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Vishay General Semiconductor - Diodes Division SM6T36CAHE3_B/I
- Part No.:
- SM6T36CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36CAHE3_B/I.pdf
- Description:
- 600W,36V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,701
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Product details
Overview
SM6T36CAHE3_B/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 clamping voltage at 12 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It features AEC-Q101 qualification, glass passivated junction, and low inductance for automotive-grade surge protection on signal lines and power rails.
For engineers reviewing the SM6T36CAHE3_B/I datasheet, SM6T36CAHE3_B/I pinout, SM6T36CAHE3_B/I application, or SM6T36CAHE3_B/I equivalent, key selection criteria include bidirectional clamping behavior, 150 °C max junction temperature, RoHS-compliant matte tin terminals, MSL Level 1 rating, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, delivering identical breakdown (34.2–37.8 V) and clamping performance regardless of polarity. Its low RθJA of 100 °C/W and RθJL of 20 °C/W support thermal reliability under repetitive transients when mounted per recommended pad layout.
The device uses a glass-passivated silicon junction to achieve stable leakage (<1.0 μA at VWM) and fast response to ESD and lightning-induced surges. It meets JESD201 Class 2 whisker resistance and is qualified to AEC-Q101 for automotive under-hood and infotainment applications.
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 - Breakdown occurs within this range at 1 mA test current, confirming bidirectional symmetry |
| VC @ IPPM | 49.9 V @ 12.0 A - Clamping voltage during 10/1000 μs surge limits downstream IC stress |
| PPPM | 600 W - Peak pulse power handling capability defines robustness against IEC 61000-4-5 surges |
| TJ max | +150 °C - Enables operation in high-temperature automotive environments without derating |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.220" body length and 0.060" lead pitch |
| Qualification | AEC-Q101 qualified - Validated for automotive use including temperature cycling, humidity, and mechanical shock |
Pinout & Package
SM6T36CAHE3_B/I is housed in an SMB (DO-214AA) surface-mount package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking; both terminals are functionally symmetric and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional clamping | Connects to protected line (e.g., CAN_H or LIN bus); no fixed polarity required |
| Cathode | Current exit point in forward bias; common terminal in bidirectional clamping | Connects to protected line (e.g., CAN_L or ground reference); electrically identical to anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN) without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events on 2 Ω source impedance without failure |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS modules over full temperature and lifetime cycles |
| MSL Level 1, 260 °C reflow | Supports standard lead-free SMT assembly without moisture sensitivity limitations or baking requirements |
| Glass passivated junction | Ensures stable leakage current (<1 μA) and long-term parameter stability under thermal and humidity stress |
Applications
| Automotive CAN Bus Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs from load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential lines to limit surge energy before transceiver input. Use Value: Maintains signal integrity by clamping to ≤49.9 V while absorbing up to 600 W, preventing transceiver latch-up or damage. | Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Symmetrical transient suppressor on bus lines to suppress ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Low clamping voltage ensures receiver input stays within common-mode range, avoiding data corruption during surge events. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level protection on USB 2.0 D+/D− lines after integrated ESD array, targeting higher-energy surges. IC Role / Device Role / Timing Role: High-power TVS providing backup clamping for multi-kV contact discharge events beyond IC-level ESD limits. Use Value: 49.9 V clamping prevents VDD rail coupling and maintains USB PHY functionality during 8/20 μs lightning surges. | Use Scenario: Primary surge protection on DSL line interface cards subjected to induced lightning surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Front-end bidirectional clamp limiting line-to-line and line-to-ground voltages before transformer and codec. Use Value: 600 W rating handles 10/1000 μs surges up to 4 kV, extending service life of telecom infrastructure equipment. |
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), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA) | Limited to lower-energy surges; unsuitable for IEC 61000-4-5 Level 4 | Select SMAJ36CA only if space-constrained and surge threat level is ≤2 kV. |
| SMCJ36CA | Same VWM, higher PPPM (1500 W), larger SMC package (DO-214AB), higher IPPM (41.7 A) | Overqualified for most PCB-level protection; requires larger layout area | Choose SMCJ36CA when protecting high-impedance inputs or where >600 W margin is mandated. |
Compared with SMAJ36CA and SMCJ36CA, SM6T36CAHE3_B/I delivers optimal balance of 600 W surge capacity, SMB footprint, AEC-Q101 qualification, and automotive-ready packaging-making it the preferred choice for cost-sensitive, space-limited automotive and industrial designs requiring validated reliability.
Availability
SM6T36CAHE3_B/I is available at Aetrix Electronics and suitable for automotive CAN bus protection, industrial RS-485 interfaces, and telecom DSL line surge suppression requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant manufacturing.
Supply support for SM6T36CAHE3_B/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, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM6T Series is designed specifically for board-level transient suppression in automotive, industrial, and communications systems-delivering high-power clamping in compact SMB packages with AEC-Q101 validation and consistent process control.
FAQ
What does the "CA" suffix indicate in SM6T36CAHE3_B/I?
The "CA" suffix in SM6T36CAHE3_B/I denotes a bidirectional configuration, meaning the device clamps voltage symmetrically in both polarities. This enables protection of AC-coupled or differential signal lines-such as CAN, RS-485, or telecom lines-without requiring polarity-aware placement. Unlike unidirectional variants (e.g., SM6T36A), SM6T36CAHE3_B/I has no cathode band marking and exhibits identical VBR and VC characteristics in either direction.
Is SM6T36CAHE3_B/I suitable for automotive applications?
Yes, SM6T36CAHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It undergoes rigorous testing for temperature cycling, humidity, mechanical shock, and solderability per AEC standards. Its 150 °C maximum junction temperature, MSL Level 1 rating, and matte tin-plated leads make SM6T36CAHE3_B/I appropriate for engine control units, body controllers, and ADAS modules where reliability under harsh conditions is mandatory.
What is the clamping voltage of SM6T36CAHE3_B/I at rated surge current?
The clamping voltage (VC) of SM6T36CAHE3_B/I is 49.9 V when subjected to a 10/1000 μs waveform at 12.0 A peak pulse current (IPPM). This value is measured per Figure 1 in the Vishay datasheet (Document Number 88385) and represents the maximum voltage seen across the device during standardized surge events-critical for ensuring downstream ICs remain within safe operating limits during transient exposure.
How does the SMB (DO-214AA) package of SM6T36CAHE3_B/I compare to SMA or SMC packages?
The SMB package of SM6T36CAHE3_B/I offers a middle-ground footprint: larger than SMA (DO-214AC) for better thermal dissipation and surge handling, but smaller than SMC (DO-214AB) for space-constrained layouts. With RθJA = 100 °C/W and RθJL = 20 °C/W, SMB provides superior thermal performance versus SMA while maintaining compatibility with standard 0.2" × 0.2" copper pads-making SM6T36CAHE3_B/I ideal for high-reliability applications needing more than 400 W but less than 1500 W surge capacity.
Does SM6T36CAHE3_B/I require special PCB layout considerations?
Yes-optimal performance of SM6T36CAHE3_B/I requires adherence to Vishay's recommended mounting pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, with minimum trace width and direct connection to ground/power planes. Short, wide traces minimize inductance and preserve low clamping voltage. Avoid thermal relief on pads to ensure effective heat transfer, especially in automotive applications where ambient temperatures exceed 85 °C.
SM6T36CAHE3_B/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:
- 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:
- 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)
SM6T36CAHE3_B/I FAQ
1.How can I place an order for SM6T36CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36CAHE3_B/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 SM6T36CAHE3_B/I reliable?
The price and inventory of SM6T36CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T36CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T36CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36CAHE3_B/I?
SM6T36CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36CAHE3_B/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 SM6T36CAHE3_B/I?
For technical support, including SM6T36CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36CAHE3_B/I requirements.
6.How does Aetrix verify that SM6T36CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T36CAHE3_B/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 SM6T36CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T36CAHE3_B/I?
All SM6T36CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36CAHE3_B/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 SM6T36CAHE3_B/I part is unused and in its original packaging.
Return procedure for SM6T36CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T36CAHE3_B/I Tags
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