This value is derived from the 150 V nominal rating and aligns with Vishay's published electrical characteristics table, ensuring reliable operation in 48 V automotive and industrial power systems with safety margin.
Does SM6T150AHM3/I have bidirectional capability?
No, SM6T150AHM3/I is a unidirectional TVS diode, indicated by the "A" suffix (not "CA") and presence of a cathode band marking. Bidirectional versions require the "CA" suffix (e.g., SM6T150CA), which are functionally distinct devices with symmetrical breakdown in both polarities-SM6T150AHM3/I conducts only in reverse bias and must be oriented with the banded end toward the protected line.
SM6T150AHM3/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:
- Discontinued at Digi-Key
- 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:
- -
- 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/I FAQ
1.How can I place an order for SM6T150AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150AHM3/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/I reliable?
The price and inventory of SM6T150AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SM6T150AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150AHM3/I?
SM6T150AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150AHM3/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/I?
For technical support, including SM6T150AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150AHM3/I requirements.
6.How does Aetrix verify that SM6T150AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T150AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SM6T150AHM3/I?
All SM6T150AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150AHM3/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/I part is unused and in its original packaging.
Return procedure for SM6T150AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150AHM3/I Tags
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