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Vishay General Semiconductor - Diodes Division SM6T39CAHE3/52
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- Part No.:
- SM6T39CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T39CAHE3/52.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,313
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Product details
Overview
SM6T39CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 600 W peak pulse power (10/1000 μs), and clamping voltage of 53.9 V at 11.1 A. It provides robust ESD and surge protection for automotive sensor signal lines, I/O ports, and MOSFET gate drivers.
For engineers reviewing the SM6T39CAHE3/52 datasheet, SM6T39CAHE3/52 pinout, SM6T39CAHE3/52 application, or SM6T39CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low inductance design, and compatibility with automated SMT placement on standard PCB pads.
Technical Context
The SM6T39CAHE3/52 operates as a bidirectional voltage-clamping device with symmetrical avalanche breakdown in both polarities, enabling protection against positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repeated surge stress.
Designed for surface-mount use on 0.2" × 0.2" copper pads per terminal, it delivers 600 W peak pulse power handling with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation from –65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 33.3 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 53.9 V at 11.1 A (10/1000 μs) - actual clamped voltage during worst-case surge, limiting downstream stress |
| PPPM | 600 W - peak transient power dissipation capability, validated per IEC 61000-4-5 waveform |
| IFSM | Not applicable - bidirectional device has no forward surge rating; only unidirectional variants specify 100 A |
| TJ max. | +150 °C - enables deployment in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline with 5.59 mm body length and 2.20 mm height |
Pinout & Package
SM6T39CAHE3/52 uses an SMB (DO-214AA) surface-mount package with two terminals: anode and cathode. As a bidirectional TVS, it has no polarity marking; both terminals are functionally symmetric and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Accepts reverse surge current during negative transients; forms symmetrical clamping path with cathode |
| Cathode | Transient current entry point (positive polarity) | Accepts reverse surge current during positive transients; forms symmetrical clamping path with anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114 |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when mounted per spec |
| Glass passivated junction | Ensures <1 μA leakage at VWM, stable VBR over lifetime, and immunity to moisture-induced parametric shift |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), critical for protecting high-speed interfaces |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning or special handling |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤53.9 V, preventing latch-up or permanent damage to 3.3 V/5 V sensor signal conditioning circuits. |
Use Scenario: Shielding PLC digital input modules and fieldbus interfaces (RS-485, RS-232) from induced lightning surges and switching noise in factory automation. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on signal lines entering isolated barrier or level-shifting stage. Use Value: Absorbs up to 600 W of transient energy while maintaining <1 μA leakage at 33.3 V, preserving signal integrity during normal operation. |
| Consumer Power Adapter Protection | MOSFET Gate Driver Protection |
Use Scenario: Safeguarding secondary-side feedback circuits and optocoupler inputs in AC/DC adapters against output overvoltage and cross-conduction spikes. IC Role / Device Role / Timing Role: Clamp device across error amplifier output or TL431 reference node to prevent regulator latch-up. Use Value: Fast response (<1 ns) and symmetrical clamping ensure immediate suppression of 100 ns–1 ms overvoltage events without affecting regulation loop stability. |
Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs driven by bootstrap circuits subjected to shoot-through or Miller-induced spikes. IC Role / Device Role / Timing Role: Transient suppressor connected between gate and source to clamp dv/dt-induced voltage excursions. Use Value: Clamps gate-source voltage to ≤53.9 V within nanoseconds, avoiding irreversible gate damage while adding negligible capacitance (<100 pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39CA | Same VBR range (37.1–41.0 V), lower PPPM = 400 W, SMA package (larger footprint, higher RθJA = 150 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W margin is required | Select SMAJ39CA only if board space allows larger SMA and system-level surge testing confirms 400 W sufficiency |
| 1.5KE39CA | Through-hole TO-204AA (DO-41), same VBR/VC, PPPM = 1500 W, but incompatible with SMT assembly | Requires manual or wave soldering; unsuitable for high-density or automated production | Choose 1.5KE39CA only for prototyping or legacy through-hole designs where rework tolerance outweighs SMT efficiency |
Compared with SMAJ39CA and 1.5KE39CA, SM6T39CAHE3/52 uniquely combines AEC-Q101 qualification, SMB footprint compatibility with high-volume pick-and-place, and 600 W pulse rating-making it the preferred choice for automotive and industrial SMT applications demanding reliability and manufacturability.
Availability
SM6T39CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLC I/O modules, consumer power adapter feedback circuits, and MOSFET gate driver protection requiring stable component supply and full traceability.
Supply support for SM6T39CAHE3/52 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 power MOSFETs with emphasis on reliability, precision, and application-specific optimization.
The SM6T Series was engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure-delivering AEC-Q101 qualified, low-inductance, surface-mount TVS solutions with consistent clamping performance across temperature.
FAQ
What does the "CA" suffix indicate in SM6T39CAHE3/52?
The "CA" suffix denotes that SM6T39CAHE3/52 is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SM6T39A), SM6T39CAHE3/52 has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
Is SM6T39CAHE3/52 qualified for automotive applications?
Yes, SM6T39CAHE3/52 is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's SM6T datasheet (Doc. #88385, Rev. 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SM6T39CAHE3/52 suitable for under-hood and body-control module deployments.
What is the clamping voltage of SM6T39CAHE3/52 under a 10/1000 μs surge?
The clamping voltage of SM6T39CAHE3/52 is 53.9 V at 11.1 A for a 10/1000 μs waveform, as specified in the Electrical Characteristics table. This value represents the maximum voltage seen across the device during standardized surge testing and directly determines the protection level provided to downstream components.
Does SM6T39CAHE3/52 require a heatsink for 5.0 W continuous power dissipation?
No, SM6T39CAHE3/52 does not require an external heatsink for its 5.0 W power dissipation rating, which is specified at TA = 50 °C on infinite heatsink conditions. In typical PCB layouts with 0.2" × 0.2" copper pads per terminal, SM6T39CAHE3/52 relies on board-level thermal conduction-not discrete heatsinks-for thermal management.
How does the SMB (DO-214AA) package of SM6T39CAHE3/52 compare to SMA in size and thermal performance?
The SMB package of SM6T39CAHE3/52 measures 3.94 mm × 2.20 mm × 1.52 mm, smaller than SMA (4.57 mm × 2.79 mm × 2.30 mm), enabling higher board density. Thermally, SM6T39CAHE3/52 achieves RθJA = 100 °C/W versus ~150 °C/W for SMA variants-providing superior power handling per unit area and faster heat dissipation into the PCB.
SM6T39CAHE3/52 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:
- -
- Bidirectional Channels:
- 1
- 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)
SM6T39CAHE3/52 FAQ
1.How can I place an order for SM6T39CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T39CAHE3/52 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 SM6T39CAHE3/52 reliable?
The price and inventory of SM6T39CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T39CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T39CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T39CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T39CAHE3/52?
SM6T39CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T39CAHE3/52 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 SM6T39CAHE3/52?
For technical support, including SM6T39CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T39CAHE3/52 requirements.
6.How does Aetrix verify that SM6T39CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T39CAHE3/52 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 SM6T39CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T39CAHE3/52?
All SM6T39CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T39CAHE3/52, 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 SM6T39CAHE3/52 part is unused and in its original packaging.
Return procedure for SM6T39CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T39CAHE3/52 Tags
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