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Vishay General Semiconductor - Diodes Division SM6T39CAHE3_B/H
- Part No.:
- SM6T39CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T39CAHE3_B/H.pdf
- Description:
- 600W,39V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,628
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Product details
Overview
SM6T39CAHE3_B/H 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 and industrial I/O interfaces.
For engineers reviewing the SM6T39CAHE3_B/H datasheet, SM6T39CAHE3_B/H pinout, SM6T39CAHE3_B/H application, or SM6T39CAHE3_B/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.38), TJ max. of +150 °C, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
The SM6T39CAHE3_B/H operates as a bidirectional voltage-clamping device, leveraging a symmetric avalanche junction to suppress transients in both polarities without polarity marking. Its 10/1000 μs waveform rating reflects standardized lightning-surge immunity testing per IEC 61000-4-5.
Designed for surface-mount use in space-constrained PCBs, it features glass-passivated chip construction, MSL Level 1 moisture sensitivity, and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Thermal resistance is RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise voltage threshold where avalanche conduction begins in either direction |
| 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 seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability under standardized surge waveform |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and high-ambient industrial settings |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction in layout |
| Case / Body | Thermal and mechanical interface | Exposed metal slug not electrically connected; provides thermal path to PCB copper pad (0.2" × 0.2") |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 12 V automotive buses |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers and microcontrollers |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow without baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector entry point to shunt transients before reaching signal conditioning amplifier. Use Value: Maintains signal integrity under ±100 V/50 ms load dump events while surviving 150 °C ambient and vibration per AEC-Q200. | Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Fast-response transient suppressor located between field-side connector and optocoupler input stage. Use Value: Limits voltage to ≤54 V during 4 kV EFT (IEC 61000-4-4) ensuring optocoupler CMTI remains intact and system uptime is preserved. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceiver pins in base station remote units subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary front-end TVS on differential bus lines, coordinated with secondary GDT or polymer PTC. Use Value: Clamps 10/1000 μs surges to <54 V within 1 ns, preserving transceiver data integrity and avoiding latch-up. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Low-inductance TVS mounted adjacent to motor driver MOSFET source/drain nodes. Use Value: Absorbs 600 W spikes without degradation across >100,000 motor cycles, meeting UL 60730 Class B surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39CA | Same VBR range (37.1–41.0 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for automotive load dump per ISO 7637-2 Pulse 5a | Select when board space is critical and surge energy is constrained to <400 W (e.g., USB port protection) |
| 1.5KE39CA | Higher PPPM = 1500 W, axial DO-201 package; slower response due to higher parasitic inductance | Not SMT-compatible; requires through-hole assembly and larger PCB area | Choose only for legacy through-hole designs or where >1 kW surge margin is mandatory and layout allows axial components |
Compared with SMAJ39CA and 1.5KE39CA, SM6T39CAHE3_B/H delivers optimal balance of AEC-Q101 compliance, 600 W surge capacity, SMB footprint, and low-inductance SMT performance - making it the preferred choice for new automotive and industrial SMT designs requiring validated reliability.
Availability
SM6T39CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer appliance motor controls requiring stable component supply and AEC-Q101 traceability.
Supply support for SM6T39CAHE3_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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
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 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T39CAHE3_B/H?
The "CA" suffix in SM6T39CAHE3_B/H denotes a bidirectional configuration - meaning the device clamps transient voltages equally in both polarities. Unlike unidirectional variants (e.g., SM6T39A), it has no cathode band marking and is used where AC-coupled or polarity-agnostic protection is required, such as on differential signal lines or AC power inputs. This is confirmed in Vishay's SM6T datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SM6T39CAHE3_B/H qualified for automotive applications?
Yes, SM6T39CAHE3_B/H is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JS-001. The device is explicitly intended for automotive use cases such as sensor protection and infotainment interfaces, and its thermal rating (TJ max. = +150 °C) supports under-hood deployment. Documentation is verified in Vishay document 88385, page 1.
What is the clamping voltage of SM6T39CAHE3_B/H at rated peak pulse current?
The clamping voltage (VC) of SM6T39CAHE3_B/H is 53.9 V at 11.1 A, measured under the standardized 10/1000 μs double-exponential surge waveform. This value represents the maximum voltage imposed on the protected circuit during a full-rated transient event. It is specified in the "ELECTRICAL CHARACTERISTICS" table of Vishay's SM6T datasheet (document 88385, page 2) for the SM6T39CA variant.
Does SM6T39CAHE3_B/H require a heatsink for normal operation?
No, SM6T39CAHE3_B/H does not require an external heatsink for transient suppression duty, as its 600 W rating applies to non-repetitive pulses. For continuous power dissipation, its 5.0 W rating assumes mounting on 0.2" × 0.2" copper pads per terminal (per datasheet note). Thermal resistance is RθJA = 100 °C/W (typ.), so steady-state power must remain well below 5 W - which is typical for TVS devices operating only during rare surge events. Continuous DC bias is not recommended.
How does the HE3 suffix differ from E3 or M3 in SM6T39CAHE3_B/H?
The "HE3" suffix in SM6T39CAHE3_B/H indicates RoHS-compliant construction *and* AEC-Q101 qualification, whereas "E3" denotes RoHS-compliant commercial grade only, and "M3" adds halogen-free compliance. The "H" prefix in HE3 explicitly signals automotive qualification - confirmed in Vishay's ordering information table (page 2 of doc 88385), where "Base P/NHE3_X" is defined as "RoHS-compliant and AEC-Q101 qualified". This makes SM6T39CAHE3_B/H suitable for Tier 1 automotive supply chains requiring full qualification documentation.
SM6T39CAHE3_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:
- -
- 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:
- 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)
SM6T39CAHE3_B/H FAQ
1.How can I place an order for SM6T39CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T39CAHE3_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 SM6T39CAHE3_B/H reliable?
The price and inventory of SM6T39CAHE3_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 SM6T39CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T39CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T39CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T39CAHE3_B/H?
SM6T39CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T39CAHE3_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 SM6T39CAHE3_B/H?
For technical support, including SM6T39CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T39CAHE3_B/H requirements.
6.How does Aetrix verify that SM6T39CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T39CAHE3_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 SM6T39CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T39CAHE3_B/H?
All SM6T39CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T39CAHE3_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 SM6T39CAHE3_B/H part is unused and in its original packaging.
Return procedure for SM6T39CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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