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Vishay General Semiconductor - Diodes Division SM6T36CAHE3/5B
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- Part No.:
- SM6T36CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36CAHE3/5B.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,305
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Product details
Overview
SM6T36CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 36 V standoff voltage (VWM), 49.9 V clamping voltage at 12 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines, I/O ports, and MOSFET gate drivers.
For engineers reviewing the SM6T36CAHE3/5B datasheet, SM6T36CAHE3/5B pinout, SM6T36CAHE3/5B application, or SM6T36CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (1.39), TJ = −65 °C to +150 °C operating range, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at 30.8 V), while the SMB package delivers low parasitic inductance critical for fast transient response.
The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports 100 A non-repetitive forward surge (IFSM), and exhibits thermal resistance RθJA = 100 °C/W - making it suitable for compact, thermally constrained automotive and industrial PCBs where board space and reliability are tightly coupled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - maximum continuous reverse working voltage before clamping begins |
| VBR min/max | 34.2 V / 37.8 V at 1.0 mA - precise bidirectional breakdown threshold for predictable turn-on |
| VC @ IPPM | 49.9 V at 12.0 A (10/1000 μs) - clamping voltage limiting downstream component stress during surge |
| PPPM | 600 W - peak transient energy absorption capacity under standardized surge waveform |
| TJ range | −65 °C to +150 °C - full automotive-grade junction temperature operation without derating |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements (HTOL, TC, HTRB, etc.) |
Pinout & Package
SMB (DO-214AA) package: molded plastic body with matte tin-plated leads, 0.220" × 0.130" (5.59 mm × 3.30 mm) outline, cathode band omitted (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; accepts reverse surge current during negative transients |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical PN junction; accepts reverse surge current during positive transients |
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 line-earth, 2 kV line-line) in properly designed layouts |
| AEC-Q101 qualification | Validated for under-hood automotive applications including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR = 1.39) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Allows direct placement into high-temperature reflow profiles without dry-pack or baking requirements |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before reaching signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and precision ADCs during 12 V system transients up to ±300 V. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid valves and motor contactors. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC input channels, mounted adjacent to terminal block. Use Value: Maintains functional safety integrity by limiting transient voltage to <50 V, ensuring SIL-2 compliant operation per IEC 61000-4-4/5. |
| USB/Communication Interface | MOSFET Gate Driver Protection |
Use Scenario: ESD and surge protection for USB 2.0 data lines (D+/D−) and RS-485 differential pairs in industrial gateways. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with signal traces to absorb ±8 kV contact ESD (IEC 61000-4-2) and fast transients. Use Value: Preserves signal integrity with <10 pF junction capacitance at zero bias, avoiding data rate degradation above 480 Mbps. | Use Scenario: Clamping Miller-induced voltage spikes across high-side N-channel MOSFET gates driven by bootstrap circuits in motor inverters. IC Role / Device Role / Timing Role: Fast-response clamp between gate and source to prevent dv/dt-induced false turn-on and gate oxide rupture. Use Value: Limits gate-source overvoltage to ≤50 V during 100 ns switching events, extending MOSFET lifetime in 48 V BLDC drives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Same VWM (30.8 V), lower PPPM (400 W), SMA package (larger RθJA = 150 °C/W) | Limited to lower-energy transients; less suitable for automotive load-dump scenarios | Choose when cost sensitivity outweighs peak power margin and board space allows larger footprint |
| 1.5KE36CA | Higher PPPM (1500 W), axial lead DO-201 package, no AEC-Q101 qualification | Requires through-hole assembly; not qualified for automotive under-hood use | Prefer for legacy industrial equipment where reflow compatibility and automotive compliance are not required |
Compared with SMAJ36CA and 1.5KE36CA, SM6T36CAHE3/5B offers superior power density (600 W in SMB), automotive qualification, and SMT process compatibility - making it optimal for space-constrained, high-reliability automotive and industrial designs requiring validated surge immunity.
Availability
SM6T36CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB/RS-485 communication ports, and MOSFET gate driver circuits requiring stable component supply and long-term production continuity.
Supply support for SM6T36CAHE3/5B 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 compliance, low clamping voltage, and consistent SMT manufacturability are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T36CAHE3/5B?
The "CA" suffix in SM6T36CAHE3/5B denotes a bidirectional configuration - meaning the device functions identically for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SM6T36A), SM6T36CAHE3/5B has no polarity marking and provides symmetrical clamping, making it ideal for AC-coupled or floating signal paths where transient direction is unpredictable.
Is SM6T36CAHE3/5B qualified for automotive applications?
Yes, SM6T36CAHE3/5B is AEC-Q101 qualified, as confirmed by its HE3 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 unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics.
What is the clamping voltage of SM6T36CAHE3/5B at its rated peak pulse current?
The clamping voltage (VC) of SM6T36CAHE3/5B is 49.9 V at 12.0 A peak pulse current with a 10/1000 μs waveform, per the Electrical Characteristics table in the Vishay SM6T datasheet. This value reflects the maximum voltage seen across the device during standardized surge events and directly determines the overvoltage stress imposed on downstream components.
How does the SMB package of SM6T36CAHE3/5B compare to SMA in thermal performance?
SM6T36CAHE3/5B in SMB (DO-214AA) package has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, versus ~150 °C/W for SMA-packaged equivalents like SMAJ36CA. The lower RθJA enables better heat dissipation in dense layouts and supports higher sustained power handling - especially important in automotive applications where ambient temperatures exceed 85 °C.
Can SM6T36CAHE3/5B be used in place of SM6T36A in an existing design?
No - SM6T36CAHE3/5B is bidirectional while SM6T36A is unidirectional; they are not functionally interchangeable without circuit review. SM6T36A requires correct polarity orientation (cathode band) and only clamps positive transients, whereas SM6T36CAHE3/5B clamps both polarities symmetrically. Substituting one for the other may result in unprotected negative transients or unintended conduction paths.
SM6T36CAHE3/5B 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T36CAHE3/5B FAQ
1.How can I place an order for SM6T36CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36CAHE3/5B 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 SM6T36CAHE3/5B reliable?
The price and inventory of SM6T36CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T36CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T36CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36CAHE3/5B?
SM6T36CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36CAHE3/5B 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 SM6T36CAHE3/5B?
For technical support, including SM6T36CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36CAHE3/5B requirements.
6.How does Aetrix verify that SM6T36CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T36CAHE3/5B 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 SM6T36CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T36CAHE3/5B?
All SM6T36CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36CAHE3/5B, 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 SM6T36CAHE3/5B part is unused and in its original packaging.
Return procedure for SM6T36CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T36CAHE3/5B Tags
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