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Vishay General Semiconductor - Diodes Division SMBG33A-E3/5B
- Part No.:
- SMBG33A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33A-E3/5B.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,338
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Product details
Overview
SMBG33A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and 11.3 A peak pulse current (IPPM). It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SMBG33A-E3/5B datasheet, SMBG33A-E3/5B pinout, SMBG33A-E3/5B application, or SMBG33A-E3/5B equivalent, key selection criteria include clamping voltage (53.3 V at IPPM), low leakage (<1.0 µA at VWM), AEC-Q101 qualification, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable surge response. Its 100 °C/W junction-to-ambient thermal resistance and 20 °C/W junction-to-lead resistance support reliable operation up to 150 °C junction temperature under transient stress.
The device delivers fast response time and low incremental surge resistance to limit overvoltage within nanoseconds during 10/1000 µs surges. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive-grade reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Ensures predictable turn-on threshold across production lot |
| VC @ IPPM | 53.3 V - Clamped voltage during 600 W transient, limiting downstream IC stress |
| IPPM | 11.3 A - Peak surge current capability with 10/1000 µs waveform |
| ID @ VWM | <1.0 µA - Minimal leakage ensures no signal integrity impact in high-impedance circuits |
| TJ max | +150 °C - Enables use in under-hood automotive modules without derating |
| Package | SMBG (DO-215AA) - Low-profile SMT footprint compatible with standard reflow profiles |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to circuit ground or lower-potential node in unidirectional protection configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line; conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients common in automotive load-dump and inductive switch-off events |
| AEC-Q101 qualified | Validated for automotive electronics including engine control, ADAS sensors, and body modules |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow processes without moisture sensitivity concerns |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| Low profile SMBG package | Reduces board space vs. SMA/SMB while maintaining robust thermal path via copper pad layout |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect position sensors in engine bay modules exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches sensitive analog front-end or communication ICs. Use Value: Limits clamped voltage to 53.3 V, keeping protected ICs within absolute maximum ratings during 100 V/50 ms load dump events. | Use Scenario: Safeguarding microcontroller GPIOs and gate drivers connected to relay coils or solenoid actuators in PLC I/O modules. IC Role / Device Role / Timing Role: Fast-response surge suppression on 24 V DC control lines subject to inductive kickback. Use Value: Sub-100 ns response and 11.3 A IPPM capacity prevent latch-up or permanent damage to 3.3 V/5 V logic interfaces. |
| Consumer Power Adapter Outputs | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage protection on 12 V/19 V DC outputs of laptop adapters and USB-C PD chargers. IC Role / Device Role / Timing Role: Standoff-rated clamping device placed between output rail and ground to absorb ESD and surge events. Use Value: 33 V VWM allows safe operation above nominal output while 53.3 V VC prevents downstream regulator overvoltage failure. | Use Scenario: Primary protection on Ethernet PHY power rails and auxiliary bias lines in PoE-powered switches and base stations. IC Role / Device Role / Timing Role: Unidirectional transient suppressor on 3.3 V/5 V supply inputs feeding high-speed transceivers. Use Value: <1.0 µA leakage preserves low-power sleep mode current budget; AEC-Q101 qualification supports extended field life in telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/5B | Same VWM (33 V), but lower PPPM (600 W vs. SMBJ series' 600 W), identical SMB package; VC = 53.3 V matches exactly | No functional difference in clamping performance; SMBJ33A-E3/5B uses legacy SMB (DO-214AA) package with slightly larger footprint | Select SMBG33A-E3/5B when board space is constrained and DO-215AA's smaller outline is required |
| SMCJ33A-E3/5B | Higher PPPM (1500 W), same VWM/VC, but larger SMC (DO-214AB) package; RθJA = 35 °C/W vs. SMBG's 100 °C/W | Used where higher single-event energy absorption is needed, e.g., primary-side AC input protection | Choose SMBG33A-E3/5B for secondary-side, space-constrained, automotive-grade signal-line protection |
Compared with SMBJ33A-E3/5B and SMCJ33A-E3/5B, the SMBG33A-E3/5B offers identical electrical clamping performance in a smaller DO-215AA footprint with AEC-Q101 qualification-making it optimal for dense, automotive-qualified PCB layouts where thermal dissipation requirements are moderate.
Availability
SMBG33A-E3/5B is available at Aetrix Electronics and suitable for automotive sensor units, industrial motor drive inputs, and consumer power adapter outputs requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant packaging.
Supply support for SMBG33A-E3/5B 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, precision, and automotive qualification.
The SMBG series is designed specifically for high-reliability transient suppression in space-constrained automotive and industrial applications, combining AEC-Q101 validation with optimized thermal and surge performance in the DO-215AA package.
FAQ
What is the clamping voltage of SMBG33A-E3/5B at its rated peak pulse current?
The SMBG33A-E3/5B has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current (IPPM) of 11.3 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures predictable overvoltage limiting for downstream ICs in the SMBG33A-E3/5B protection circuit.
Is SMBG33A-E3/5B suitable for automotive applications?
Yes, SMBG33A-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor modules, and body electronics. Its construction-glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C junction temperature-meets stringent automotive environmental and reliability requirements specified in the SMBG33A-E3/5B datasheet.
What does the "E3/5B" suffix indicate in SMBG33A-E3/5B?
The "E3" denotes RoHS-compliant, industrial-grade termination with matte tin plating; "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format ensures compatibility with high-speed pick-and-place equipment and supports large-volume SMT manufacturing for the SMBG33A-E3/5B.
How does SMBG33A-E3/5B differ from bidirectional TVS diodes like SMBG33CA?
SMBG33A-E3/5B is unidirectional and features a cathode band for polarity identification, enabling asymmetric clamping only in reverse bias. In contrast, SMBG33CA is bidirectional with no polarity marking and symmetric clamping in both directions. The SMBG33A-E3/5B is selected when protection is needed on grounded-signal lines or DC rails, not AC-coupled or differential buses.
What is the thermal resistance of SMBG33A-E3/5B, and how does it affect layout design?
SMBG33A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must follow the recommended pad dimensions and avoid excessive trace length-critical for consistent thermal performance in the SMBG33A-E3/5B application.
SMBG33A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG33A-E3/5B FAQ
1.How can I place an order for SMBG33A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33A-E3/5B 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 SMBG33A-E3/5B reliable?
The price and inventory of SMBG33A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG33A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG33A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33A-E3/5B?
SMBG33A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33A-E3/5B 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 SMBG33A-E3/5B?
For technical support, including SMBG33A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33A-E3/5B requirements.
6.How does Aetrix verify that SMBG33A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG33A-E3/5B 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 SMBG33A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG33A-E3/5B?
All SMBG33A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33A-E3/5B, 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 SMBG33A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG33A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG33A-E3/5B Tags
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