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Vishay General Semiconductor - Diodes Division SM6T150CAHM3/I
- Part No.:
- SM6T150CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150CAHM3/I.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,248
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Product details
Overview
SM6T150CAHM3/I from Vishay General Semiconductor is a bidirectional 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, power rails, and I/O interfaces operating up to +150 °C junction temperature.
For engineers reviewing the SM6T150CAHM3/I datasheet, SM6T150CAHM3/I pinout, SM6T150CAHM3/I application, or SM6T150CAHM3/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.38), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding its breakdown voltage (VBR = 143–158 V), it avalanches to divert surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping in both polarities, eliminating polarity concerns in AC-coupled or floating signal paths.
Designed for high-reliability automotive environments, SM6T150CAHM3/I features glass-passivated junctions, meets MSL Level 1 (260 °C reflow), and delivers stable performance across -65 °C to +150 °C operating range - critical for under-hood and ADAS sensor modules where thermal cycling and long-term stability are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC signal rail margin |
| VBR min/max | 143 V / 158 V at 1 mA - precise avalanche onset threshold enabling predictable overvoltage response |
| VC @ IPPM | 207 V at 2.9 A (10/1000 μs) - clamping voltage limiting downstream component stress during surge events |
| PPPM | 600 W - peak transient energy handling capacity per IEC 61000-4-5 Level 4 compliance testing |
| TJ max | +150 °C - enables deployment in high-temperature automotive zones without derating penalties |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, and ESD testing per AEC specification |
Pinout & Package
SM6T150CAHM3/I uses an SMB (DO-214AA) surface-mount package with two terminals: no polarity marking due to bidirectional construction. The device is symmetric - either terminal may serve as anode or cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Acts as cathode when positive transient appears; functions as anode during negative transients - no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Complementary terminal completing symmetrical clamping path; identical electrical role to Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating nodes without polarity constraints |
| 600 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly designed PCB layouts |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensors |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow soldering (260 °C peak) |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected ICs |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at connector entry point to clamp transients before reaching sensor signal conditioning circuitry. Use Value: Prevents sensor output saturation or permanent damage during 12 V system load dump events (up to 60 V, 400 ms) and ISO 16750-2 surges. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD (IEC 61000-4-2 ±8 kV contact) and burst noise in factory automation controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CAN bus lines near transceiver to absorb common-mode and differential transients. Use Value: Maintains CAN communication integrity by limiting bus voltage excursion to ≤207 V during 4 kV EFT bursts, avoiding transceiver shutdown or bit errors. |
| Power Supply Input Protection | Consumer USB Port Surge Suppression |
Use Scenario: Guarding 12–24 V DC input rails of infotainment head units and telematics gateways against battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Bidirectional TVS connected between VIN and GND to clamp both positive and negative overvoltage excursions. Use Value: Withstands 100 A IFSM surge (10 ms half-sine), enabling survival of jump-start transients while maintaining <1 μA leakage at 128 V standby. | Use Scenario: Adding secondary surge protection to USB 2.0 data lines (D+/D−) in portable medical devices subjected to hospital-grade ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with data traces to suppress ESD without degrading signal integrity. Use Value: Clamps ±15 kV air discharge to <207 V within <1 ns, preserving USB full-speed timing margins and preventing PHY latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150CA | Same VWM (128 V), lower PPPM (400 W), SMA package (larger RθJA = 150 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W capability is required | Choose SMAJ150CA only if board space allows larger SMA footprint and thermal budget permits higher junction rise |
| 1.5KE150CA | Through-hole TO-218 package, same VWM/VC, higher IFSM (200 A), but incompatible with SMT assembly | Not viable for automated production; requires wave soldering or hand assembly; unsuitable for compact automotive modules | Select 1.5KE150CA only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMAJ150CA and 1.5KE150CA, SM6T150CAHM3/I uniquely combines 600 W surge rating, AEC-Q101 qualification, halogen-free construction, and SMB footprint - making it the optimal choice for high-volume, thermally constrained, automotive-grade SMT designs requiring guaranteed reliability and regulatory compliance.
Availability
SM6T150CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface hardening, and power supply input surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SM6T150CAHM3/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, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-energy transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, precise clamping, and SMT manufacturability are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T150CAHM3/I?
The "CA" suffix in SM6T150CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., SM6T150AHM3/I), SM6T150CAHM3/I has no cathode marking and functions identically regardless of voltage polarity applied across its terminals, simplifying layout for AC-coupled or floating signal paths.
Is SM6T150CAHM3/I qualified for automotive use?
Yes, SM6T150CAHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's official SM6T datasheet (Doc. #88385, Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD robustness - validating its suitability for under-hood, body control, and ADAS applications where reliability under thermal and electrical stress is critical.
What is the clamping voltage of SM6T150CAHM3/I at rated surge current?
The clamping voltage (VC) of SM6T150CAHM3/I is 207 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 2.9 A, per Vishay's SM6T datasheet Table on page 2. This value represents the maximum voltage seen across the device during standardized surge testing and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the SMB package of SM6T150CAHM3/I compare to SMA in size and thermal performance?
SM6T150CAHM3/I uses the SMB (DO-214AA) package - measuring 4.06 mm × 5.59 mm - which is smaller than the SMA (DO-214AC) package. Its typical junction-to-ambient thermal resistance (RθJA) is 100 °C/W (on 5.0 mm × 5.0 mm copper pads), versus ~150 °C/W for SMA equivalents. This lower RθJA enables better power dissipation in space-constrained automotive PCBs without additional heatsinking.
Does SM6T150CAHM3/I meet RoHS and halogen-free requirements?
Yes, SM6T150CAHM3/I meets RoHS Directive 2011/65/EU and is halogen-free, as explicitly stated in the Vishay SM6T datasheet: "Base P/N-M3 - halogen-free, RoHS-compliant, commercial grade" and "Base P/NHM3_X - halogen-free, RoHS-compliant, and AEC-Q101 qualified". The "HM3" suffix confirms both environmental compliance and automotive qualification.
SM6T150CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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)
SM6T150CAHM3/I FAQ
1.How can I place an order for SM6T150CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150CAHM3/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 SM6T150CAHM3/I reliable?
The price and inventory of SM6T150CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T150CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM6T150CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150CAHM3/I?
SM6T150CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150CAHM3/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 SM6T150CAHM3/I?
For technical support, including SM6T150CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150CAHM3/I requirements.
6.How does Aetrix verify that SM6T150CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T150CAHM3/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 SM6T150CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM6T150CAHM3/I?
All SM6T150CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150CAHM3/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 SM6T150CAHM3/I part is unused and in its original packaging.
Return procedure for SM6T150CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150CAHM3/I Tags
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