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Vishay General Semiconductor - Diodes Division SM6T39AHE3_B/H
- Part No.:
- SM6T39AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T39AHE3_B/H.pdf
- Description:
- 600W,39V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,229
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Product details
Overview
SM6T39AHE3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 11.1 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform. It is AEC-Q101 qualified and RoHS-compliant, used for automotive sensor line protection.
For engineers reviewing the SM6T39AHE3_B/H datasheet, SM6T39AHE3_B/H pinout, SM6T39AHE3_B/H application, or SM6T39AHE3_B/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T39AHE3_B/H operates as a unidirectional avalanche diode, triggering 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 low inductance for fast transient response.
It delivers 600 W peak pulse power handling per 10/1000 μs waveform with clamping limited to 53.9 V at 11.1 A, enabling robust protection of downstream ICs and MOSFETs. Thermal design relies on RθJL = 20 °C/W to lead and RθJA = 100 °C/W to ambient, requiring minimum pad layout per DO-214AA specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - Ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 53.9 V at 11.1 A (10/1000 μs) - Limits protected circuit voltage during surge |
| PPPM | 600 W - Peak transient energy absorption capacity under standard waveform |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments |
| RθJA | 100 °C/W - Requires PCB copper pad area ≥ 5.0 mm × 5.0 mm per terminal for thermal derating |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected line ground or low-side reference; carries full IPPM during clamping |
| Cathode | Reverse voltage sensing / Clamping output node | Marked with band; connects to line being protected; defines VWM and VBR polarity |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity without external series impedance |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime; reduces parameter drift in automotive cycles |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS sensor interfaces |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulses) |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and ground, triggered only during overvoltage events. Use Value: Limits voltage to ≤53.9 V during 10/1000 μs surges up to 11.1 A, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff device in parallel with optocoupler input, conducting only during transient excursions above 33.3 V. Use Value: Withstands repeated 600 W pulses while maintaining <1.0 μA leakage at 24 V, ensuring stable logic threshold detection during normal operation. |
| Consumer Power Adapter Output | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression on 12–19 V DC outputs of wall adapters and USB PD chargers exposed to ESD and capacitive coupling. IC Role / Device Role / Timing Role: Fast-response shunt element across output capacitor, activated within nanoseconds of transient onset. Use Value: Clamps 1 kV EFT bursts to <54 V, preventing damage to downstream DC-DC regulators and USB port controllers. |
Use Scenario: Protecting Ethernet PHY or RS-485 transceiver pins from lightning-induced surges on outdoor telecom links and building automation networks. IC Role / Device Role / Timing Role: Primary-level surge diverter mounted at connector entry point, upstream of common-mode chokes. Use Value: Handles 10/1000 μs surges up to 600 W while maintaining low capacitance (<100 pF), avoiding signal integrity degradation at 100 Mbps. |
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-E3/5B | Same SMB package, 36 V VWM, 40–44.2 V VBR, 58.1 V VC @ 10.3 A; lower PPPM (400 W) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin |
| 1.5SMC39A | SMB-compatible but larger SMC (DO-214AB) package; same 33.3 V VWM, 37.1–41.0 V VBR, 53.9 V VC; higher thermal mass | Better power dissipation in high-ambient environments; incompatible with tight SMB footprints | Choose when board space allows larger case and enhanced thermal performance is required |
Compared with SMAJ36A-E3/5B and 1.5SMC39A, SM6T39AHE3_B/H uniquely combines AEC-Q101 qualification, 600 W surge rating in compact SMB, and verified 100 °C/W thermal resistance-making it optimal for space-constrained automotive and industrial designs requiring certified reliability.
Availability
SM6T39AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, consumer power adapter outputs, and telecom line protection requiring stable component supply across production lifecycles.
Supply support for SM6T39AHE3_B/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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SM6T Series is engineered for high-reliability transient suppression in automotive, industrial, and consumer systems-designed to meet stringent surge immunity standards while supporting automated SMT manufacturing.
FAQ
What is the polarity configuration of SM6T39AHE3_B/H?
The SM6T39AHE3_B/H is a unidirectional transient voltage suppressor diode. Its cathode is marked by a visible band on the SMB package body, and it conducts only when reverse-biased beyond its breakdown voltage. This polarity ensures precise clamping on positive-going transients relative to ground, making it suitable for DC power rail and signal line protection where directionality matters.
Is SM6T39AHE3_B/H qualified for automotive applications?
Yes, SM6T39AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation revision 09-Jan-2024. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-validating its use in automotive body electronics, infotainment, and ADAS sensor modules.
What is the maximum clamping voltage of SM6T39AHE3_B/H under standard surge conditions?
The SM6T39AHE3_B/H has a maximum clamping voltage (VC) of 53.9 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 11.1 A. This value is measured per Figure 1 and Table on page 2 of Vishay document 88385 and defines the upper voltage limit imposed on protected circuitry during surge events.
Does SM6T39AHE3_B/H require special PCB layout considerations?
Yes, SM6T39AHE3_B/H requires mounting on minimum 5.0 mm × 5.0 mm copper pads per terminal to achieve specified thermal performance and 600 W pulse rating. The SMB footprint must follow Vishay's recommended pad layout (0.086" min. width, 0.220" ref. length), and traces should avoid narrow necks to prevent fusing during 100 A IFSM events.
How does the "HE3_B/H" suffix in SM6T39AHE3_B/H affect packaging and compliance?
The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction; "B/H" specifies 7" diameter plastic tape and reel packaging with 750 units per reel. This format supports automated pick-and-place and ensures traceability for automotive production, with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2.
SM6T39AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- 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):
- 11.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T39AHE3_B/H FAQ
1.How can I place an order for SM6T39AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T39AHE3_B/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 SM6T39AHE3_B/H reliable?
The price and inventory of SM6T39AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T39AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T39AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T39AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T39AHE3_B/H?
SM6T39AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T39AHE3_B/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 SM6T39AHE3_B/H?
For technical support, including SM6T39AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T39AHE3_B/H requirements.
6.How does Aetrix verify that SM6T39AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T39AHE3_B/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 SM6T39AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T39AHE3_B/H?
All SM6T39AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T39AHE3_B/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 SM6T39AHE3_B/H part is unused and in its original packaging.
Return procedure for SM6T39AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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