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Vishay General Semiconductor - Diodes Division SM6T33AHE3_A/H
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- Part No.:
- SM6T33AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33AHE3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,498
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Product details
Overview
SM6T33AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 33 V breakdown voltage (VBR = 31.4–34.7 V at 1.0 mA), 600 W peak pulse power (10/1000 μs), 45.7 V maximum clamping voltage at 13.1 A, and AEC-Q101 qualified for automotive use. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in engine control units and ADAS modules.
For engineers reviewing the SM6T33AHE3_A/H datasheet, SM6T33AHE3_A/H pinout, SM6T33AHE3_A/H application, or SM6T33AHE3_A/H equivalent, key selection criteria include unidirectional polarity, 28.2 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, 100 °C/W junction-to-ambient thermal resistance, and RoHS-compliant, halogen-free construction with matte tin leads.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR to limit transient energy. Its glass-passivated junction ensures stable breakdown behavior and low leakage under DC bias.
Designed for surface-mount automated assembly on PCBs with 5.0 mm × 5.0 mm copper pads per terminal, it meets MSL Level 1 (260 °C peak reflow) and delivers 13.1 A peak pulse current (IPPM) at 45.7 V clamping while maintaining 150 °C max junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1.0 mA - defines precise clamping onset threshold for overvoltage protection |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 45.7 V at 13.1 A (10/1000 μs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient power handling capability without failure under standardized waveform |
| IFSM | 100 A - surge current rating for 10 ms half-sine wave, critical for load-dump immunity |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance indicating required PCB copper area for safe power dissipation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or common return path; forms current path during reverse-biased clamping |
| Cathode | Protected line input | Connected to signal/power line being safeguarded; voltage referenced to anode during transient |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR tolerance and low long-term drift under thermal cycling and humidity |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST testing per stress requirements |
| 600 W peak pulse power (10/1000 μs) | Provides robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (< 1 ns rise time), improving clamping response |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking, reducing manufacturing complexity and cost |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Sensor Signal Line |
|---|---|
Use Scenario: Protects 12 V supply rail in engine control units from load dump and alternator transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and LDO/regulator input. Use Value: Limits voltage to ≤45.7 V during 13.1 A surge, preventing damage to downstream 33 V-rated regulators and microcontrollers. | Use Scenario: Shields LVDS or analog video signal lines from ESD and cable discharge events in surround-view camera systems. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on differential pair, referenced to chassis ground. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) to <50 V within nanoseconds, preserving signal integrity and ADC accuracy. |
| Body Control Module (BCM) CAN Transceiver Protection | Automotive Infotainment Display Interface |
Use Scenario: Safeguards CANH/CANL pins of transceivers against inductive kickback from window motor drivers and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS on each bus line, cathode to CANH/CANL, anode to ground. Use Value: Withstands repetitive 100 A surges (per ISO 7637-2 Pulse 5a) without degradation, ensuring CAN bus uptime. | Use Scenario: Guards MIPI DSI or eDP data lanes connecting head unit to TFT display against hot-plug transients and board-level ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector, cathode to signal, anode to ground. Use Value: Delivers 45.7 V clamping at 13.1 A while adding <0.5 pF parasitic capacitance, avoiding signal edge distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5B | Same VBR range (31.4–34.7 V), but SMA package (higher RθJA = 140 °C/W), 400 W PPPM | Limited to lower-power consumer/industrial boards; not AEC-Q101 qualified | Select when cost-sensitive non-automotive designs require footprint compatibility with SMA footprints |
| 1.5SMC33A | Same electrical specs, but larger SMC (DO-214AB) package (RθJA = 60 °C/W), 1500 W PPPM | Suitable for high-energy industrial surge zones (e.g., motor drives), not optimized for dense automotive PCBs | Choose when higher surge margin and thermal headroom are needed, accepting larger board area |
Compared with SMAJ33A-E3/5B and 1.5SMC33A, SM6T33AHE3_A/H uniquely balances AEC-Q101 compliance, SMB footprint density, and 600 W surge capacity-making it optimal for space-constrained automotive ECUs where qualification and thermal performance are jointly critical.
Availability
SM6T33AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, engine control units, and ADAS sensor interfaces requiring stable component supply across production lifecycles.
Supply support for SM6T33AHE3_A/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 automotive-grade qualification.
The SM6T Series is designed specifically for robust transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-inductance SMB packaging, and precise clamping performance for safety-critical electronic control units.
FAQ
What is the breakdown voltage tolerance of SM6T33AHE3_A/H?
The SM6T33AHE3_A/H has a specified breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1.0 mA test current, representing ±5% tolerance around the nominal 33 V rating. This tight tolerance ensures predictable clamping behavior in automotive power rails and signal lines where voltage margins are constrained. The SM6T33AHE3_A/H maintains this specification across its full operating temperature range of –65 °C to +150 °C.
Is SM6T33AHE3_A/H suitable for bidirectional transient protection?
No, SM6T33AHE3_A/H is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SM6T33CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities. Using SM6T33AHE3_A/H in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
Does SM6T33AHE3_A/H meet automotive qualification standards?
Yes, SM6T33AHE3_A/H is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's SM6T series datasheet (Doc. #88385, Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-ensuring reliability for under-hood and cabin automotive applications such as ECUs, body controllers, and sensor modules.
What is the maximum clamping voltage of SM6T33AHE3_A/H under surge conditions?
The SM6T33AHE3_A/H has a maximum clamping voltage (VC) of 45.7 V at 13.1 A peak pulse current with a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during standardized surge events. It is measured under defined thermal conditions (25 °C ambient, mounted on 5.0 mm × 5.0 mm copper pads) and is critical for verifying that downstream components remain within their absolute maximum voltage ratings.
How does the SMB package of SM6T33AHE3_A/H affect PCB layout?
The SMB (DO-214AA) package of SM6T33AHE3_A/H requires minimum pad dimensions of 0.086" × 0.060" (2.18 mm × 1.52 mm) per terminal and recommends 5.0 mm × 5.0 mm copper areas for thermal management. Its low profile (0.030" height) enables placement beneath connectors or in tight spaces, while the matte tin finish ensures compatibility with lead-free reflow profiles. Proper pad layout directly impacts the SM6T33AHE3_A/H's ability to sustain 600 W pulses without thermal runaway.
SM6T33AHE3_A/H 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:
- 1
- Bidirectional Channels:
- -
- 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)
SM6T33AHE3_A/H FAQ
1.How can I place an order for SM6T33AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33AHE3_A/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 SM6T33AHE3_A/H reliable?
The price and inventory of SM6T33AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T33AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T33AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33AHE3_A/H?
SM6T33AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33AHE3_A/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 SM6T33AHE3_A/H?
For technical support, including SM6T33AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33AHE3_A/H requirements.
6.How does Aetrix verify that SM6T33AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T33AHE3_A/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 SM6T33AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T33AHE3_A/H?
All SM6T33AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33AHE3_A/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 SM6T33AHE3_A/H part is unused and in its original packaging.
Return procedure for SM6T33AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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