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Vishay General Semiconductor - Diodes Division SM6T33CAHM3_B/H
- Part No.:
- SM6T33CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33CAHM3_B/H.pdf
- Description:
- 600W,33V,5%,BIDIR, SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,610
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Product details
Overview
SM6T33CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, with 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 600 W peak pulse power (10/1000 μs), 45.7 V max clamping voltage at 13.1 A, and AEC-Q101 qualification for automotive use. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients.
For engineers reviewing the SM6T33CAHM3_B/H datasheet, SM6T33CAHM3_B/H pinout, SM6T33CAHM3_B/H application, or SM6T33CAHM3_B/H equivalent, key selection factors include bidirectional polarity, clamping performance under 10/1000 μs surge, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and SMB package compatibility with automated SMT placement.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, delivering consistent clamping behavior across positive and negative transients. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 28.2 V), while the low-inductance SMB package supports fast response to sub-microsecond ESD and lightning-induced surges.
Designed for robustness in harsh environments, SM6T33CAHM3_B/H meets J-STD-020 MSL Level 1 (peak reflow 260 °C), features matte tin-plated leads compliant with JESD 22-B102, and is halogen-free and RoHS-compliant per Vishay HM3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise voltage threshold where clamping initiates in either polarity |
| VWM | 28.2 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 45.7 V at 13.1 A (10/1000 μs) - actual clamped voltage during worst-case surge, limiting downstream stress |
| PPPM | 600 W - peak transient power handling capability under standardized 10/1000 μs waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional terminal pair | No functional distinction - identical clamping behavior in both directions; terminals interchangeable in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients such as ISO 7637-2 Pulse 5a without thermal runaway |
| Glass passivated junction | Ensures stable VBR tolerance and low parameter drift over temperature and lifetime |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without popcorn or delamination risk |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring zero-failure field reliability |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts up to 5 kHz repetition) |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load dump and alternator ripple in door module ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping device placed at connector interface to shunt transients before reaching sensitive logic. Use Value: Maintains signal integrity below 45.7 V clamp level during 13.1 A surges, preventing latch-up or permanent damage to 3.3 V/5 V ICs. | Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 4–20 mA current loop outputs. Use Value: Limits induced voltage spikes to ≤45.7 V, preserving 12-bit DAC accuracy and avoiding ADC saturation during 600 W surge events. |
| Automotive Camera Power Input | Consumer Appliance Motor Drive Interface |
Use Scenario: Input-side protection for 12 V camera modules subjected to ISO 16750-2 jump-start and battery reversal transients. IC Role / Device Role / Timing Role: First-line defense on main power rail upstream of DC/DC converter and image sensor. Use Value: Withstands 100 A IFSM-equivalent surge energy and maintains <1 μA leakage at 28.2 V, ensuring low quiescent current in always-on systems. | Use Scenario: Shielding MCU-controlled H-bridge gate drivers from back-EMF during brushed DC motor commutation. IC Role / Device Role / Timing Role: Clamp placed across motor terminals and/or driver supply rails. Use Value: Fast response (<1 ns) and low clamping voltage reduce MOSFET VDS stress, extending FET lifetime in white goods and power tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA-E3/5B | Same VBR range (31.4–34.7 V), lower PPPM = 400 W, SMA package (larger footprint, higher RθJA) | Not AEC-Q101 qualified; suitable for commercial industrial but not automotive front-end protection | Select when cost sensitivity outweighs automotive qualification and 600 W headroom is unnecessary |
| 1.5KE33CA | Through-hole DO-204AC package, PPPM = 1500 W, same VBR, no AEC-Q101 or MSL rating | Requires wave soldering; incompatible with high-density SMT layouts and automated assembly | Choose only for legacy through-hole designs needing higher peak power and no reflow constraints |
Compared with SMAJ33CA-E3/5B and 1.5KE33CA, SM6T33CAHM3_B/H uniquely combines AEC-Q101 qualification, 600 W surge capability, SMB footprint, and MSL Level 1 compliance-making it the only option qualified for next-generation automotive SMT power rail protection without layout or process compromise.
Availability
SM6T33CAHM3_B/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer appliance motor drives, and camera power input circuits requiring stable component supply across long production lifecycles.
Supply support for SM6T33CAHM3_B/H 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 and application-specific performance.
The SM6T Series was engineered specifically for high-reliability transient suppression in space-constrained, high-volume SMT applications-including automotive subsystems where AEC-Q101 compliance and thermal stability are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T33CAHM3_B/H?
The "CA" suffix in SM6T33CAHM3_B/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T33A), SM6T33CAHM3_B/H has no cathode/anode polarity marking and clamps identically in either direction-critical for AC-coupled or floating signal line protection.
Is SM6T33CAHM3_B/H suitable for automotive applications?
Yes, SM6T33CAHM3_B/H is AEC-Q101 qualified (indicated by the HM3 suffix), making it suitable for automotive applications including body control modules, camera power inputs, and sensor interfaces. It undergoes rigorous stress testing for temperature cycling, high-temperature reverse bias, and ESD, and is rated for operation from –65 °C to +150 °C junction temperature.
What is the maximum clamping voltage of SM6T33CAHM3_B/H under surge conditions?
The maximum clamping voltage of SM6T33CAHM3_B/H is 45.7 V at 13.1 A under the standardized 10/1000 μs double-exponential surge waveform. This value represents the peak voltage seen across the device during worst-case transient events and directly determines the protection margin for downstream 3.3 V or 5 V ICs connected to the same rail.
How does the HM3 suffix differ from E3 or M3 in SM6T33CAHM3_B/H?
The HM3 suffix in SM6T33CAHM3_B/H indicates halogen-free, RoHS-compliant construction *and* AEC-Q101 qualification-distinguishing it from E3 (RoHS-compliant commercial grade) and M3 (halogen-free RoHS-compliant commercial grade). HM3 parts are tested to automotive reliability standards and approved for use in safety-critical vehicle subsystems.
What PCB pad layout is recommended for SM6T33CAHM3_B/H?
Vishay specifies a minimum mounting pad layout of 5.0 mm × 5.0 mm copper area per terminal for SM6T33CAHM3_B/H to achieve rated 600 W peak pulse power and thermal performance. The SMB (DO-214AA) outline requires 0.220" × 0.155" (5.59 mm × 3.94 mm) board space, with 0.086" (2.18 mm) minimum pad width per end.
SM6T33CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- 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)
SM6T33CAHM3_B/H FAQ
1.How can I place an order for SM6T33CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33CAHM3_B/H 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 SM6T33CAHM3_B/H reliable?
The price and inventory of SM6T33CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T33CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T33CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33CAHM3_B/H?
SM6T33CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33CAHM3_B/H 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 SM6T33CAHM3_B/H?
For technical support, including SM6T33CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33CAHM3_B/H requirements.
6.How does Aetrix verify that SM6T33CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T33CAHM3_B/H 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 SM6T33CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T33CAHM3_B/H?
All SM6T33CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33CAHM3_B/H, 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 SM6T33CAHM3_B/H part is unused and in its original packaging.
Return procedure for SM6T33CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T33CAHM3_B/H Tags
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