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Vishay General Semiconductor - Diodes Division SM15T39AHE3_A/H
- Part No.:
- SM15T39AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39AHE3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,402
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Product details
Overview
SM15T39AHE3_A/H from Vishay General Semiconductor is a unidirectional 1500 W Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, with 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR), and 53.9 V clamping voltage (VC) at 28.0 A peak pulse current (IPPM). It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T39AHE3_A/H datasheet, SM15T39AHE3_A/H pinout, SM15T39AHE3_A/H application, or SM15T39AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T39AHE3_A/H operates as a unidirectional avalanche-clamping device, triggered when reverse voltage exceeds its 37.1–41.0 V breakdown range at 1.0 mA test current. Its low-inductance SMC package and glass-passivated junction enable fast response to transient threats up to 1500 W (10/1000 μs).
It features a maximum clamping voltage of 53.9 V at 28.0 A IPPM, ensuring robust overvoltage protection for 3.3 V–24 V rail systems. With a 150 °C max junction temperature and MSL Level 1 rating (260 °C peak reflow), it supports high-reliability automotive applications requiring AEC-Q101 qualification - confirmed by the "HE3" suffix and "A/H" revision code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin for 33 V nominal systems |
| VBR min/max | 37.1 V / 41.0 V at 1.0 mA - tight 10.5% tolerance ensures predictable turn-on across production lots and temperature |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - clamping voltage directly limits stress on downstream ICs during surge events |
| PPPM | 1500 W - peak pulse power handling capability for lightning and inductive switching transients per IEC 61000-4-5 |
| RθJA | 75 °C/W - thermal resistance determines required PCB copper area (8.0 mm × 8.0 mm pads specified) for safe 6.5 W steady-state dissipation |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures without derating below 125 °C ambient |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., CAN_H, power rail, sensor output); band marks this end |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance in many layouts |
| Glass passivated chip junction | Ensures stable VBR and low leakage (<1.0 μA at VWM) over lifetime and humidity exposure |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without popcorn cracking or delamination risk |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring zero-failure field reliability |
| Low inductance layout | Minimizes voltage overshoot during fast-rising transients (e.g., <100 ns edges from relay coil collapse) |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 33.3 V. Use Value: Limits rail voltage to ≤53.9 V during 28 A transients, preventing damage to 36 V-rated LDOs and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry TVS on 4–20 mA or 0–10 V signal lines exposed to motor drive noise. Use Value: Clamps induced spikes before they saturate op-amp inputs or corrupt ADC readings, preserving measurement integrity. |
| Telecom DC Power Interface | Consumer Appliance Motor Control Board |
Use Scenario: Safeguarding PoE-powered switch ports against Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Secondary-level TVS on 48 V DC input stage after primary front-end protection. Use Value: Provides precise 33.3 V standoff and 53.9 V clamping to protect IEEE 802.3bt-compliant PD controllers without overdesign. |
Use Scenario: Suppressing back-EMF from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across motor terminals or H-bridge supply rails to absorb inductive kickback. Use Value: Handles repetitive 200 A IFSM surges and dissipates 6.5 W continuously, extending MOSFET lifespan under frequent start-stop cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Lower PPPM (400 W), higher VWM (33.0 V), same SMC package but non-AEC-Q101 | Rated for commercial/industrial use only; not validated for automotive temperature cycling or HTRB | Select when cost sensitivity outweighs automotive qualification requirements and surge threat level is ≤IEC 61000-4-5 Level 2 |
| 1.5KE39A | Higher VWM (33.2 V), same VBR range, but DO-201 axial package - larger footprint, manual assembly only | Not suitable for automated SMT lines; lacks MSL Level 1 rating and RoHS-compliant HE3 finish | Choose only for legacy through-hole designs where board real estate and reflow compatibility are not constraints |
Compared with SMAJ33A-E3/57T and 1.5KE39A, SM15T39AHE3_A/H delivers 3.75× higher surge power handling, AEC-Q101 validation for automotive deployment, and SMT-ready packaging - making it the optimal choice for new designs targeting IEC 61000-4-5 Level 4 compliance and zero-defect field reliability.
Availability
SM15T39AHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution units, industrial sensor interface modules, telecom DC power supplies, and consumer appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM15T39AHE3_A/H 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 application-specific optimization.
The SM15T Series was engineered for high-energy transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom infrastructure where AEC-Q101 qualification, 1500 W surge capacity, and low-clamp performance are mandatory.
FAQ
What is the clamping voltage of SM15T39AHE3_A/H at its rated peak pulse current?
The SM15T39AHE3_A/H has a maximum clamping voltage (VC) of 53.9 V at 28.0 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T39AHE3_A/H maintains this clamping performance across its operational temperature range.
Is SM15T39AHE3_A/H qualified for automotive applications?
Yes, SM15T39AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code and explicit documentation in Vishay's 88380 datasheet. It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. The "A/H" revision code denotes a specific qualified lot configuration meeting automotive reliability requirements.
What does the "HE3" suffix mean in SM15T39AHE3_A/H?
The "HE3" suffix in SM15T39AHE3_A/H indicates RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. It distinguishes this variant from commercial-grade "E3" parts and halogen-free "HM3" versions. The "A/H" further specifies the revision level and tape-and-reel packaging format (7″ reel, 850 units).
How does SM15T39AHE3_A/H differ from bidirectional TVS diodes like SM15T39CA?
SM15T39AHE3_A/H is unidirectional and features a cathode band for polarity-sensitive placement; it conducts forward current up to 200 A (IFSM) and clamps only in reverse. In contrast, SM15T39CA is bidirectional with symmetric clamping in both directions and no polarity marking. The SM15T39AHE3_A/H is selected for DC power rail protection, while SM15T39CA suits AC lines or differential buses like RS-485.
What is the thermal resistance and recommended PCB layout for SM15T39AHE3_A/H?
SM15T39AHE3_A/H 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 the datasheet. To achieve rated 6.5 W power dissipation and avoid thermal runaway, designers must implement minimum pad dimensions and consider internal copper planes. The SMC (DO-214AB) outline drawing confirms land pattern requirements.
SM15T39AHE3_A/H 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):
- 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_A/H FAQ
1.How can I place an order for SM15T39AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39AHE3_A/H 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_A/H reliable?
The price and inventory of SM15T39AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T39AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T39AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39AHE3_A/H?
SM15T39AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39AHE3_A/H 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_A/H?
For technical support, including SM15T39AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39AHE3_A/H requirements.
6.How does Aetrix verify that SM15T39AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T39AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SM15T39AHE3_A/H?
All SM15T39AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SM15T39AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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