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Vishay General Semiconductor - Diodes Division SM6T36AHE3/52
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- Part No.:
- SM6T36AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36AHE3/52.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,451
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Product details
Overview
SM6T36AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 36 V breakdown voltage (VBR = 34.2–37.8 V at 1.0 mA), 49.9 V clamping voltage at 12.0 A peak pulse current (10/1000 μs), and 600 W peak pulse power. It provides robust ESD and surge protection for automotive sensor signal lines.
For engineers reviewing the SM6T36AHE3/52 datasheet, SM6T36AHE3/52 pinout, SM6T36AHE3/52 application, or SM6T36AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low-inductance SMB package, and compliance with IEC 61000-4-2/4-5 for automotive-grade transient immunity.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at 30.8 V stand-off).
Designed for high-reliability automotive applications, SM6T36AHE3/52 features MSL Level 1 moisture sensitivity, matte tin-plated leads compliant with J-STD-002, and thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1.0 mA - defines precise clamping onset window for 36 V nominal systems |
| VWM | 30.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 49.9 V at 12.0 A (10/1000 μs) - limits transient voltage seen by protected IC to safe level |
| PPPM | 600 W - sustains high-energy transients like ISO 7637-2 Pulse 1/2a without failure |
| TJ max | +150 °C - enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and space-constrained PCBs |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
SMB (DO-214AA) package with cathode band marking; two-terminal device with anode and cathode leads. Matte tin-plated terminals ensure solderability per J-STD-002 and whisker resistance per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient conduction path during overvoltage | Connects to protected line; conducts reverse current when VREV > VBR, shunting energy to ground |
| Anode | Reference node / return path | Typically tied to system ground; completes clamping loop during surge events |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands automotive load-dump and inductive switching surges without degradation |
| AEC-Q101 qualification | Validated reliability for automotive ECUs, ADAS sensors, and body control modules |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream MOSFETs or interface ICs during clamping |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow without moisture-related popcorning |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity |
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 ISO 16750-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp reverse-polarity and surge events. Use Value: Limits transient voltage to ≤49.9 V, preserving integrity of 3.3 V/5 V interface ICs and preventing latch-up in microcontrollers. | Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring faults and inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Standoff protector on input terminal blocks, absorbing repetitive 600 W pulses without parameter drift. Use Value: Maintains <1.0 μA leakage at 30.8 V, ensuring clean logic-level detection while surviving >1000 surge events per MIL-STD-883H Method 3015. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters exposed to lightning-induced surges on mains-connected outputs. IC Role / Device Role / Timing Role: Fast-response clamping diode across DC output rails to protect downstream DC-DC converters and USB PD controllers. Use Value: Achieves 49.9 V clamping within <1 ns, limiting overshoot to levels compatible with 5 V tolerant I/O pins. | Use Scenario: Surge protection on Ethernet PHY side of PoE-powered devices subjected to IEC 61000-4-5 10/700 μs line-to-ground surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part applied where polarity is controlled (e.g., DC bias rail protection). Use Value: Delivers 600 W pulse handling with RθJA = 100 °C/W, enabling compact layout without heatsinking in space-limited SFP+ modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/52 | Same VBR range (34.2–37.8 V) but lower PPPM = 400 W; SMA package (DO-214AC), larger footprint | Not AEC-Q101 qualified; suitable for commercial-grade industrial use only | Select when cost sensitivity outweighs automotive qualification and 600 W headroom is unnecessary |
| 1.5SMC36A | Same electrical specs but SMC (DO-214AB) package; higher RθJA = 120 °C/W; no AEC-Q101 listing | Larger board area required; not validated for automotive temperature cycling or humidity testing | Choose for legacy designs using SMC footprints where re-layout is impractical |
Compared with SMAJ36A-E3/52 and 1.5SMC36A, SM6T36AHE3/52 delivers certified automotive reliability in a smaller SMB footprint with superior thermal performance (RθJA = 100 °C/W) and full 600 W surge margin-critical for next-generation ADAS sensor nodes.
Availability
SM6T36AHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and telecom line protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SM6T36AHE3/52 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, and protection devices with emphasis on reliability and automotive-grade validation.
The SM6T Series was engineered specifically for high-volume automotive and industrial transient suppression, balancing low clamping voltage, AEC-Q101 compliance, and automated assembly compatibility in the SMB package.
FAQ
What is the clamping voltage of SM6T36AHE3/52 and how is it measured?
The clamping voltage of SM6T36AHE3/52 is 49.9 V, measured at 12.0 A peak pulse current with a 10/1000 μs waveform per IEC 61000-4-5. This value reflects the maximum voltage imposed on the protected circuit during a standardized surge event and is guaranteed across the full operating temperature range. The SM6T36AHE3/52 achieves this clamping performance due to its optimized silicon junction design and low dynamic impedance.
Is SM6T36AHE3/52 suitable for automotive applications?
Yes, SM6T36AHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3". It undergoes rigorous stress testing including high-temperature operating life, temperature cycling, and ESD verification. The SM6T36AHE3/52 is commonly deployed in engine control units, ADAS camera modules, and body electronics where ISO 16750-2 and ISO 7637-2 compliance is mandatory.
What does the "HE3" suffix indicate in SM6T36AHE3/52?
"HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. It distinguishes SM6T36AHE3/52 from commercial-grade variants (e.g., "E3") and confirms full automotive reliability validation. The SM6T36AHE3/52 also meets JESD 201 Class 2 whisker resistance requirements.
How does SM6T36AHE3/52 differ from bidirectional TVS diodes like SM6T36CA?
SM6T36AHE3/52 is unidirectional and features a cathode band marking; it conducts only in reverse bias above VBR. In contrast, SM6T36CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Use SM6T36AHE3/52 where circuit polarity is fixed (e.g., DC power rails); choose SM6T36CA for AC-coupled or floating signal lines like data buses.
What is the thermal resistance of SM6T36AHE3/52 and how does it affect layout?
SM6T36AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes minimum recommended pad layout per Vishay spec; reducing pad size increases thermal resistance and derates power handling. For sustained surge duty, maintain specified copper area to ensure SM6T36AHE3/52 stays within its 150 °C TJ limit.
SM6T36AHE3/52 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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
SM6T36AHE3/52 FAQ
1.How can I place an order for SM6T36AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36AHE3/52 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 SM6T36AHE3/52 reliable?
The price and inventory of SM6T36AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T36AHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T36AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36AHE3/52?
SM6T36AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36AHE3/52 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 SM6T36AHE3/52?
For technical support, including SM6T36AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36AHE3/52 requirements.
6.How does Aetrix verify that SM6T36AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T36AHE3/52 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 SM6T36AHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T36AHE3/52?
All SM6T36AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36AHE3/52, 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 SM6T36AHE3/52 part is unused and in its original packaging.
Return procedure for SM6T36AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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