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Vishay General Semiconductor - Diodes Division SM6T36A-E3/52
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- Part No.:
- SM6T36A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36A-E3/52.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,945
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Product details
Overview
SM6T36A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 34.2 V minimum breakdown voltage (VBR), 30.8 V stand-off voltage (VWM), 49.9 V maximum clamping voltage (VC) at 12.0 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform - used for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the SM6T36A-E3/52 datasheet, SM6T36A-E3/52 pinout, SM6T36A-E3/52 application, or SM6T36A-E3/52 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, thermal resistance (RθJA = 100 °C/W), RoHS-compliant commercial-grade construction, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The SM6T36A-E3/52 operates as a unidirectional avalanche diode with glass-passivated junction, designed to clamp transient overvoltages before they damage downstream components. Its low-inductance SMB package and cathode-band polarity marking support high-speed response to fast-rising ESD or load-switching events.
It delivers stable clamping across -65 °C to +150 °C junction temperature range, with derated peak pulse power above 25 °C ambient and compliance to J-STD-020 MSL Level 1 (260 °C reflow peak). The device is not bidirectional - no "CA" suffix - and requires correct anode/cathode orientation during layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - maximum reverse working voltage before leakage exceeds 1 μA; defines safe operating ceiling for continuous DC bias. |
| VBR (min/max) | 34.2 V / 37.8 V at 1.0 mA test current - ensures reliable avalanche initiation within tight tolerance band for predictable turn-on behavior. |
| VC @ IPPM | 49.9 V at 12.0 A (10/1000 μs) - limits voltage seen by protected circuit during worst-case surge, enabling robust IC-level protection. |
| PPPM | 600 W - peak transient power handling capability under standardized 10/1000 μs waveform; validates suitability for automotive load-dump immunity. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; informs board-level thermal design for sustained reliability. |
| TJ max | +150 °C - maximum allowable junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant, commercial grade (E3 suffix), MSL Level 1 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VWM exceeded - polarity must match schematic symbol. |
| Anode | Reference return path | Typically tied to system ground or low-impedance return plane; completes clamping loop with minimal trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against ISO 7637-2 Pulse 1/2a/5a transients without derating in typical automotive harness configurations. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per JESD22-A101. |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns rise time), critical for safeguarding high-speed digital interfaces. |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without preconditioning, reducing manufacturing complexity and moisture-related failures. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V power rails feeding ECUs, body controllers, and lighting modules from load-dump surges up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between supply rail and chassis ground. Use Value: Limits transient voltage to ≤49.9 V during 12 A pulses, preventing latch-up or gate oxide damage in downstream regulators and microcontrollers. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–5 V) of pressure/temperature sensors from ESD and cable-induced noise. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor mounted directly at connector entry point. Use Value: Clamps fast transients while maintaining signal integrity - leakage <1 μA at 30.8 V ensures minimal offset error in precision measurement paths. |
| Consumer Power Adapter Inputs | MOSFET Gate Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across bridge rectifier output or bulk capacitor terminals. Use Value: Withstands repetitive 600 W pulses without degradation, extending adapter lifetime in regions with unstable grid conditions. |
Use Scenario: Preventing gate oxide rupture in N-channel power MOSFETs driven by microcontrollers in motor drives and power supplies. IC Role / Device Role / Timing Role: Clamp diode connected between gate and source to absorb Miller-induced voltage spikes. Use Value: Fast avalanche response (ns-scale) and 30.8 V VWM ensure gate remains below absolute maximum rating during switching transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A | Same VWM (30.8 V), lower PPPM (400 W), SMA package (higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load-dump where 600 W margin is required. | Select SM6T36A-E3/52 when higher surge robustness and better thermal performance on standard pads are needed. |
| 1.5SMC36A | Same VWM/VC, higher PPPM (1500 W), larger SMC package (DO-214AB), RθJA = 60 °C/W | Over-specified for space-constrained designs; requires larger PCB footprint and different reflow profile. | Choose SM6T36A-E3/52 for compact SMB layouts where 600 W meets system-level test requirements (e.g., ISO 16750-2). |
Compared with SMAJ36A and 1.5SMC36A, the SM6T36A-E3/52 offers optimal balance of surge rating, thermal performance, and miniaturized SMB footprint - making it preferred for high-density automotive and industrial PCBs requiring validated 600 W clamping without layout redesign.
Availability
SM6T36A-E3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, consumer power adapter inputs, and MOSFET gate protection requiring stable component supply and full traceability.
Supply support for SM6T36A-E3/52 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, efficiency, and application-specific performance.
The SM6T Series was engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 readiness (via HE3 variants) are essential.
FAQ
What is the clamping voltage of SM6T36A-E3/52 under a 10/1000 μs surge?
The SM6T36A-E3/52 has a maximum clamping voltage (VC) of 49.9 V at 12.0 A peak pulse current using the 10/1000 μs waveform. This value is measured per Figure 1 in Vishay's 88385 datasheet and defines the upper voltage limit imposed on protected circuits during standardized surge events. It ensures downstream ICs remain within safe operating voltage margins.
Is SM6T36A-E3/52 RoHS-compliant and halogen-free?
Yes, SM6T36A-E3/52 carries the "E3" suffix, indicating it is RoHS-compliant and qualified to commercial grade standards per Vishay's ordering nomenclature. It is not halogen-free - that designation applies only to "M3" suffix variants. The E3 version uses matte tin-plated leads and meets JESD201 Class 2 whisker resistance requirements.
Can SM6T36A-E3/52 be used in bidirectional configurations?
No, SM6T36A-E3/52 is a unidirectional TVS diode. Bidirectional versions require the "CA" suffix (e.g., SM6T36CA). The SM6T36A-E3/52 features a cathode band marking and is intended for DC-biased lines where transient energy flows in one direction - such as positive supply rails referenced to ground.
What is the thermal resistance of SM6T36A-E3/52, and how does it affect layout?
The SM6T36A-E3/52 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 standard PCB copper area - reducing pad size increases thermal impedance and may cause premature thermal runaway during repetitive surges. Layout must follow Vishay's recommended mounting pad dimensions.
Does SM6T36A-E3/52 meet AEC-Q101 qualification?
No, SM6T36A-E3/52 is not AEC-Q101 qualified. That qualification applies only to variants with "HE3" or "HM3" suffixes (e.g., SM6T36AHE3_A). The E3/52 version is commercial-grade and intended for non-automotive applications unless explicitly validated by the end customer for specific use cases. Automotive designs should specify the HE3 variant.
SM6T36A-E3/52 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T36A-E3/52 FAQ
1.How can I place an order for SM6T36A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36A-E3/52 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 SM6T36A-E3/52 reliable?
The price and inventory of SM6T36A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T36A-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T36A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36A-E3/52?
SM6T36A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36A-E3/52 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 SM6T36A-E3/52?
For technical support, including SM6T36A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36A-E3/52 requirements.
6.How does Aetrix verify that SM6T36A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T36A-E3/52 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 SM6T36A-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T36A-E3/52?
All SM6T36A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36A-E3/52, 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 SM6T36A-E3/52 part is unused and in its original packaging.
Return procedure for SM6T36A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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