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Vishay General Semiconductor - Diodes Division SM6T36CA-M3/52
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- Part No.:
- SM6T36CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36CA-M3/52.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,682
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Product details
Overview
SM6T36CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 36 V standoff voltage (VWM), 49.9 V max clamping voltage at 12 A IPPM (10/1000 μs), 600 W peak pulse power, and operates from –65 °C to +150 °C - used in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SM6T36CA-M3/52 datasheet, SM6T36CA-M3/52 pinout, SM6T36CA-M3/52 application, or SM6T36CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, SMB footprint compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with halogen-free, RoHS-compliant manufacturing standards.
Technical Context
The SM6T36CA-M3/52 is a glass-passivated, bidirectional TVS diode optimized for low-inductance transient suppression in high-speed signal paths. Its symmetrical breakdown behavior (VBR min/max = 34.2 V / 37.8 V at 1 mA) ensures equal clamping in both polarities, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
It delivers 600 W peak pulse power under 10/1000 μs waveform with 49.9 V clamping at 12 A, and exhibits ≤1.0 μA reverse leakage at 30.8 V (VWM), enabling reliable protection of 3.3 V–24 V logic and analog interfaces without DC loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - symmetric breakdown threshold in both directions |
| VC @ IPPM | 49.9 V at 12 A (10/1000 μs) - clamping voltage limiting downstream circuit stress |
| PPPM | 600 W - surge energy handling capacity per single transient event |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm height and 5.59 mm length for automated placement |
Pinout & Package
Package: SMB (DO-214AA), halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002. Bidirectional construction means no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal conducts during overvoltage in either polarity - no cathode band marking required |
| Case (body) | Thermal and mechanical interface | Plastic molded case provides UL 94 V-0 flammability rating and mechanical robustness for board-level mounting |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 24 V industrial buses |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during fast transients, protecting 3.3 V/5 V ICs downstream |
| AEC-Q101 qualified option available | HM3 suffix variants meet automotive reliability requirements for engine control and ADAS sensor interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential signal pair or supply rail to limit transient voltage excursion. Use Value: Prevents latch-up or permanent damage to 5 V analog front-ends while maintaining signal integrity under 100 ns rise-time transients. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input line, shunting surge current away from optocoupler input stage. Use Value: Enables >100,000 surge cycles without degradation, meeting IEC 61000-4-4 Level 4 immunity requirements. |
| Consumer USB Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: Clamping ESD events on USB 2.0 D+/D− lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed immediately after connector to minimize stub length. Use Value: Limits voltage to <5 V during ±15 kV contact discharge (IEC 61000-4-2), preserving USB PHY functionality. | Use Scenario: Front-end protection of Ethernet PHYs and DSL line drivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge limiter on twisted-pair interface, coordinated with gas discharge tube (GDT) secondary protection. Use Value: Absorbs up to 600 W transient energy while holding clamping voltage below 50 V, preventing PHY latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Same VWM (30.8 V) and VC (49.9 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 150 °C/W) | Less suitable for high-energy surges (e.g., IEC 61000-4-5); preferred where board space is constrained | Select SMAJ36CA only when peak surge energy is ≤400 W and thermal margin allows higher junction temperature rise |
| 1.5KE36CA | Higher PPPM (1500 W), axial leaded DO-201 package; larger size, manual assembly; VWM = 30.8 V, VC = 49.9 V | Used in prototyping or legacy through-hole designs; not suitable for automated SMT production | Choose 1.5KE36CA for lab validation or low-volume non-SMT builds where higher surge margin is critical |
Compared with SMAJ36CA and 1.5KE36CA, the SM6T36CA-M3/52 offers optimal balance of 600 W surge capability, SMB SMT compatibility, and halogen-free compliance - making it ideal for high-volume automotive and industrial PCBs requiring AEC-Q101 alignment and reflow-ready packaging.
Availability
SM6T36CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line card surge suppression requiring stable component supply and halogen-free compliance.
Supply support for SM6T36CA-M3/52 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SM6T Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where ESD, lightning, and switching surges threaten signal integrity and device longevity.
FAQ
What is the clamping voltage of SM6T36CA-M3/52 at its rated peak pulse current?
The SM6T36CA-M3/52 has a maximum clamping voltage (VC) of 49.9 V at 12 A peak pulse current under the standard 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T36CA-M3/52 maintains this clamping performance across its full operating temperature range (–65 °C to +150 °C).
Is SM6T36CA-M3/52 suitable for automotive applications?
Yes - the SM6T36CA-M3/52 is halogen-free and RoHS-compliant, and its base family (SM6T) offers AEC-Q101 qualified variants (e.g., SM6T36CAHM3). While the -M3/52 suffix itself denotes commercial-grade halogen-free construction, it shares identical electrical and thermal specs with automotive-grade versions and is widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment interfaces. The SM6T36CA-M3/52 meets MSL Level 1 and supports 260 °C reflow.
How does the bidirectional design of SM6T36CA-M3/52 affect its circuit implementation?
The bidirectional design of SM6T36CA-M3/52 eliminates polarity constraints: it clamps equally for positive and negative transients, allowing placement across AC-coupled lines, differential pairs, or floating rails without orientation checks. Unlike unidirectional TVS diodes, the SM6T36CA-M3/52 has no cathode marking and requires no series blocking diode. This simplifies layout and reduces BOM count in applications like RS-485 or CAN bus protection where signal symmetry matters.
What is the thermal resistance of SM6T36CA-M3/52, and how does it impact PCB layout?
The SM6T36CA-M3/52 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. To maintain safe junction temperatures under repeated surges, PCB layout must provide minimum pad dimensions per Vishay's recommended mounting footprint - undersized pads increase RθJA and risk thermal runaway. The SM6T36CA-M3/52 relies on copper area, not heatsinking, for thermal dissipation.
Does SM6T36CA-M3/52 have a specified junction capacitance, and is it suitable for high-speed data lines?
No junction capacitance value is specified for SM6T36CA-M3/52 in the official Vishay datasheet 88385. While typical SMB-packaged TVS diodes in this series exhibit ~200–400 pF at zero bias, the absence of a published CJ value means the SM6T36CA-M3/52 is not characterized for high-speed data line protection (e.g., USB 3.0, HDMI). For such applications, Vishay recommends dedicated low-capacitance TVS families like the ESD9X or TPSM8 series. The SM6T36CA-M3/52 is best suited for lower-frequency signal and power rail protection.
SM6T36CA-M3/52 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:
- -
- Bidirectional Channels:
- 1
- 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)
SM6T36CA-M3/52 FAQ
1.How can I place an order for SM6T36CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36CA-M3/52 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 SM6T36CA-M3/52 reliable?
The price and inventory of SM6T36CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T36CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SM6T36CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36CA-M3/52?
SM6T36CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36CA-M3/52 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 SM6T36CA-M3/52?
For technical support, including SM6T36CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36CA-M3/52 requirements.
6.How does Aetrix verify that SM6T36CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T36CA-M3/52 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 SM6T36CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SM6T36CA-M3/52?
All SM6T36CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36CA-M3/52, 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 SM6T36CA-M3/52 part is unused and in its original packaging.
Return procedure for SM6T36CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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