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Vishay General Semiconductor - Diodes Division SM6T36CA-M3/5B
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- Part No.:
- SM6T36CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36CA-M3/5B.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,003
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Product details
Overview
SM6T36CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 36 V breakdown voltage (VBR = 34.2–37.8 V at 1 mA), 600 W peak pulse power (10/1000 μs), and clamping voltage of 49.9 V at 12 A. It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T36CA-M3/5B datasheet, SM6T36CA-M3/5B pinout, SM6T36CA-M3/5B application, or SM6T36CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, 150 °C max junction temperature, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering consistent clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable leakage (<1 μA at 30.8 V) and low inductance for fast response to sub-microsecond transients.
Designed for surface-mount use in space-constrained environments, the device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, and its thermal resistance (RθJA = 100 °C/W) supports operation up to 150 °C junction temperature under defined PCB pad conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - defines reliable conduction onset for bidirectional overvoltage protection |
| VWM | 30.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 49.9 V at 12 A (10/1000 μs) - clamping voltage limiting downstream circuit stress during surge events |
| PPPM | 600 W - peak pulse power handling capacity under standardized lightning-surge waveform |
| TJ max | +150 °C - enables deployment in under-hood automotive and high-temperature industrial enclosures |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMT outline with 5.59 mm body length and 2.20 mm height |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix), MSL Level 1 - supports lead-free manufacturing and environmental requirements |
Pinout & Package
SM6T36CA-M3/5B uses an SMB (DO-214AA) surface-mount package with two terminals: no polarity marking for bidirectional operation. The case is molded compound rated UL 94 V-0; terminals are matte tin-plated for solderability per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive surges relative to cathode; symmetrical with cathode in bidirectional mode |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative surges relative to anode; functionally identical to anode in CA-series devices |
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 (4 kV) surge events when mounted per recommended pad layout |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >1 kV/ns) |
| MSL Level 1 rating | Supports single-reflow assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and microcontroller I/O pins in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient energy before it reaches sensitive analog front-end or digital logic. Use Value: Prevents latch-up and gate oxide damage in 3.3 V/5 V MCUs while maintaining signal integrity on 125 kbps–1 Mbps bus lines. | Use Scenario: Shielding differential CAN H/L lines from coupled transients in factory automation PLCs and motor drives. IC Role / Device Role / Timing Role: Low-inductance parallel clamp absorbing common-mode surges without distorting differential signaling. Use Value: Maintains bus uptime by suppressing >1 kV transients within 1 ns response time, avoiding communication errors or node resets. |
| Consumer Power Adapter Input | Telecom DSL Line Card |
Use Scenario: Safeguarding AC-DC converter primary-side rectifiers and controller ICs against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Front-end transient suppressor placed after fuse and before bridge rectifier to limit let-through energy. Use Value: Enables compliance with IEC 61000-4-5 Ed.3 Class III (2 kV line-earth) with minimal BOM cost increase. | Use Scenario: Protecting ADSL/VDSL line interface ICs from induced surges on outdoor copper pairs in central office equipment. IC Role / Device Role / Timing Role: Symmetrical clamp on tip/ring pair, referenced to isolated ground plane to avoid ground loop injection. Use Value: Reduces field return rates by preventing permanent damage to 12-bit ADCs and line drivers during wet-season surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Same VBR range (34.2–37.8 V), lower PPPM = 400 W, SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤Level 2 |
| SMCJ36CA | Same VBR, higher PPPM = 1500 W, larger SMC package (DO-214AB), RθJA = 35 °C/W | Supports repeated high-energy surges; requires larger pad area and layout revision | Select when system-level testing demands >1000 W margin or extended surge repetition |
Compared with SMAJ36CA and SMCJ36CA, SM6T36CA-M3/5B delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and halogen-free compliance-making it ideal for cost-sensitive automotive and industrial designs where validated Level 4 immunity and SMT scalability are required.
Availability
SM6T36CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor units, industrial CAN bus nodes, and telecom line card protection requiring stable component supply and halogen-free compliance.
Supply support for SM6T36CA-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 specifically for robust, surface-mount transient voltage suppression in automotive, industrial, and communications systems where bidirectional clamping, AEC-Q101 readiness, and automated assembly are essential.
FAQ
What is the breakdown voltage tolerance for SM6T36CA-M3/5B?
The SM6T36CA-M3/5B has a specified breakdown voltage range of 34.2 V to 37.8 V at 1 mA test current, corresponding to ±5.6% tolerance around the nominal 36 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes from −65 °C to +150 °C. The device's bidirectional symmetry guarantees identical behavior in both polarities, critical for protecting AC-coupled interfaces.
Is SM6T36CA-M3/5B suitable for automotive applications?
Yes, SM6T36CA-M3/5B is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; the M3/5B variant is halogen-free and RoHS-compliant but not AEC-Q101 certified. For automotive use, specify SM6T36CAHM3_B/I for AEC-Q101 qualification. The base SM6T36CA-M3/5B remains widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power supplies where its 150 °C TJ max and robust surge rating meet OEM robustness requirements.
How does the clamping voltage of SM6T36CA-M3/5B compare to its standoff voltage?
SM6T36CA-M3/5B has a maximum standoff voltage (VWM) of 30.8 V and a clamping voltage (VC) of 49.9 V at 12 A (10/1000 μs). This 19.1 V differential represents the voltage "let-through" during surge conduction-designed to remain safely below the absolute maximum ratings of typical 3.3 V or 5 V interface ICs. The ratio VC/VWM ≈ 1.62 reflects optimized junction design for low overshoot without excessive leakage at operating bias.
What is the thermal resistance of SM6T36CA-M3/5B and how does it affect PCB layout?
SM6T36CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding internal ground planes reduces RθJA and improves surge endurance. For repeated surge duty cycles, designers must verify junction temperature rise stays below 150 °C using this RθJA and actual power dissipation derived from expected transient frequency and amplitude.
Does SM6T36CA-M3/5B require orientation during PCB placement?
No, SM6T36CA-M3/5B is a bidirectional TVS diode and carries no polarity marking on the SMB package. Unlike unidirectional variants (e.g., SM6T36A), the "CA" suffix indicates symmetrical conduction-both terminals function identically as anode or cathode depending on instantaneous transient polarity. This eliminates orientation checks during automated placement and simplifies layout for differential or floating signal paths, reducing assembly error risk and enabling reuse across AC-coupled interfaces.
SM6T36CA-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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
SM6T36CA-M3/5B FAQ
1.How can I place an order for SM6T36CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36CA-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 SM6T36CA-M3/5B reliable?
The price and inventory of SM6T36CA-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 SM6T36CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T36CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36CA-M3/5B?
SM6T36CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36CA-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 SM6T36CA-M3/5B?
For technical support, including SM6T36CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36CA-M3/5B requirements.
6.How does Aetrix verify that SM6T36CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T36CA-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 SM6T36CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T36CA-M3/5B?
All SM6T36CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36CA-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 SM6T36CA-M3/5B part is unused and in its original packaging.
Return procedure for SM6T36CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T36CA-M3/5B Tags
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