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Vishay General Semiconductor - Diodes Division SM6T39AHE3_A/I
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- Part No.:
- SM6T39AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T39AHE3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,521
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Product details
Overview
SM6T39AHE3_A/I 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 max clamping voltage (VC) at 11.1 A IPPM, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T39AHE3_A/I datasheet, SM6T39AHE3_A/I pinout, SM6T39AHE3_A/I application, or SM6T39AHE3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, RoHS-compliant AEC-Q101 qualification, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional overvoltage protection device, leveraging an avalanche breakdown mechanism to clamp transient surges before they damage downstream ICs or MOSFETs. Its low-inductance SMB package and glass-passivated junction ensure fast response (<1 ns) and stable performance across -65 °C to +150 °C junction temperature range.
The device is rated for 600 W peak pulse power per 10/1000 μs waveform and exhibits 100 °C/W typical junction-to-ambient thermal resistance. It supports single-pulse IFSM of 100 A (10 ms half-sine) and maintains <1.0 μA reverse leakage at VWM, enabling reliable operation in low-power sensor interfaces and automotive control modules.
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 - Confirmed avalanche breakdown range for reliable triggering |
| VC @ IPPM | 53.9 V at 11.1 A - Clamped voltage during 600 W transient, limiting stress on protected circuitry |
| PPPM | 600 W (10/1000 μs) - Surge energy handling capability compliant with IEC 61000-4-5 Level 4 |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements (HTOL, TCT, etc.) |
| RθJA | 100 °C/W - Thermal performance baseline for PCB pad layout design (0.2" × 0.2" Cu) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 molding compound. Polarity indicated by cathode band on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection configuration |
| Cathode | Current exit terminal during forward conduction; clamping node during reverse surge | Connected to protected line (e.g., 12 V rail or CAN signal); marked with band on package |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 pulse 5a/b and IEC 61000-4-5 surges in 12 V automotive systems |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns response), critical for protecting high-speed interfaces |
| AEC-Q101 qualified (HE3 suffix) | Validates reliability for automotive applications including engine control units and ADAS sensor modules |
| RoHS-compliant & halogen-free option available | Meets EU ELV and OEM chemical compliance requirements without compromising electrical performance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 35 V, 400 ms) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input stage of power management IC. Use Value: Limits clamped voltage to 53.9 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Protecting analog output lines (4–20 mA) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-mode protector on sensor transmitter output, shunting ESD and switching noise. Use Value: Maintains <1.0 μA leakage at 33.3 V, avoiding measurement error while clamping 8 kV contact ESD per IEC 61000-4-2. |
| Automotive Lighting Control | Telecom Power Supply Input |
Use Scenario: Safeguarding LED driver IC inputs against inductive kickback from relay-controlled headlamp circuits. IC Role / Device Role / Timing Role: Fast-response clamping device on VDD pin of LED controller, placed adjacent to connector. Use Value: Responds within nanoseconds to 100 V/μs transients, holding voltage below 54 V to prevent gate oxide failure in integrated MOSFETs. | Use Scenario: Front-end surge suppression on 48 V telecom rectifier outputs feeding base station backplane logic. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC distribution bus prior to point-of-load regulators. Use Value: Handles 600 W pulses without degradation, supporting repeated lightning-induced surges per GR-1089-CORE. |
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-E3/5B | Same SMB package, 33 V VWM, but 53.3 V VC @ 11.3 A; not AEC-Q101 qualified | Commercial-grade only; unsuitable for automotive production without additional qualification | Select when cost sensitivity outweighs automotive qualification requirement |
| 1.5SMC33A | Higher 1500 W PPPM rating, larger SMC (DO-214AB) package, 53.3 V VC @ 28.3 A | Requires larger PCB footprint and higher surge margin; used where system-level testing exceeds 600 W | Choose for industrial UPS or PoE injectors needing higher energy absorption |
Compared with SMAJ33A-E3/5B and 1.5SMC33A, SM6T39AHE3_A/I delivers AEC-Q101 assurance in a compact SMB outline while maintaining identical clamping voltage and thermal profile-making it optimal for space-constrained automotive modules requiring zero qualification overhead.
Availability
SM6T39AHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom power supply input applications requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SM6T39AHE3_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, MOSFETs, and protection devices with emphasis on reliability and application-specific validation.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of SM6T39AHE3_A/I under a 10/1000 μs surge?
The SM6T39AHE3_A/I has a maximum clamping voltage (VC) of 53.9 V when subjected to its rated peak pulse current of 11.1 A using a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T39AHE3_A/I maintains this clamping performance across its operational temperature range.
Is SM6T39AHE3_A/I suitable for automotive applications?
Yes, SM6T39AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024). It undergoes stress testing for high-temperature operating life, temperature cycling, and mechanical shock-validating its use in engine control units, body electronics, and ADAS sensor modules. The SM6T39AHE3_A/I meets automotive-grade reliability requirements without requiring additional customer qualification.
What does the "HE3" suffix indicate in SM6T39AHE3_A/I?
The "HE3" suffix in SM6T39AHE3_A/I denotes RoHS-compliant construction and AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3) and halogen-free AEC-Q101 variants (HM3). The "A/I" further specifies packaging: 13-inch tape-and-reel (I) with 3200-unit quantity and revision code A. The SM6T39AHE3_A/I thus combines automotive reliability, environmental compliance, and high-volume SMT readiness.
How does SM6T39AHE3_A/I differ from bidirectional TVS diodes like SM6T39CA?
SM6T39AHE3_A/I is unidirectional and features a cathode band for polarity identification, enabling use in DC circuits where reverse conduction must be blocked. In contrast, SM6T39CA is bidirectional with no polarity marking and symmetric clamping in both directions-suited for AC lines or differential data buses. The SM6T39AHE3_A/I offers lower leakage (<1.0 μA at VWM) than its bidirectional counterpart, making it preferable for precision DC sensing paths.
What is the thermal resistance of SM6T39AHE3_A/I, and how does it affect PCB layout?
The SM6T39AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding internal ground planes reduces RθJA. For sustained power dissipation near 5.0 W, the SM6T39AHE3_A/I requires careful thermal management-especially in sealed enclosures-since its TJ max is +150 °C and derating begins above TA = 25 °C.
SM6T39AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T39AHE3_A/I FAQ
1.How can I place an order for SM6T39AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T39AHE3_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 SM6T39AHE3_A/I reliable?
The price and inventory of SM6T39AHE3_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 SM6T39AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T39AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T39AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T39AHE3_A/I?
SM6T39AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T39AHE3_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 SM6T39AHE3_A/I?
For technical support, including SM6T39AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T39AHE3_A/I requirements.
6.How does Aetrix verify that SM6T39AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T39AHE3_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 SM6T39AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T39AHE3_A/I?
All SM6T39AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T39AHE3_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 SM6T39AHE3_A/I part is unused and in its original packaging.
Return procedure for SM6T39AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T39AHE3_A/I Tags
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