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Vishay General Semiconductor - Diodes Division SM15T36CAHE3/9AT
- Part No.:
- SM15T36CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36CAHE3/9AT.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,253
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Product details
Overview
SM15T36CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 36 V standoff voltage (VWM), and clamping voltage of 49.9 V at 30 A peak pulse current. It provides robust protection for automotive-grade sensor signal lines and I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T36CAHE3/9AT datasheet, SM15T36CAHE3/9AT pinout, SM15T36CAHE3/9AT application, or SM15T36CAHE3/9AT equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 30 A IPPM rating at 49.9 V VC, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) min/max of 34.2 V / 37.8 V at 1 mA test current and maximum reverse leakage (ID) of 1.0 μA at 30.8 V standoff. Its clamping performance is specified under standardized 10/1000 μs waveform conditions, with thermal derating defined per Fig. 2 up to TJ = 150 °C.
The device uses glass-passivated junction technology and meets MSL Level 1 (J-STD-020) with 260 °C peak reflow profile. It exhibits low inductance and is qualified to AEC-Q101 for automotive applications, distinguishing it from commercial-grade variants like SM15T36CA-E3/9AT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - Confirmed breakdown onset range; ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 49.9 V at 30 A (10/1000 μs) - Clamped voltage seen by protected circuit; limits stress on downstream ICs or MOSFETs |
| PPPM | 1500 W - Peak transient energy absorption capability; suitable for lightning surge (IEC 61000-4-5) and motor-switching threats |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; supports reliable power dissipation without external heatsink |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD; required for Tier-1 ECUs and ADAS sensors |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H), cathode band omitted per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive half-cycle) | Conducts surge current during positive voltage excursions; symmetrical with cathode for bidirectional operation |
| Cathode | Transient current entry point (negative half-cycle) | Conducts surge current during negative voltage excursions; electrically 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 constraints |
| AEC-Q101 qualification | Validates reliability for automotive use cases including engine control, infotainment, and camera modules |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity and thermal stress |
| Low-inductance SMC package | Minimizes voltage overshoot during fast transients (<100 ns rise time), critical for high-speed data lines |
| MSL Level 1 compliance | Allows standard reflow soldering without pre-baking; reduces manufacturing complexity and cost |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers in vehicle body control modules from load-dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines to limit transient excursions to <50 V. Use Value: Prevents latch-up or permanent damage to transceivers during 12 V system faults while maintaining signal integrity. |
Use Scenario: Shielding PLC analog input channels (4–20 mA) from field-wiring induced transients in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage shunt device located at terminal block entry point before signal conditioning circuitry. Use Value: Absorbs >1500 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge). |
| Consumer Power Adapter Output | Telecom DC Power Feeds |
Use Scenario: Safeguarding USB-C PD port output stages against reverse-polarity connection and hot-plug transients. IC Role / Device Role / Timing Role: Secondary-level TVS placed after DC-DC converter output filter to clamp residual spikes. Use Value: Limits output voltage excursion to 49.9 V during 30 A transients, protecting connected devices meeting USB PD 3.1 spec. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines in outdoor installations. IC Role / Device Role / Timing Role: Bidirectional clamp across DC supply rails to suppress common-mode and differential-mode surges. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W without parameter shift, ensuring multi-year field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Lower PPPM (400 W), same VWM/VC, SMA package (smaller footprint, higher RθJA) | Limited to lower-energy threats; unsuitable for lightning-level surges per IEC 61000-4-5 | Select when board space is constrained and threat level is limited to ESD/EFT only |
| SMCJ36CAHE3_A | Same 1500 W rating and AEC-Q101 qualification, but HE3 suffix denotes halogen-free variant with HM3 material code | Identical electrical and mechanical specs; differs only in RoHS/halogen-free compliance documentation | Choose when halogen-free certification is mandated by OEM procurement policy |
Compared with SMAJ36CA and SMCJ36CAHE3_A, the SM15T36CAHE3/9AT offers identical automotive qualification and clamping performance but is optimized for high-volume tape-and-reel delivery (3500 pcs/reel) and features tighter VBR tolerance (±5.3% vs ±10% for SMAJ), improving design margin predictability.
Availability
SM15T36CAHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC I/O modules, and telecom power interface designs requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SM15T36CAHE3/9AT 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T36CAHE3/9AT?
The "CA" suffix in SM15T36CAHE3/9AT denotes a bidirectional configuration, meaning the device clamps voltage symmetrically for both positive and negative transients. Unlike unidirectional variants (e.g., SM15T36A), SM15T36CAHE3/9AT has no polarity marking and is used where AC-coupled or floating signal lines require protection without regard to voltage polarity. This is confirmed in Vishay's SM15T datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SM15T36CAHE3/9AT qualified for automotive applications?
Yes, SM15T36CAHE3/9AT is AEC-Q101 qualified, as indicated by the "HE3" suffix and explicitly stated in the Mechanical Data section of the Vishay datasheet (Doc. #88380). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SM15T36CAHE3/9AT suitable for under-hood and cabin-mounted automotive electronics such as ADAS sensors and body control units.
What is the clamping voltage of SM15T36CAHE3/9AT at its rated peak pulse current?
The clamping voltage (VC) of SM15T36CAHE3/9AT is 49.9 V at 30 A peak pulse current with a 10/1000 μs waveform, per the Electrical Characteristics table in the Vishay SM15T datasheet. This value represents the maximum voltage imposed on the protected circuit during a standardized surge event and is a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
How does the SMC (DO-214AB) package of SM15T36CAHE3/9AT affect thermal performance?
The SMC package of SM15T36CAHE3/9AT delivers a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, enabling efficient heat transfer to PCB copper pads without requiring additional heatsinking. When mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal, SM15T36CAHE3/9AT sustains its 1500 W peak pulse rating while limiting junction temperature rise-critical for repeated surge events in industrial controls.
What is the standoff voltage (VWM) of SM15T36CAHE3/9AT, and why is it important?
The standoff voltage (VWM) of SM15T36CAHE3/9AT is 30.8 V, representing the maximum continuous reverse voltage the device can withstand without exceeding 1.0 μA leakage current. This parameter ensures the TVS remains non-conductive during normal operation while providing sufficient margin below the 34.2 V minimum breakdown voltage-preventing false triggering and ensuring reliable protection only during actual overvoltage events.
SM15T36CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 30A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T36CAHE3/9AT FAQ
1.How can I place an order for SM15T36CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36CAHE3/9AT 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 SM15T36CAHE3/9AT reliable?
The price and inventory of SM15T36CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T36CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T36CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36CAHE3/9AT?
SM15T36CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36CAHE3/9AT 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 SM15T36CAHE3/9AT?
For technical support, including SM15T36CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36CAHE3/9AT requirements.
6.How does Aetrix verify that SM15T36CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T36CAHE3/9AT 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 SM15T36CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T36CAHE3/9AT?
All SM15T36CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36CAHE3/9AT, 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 SM15T36CAHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T36CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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