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Vishay General Semiconductor - Diodes Division SM15T39AHE3/57T
- Part No.:
- SM15T39AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39AHE3/57T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,324
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Product details
Overview
SM15T39AHE3/57T 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), 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR at 1 mA), and 53.9 V maximum clamping voltage (VC) at 28.0 A peak pulse current. It protects MOSFETs and signal lines in automotive powertrain control units against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T39AHE3/57T datasheet, SM15T39AHE3/57T pinout, SM15T39AHE3/57T application, or SM15T39AHE3/57T equivalent, key selection criteria include verified clamping performance at 28.0 A IPPM, AEC-Q101 qualification for automotive use, unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with sensitive downstream circuitry, triggering into low-impedance conduction when reverse voltage exceeds its 37.1–41.0 V breakdown range. Its glass-passivated junction ensures stable leakage (<1.0 μA at 33.3 V) and robust surge handling up to 200 A IFSM (10 ms half-sine).
Designed for high-source-impedance transient environments, it delivers 53.9 V clamping at 28.0 A (10/1000 μs), with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W. The SMC package supports MSL Level 1 reflow (peak 260 °C) and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail. |
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - Confirmed breakdown threshold range; defines precise turn-on window for transient response. |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - Clamped voltage seen by protected IC during worst-case surge; limits stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability under standardized 10/1000 μs waveform; validates lightning & switching transient immunity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with derated power above 25 °C. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability per stress-test standard; required for powertrain and body-control modules. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, footprint compatible with JEDEC DO-214AB outline (0.220–0.246" width, 0.305–0.320" length). Cathode identified by single black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path; defines reference for clamping action during overvoltage events. |
| Cathode | Reverse voltage input / Clamping output node | Connected to protected line (e.g., 33 V supply rail); conducts surge current to ground when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validated surge energy absorption for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 compliance in automotive systems. |
| Glass passivated chip junction | Ensures stable VBR tolerance and low leakage (<1.0 μA) across temperature and lifetime, critical for battery-backed circuits. |
| Low inductance design | Minimizes voltage overshoot during fast transients (e.g., <10 ns rise time), improving clamping fidelity for high-speed signal lines. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without popcorn cracking or delamination; eliminates pre-bake requirement in SMT lines. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive I/O Protection |
|---|---|
|
Use Scenario: Protecting 33 V CAN FD transceiver power rails and GPIOs in engine control units exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 33 V supply and ground, triggered within nanoseconds of overvoltage onset. Use Value: Limits transient voltage to ≤53.9 V during 28 A surges, preventing latch-up or gate oxide damage in 33 V-rated CAN PHY ICs. |
Use Scenario: Safeguarding analog sensor inputs (e.g., current shunt amplifiers) on PLC analog I/O modules connected to 24–48 V industrial field wiring. IC Role / Device Role / Timing Role: Standoff-mode protector on signal conditioning front-end, absorbing induced surges from nearby motor contactor switching. Use Value: Maintains signal integrity by clamping transients before they exceed amplifier input common-mode range, avoiding saturation or offset shift. |
| Telecom DC Power Feeds | Consumer Appliance Mainboard 33 V Rails |
|
Use Scenario: Shielding PoE-powered Ethernet switch DC-DC converter inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage TVS on 33 V intermediate bus, coordinated with upstream MOVs and downstream ceramic filters. Use Value: Absorbs 1500 W surge energy without failure, maintaining open-circuit protection until replacement-fail-safe short-circuit mode prevents fire hazard. |
Use Scenario: Securing 33 V auxiliary supply feeding microcontroller peripherals and display backlight drivers in smart home hubs. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) unidirectional suppressor placed adjacent to LDO input, minimizing standby power loss. Use Value: Enables AEC-Q101 reliability in consumer-grade products, extending field life beyond 10 years under repeated surge exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Lower PPPM (400 W), higher VC (53.3 V @ 7.5 A), same SMC package but non-AEC-Q101 qualified. | Limited to commercial-grade consumer/industrial use; insufficient for automotive load-dump testing. | Select only for cost-sensitive non-automotive designs where 28 A surge current is not required. |
| SMCJ33AHE3/57T | Higher PPPM (1500 W), identical VWM/VBR/VC, same AEC-Q101 qualification, but larger SMC package variant with enhanced thermal dissipation (RθJA = 50 °C/W). | Better suited for high-ambient-temperature environments (>105 °C) or sustained surge duty cycles. | Prefer when board layout allows larger footprint and thermal management demands exceed SM15T series capability. |
Compared with SMAJ33A-E3/57T and SMCJ33AHE3/57T, SM15T39AHE3/57T delivers optimal balance of AEC-Q101 compliance, 1500 W surge rating, and compact SMC footprint-making it the preferred choice for space-constrained automotive ECUs requiring validated 28 A clamping performance.
Availability
SM15T39AHE3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive I/O protection, and telecom DC power feed applications requiring stable component supply, AEC-Q101 traceability, and consistent 1500 W transient immunity.
Supply support for SM15T39AHE3/57T 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, precision, and automotive qualification.
The SM15T Series was engineered specifically for high-energy transient suppression in automotive and industrial systems, combining AEC-Q101 qualification, 1500 W pulse capability, and SMC package manufacturability for automated assembly.
FAQ
What is the clamping voltage of SM15T39AHE3/57T at its rated peak pulse current?
The SM15T39AHE3/57T has a maximum clamping voltage (VC) of 53.9 V at 28.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and represents the upper voltage limit imposed on protected circuitry during worst-case surge events.
Is SM15T39AHE3/57T qualified for automotive applications?
Yes, SM15T39AHE3/57T is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88380. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, making SM15T39AHE3/57T suitable for powertrain, body control, and ADAS modules.
What does the "HE3/57T" suffix indicate in SM15T39AHE3/57T?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101 qualified construction with matte tin-plated leads; "57T" specifies packaging in 7-inch diameter plastic tape and reel, with 850 units per reel. This format ensures compatibility with high-speed pick-and-place equipment and satisfies automotive traceability requirements.
How does SM15T39AHE3/57T differ from bidirectional TVS diodes like SM15T39CA?
SM15T39AHE3/57T is unidirectional with cathode band marking and conducts only in reverse bias, while SM15T39CA is bidirectional and symmetrical-clamping in both polarities. The unidirectional version offers lower leakage (<1.0 μA) and is used where DC polarity is fixed, such as on positive supply rails; bidirectional types suit AC-coupled or floating signal lines.
What is the thermal resistance of SM15T39AHE3/57T, and how does it affect PCB layout?
SM15T39AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To maintain safe operation, the PCB must provide minimum 8.0 mm × 8.0 mm copper pads per terminal-reducing RθJA and preventing thermal runaway during repetitive surges.
SM15T39AHE3/57T 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SM15T39AHE3/57T FAQ
1.How can I place an order for SM15T39AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39AHE3/57T 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 SM15T39AHE3/57T reliable?
The price and inventory of SM15T39AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T39AHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T39AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39AHE3/57T?
SM15T39AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39AHE3/57T 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 SM15T39AHE3/57T?
For technical support, including SM15T39AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39AHE3/57T requirements.
6.How does Aetrix verify that SM15T39AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T39AHE3/57T 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 SM15T39AHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T39AHE3/57T?
All SM15T39AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39AHE3/57T, 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 SM15T39AHE3/57T part is unused and in its original packaging.
Return procedure for SM15T39AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39AHE3/57T Tags
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