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Vishay General Semiconductor - Diodes Division SM6T33CAHE3/52
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- Part No.:
- SM6T33CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33CAHE3/52.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,615
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Product details
Overview
SM6T33CAHE3/52 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 at 1 mA), 600 W peak pulse power (10/1000 μs), and clamping to ≤59 V at 13.1 A. It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T33CAHE3/52 datasheet, SM6T33CAHE3/52 pinout, SM6T33CAHE3/52 application, or SM6T33CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low-inductance SMB package, and compliance with IEC 61000-4-2/4-4/4-5 surge immunity requirements.
Technical Context
The SM6T33CAHE3/52 operates as a symmetrical avalanche-clamping device with identical forward and reverse characteristics due to its bidirectional construction. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 28.2 V), while the low-inductance SMB package enables fast response (<1 ns) to transient events.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and supports high-reliability automotive applications via AEC-Q101 qualification. Thermal resistance is RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads), limiting steady-state dissipation to 5.0 W at 50 °C ambient.
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 1 mA - Ensures predictable avalanche initiation across production lot |
| VC @ IPPM | ≤59 V at 13.1 A (10/1000 μs) - Limits protected circuit voltage during worst-case surge |
| PPPM | 600 W - Sustains standardized lightning/surge pulses without failure |
| TJ max | +150 °C - Enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - Industry-standard footprint compatible with automated pick-and-place |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test requirements |
Pinout & Package
SM6T33CAHE3/52 uses an SMB (DO-214AA) surface-mount package with two terminals: no polarity marking for bidirectional operation. The case conforms to JEDEC DO-214AA outline, with cathode/anode symmetry enabling identical clamping in both directions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Either terminal serves as anode or cathode depending on transient polarity; no marking required |
| Terminal 2 | Anode/Cathode (symmetrical) | Electrically identical to Terminal 1; bidirectional conduction path with matched VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV line-to-line) surges without degradation |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage over temperature and life cycle |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., ESD >20 kV contact discharge) |
| MSL Level 1 rating | Supports single-reflow assembly without moisture sensitivity concerns |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and AC/HAST stress tests |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus lines and analog sensor inputs (e.g., pressure, temperature) in engine control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector entry point to shunt transients before reaching MCU or signal conditioner. Use Value: Clamps 30 A surge (10/1000 μs) to <59 V, preserving signal integrity and preventing latch-up in downstream ASICs. | Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input lines to clamp repetitive switching spikes up to 600 W peak. Use Value: Maintains <1 μA leakage at 28.2 V, eliminating false triggering in high-impedance optocoupler interfaces. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Surge protection on Ethernet PHY interface lines (e.g., RJ45 magnetics secondary side) subjected to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs to suppress common-mode transients without distorting signal waveform. Use Value: Symmetrical clamping ensures equal protection for both polarities, critical for full-duplex communication integrity. | Use Scenario: Input-stage transient suppression in USB-C PD adapters handling 20 V input rails subject to hot-plug and cable coupling events. IC Role / Device Role / Timing Role: Primary-side TVS between AC-DC rectifier output and primary controller supply rail. Use Value: Withstands 100 A IFSM (unidirectional equivalent) and maintains 150 °C TJ rating during repeated surge events. |
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 VWM/VBR/PPPM specs but SMA package (higher RθJA = 150 °C/W); not AEC-Q101 qualified | Limited to commercial-grade consumer/industrial use; unsuitable for automotive under-hood locations | Select when cost or legacy board layout prioritizes SMA footprint over thermal or automotive compliance |
| 1.5KE33CA | Through-hole DO-201 package; higher PPPM (1500 W) but slower response (>5 ns) and larger footprint | Better for high-energy surges where PCB space allows; incompatible with SMT-only assembly | Choose for legacy designs requiring through-hole mounting or where 1.5 kW surge margin justifies manual assembly |
Compared with SMAJ33CA and 1.5KE33CA, SM6T33CAHE3/52 uniquely combines AEC-Q101 qualification, SMB footprint, and 600 W surge capability-making it optimal for space-constrained automotive and industrial SMT systems requiring validated reliability.
Availability
SM6T33CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and telecom line interface circuits requiring stable component supply, AEC-Q101 compliance, and consistent SMB packaging.
Supply support for SM6T33CAHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability and automotive-grade solutions.
The SM6T Series is designed specifically for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and repeatable surge performance are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T33CAHE3/52?
The "CA" suffix in SM6T33CAHE3/52 denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both forward and reverse directions. This eliminates polarity concerns during PCB placement and ensures identical clamping behavior across differential or AC-coupled signal paths. Unlike unidirectional variants (e.g., SM6T33A), SM6T33CAHE3/52 has no cathode marking and is tested for VBR in both directions per the datasheet.
Is SM6T33CAHE3/52 suitable for automotive applications?
Yes, SM6T33CAHE3/52 is AEC-Q101 qualified, as confirmed by its HE3 suffix and Vishay's official documentation. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and accelerated humidity testing-to ensure reliability in automotive environments. Its 150 °C maximum junction temperature and MSL Level 1 rating further support under-hood deployment in ECUs and sensor modules.
What is the clamping voltage of SM6T33CAHE3/52 at rated peak pulse current?
The clamping voltage (VC) of SM6T33CAHE3/52 is guaranteed ≤59 V at 13.1 A peak pulse current using the standard 10/1000 μs waveform. This value is measured under defined test conditions (mounted on 5.0 mm × 5.0 mm copper pads) and represents the maximum voltage imposed on protected circuitry during a worst-case surge event, ensuring downstream ICs remain within safe operating limits.
How does the SMB package of SM6T33CAHE3/52 compare to SMA or SMC alternatives?
The SMB (DO-214AA) package of SM6T33CAHE3/52 offers lower thermal resistance (RθJA = 100 °C/W) than SMA (150 °C/W) and smaller footprint than SMC, while maintaining 600 W surge capability. Its low inductance improves high-speed transient response, and its MSL Level 1 rating supports lead-free reflow without baking. Compared to SMAJ33CA (SMA) or SMCJ33CA (SMC), SM6T33CAHE3/52 delivers better thermal performance in dense layouts without sacrificing surge margin.
What is the maximum reverse leakage current for SM6T33CAHE3/52 at its standoff voltage?
The maximum reverse leakage current (ID) for SM6T33CAHE3/52 is 1.0 μA at its standoff voltage (VWM) of 28.2 V, measured at 25 °C. This low leakage ensures minimal power loss and avoids false triggering in high-impedance circuits such as sensor bias networks or optocoupler inputs. Leakage remains well below 10 μA even at elevated temperatures up to 125 °C, supporting stable operation across industrial temperature ranges.
SM6T33CAHE3/52 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):
- 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)
SM6T33CAHE3/52 FAQ
1.How can I place an order for SM6T33CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33CAHE3/52 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 SM6T33CAHE3/52 reliable?
The price and inventory of SM6T33CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T33CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T33CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33CAHE3/52?
SM6T33CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33CAHE3/52 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 SM6T33CAHE3/52?
For technical support, including SM6T33CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33CAHE3/52 requirements.
6.How does Aetrix verify that SM6T33CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T33CAHE3/52 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 SM6T33CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T33CAHE3/52?
All SM6T33CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33CAHE3/52, 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 SM6T33CAHE3/52 part is unused and in its original packaging.
Return procedure for SM6T33CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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