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Vishay General Semiconductor - Diodes Division SM6T33CAHE3_A/I
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- Part No.:
- SM6T33CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33CAHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,507
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Product details
Overview
SM6T33CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 33 V standoff voltage (VWM), 37.1–41.0 V breakdown (VBR), 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive electronics protection against inductive switching transients on signal lines and power rails.
For engineers reviewing the SM6T33CAHE3_A/I datasheet, SM6T33CAHE3_A/I pinout, SM6T33CAHE3_A/I application, or SM6T33CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage (VC = 59 V at IPPM), RoHS-compliant + AEC-Q101 qualification, and SMB package compatibility with automated SMT assembly.
Technical Context
The SM6T33CAHE3_A/I operates as a bidirectional TVS diode with symmetrical clamping in both polarities, enabling robust protection of differential or AC-coupled interfaces without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (ID ≤ 1.0 μA at VWM = 28.2 V).
Designed for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers 59 V clamping voltage at 13.1 A peak pulse current (10/1000 μs), with thermal resistance RθJA = 100 °C/W and maximum junction temperature of 150 °C under defined PCB pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 37.1 V / 41.0 V at IT = 1.0 mA - Confirmed breakdown threshold range for bidirectional conduction |
| VC @ IPPM | 59 V at 13.1 A (10/1000 μs) - Clamping voltage limiting protected circuit stress during surge events |
| PPPM | 600 W - Peak transient energy absorption capacity under standardized waveform |
| TJ max | +150 °C - Maximum allowable junction temperature supporting automotive under-hood use |
| Qualification | AEC-Q101 qualified - Validated reliability for automotive electronic control units and sensor modules |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | One terminal of symmetrical PN junction; accepts surge current in either direction |
| Cathode | Transient current exit point (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance clamp path to ground or reference rail |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients like load dump or inductive kick in 12 V automotive systems |
| Low clamping voltage (59 V) | Keeps downstream ICs and MOSFETs within safe operating area during 13.1 A surge events |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT reflow profiles without moisture-induced damage |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with low leakage (<1 μA at 28.2 V) |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS device clamping voltage excursions on sensor supply and signal lines to prevent latch-up or gate oxide damage. Use Value: Maintains sensor accuracy and longevity by limiting transient overvoltage to ≤59 V while surviving repeated 600 W surges. | Use Scenario: Safeguarding CANH/CANL differential pair in industrial automation nodes subject to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Symmetrical clamping element placed across bus lines to shunt common-mode transients without disrupting DC bias or signal integrity. Use Value: Preserves CAN FD communication reliability by clamping ±59 V spikes without adding capacitance that degrades edge rate. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Input-stage protection for USB-C PD adapters and AC/DC converters subjected to lightning-induced surges on primary-side rectifier outputs. IC Role / Device Role / Timing Role: Secondary-side TVS suppressing fast-rising transients before they reach controller ICs and optocouplers. Use Value: Prevents premature failure of PWM controllers and feedback circuits by limiting voltage to 59 V during 10/1000 μs surges up to 13.1 A. | Use Scenario: Front-end protection of Ethernet PHYs and DSL line drivers in telecom access equipment connected to outdoor copper lines. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between transformer secondary and PHY interface to absorb induced lightning surges. Use Value: Ensures compliance with GR-1089-CORE Level 3 surge immunity by clamping common-mode transients to ≤59 V without affecting 100 Ω differential impedance. |
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 | 400 W PPPM rating; higher clamping voltage (64.5 V); same SMB package and VWM | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 600 W margin |
| 1.5KE33CA | Through-hole DO-201 package; 1500 W PPPM; higher VC (53 V at 28.3 A) | Requires PCB redesign; suited for high-power front-end protection rather than board-level IC protection | Choose for legacy through-hole designs or where higher surge margin justifies larger footprint |
Compared with SMAJ33CA and 1.5KE33CA, the SM6T33CAHE3_A/I provides superior energy handling in surface-mount form with automotive-grade reliability-enabling compact, high-density layouts in safety-critical ECUs without sacrificing surge immunity.
Availability
SM6T33CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer power adapters, and telecom line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T33CAHE3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SM6T Series was developed to deliver high-power, low-clamp transient protection in compact surface-mount packages for automotive, industrial, and communications systems where space, thermal performance, and qualification rigor are critical.
FAQ
What is the clamping voltage of the SM6T33CAHE3_A/I under a 10/1000 μs surge?
The SM6T33CAHE3_A/I has a maximum clamping voltage (VC) of 59 V at 13.1 A peak pulse current under the standardized 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 transient events. The SM6T33CAHE3_A/I maintains this clamping performance across its specified operating temperature range and is validated for repeatable operation in automotive environments.
Is the SM6T33CAHE3_A/I suitable for automotive applications?
Yes, the SM6T33CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix and revision code "A/I". It meets stringent reliability requirements for engine control units, ADAS sensors, and body electronics, including thermal cycling, humidity testing, and mechanical shock validation. The SM6T33CAHE3_A/I also complies with MSL Level 1 and lead-free reflow standards required for modern automotive manufacturing.
What does the "CA" suffix indicate in SM6T33CAHE3_A/I?
The "CA" suffix in SM6T33CAHE3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SM6T33A), the SM6T33CAHE3_A/I has no cathode band marking and functions identically regardless of voltage polarity-making it ideal for protecting AC-coupled lines, differential buses like CAN or RS-485, and floating sensor outputs.
What is the standoff voltage (VWM) rating for the SM6T33CAHE3_A/I?
The SM6T33CAHE3_A/I has a maximum working peak reverse voltage (VWM) of 28.2 V, which is the highest continuous DC or RMS voltage the device can withstand without entering avalanche conduction. This rating ensures reliable operation in 24 V automotive systems and industrial 24 V control circuits, where normal operating voltages remain safely below the clamping threshold while allowing headroom for ripple and tolerance drift.
Does the SM6T33CAHE3_A/I require a heatsink for standard operation?
No, the SM6T33CAHE3_A/I is designed for operation without an external heatsink under typical PCB conditions-specifically when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in the Vishay datasheet. Its RθJA of 100 °C/W and 5.0 W steady-state power dissipation rating allow adequate thermal management in most surface-mount applications. However, sustained high-duty-cycle surges may require additional copper area or thermal vias to maintain TJ ≤ 150 °C.
SM6T33CAHE3_A/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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T33CAHE3_A/I FAQ
1.How can I place an order for SM6T33CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33CAHE3_A/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 SM6T33CAHE3_A/I reliable?
The price and inventory of SM6T33CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T33CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T33CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33CAHE3_A/I?
SM6T33CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33CAHE3_A/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 SM6T33CAHE3_A/I?
For technical support, including SM6T33CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33CAHE3_A/I requirements.
6.How does Aetrix verify that SM6T33CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T33CAHE3_A/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 SM6T33CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T33CAHE3_A/I?
All SM6T33CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33CAHE3_A/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 SM6T33CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM6T33CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T33CAHE3_A/I Tags
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