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Vishay General Semiconductor - Diodes Division SM15T36AHE3_A/I
- Part No.:
- SM15T36AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36AHE3_A/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM15T36AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.8 V stand-off voltage (VWM), 34.2–37.8 V breakdown voltage (VBR), and 49.9 V clamping voltage (VC) at 30 A peak pulse current - used to protect automotive sensor signal lines, industrial I/O ports, and MOSFET gate drivers against lightning-induced and switching transients.
For engineers reviewing the SM15T36AHE3_A/I datasheet, SM15T36AHE3_A/I pinout, SM15T36AHE3_A/I application, or SM15T36AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low-inductance SMC package, and compliance with IEC 61000-4-5 surge immunity requirements.
Technical Context
This TVS diode operates as a clamping device that transitions from high-impedance standby to low-impedance conduction when reverse voltage exceeds VBR, limiting transient energy to protected circuits via controlled avalanche breakdown. Its glass-passivated junction ensures stable leakage and repeatable clamping performance across temperature.
The SM15T36AHE3_A/I is specified for unidirectional operation only, with cathode band marking, and features thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for normal circuit bias without triggering clamping. |
| VBR min/max | 34.2 V / 37.8 V at 1.0 mA - guaranteed avalanche onset range; defines minimum overvoltage threshold for reliable transient response. |
| VC @ IPPM | 49.9 V at 30.0 A (10/1000 μs) - clamped voltage during worst-case surge; determines maximum stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 1500 W - peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on industrial or automotive lines. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments and enclosed industrial enclosures. |
| RθJA | 75 °C/W - thermal resistance to ambient on standard 8 mm × 8 mm copper pads; informs heatsinking needs for repetitive surge duty cycles. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in unidirectional TVS configuration. | Provides return path for clamped surge current; must be routed with minimal inductance to maintain low VC. |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., CAN_H, sensor output, MOSFET gate). | Defines polarity-sensitive placement; band-marked end must face protected node to ensure correct clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for engine control, ADAS sensor, and infotainment modules. |
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against severe transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 combination wave surges. |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage (<1.0 μA at VWM), and long-term parameter stability under thermal stress. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., <100 ns edges); critical for protecting high-speed interfaces like LIN or SENT. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine bay or chassis modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor output and ECU input to shunt transient energy to ground before it reaches ADC front-end. Use Value: Limits clamped voltage to ≤49.9 V, preserving integrity of 3.3 V or 5 V rail-tied signal conditioning ICs and preventing latch-up in microcontroller inputs. |
Use Scenario: Safeguarding RS-485, CAN, or digital I/O lines on PLC backplanes and motor drive controllers subject to inductive kickback and lightning coupling. IC Role / Device Role / Timing Role: Standoff-clamp TVS installed at connector interface to absorb 10/1000 μs surges before they propagate into isolation barriers or transceiver ICs. Use Value: Withstands 30 A peak pulse current while maintaining VC ≤49.9 V, ensuring compatibility with ISO 11898-2 common-mode surge limits and avoiding transceiver damage. |
| MOSFET Gate Driver Protection | Telecom Power Line Surge Suppression |
|
Use Scenario: Shielding high-side N-channel MOSFET gate drivers in DC-DC converters and inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS placed between gate and source to clamp dV/dt-induced overshoot and prevent gate oxide rupture. Use Value: Sub-1 ns response time and 49.9 V clamping enable safe operation with 60 V-rated MOSFETs, reducing need for oversized gate resistors or snubbers. |
Use Scenario: Front-end surge suppression on 48 V telecom power feeds entering base station equipment or remote radio units. IC Role / Device Role / Timing Role: Primary-level TVS mounted at power entry point to divert IEC 61000-4-5 4 kV surges before they reach DC/DC converters and PMICs. Use Value: 1500 W rating and 30.8 V VWM allow direct integration with -48 V nominal systems while maintaining margin above steady-state operating voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | Same VWM (30.8 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lighter-duty transients (e.g., ESD, low-energy switching noise); unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4. | Select SMAJ36A-E3/57T only for space-constrained consumer or non-automotive designs where surge threat level is below 1 kV. |
| 1.5KE36A | Through-hole DO-201 package, same VWM/VBR, identical PPPM (1500 W), but no AEC-Q101 qualification and higher mounting inductance. | Not suitable for automated SMT production or automotive vibration environments; requires manual assembly and larger PCB real estate. | Choose 1.5KE36A only for legacy through-hole prototyping or industrial panels where reflow compatibility and automotive qualification are not required. |
Compared with SMAJ36A-E3/57T and 1.5KE36A, the SM15T36AHE3_A/I uniquely combines AEC-Q101 qualification, SMC package manufacturability, and full 1500 W surge capability - making it the only option qualified for volume automotive production with zero compromise on transient robustness or assembly yield.
Availability
SM15T36AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power entry circuits requiring stable component supply, AEC-Q101 compliance, and consistent surge immunity performance across production batches.
Supply support for SM15T36AHE3_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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SM15T Series was designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and telecom infrastructure where failure modes must be predictable (short-circuit) and performance must remain stable over temperature and lifetime.
FAQ
What is the clamping voltage of SM15T36AHE3_A/I at its rated peak pulse current?
The SM15T36AHE3_A/I has a maximum clamping voltage (VC) of 49.9 V when subjected to a 10/1000 μs waveform at 30.0 A peak pulse current (IPPM). This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T36AHE3_A/I maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is SM15T36AHE3_A/I qualified for automotive applications?
Yes, SM15T36AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's SM15T Series datasheet (Rev. 09-Jan-2024, Doc. #88380). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making the SM15T36AHE3_A/I suitable for engine control units, ADAS sensors, and body electronics where automotive-grade reliability is mandatory.
What does the "HE3_A/I" suffix mean in SM15T36AHE3_A/I?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification; "A" denotes unidirectional polarity; "I" specifies packaging in 13-inch diameter plastic tape and reel with 3500 units per reel. This ordering code ensures traceability, automotive compliance, and compatibility with high-volume SMT assembly lines - all verified in Vishay's official ordering information table on page 2 of document 88380.
How does SM15T36AHE3_A/I differ from bidirectional TVS diodes like SM15T36CA?
The SM15T36AHE3_A/I is unidirectional and features a cathode band for polarity-sensitive placement, whereas SM15T36CA is bidirectional with no polarity marking and symmetric clamping in both directions. The SM15T36AHE3_A/I is intended for DC-biased lines (e.g., sensor outputs, gate drives), while SM15T36CA suits AC-coupled or differential interfaces like RS-485. Their VBR and VC values differ slightly due to internal structure - SM15T36AHE3_A/I has VBR = 34.2–37.8 V, SM15T36CA has VBR = 36.0–40.0 V.
What is the thermal resistance of SM15T36AHE3_A/I, and how does it affect layout?
The SM15T36AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as defined in Vishay document 88380. To maintain safe junction temperatures during repetitive surges, PCB layout must provide adequate copper area and thermal vias - reducing pad size or omitting thermal relief increases RθJA and risks exceeding the 150 °C TJ max limit. The SM15T36AHE3_A/I also has RθJL = 15 °C/W, supporting efficient heat transfer to PCB traces.
SM15T36AHE3_A/I 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SM15T36AHE3_A/I FAQ
1.How can I place an order for SM15T36AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36AHE3_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 SM15T36AHE3_A/I reliable?
The price and inventory of SM15T36AHE3_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 SM15T36AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T36AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36AHE3_A/I?
SM15T36AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36AHE3_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 SM15T36AHE3_A/I?
For technical support, including SM15T36AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36AHE3_A/I requirements.
6.How does Aetrix verify that SM15T36AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T36AHE3_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 SM15T36AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T36AHE3_A/I?
All SM15T36AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36AHE3_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 SM15T36AHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T36AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36AHE3_A/I Tags
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