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Vishay General Semiconductor - Diodes Division SM15T36AHE3/9AT
- Part No.:
- SM15T36AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36AHE3/9AT.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,300
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Product details
Overview
SM15T36AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode 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 at 1 mA), and 49.9 V maximum clamping voltage (VC) at 30 A peak pulse current. It protects MOSFETs and signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T36AHE3/9AT datasheet, SM15T36AHE3/9AT pinout, SM15T36AHE3/9AT application, or SM15T36AHE3/9AT equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, unidirectional polarity alignment with DC bias, AEC-Q101 qualification for automotive use, and SMC package thermal performance under 6.5 W steady-state dissipation.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 μA leakage at 30.8 V), but conducts heavily when transient voltage exceeds its 34.2 V minimum breakdown threshold, limiting downstream voltage to ≤49.9 V at 30 A. Its glass-passivated junction ensures stable VBR tolerance and low inductance for fast response.
The SM15T36AHE3/9AT is AEC-Q101 qualified, RoHS-compliant, and rated for operation from –65 °C to +150 °C junction temperature. It uses a single silicon die in an SMC package with matte tin-plated leads, meeting JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile (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 safe DC bias on protected line |
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - Confirmed breakdown range ensures reliable turn-on above system operating voltage with margin |
| VC @ IPPM | 49.9 V at 30 A (10/1000 μs) - Clamping voltage defines worst-case overvoltage seen by downstream IC during surge |
| PPPM | 1500 W - Peak transient power handling capacity; determines survivability against lightning or motor-switching threats |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with adequate PCB copper area |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; requires ≥8 mm × 8 mm copper pads per terminal for full derating |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with cathode band marking. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H). Matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VAK > VBR; polarity must match DC bias direction |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe transients like ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges without derating |
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control units and body electronics modules |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with <1 μA leakage at VWM up to +125 °C |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or switching spikes), improving clamping fidelity |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protects 12 V supply rail and sensor input lines in gasoline/diesel ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and local regulator input or microcontroller analog inputs. Use Value: Limits transient voltage to ≤49.9 V during 12 V system load dump (ISO 7637-2 Pulse 5a), preventing latch-up or gate oxide damage in downstream LDOs and MCUs. | Use Scenario: Shields digital I/O and encoder feedback lines of variable-frequency drives from inductive kickback generated by contactor switching. IC Role / Device Role / Timing Role: Shunt protector on 24 V control logic lines interfacing with PLC outputs and relay coils. Use Value: Clamps 1 kV/1.2–50 μs common-mode surges to <50 V within nanoseconds, preserving signal integrity and preventing false triggering of optocouplers or level shifters. |
| Telecom Power Supply Input | Automotive Body Control Module (BCM) |
Use Scenario: Safeguards primary-side DC-DC converter inputs in telecom base station power supplies subjected to AC line surges and lightning coupling. IC Role / Device Role / Timing Role: Front-end transient suppressor on 48 V input bus prior to active rectification and isolation stages. Use Value: Absorbs 1500 W peak energy from 10/1000 μs surges while maintaining <1 μA leakage at 48 V nominal, minimizing standby power loss. | Use Scenario: Guards LIN bus transceiver pins and LED driver enable lines in BCMs against ESD and cable discharge events. IC Role / Device Role / Timing Role: Localized TVS on each LIN node and lighting output channel, mounted directly at connector entry points. Use Value: Provides sub-50 ns response time and 49.9 V clamping to meet ISO 10605 ESD immunity requirements (±25 kV air, ±20 kV contact) without affecting LIN timing margins. |
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 | 600 W PPPM, SMA package, same VWM/VBR range but lower clamping (58.1 V @ 10.3 A) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); not suitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise |
| 1.5KE36A | Through-hole DO-201 package, 1500 W rating, higher VC (63.6 V @ 23.5 A), no AEC-Q101 qualification | Requires wave soldering; unsuitable for automotive production due to lack of automotive qualification and larger footprint | Choose for cost-sensitive industrial power supplies where AEC-Q101 is not required and through-hole assembly is acceptable |
Compared with SMAJ36A-E3/57T and 1.5KE36A, SM15T36AHE3/9AT delivers superior surge robustness in a surface-mount AEC-Q101-qualified package, enabling direct integration into automotive and high-reliability industrial PCBs without layout or qualification compromises.
Availability
SM15T36AHE3/9AT is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive I/O interfaces, and telecom power supply inputs requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SM15T36AHE3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and automotive-grade qualification.
The SM15T Series was developed specifically for high-power transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where failure modes must be controlled (short-circuit safe) and thermal performance is critical under sustained surge stress.
FAQ
What is the clamping voltage of SM15T36AHE3/9AT at its rated peak pulse current?
The SM15T36AHE3/9AT has a maximum clamping voltage (VC) of 49.9 V at 30 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SM15T36AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is SM15T36AHE3/9AT suitable for automotive applications?
Yes, SM15T36AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It meets stringent reliability, thermal, and surge requirements for under-hood and cabin modules-including engine control units, body control modules, and infotainment power rails. Its failure mode is short-circuit, supporting fail-safe system design. The SM15T36AHE3/9AT is listed in Vishay's automotive-grade product portfolio with full qualification documentation.
What is the difference between SM15T36AHE3/9AT and SM15T36CAHE3/9AT?
SM15T36AHE3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC-biased lines. SM15T36CAHE3/9AT is bidirectional, lacks polarity marking, and protects AC or dual-polarity signals. Their VBR, VWM, and VC values differ accordingly: the bidirectional version has symmetric breakdown in both directions, while the unidirectional SM15T36AHE3/9AT blocks reverse current until VBR is exceeded. Both share identical package, power rating, and AEC-Q101 qualification.
What PCB layout guidance applies to SM15T36AHE3/9AT for optimal thermal performance?
For full-rated 6.5 W steady-state dissipation and 1500 W pulse handling, SM15T36AHE3/9AT requires minimum 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay's datasheet Figure 2. Traces should be wide and short to minimize inductance and thermal resistance. Avoid thermal reliefs on pads; use solid copper pours connected to internal ground/power planes via multiple vias. The SM15T36AHE3/9AT thermal resistance (RθJA) is 75 °C/W under these conditions.
Does SM15T36AHE3/9AT have lead-free and RoHS-compliant construction?
Yes, SM15T36AHE3/9AT is RoHS-compliant and features matte tin-plated leads. The "HE3" suffix confirms compliance with EU RoHS Directive 2011/65/EU and exemption 7a. It also meets JESD201 Class 2 whisker resistance and is halogen-free per Vishay's material categorization standard. All plating and molding compounds in the SM15T36AHE3/9AT meet commercial and automotive environmental requirements.
SM15T36AHE3/9AT 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:
- 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)
SM15T36AHE3/9AT FAQ
1.How can I place an order for SM15T36AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36AHE3/9AT 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 SM15T36AHE3/9AT reliable?
The price and inventory of SM15T36AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T36AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T36AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36AHE3/9AT?
SM15T36AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36AHE3/9AT 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 SM15T36AHE3/9AT?
For technical support, including SM15T36AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36AHE3/9AT requirements.
6.How does Aetrix verify that SM15T36AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T36AHE3/9AT 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 SM15T36AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T36AHE3/9AT?
All SM15T36AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36AHE3/9AT, 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 SM15T36AHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T36AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36AHE3/9AT Tags
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