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Vishay General Semiconductor - Diodes Division SM6T39AHE3/52
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- Part No.:
- SM6T39AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T39AHE3/52.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,710
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Product details
Overview
SM6T39AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at 1.0 mA), 53.9 V clamping voltage (VC) at 11.1 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines, MOSFET gate drivers, and industrial I/O interfaces.
For engineers reviewing the SM6T39AHE3/52 datasheet, SM6T39AHE3/52 pinout, SM6T39AHE3/52 application, or SM6T39AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 100 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T39AHE3/52 operates as a clamping-type overvoltage protector using an avalanche breakdown mechanism. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at 33.3 V stand-off), while its low-inductance SMB package enables fast response to transients under 1 ns.
Designed for single-polarity surge suppression, it conducts only during reverse overvoltage events - forward conduction is limited to 100 A non-repetitive surge (10 ms half-sine). Thermal derating begins above 25 °C ambient, with maximum junction temperature of +150 °C and MSL Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - defines precise avalanche initiation threshold for reliable clamping onset |
| VWM | 33.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 53.9 V at 11.1 A (10/1000 μs) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability per JEDEC standard waveform |
| TJ max. | +150 °C - maximum allowable junction temperature enabling operation in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, measured on 5.0 mm × 5.0 mm PCB copper pads |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts reverse surge current to ground when VIN > VBR |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/3a surges and IEC 61000-4-5 Line-to-Line surges up to 1 kV |
| Glass passivated junction | Ensures long-term VBR stability and <1.0 μA leakage at VWM, critical for low-power sensor biasing |
| AEC-Q101 qualification (HE3) | Validated for automotive applications including engine control units, ADAS camera modules, and body electronics |
| Low-inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns rise time), improving clamping fidelity |
| MSL Level 1, 260 °C peak reflow | Enables direct integration into high-volume SMT assembly without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O 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 cabins and powertrains. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground, activated within nanoseconds of overvoltage event. Use Value: Limits transient voltage to ≤53.9 V, preventing damage to 3.3 V/5 V interface ICs and preserving signal integrity during 100 A load-dump events. | Use Scenario: Safeguarding digital input terminals of programmable logic controllers against field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Front-end surge limiter on 24 V DC inputs, absorbing energy from relay coil flyback and electrostatic discharge. Use Value: Withstands repeated 600 W pulses without degradation, extending maintenance intervals and reducing spurious fault trips in harsh EMI environments. |
| MOSFET Gate Driver Protection | Consumer Power Adapter ESD Suppression |
Use Scenario: Shielding high-side N-channel MOSFET gates from Miller-induced voltage spikes during fast switching in DC-DC converters and motor drives. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100 pF at 0 V) unidirectional clamp between gate and source, triggered only during overvoltage. Use Value: Prevents gate oxide rupture while adding <0.5 ns propagation delay, maintaining PWM timing accuracy and efficiency. | Use Scenario: Suppressing ESD events on USB-C CC lines and auxiliary power rails in wall adapters certified to IEC 61000-4-2 Level 4 (±15 kV air). IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary Y-cap filtering, providing final-stage clamping before controller ICs. Use Value: Delivers <100 ns response and <1.0 μA leakage at 33.3 V, ensuring no standby current penalty while meeting UL/EN 62368-1 requirements. |
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-E3/52 | Lower VBR (34.2–37.8 V), same SMB package, 400 W PPPM, non-AEC-Q101 | Rated for commercial/industrial use only; not qualified for automotive under-hood deployment | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is not required |
| SMCJ36A-QH | Same VBR range, higher PPPM (1500 W), SMC (DO-214AB) package, AEC-Q101 qualified | Larger footprint (7.11 mm × 6.22 mm vs. SMB's 4.57 mm × 3.94 mm); higher thermal mass | Choose when system-level surge immunity requires >600 W rating and PCB space permits larger package |
Compared with SMAJ36A-E3/52 and SMCJ36A-QH, the SM6T39AHE3/52 uniquely balances AEC-Q101 compliance, compact SMB footprint, and 600 W surge capacity - making it optimal for space-constrained automotive modules where qualification and reliability are mandatory but board area is limited.
Availability
SM6T39AHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and MOSFET gate driver circuits requiring stable component supply across production lifecycles.
Supply support for SM6T39AHE3/52 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific validation.
The SM6T Series was developed specifically for high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-inductance packaging, and tightly controlled clamping performance.
FAQ
What is the exact breakdown voltage range for SM6T39AHE3/52?
The SM6T39AHE3/52 has a guaranteed breakdown voltage (VBR) range of 37.1 V to 41.0 V at a test current of 1.0 mA, per Vishay's datasheet revision 09-Jan-2024. This ±5% tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in safety-critical circuits such as automotive ADAS sensors.
Is SM6T39AHE3/52 suitable for bidirectional transient protection?
No, SM6T39AHE3/52 is a unidirectional TVS diode - it protects only against reverse-polarity overvoltage events. For bidirectional protection, Vishay offers the SM6T39CA variant (with "CA" suffix). Using SM6T39AHE3/52 in bidirectional applications risks failure during positive-going transients, as it lacks symmetrical clamping capability.
Does SM6T39AHE3/52 require a heatsink for 5.0 W continuous power dissipation?
No - the 5.0 W rating (PD) applies only when mounted on an infinite heatsink at TA = 50 °C. In typical PCB layouts with 5.0 mm × 5.0 mm copper pads per terminal, SM6T39AHE3/52 relies on board-level thermal conduction. Its RθJA of 100 °C/W means it safely dissipates ~0.5 W continuously at 25 °C ambient without external heatsinking.
What does the "HE3" suffix indicate in SM6T39AHE3/52?
"HE3" denotes RoHS-compliant construction with AEC-Q101 qualification - confirming that the SM6T39AHE3/52 has passed automotive-grade stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD22-A114. This distinguishes it from commercial-grade "E3" variants lacking automotive validation.
Can SM6T39AHE3/52 be used in place of SMAJ39A-E3/52?
SM6T39AHE3/52 is not a drop-in replacement for SMAJ39A-E3/52 due to differences in clamping performance: SM6T39AHE3/52 clamps at 53.9 V (11.1 A), while SMAJ39A-E3/52 clamps at 60.3 V (9.0 A). Additionally, SM6T39AHE3/52 is AEC-Q101 qualified; SMAJ39A-E3/52 is not. System-level validation is required before substitution.
SM6T39AHE3/52 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:
- 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):
- 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)
SM6T39AHE3/52 FAQ
1.How can I place an order for SM6T39AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T39AHE3/52 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 SM6T39AHE3/52 reliable?
The price and inventory of SM6T39AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T39AHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T39AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T39AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T39AHE3/52?
SM6T39AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T39AHE3/52 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 SM6T39AHE3/52?
For technical support, including SM6T39AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T39AHE3/52 requirements.
6.How does Aetrix verify that SM6T39AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T39AHE3/52 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 SM6T39AHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T39AHE3/52?
All SM6T39AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T39AHE3/52, 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 SM6T39AHE3/52 part is unused and in its original packaging.
Return procedure for SM6T39AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T39AHE3/52 Tags
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