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Vishay General Semiconductor - Diodes Division SM6T36CAHM3/I
- Part No.:
- SM6T36CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36CAHM3/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
SM6T36CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 36 V standoff voltage (VWM), 49.9 V max clamping voltage at 12 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, industrial I/O interfaces, and power supply rails.
For engineers reviewing the SM6T36CAHM3/I datasheet, SM6T36CAHM3/I pinout, SM6T36CAHM3/I application, or SM6T36CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (1.39), and SMB footprint compatibility with high-volume SMT assembly.
Technical Context
The SM6T36CAHM3/I operates as a voltage-clamped bidirectional protector, leveraging an avalanche breakdown mechanism to limit transient overvoltages across both polarities. Its 36 V stand-off voltage ensures stable operation under normal bias while allowing fast response (<1 ns) to transients exceeding VBR (34.2–37.8 V).
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and features glass-passivated junctions, low inductance layout, and MSL Level 1 moisture sensitivity-enabling reflow soldering at 260 °C peak without popcorn failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 34.2 V / 37.8 V - Breakdown occurs within this range at 1 mA test current, ensuring predictable turn-on |
| VC @ IPPM | 49.9 V @ 12 A - Clamps 10/1000 μs surges to ≤49.9 V, limiting downstream voltage stress |
| PPPM | 600 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements (HTOL, TC, HAST, etc.) |
| RoHS & Halogen-Free | Compliant - Meets JEDEC J-STD-609A Class 1 halogen-free definition and EU RoHS Directive |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Cathode/anode terminals are symmetrical; both leads serve as interchangeable transient conduction paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient conduction path (negative polarity) | Carries surge current during negative transients; electrically identical to cathode in bidirectional operation |
| Cathode | Transient conduction path (positive polarity) | Carries surge current during positive transients; electrically identical to anode in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR min/max and VC performance for ± polarity transients-eliminates need for dual-device placement |
| 600 W peak pulse power (10/1000 μs) | Withstands automotive load-dump and inductive-switching surges without degradation |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive electronics including engine control units, ADAS sensors, and body controllers |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping-critical for protecting 3.3 V/5 V logic and analog front-ends |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM material declarations (e.g., GMW3172, Ford WSS-M99P9999-A1) and global environmental regulations |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., temperature, pressure) from ISO 16750-2 load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before reaching ASIC or MCU input pins. Use Value: Maintains signal integrity by clamping transients to ≤49.9 V while preserving <1 μA leakage at 36 V-preventing false triggers and latch-up in safety-critical systems. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges and ground-bounce events. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V DC input channels, mounted adjacent to terminal block to intercept energy before optocoupler or level-shifter stages. Use Value: Delivers 600 W pulse handling with 12 A peak current capacity-meeting IEC 61000-4-5 Level 3 (2 kV line-earth) without derating or parallel devices. |
| Power Supply Rail Clamp | Telecom Line Interface Protection |
Use Scenario: Secondary overvoltage protection on 36 V intermediate bus rails in telecom rectifiers and PoE injectors. IC Role / Device Role / Timing Role: Standby clamping device activated only during fault conditions (e.g., regulator failure, hot-swap transients), co-located with bulk capacitors. Use Value: 36 V VWM aligns precisely with nominal rail voltage-enabling stable operation during normal regulation while responding within nanoseconds to overvoltage faults. | Use Scenario: Protecting Ethernet PHY interfaces and DSL line drivers from lightning-induced surges and AC power cross-talk. IC Role / Device Role / Timing Role: Common-mode TVS pair placed across differential pairs (e.g., TX+/TX−, RX+/RX−) to suppress asymmetric and symmetric transients. Use Value: Symmetrical bidirectional behavior ensures equal clamping on both signal polarities-preserving differential signaling integrity and minimizing common-mode distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | 400 W PPPM rating, SMA package (smaller thermal mass), higher RθJA (150 °C/W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin at 125 °C ambient |
| SMCJ36CA | 1500 W PPPM rating, SMC package (larger footprint), same VWM/VC specs, higher IPPM (33.5 A) | Supports higher-level IEC 61000-4-5 testing and repeated surge endurance in harsh industrial settings | Choose for mission-critical infrastructure where single-event robustness and long-term reliability outweigh PCB area cost |
Compared with SMAJ36CA and SMCJ36CA, the SM6T36CAHM3/I delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, and SMB footprint-making it the preferred choice for volume automotive and industrial designs requiring validated reliability without overspec'ing package size or cost.
Availability
SM6T36CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, halogen-free compliance, and AEC-Q101 traceability.
Supply support for SM6T36CAHM3/I 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 high-reliability, automotive-qualified, and industry-standard solutions.
The SM6T Series is designed specifically for surface-mount transient voltage suppression in automotive, industrial, and telecom applications-delivering consistent clamping performance, AEC-Q101 validation, and standardized SMB packaging for automated manufacturing.
FAQ
What is the clamping voltage of SM6T36CAHM3/I at its rated peak pulse current?
The SM6T36CAHM3/I has a maximum clamping voltage (VC) of 49.9 V when subjected to a 10/1000 μs waveform at 12 A peak pulse current (IPPM). This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88385, Rev. 09-Jan-2024) and reflects worst-case clamping performance under defined surge conditions. The SM6T36CAHM3/I maintains this clamping level across its full operating temperature range.
Is SM6T36CAHM3/I qualified for automotive applications?
Yes, the SM6T36CAHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and explicit listing in Vishay's automotive-grade ordering codes. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST) per AEC-Q101 Rev D. The SM6T36CAHM3/I is approved for use in engine control units, body electronics, and ADAS sensor modules.
What does the "CA" suffix indicate in SM6T36CAHM3/I?
The "CA" suffix in SM6T36CAHM3/I denotes a bidirectional configuration-meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T36AHM3/I), the SM6T36CAHM3/I has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
What is the thermal resistance of SM6T36CAHM3/I from junction to ambient?
The SM6T36CAHM3/I 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, as specified in the Vishay SM6T Series datasheet. This value assumes standard PCB layout per recommended pad dimensions; actual RθJA will improve with enhanced copper pour or thermal vias. The SM6T36CAHM3/I also features RθJL = 20 °C/W (junction-to-lead).
How does SM6T36CAHM3/I differ from SM6T36AHM3/I?
The SM6T36CAHM3/I is bidirectional (CA), while SM6T36AHM3/I is unidirectional (A). Their VWM (36 V), VBR (34.2–37.8 V), and VC (49.9 V @ 12 A) are identical, but the unidirectional version requires correct polarity orientation (cathode band marked) and conducts forward surge only in one direction. The SM6T36CAHM3/I eliminates polarity concerns and supports symmetrical surge suppression-critical for AC-coupled or differential signal lines.
SM6T36CAHM3/I 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):
- 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 (SMB)
SM6T36CAHM3/I FAQ
1.How can I place an order for SM6T36CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36CAHM3/I 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 SM6T36CAHM3/I reliable?
The price and inventory of SM6T36CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T36CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM6T36CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36CAHM3/I?
SM6T36CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36CAHM3/I 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 SM6T36CAHM3/I?
For technical support, including SM6T36CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36CAHM3/I requirements.
6.How does Aetrix verify that SM6T36CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T36CAHM3/I 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 SM6T36CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM6T36CAHM3/I?
All SM6T36CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36CAHM3/I, 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 SM6T36CAHM3/I part is unused and in its original packaging.
Return procedure for SM6T36CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T36CAHM3/I Tags
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