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Vishay General Semiconductor - Diodes Division SM6T33CAHE3_B/H
- Part No.:
- SM6T33CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33CAHE3_B/H.pdf
- Description:
- 600W,33V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,562
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Product details
Overview
SM6T33CAHE3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode 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), and clamping voltage of 45.7 V at 13.1 A. It protects automotive sensor signal lines and MOSFET gates against ESD and inductive switching transients.
For engineers reviewing the SM6T33CAHE3_B/H datasheet, SM6T33CAHE3_B/H pinout, SM6T33CAHE3_B/H application, or SM6T33CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low inductance design, 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, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 28.2 V).
The device delivers 600 W peak pulse power under standardized 10/1000 μs waveform conditions, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, supporting reliable operation up to 150 °C junction temperature in automotive-grade applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 28.2 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 45.7 V at 13.1 A - clamped voltage during 600 W transient, limiting stress on downstream ICs |
| PPPM | 600 W (10/1000 μs) - peak surge energy handling capacity for automotive load-dump and ISO 7637-2 pulses |
| TJ max | +150 °C - enables use in under-hood automotive environments without derating |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with IPC-7351B standard, 0.220" × 0.130" body |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥ 8 kV |
Pinout & Package
SM6T33CAHE3_B/H uses an SMB (DO-214AA) plastic package with two terminals and no polarity marking - consistent with bidirectional functionality. The case conforms to UL 94 V-0 flammability rating and features matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either direction) | Accepts surge current regardless of polarity; symmetrical conduction path with cathode |
| Cathode | Transient current exit point (either direction) | Completes bidirectional clamping loop; no band marking distinguishes it from anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, LIN), and ungrounded sensor outputs without polarity constraints |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump) in 12 V automotive systems |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, high-temperature operating life, and mechanical shock testing |
| Low inductance layout | Minimizes voltage overshoot during fast transients (e.g., ESD > 1 ns rise time) due to optimized chip-to-lead geometry |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; supports reflow up to 260 °C peak without moisture-related failure |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within <1 ns to transients exceeding 28.2 V. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC drivers by limiting excursion to ≤45.7 V at 13.1 A. | Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers from field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff protector across input terminal and common rail, conducting only when transient exceeds VWM. Use Value: Maintains signal integrity during 1 kV/500 A surge tests per IEC 61000-4-5 while preserving <1 μA leakage at nominal 24 V operation. |
| Automotive CAN Bus Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in body control modules against ESD (±8 kV contact) and coupled transients from adjacent high-current circuits. IC Role / Device Role / Timing Role: Symmetric TVS pair (one per line) referenced to chassis ground, leveraging bidirectional behavior for common-mode and differential-mode suppression. Use Value: Ensures bus remains functional after ±30 kV air discharge per ISO 10605, with clamping below transceiver's absolute maximum rating of 40 V. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Low-inductance shunt device across motor terminals or driver FET drains, diverting inductive kickback energy away from logic circuitry. Use Value: Eliminates need for snubber RC networks by absorbing 600 W pulses without degradation over 100,000+ cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VBR range and SMB package but rated for 400 W PPPM (vs. 600 W); lower IPPM (10.3 A vs. 13.1 A) | Limited to less severe transients (e.g., consumer-grade I/O); not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive robustness or higher surge margin |
| 1.5KE33CA | Higher power (1500 W), axial DO-201 package - larger footprint, higher inductance, incompatible with automated SMT | Used in legacy through-hole designs or high-energy industrial power supplies where board space allows | Choose only if PCB layout prohibits SMB or surge requirement exceeds 600 W |
Compared with SMAJ33CA and 1.5KE33CA, SM6T33CAHE3_B/H uniquely combines AEC-Q101 qualification, 600 W surge rating, SMB SMT compatibility, and bidirectional symmetry - making it optimal for new automotive and high-reliability industrial designs requiring zero-layout redesign.
Availability
SM6T33CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and CAN bus protection requiring stable component supply across multi-year production programs.
Supply support for SM6T33CAHE3_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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SM6T Series was developed specifically for surface-mount transient suppression in harsh environments, targeting AEC-Q101-compliant automotive electronics and industrial control systems demanding repeatable clamping performance.
FAQ
What does the "CA" suffix indicate in SM6T33CAHE3_B/H?
The "CA" suffix in SM6T33CAHE3_B/H denotes a bidirectional configuration, meaning the device clamps voltage transients equally in both polarities - unlike unidirectional variants (e.g., SM6T33A) that conduct only in reverse bias. This makes SM6T33CAHE3_B/H ideal for protecting AC-coupled or differential signal paths such as CAN bus lines or sensor bridges where polarity reversal may occur.
Is SM6T33CAHE3_B/H qualified for automotive applications?
Yes, SM6T33CAHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which explicitly denotes RoHS-compliant and AEC-Q101-qualified versions. It has passed stress tests including high-temperature operating life, temperature cycling, and ESD (HBM ≥ 8 kV), making it suitable for under-hood and body-control module deployments.
What is the maximum clamping voltage of SM6T33CAHE3_B/H during a transient event?
The maximum clamping voltage (VC) of SM6T33CAHE3_B/H is 45.7 V at 13.1 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value represents the upper limit of voltage seen by protected circuitry during a 600 W surge, ensuring downstream components like microcontrollers or transceivers remain within safe operating limits.
Does SM6T33CAHE3_B/H require a heatsink for normal operation?
No, SM6T33CAHE3_B/H does not require an external heatsink under typical transient conditions because its 600 W peak pulse rating applies to short-duration events (microseconds), not continuous dissipation. Its steady-state power dissipation is limited to 5.0 W, and thermal resistance (RθJA = 100 °C/W) is designed for operation on standard 0.2" × 0.2" copper pads without additional cooling.
How does the SMB (DO-214AA) package of SM6T33CAHE3_B/H compare to SMA (DO-214AC)?
The SMB package used by SM6T33CAHE3_B/H measures 0.220" × 0.130", larger than SMA (0.195" × 0.115"), providing higher power handling (600 W vs. typically 400 W for SMA equivalents) and improved thermal dissipation. Its wider body accommodates greater silicon area for surge current, and the leadframe design lowers inductance - critical for suppressing fast-rising ESD events.
SM6T33CAHE3_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)
SM6T33CAHE3_B/H FAQ
1.How can I place an order for SM6T33CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33CAHE3_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 SM6T33CAHE3_B/H reliable?
The price and inventory of SM6T33CAHE3_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 SM6T33CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T33CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33CAHE3_B/H?
SM6T33CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33CAHE3_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 SM6T33CAHE3_B/H?
For technical support, including SM6T33CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33CAHE3_B/H requirements.
6.How does Aetrix verify that SM6T33CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T33CAHE3_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 SM6T33CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T33CAHE3_B/H?
All SM6T33CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33CAHE3_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 SM6T33CAHE3_B/H part is unused and in its original packaging.
Return procedure for SM6T33CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T33CAHE3_B/H Tags
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