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Vishay General Semiconductor - Diodes Division SM6T33AHM3_B/I
- Part No.:
- SM6T33AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33AHM3_B/I.pdf
- Description:
- 600W,33V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,766
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Product details
Overview
SM6T33AHM3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 33 V breakdown voltage (VBR = 31.4–34.7 V), 45.7 V maximum clamping voltage at 13.1 A (10/1000 μs), 600 W peak pulse power, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T33AHM3_B/I datasheet, SM6T33AHM3_B/I pinout, SM6T33AHM3_B/I application, or SM6T33AHM3_B/I equivalent, key selection criteria include unidirectional polarity, 28.2 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, thermal resistance RθJA = 100 °C/W, and halogen-free RoHS-compliant construction per JESD 201 Class 2 whisker test.
Technical Context
The SM6T33AHM3_B/I operates as a unidirectional clamping device with glass passivated junction, optimized for fast response to ESD and surge events. Its 10/1000 μs waveform rating delivers 600 W peak pulse power, and it meets MSL Level 1 with 260 °C reflow peak temperature tolerance.
Designed for surface-mount automated placement, it uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. The cathode band denotes polarity, and its SMB package enables low-inductance protection on PCBs with 0.2" × 0.2" copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V - ensures reliable triggering above 28.2 V operating voltage without false conduction |
| VWM | 28.2 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 45.7 V @ 13.1 A - clamps transient energy within safe IC/MOSFET voltage limits during 10/1000 μs surges |
| PPPM | 600 W - handles high-energy transients from inductive switching or lightning-induced surges |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial enclosures |
| RθJA | 100 °C/W - defines thermal derating behavior on standard 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Receives surge current during overvoltage events; connects to protected line |
| Anode (unbanded end) | Reference return path | Connects to ground or lower-potential rail to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR and low parameter drift across temperature and lifetime |
| 600 W peak pulse power (10/1000 μs) | Protects against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges |
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS sensor interfaces |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time) |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and chassis ground. Use Value: Limits voltage to ≤45.7 V during 13.1 A surges, preventing damage to downstream regulators and microcontrollers in SM6T33AHM3_B/I-equipped modules. | Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Point-of-entry transient suppressor on 4–20 mA or 0–5 V output lines. Use Value: Clamps sub-100 ns ESD pulses to <46 V while maintaining <1.0 μA leakage at 28.2 V, preserving signal integrity in SM6T33AHM3_B/I-protected sensor nodes. |
| Consumer USB Power Delivery | Telecom DC Feeder Protection |
Use Scenario: Safeguarding USB-C PD controller ICs and port multiplexers from hot-plug surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBUS line upstream of buck converter. Use Value: Activates at 31.4 V and clamps to 45.7 V within nanoseconds, enabling robust compliance with USB PD 3.1 surge immunity requirements using SM6T33AHM3_B/I. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Secondary-level TVS on DC input stage before DC-DC isolation. Use Value: Withstands repeated 600 W transients without degradation, supporting long-term reliability in outdoor telecom deployments where SM6T33AHM3_B/I is specified. |
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 SMB package, 33 V VBR, but only commercial-grade (not AEC-Q101 qualified); RθJA = 110 °C/W | Lacks automotive qualification; suitable for consumer/industrial, not safety-critical vehicle systems | Select SMAJ33A-E3/5B only when AEC-Q101 is not required and thermal margin allows higher RθJA |
| SMCJ33A-HM3 | Higher 1500 W PPPM, larger SMC (DO-214AB) package; same VBR/VC specs | Requires PCB layout change; used where surge energy exceeds 600 W (e.g., heavy industrial mains coupling) | Choose SMCJ33A-HM3 only when system-level testing confirms >600 W surge exposure and board space permits SMC footprint |
Compared with SMAJ33A-E3/5B and SMCJ33A-HM3, the SM6T33AHM3_B/I uniquely balances AEC-Q101 qualification, SMB footprint, and 600 W capability-making it optimal for space-constrained automotive modules requiring validated reliability without overspec'ing package size or power rating.
Availability
SM6T33AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom DC power protection requiring stable component supply and full traceability.
Supply support for SM6T33AHM3_B/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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SM6T Series is engineered for robust transient suppression in harsh environments, targeting automotive power distribution, industrial control I/O, and communication infrastructure where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the exact breakdown voltage range for SM6T33AHM3_B/I?
The SM6T33AHM3_B/I has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1.0 mA test current, measured per JEDEC standards. This range ensures consistent clamping behavior across production lots and supports design margining for 28.2 V nominal systems. The specification is verified per Vishay Document Number 88385, Revision 09-Jan-2024.
Is SM6T33AHM3_B/I suitable for automotive applications?
Yes, SM6T33AHM3_B/I is AEC-Q101 qualified and designated with the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for under-hood and body electronics use, with operating junction temperature up to +150 °C and MSL Level 1 reflow compatibility. The qualification applies directly to the SM6T33AHM3_B/I part number.
What does the "B/I" suffix mean in SM6T33AHM3_B/I?
The "B/I" suffix in SM6T33AHM3_B/I indicates packaging configuration: "B" denotes revision code B per Vishay's internal documentation, and "I" specifies 13-inch diameter plastic tape and reel delivery mode with 3200 units per reel. This matches the ordering information table in Document 88385, confirming full traceability and standard logistics handling for SM6T33AHM3_B/I.
How does SM6T33AHM3_B/I compare to bidirectional TVS diodes?
SM6T33AHM3_B/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rails). Unlike bidirectional variants (e.g., SM6T33CA), it conducts only in reverse bias and requires correct cathode orientation. Its VBR and VC are specified for one polarity, offering tighter leakage control (1.0 μA at VWM) than equivalent bidirectional parts, which is critical in SM6T33AHM3_B/I-based power monitoring circuits.
What is the maximum clamping voltage of SM6T33AHM3_B/I under surge conditions?
The SM6T33AHM3_B/I has a maximum clamping voltage (VC) of 45.7 V at 13.1 A peak pulse current using the industry-standard 10/1000 μs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay Document 88385 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events involving SM6T33AHM3_B/I.
SM6T33AHM3_B/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:
- Active
- 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:
- 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)
SM6T33AHM3_B/I FAQ
1.How can I place an order for SM6T33AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33AHM3_B/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 SM6T33AHM3_B/I reliable?
The price and inventory of SM6T33AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T33AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T33AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33AHM3_B/I?
SM6T33AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33AHM3_B/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 SM6T33AHM3_B/I?
For technical support, including SM6T33AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33AHM3_B/I requirements.
6.How does Aetrix verify that SM6T33AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T33AHM3_B/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 SM6T33AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T33AHM3_B/I?
All SM6T33AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33AHM3_B/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 SM6T33AHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T33AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T33AHM3_B/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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