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Vishay General Semiconductor - Diodes Division SM6T150CAHM3_A/I
- Part No.:
- SM6T150CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150CAHM3_A/I.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,451
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Product details
Overview
SM6T150CAHM3_A/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, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the SM6T150CAHM3_A/I datasheet, SM6T150CAHM3_A/I pinout, SM6T150CAHM3_A/I application, or SM6T150CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, halogen-free RoHS compliance, and verified 150 °C junction temperature rating under transient stress.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable VBR (143–158 V) and low leakage (<1 μA at VWM), while the SMB package delivers low parasitic inductance critical for fast transient response.
Designed for automotive-grade reliability, SM6T150CAHM3_A/I meets AEC-Q101 stress testing requirements and supports operation across –65 °C to +150 °C junction temperature range. Thermal resistance is characterized at RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W, enabling predictable derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 143 V / 158 V - Breakdown occurs within this band at 1 mA test current, ensuring tight tolerance for precise overvoltage thresholding |
| VC @ IPPM | 207 V - Clamping voltage measured at 2.9 A (10/1000 μs waveform), limiting downstream voltage stress during surge events |
| PPPM | 600 W - Peak pulse power handling capability defines maximum transient energy absorption without failure |
| TJ max | +150 °C - Maximum junction temperature rating enables use in under-hood automotive environments and high-power industrial enclosures |
| Package | SMB (DO-214AA) - Standard surface-mount outline with 2.20 mm height and 3.94 mm length, compatible with automated pick-and-place |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces |
Pinout & Package
SM6T150CAHM3_A/I uses an SMB (DO-214AA) surface-mount package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking on the case and functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during positive transients | Connects to protected line; conducts when voltage exceeds +VBR relative to cathode |
| Cathode | Current entry point during negative transients | Connects to protected line; conducts when voltage falls below –VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source impedance) on 24 V industrial buses |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements for green manufacturing and end-of-life recycling |
| MSL Level 1 | Supports reflow soldering up to 260 °C peak without moisture-induced popcorning |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during fast transients, reducing risk of latch-up in downstream CMOS ICs |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs 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: Shunt-type transient suppressor placed directly at connector entry point to clamp induced spikes before reaching sensitive analog front-ends. Use Value: Maintains signal integrity under 12 V/24 V system surges up to 100 Vpk, leveraging 128 V VWM margin and 207 V VC to prevent damage to 3.3 V or 5 V microcontrollers. | Use Scenario: Safeguarding differential CAN_H/CAN_L lines against ESD (IEC 61000-4-2 ±8 kV contact) and fast transient bursts in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) providing symmetrical clamping to preserve common-mode rejection and differential signaling integrity. Use Value: Delivers <1 μA leakage at 128 V, avoiding DC bias shift on bias-dependent CAN receivers, while clamping 8/20 μs transients to ≤265 V. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Shielding Ethernet PHY magnetics, RS-485 transceivers, and PoE injectors from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level surge arrestor mounted at board edge, coordinated with secondary GDT or polymer PTC for staged protection. Use Value: Achieves 600 W dissipation with 2.9 A IPPM (10/1000 μs), enabling coordination with upstream 5 kA MOVs in telecom base station power supplies. | Use Scenario: Guarding 24 V DC input rails of PLC modules and motor drives against inductive switching transients from solenoids and relays. IC Role / Device Role / Timing Role: Parallel-connected clamping device across bulk capacitor input, diverting >100 ns spikes before they propagate into DC-DC converters. Use Value: Withstands 100 A non-repetitive forward surge (IFSM), surviving repeated relay coil de-energization events without degradation. |
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 (higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W is required | Select SM6T150CAHM3_A/I when 600 W rating and AEC-Q101 qualification are mandatory |
| 1.5SMC150CA | Same VWM and PPPM, but larger SMC package (DO-214AB); higher IFSM (200 A) | Requires more PCB area; better for high-repetition surge environments but not space-constrained automotive modules | Choose SM6T150CAHM3_A/I for SMB footprint constraints and halogen-free compliance in modern automotive designs |
Compared with SMAJ150CA and 1.5SMC150CA, SM6T150CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, SMB footprint, and 600 W rating-making it optimal for space-limited, high-reliability automotive and industrial control applications where thermal performance and regulatory compliance are jointly critical.
Availability
SM6T150CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SM6T150CAHM3_A/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 designed specifically for high-energy transient suppression in automotive, industrial, and telecom systems where bidirectional clamping, AEC-Q101 compliance, and compact SMB packaging are essential design requirements.
FAQ
What is the clamping voltage of SM6T150CAHM3_A/I at its rated peak pulse current?
The clamping voltage (VC) of SM6T150CAHM3_A/I is 207 V when subjected to a 10/1000 μs waveform at 2.9 A peak pulse current (IPPM). This value is measured per Figure 1 in the Vishay datasheet 88385 and reflects the maximum voltage seen across the device during standardized surge testing. The 207 V VC ensures downstream components experience limited overvoltage stress, making SM6T150CAHM3_A/I suitable for protecting 24 V and 48 V systems against ISO 7637-2 and IEC 61000-4-5 transients.
Is SM6T150CAHM3_A/I qualified for automotive applications?
Yes, SM6T150CAHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024, Doc. #88385). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for under-hood and cabin-mounted automotive electronics. The "HM3" designation explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction-critical for Tier 1 suppliers and OEMs requiring certified components.
What does the "CA" suffix indicate in SM6T150CAHM3_A/I?
The "CA" suffix in SM6T150CAHM3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T150AHM3_A/I), SM6T150CAHM3_A/I has no polarity marking and clamps equally at ±143–158 V breakdown. This makes SM6T150CAHM3_A/I ideal for AC-coupled lines, differential buses like CAN or RS-485, and floating sensor interfaces where voltage polarity reversal is possible.
What is the maximum junction temperature rating for SM6T150CAHM3_A/I?
The maximum junction temperature (TJ max) for SM6T150CAHM3_A/I is +150 °C, as specified in the "Maximum Ratings" table of Vishay's SM6T datasheet (Doc. #88385). This rating applies under steady-state and transient conditions and supports operation in demanding environments such as engine control units, industrial motor drives, and outdoor telecom equipment. Derating curves in Figure 2 confirm usable power dissipation down to zero at 150 °C ambient when mounted per recommended pad layout.
How does the SMB package of SM6T150CAHM3_A/I compare to SMA or SMC alternatives?
The SMB (DO-214AA) package of SM6T150CAHM3_A/I measures 3.94 mm × 2.20 mm × 1.52 mm, offering a 30 % smaller footprint than SMA (DO-214AC) and 50 % smaller than SMC (DO-214AB). Its RθJA of 100 °C/W (on 5.0 mm × 5.0 mm pads) balances thermal performance and board space efficiency-superior to SMAJ150CA (140 °C/W) but slightly higher than 1.5SMC150CA (70 °C/W). This makes SM6T150CAHM3_A/I optimal where PCB real estate is constrained yet 600 W surge capability is required.
SM6T150CAHM3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for SM6T150CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150CAHM3_A/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_A/I reliable?
The price and inventory of SM6T150CAHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SM6T150CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150CAHM3_A/I?
SM6T150CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150CAHM3_A/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_A/I?
For technical support, including SM6T150CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150CAHM3_A/I requirements.
6.How does Aetrix verify that SM6T150CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T150CAHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SM6T150CAHM3_A/I?
All SM6T150CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150CAHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SM6T150CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150CAHM3_A/I Tags
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