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Vishay General Semiconductor - Diodes Division SM6T150CA-M3/5B
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- Part No.:
- SM6T150CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150CA-M3/5B.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,166
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Product details
Overview
SM6T150CA-M3/5B 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 protects signal lines and power rails in automotive sensor units, industrial I/O interfaces, and telecom surge-prone circuits.
For engineers reviewing the SM6T150CA-M3/5B datasheet, SM6T150CA-M3/5B pinout, SM6T150CA-M3/5B application, or SM6T150CA-M3/5B equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM ≈ 1.38), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector with symmetrical breakdown in both polarities due to its bidirectional CA construction. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and robust surge handling up to 100 A IFSM (unidirectional reference only; not applicable to CA types).
Thermal design relies on RθJA = 100 °C/W and RθJL = 20 °C/W, requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for full 600 W rating. It meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 143 V / 158 V - guaranteed breakdown range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 207 V at 2.9 A (10/1000 μs) - clamping voltage limiting transient energy delivered to protected circuit |
| PPPM | 600 W - peak surge power dissipation capability under standardized lightning-surge waveform |
| ID @ VWM | <1 μA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm height, optimized for automated placement and board space efficiency |
Pinout & Package
SM6T150CA-M3/5B uses an SMB (DO-214AA) package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking; both terminals are functionally symmetric and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive half-cycle) | Conducts during positive transients; forms symmetrical clamp path with cathode |
| Cathode | Transient current entry point (negative half-cycle) | Conducts during negative transients; completes bidirectional clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements for green manufacturing and end-of-life processing |
| Low clamping ratio (VC/VWM = 1.38) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing production overhead |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes 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 divert surge energy before reaching MCU or signal conditioner. Use Value: Clamps 150 V transients to ≤207 V within nanoseconds, preserving signal integrity and preventing latch-up in 3.3 V/5 V sensor front-ends. | Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to motor-switching noise and ground-bounce events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across A/B lines of RS-485 transceivers to suppress common-mode surges without disrupting DC bias. Use Value: Symmetrical clamping ensures equal protection for both polarities of differential signals, maintaining receiver common-mode range and bit-error rate stability. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection of DSL or POTS line interface cards against lightning-induced surges entering via telephone wiring. IC Role / Device Role / Timing Role: Primary-level TVS placed before isolation transformer and line driver IC to absorb bulk surge energy. Use Value: 600 W rating handles 10/1000 μs waveforms per ITU-T K.20/21, reducing need for cascaded protection stages. | Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification, guarding against capacitor failure or regulator fault conditions. IC Role / Device Role / Timing Role: Fast-acting shunt limiter across DC output rails to prevent overvoltage damage to connected USB peripherals or smart home modules. Use Value: Low leakage (<1 μA) avoids loading regulated 5 V/12 V rails during normal operation while responding in <1 ns to fast transients. |
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 (150 V), lower PPPM (400 W), SMA package (larger footprint, higher RθJA) | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 | Select when cost sensitivity outweighs surge margin and board space permits larger SMA outline |
| SMCJ150CA | Same VWM (150 V), higher PPPM (1500 W), SMC package (3.5 mm height, higher thermal mass) | Better suited for high-reliability industrial power supplies with repeated surge exposure | Choose when sustained surge duty cycle exceeds SM6T150CA-M3/5B derating limits above 25 °C ambient |
Compared with SMAJ150CA and SMCJ150CA, SM6T150CA-M3/5B offers optimal balance of surge robustness (600 W), compact SMB footprint, and halogen-free compliance-making it ideal for space-constrained automotive and telecom modules where MSL Level 1 handling and AEC-Q101 upgrade path matter.
Availability
SM6T150CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor units, industrial RS-485 interfaces, and telecom line card designs requiring stable component supply, halogen-free compliance, and MSL Level 1 manufacturability.
Supply support for SM6T150CA-M3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM6T Series is designed for robust, surface-mount transient suppression in automotive, industrial, and communications systems-prioritizing low-profile packaging, repeatable clamping, and qualification-ready variants.
FAQ
What does the "CA" suffix indicate in SM6T150CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration: SM6T150CA-M3/5B clamps voltage transients equally in both polarities, unlike unidirectional "A" variants. This makes SM6T150CA-M3/5B suitable for AC-coupled or floating signal lines where polarity reversal may occur, such as RS-485 buses or transformer-isolated interfaces.
Is SM6T150CA-M3/5B AEC-Q101 qualified?
SM6T150CA-M3/5B itself is not AEC-Q101 qualified; however, the SM6T family offers AEC-Q101 variants under HM3 suffixes (e.g., SM6T150CAHM3_B/I). The M3 suffix indicates halogen-free RoHS compliance only. For automotive-grade qualification, specify the HM3 version with appropriate revision code.
What is the clamping voltage of SM6T150CA-M3/5B at its rated peak pulse current?
The clamping voltage (VC) of SM6T150CA-M3/5B is 207 V measured at 2.9 A peak pulse current using a 10/1000 μs waveform. This value defines the maximum voltage seen by protected circuitry during a standardized surge event and is confirmed in the Vishay SM6T datasheet (Doc. #88385, Rev. 09-Jan-2024).
Can SM6T150CA-M3/5B replace SM6T150A-M3/5B in a design?
No-SM6T150CA-M3/5B and SM6T150A-M3/5B are not interchangeable. SM6T150A-M3/5B is unidirectional (cathode-marked) and conducts only in reverse bias, while SM6T150CA-M3/5B is bidirectional with no polarity marking. Substituting one for the other risks incorrect clamping behavior or open-circuit failure in DC-biased applications.
What PCB pad layout is required to achieve the full 600 W rating for SM6T150CA-M3/5B?
To achieve the full 600 W peak pulse power rating, SM6T150CA-M3/5B must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay SM6T datasheet. Smaller pads reduce thermal dissipation and require derating per Figure 2; inadequate copper area may cause premature thermal failure during surge events.
SM6T150CA-M3/5B 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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T150CA-M3/5B FAQ
1.How can I place an order for SM6T150CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150CA-M3/5B 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 SM6T150CA-M3/5B reliable?
The price and inventory of SM6T150CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T150CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T150CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150CA-M3/5B?
SM6T150CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150CA-M3/5B 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 SM6T150CA-M3/5B?
For technical support, including SM6T150CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150CA-M3/5B requirements.
6.How does Aetrix verify that SM6T150CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T150CA-M3/5B 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 SM6T150CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T150CA-M3/5B?
All SM6T150CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150CA-M3/5B, 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 SM6T150CA-M3/5B part is unused and in its original packaging.
Return procedure for SM6T150CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150CA-M3/5B Tags
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