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Vishay General Semiconductor - Diodes Division SMBG33CAHE3/5B
- Part No.:
- SMBG33CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33CAHE3/5B.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,833
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Product details
Overview
SMBG33CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 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), <1.0 μA reverse leakage at VWM, and clamps to ≤53.3 V at 11.3 A peak pulse current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG33CAHE3/5B datasheet, SMBG33CAHE3/5B pinout, SMBG33CAHE3/5B application, or SMBG33CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 μA leakage at 33 V), but triggers into low-impedance conduction when transient voltage exceeds VBR (min 36.7 V), limiting downstream voltage to ≤53.3 V at rated IPPM. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns).
The SMBG33CAHE3/5B is rated for 600 W peak pulse power (10/1000 μs waveform, 0.01% duty cycle), derated linearly above 25 °C per Fig. 2, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W - requiring PCB pad design per recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper areas for full power handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| IPPM | 11.3 A - peak surge current supported at 10/1000 μs waveform without failure |
| VC @ IPPM | ≤53.3 V - maximum clamped voltage seen by protected circuit during rated surge |
| PPPM | 600 W - transient energy absorption capacity under standardized surge test condition |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and stress testing |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking; molded compound meets UL 94 V-0; matte tin-plated leads solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for positive and negative transients - no cathode band marking |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in CA-suffix devices; terminals interchangeable in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Low-profile SMBG package | 0.255" × 0.155" footprint (6.48 mm × 3.94 mm) supports high-density PCB layouts and automated pick-and-place |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at connector or IC input pins to clamp transients before they reach sensitive silicon. Use Value: Limits induced voltage to ≤53.3 V during 10/1000 μs surges, preserving signal integrity and preventing latch-up in AEC-Q100 qualified ICs. | Use Scenario: Safeguarding digital input/output channels on programmable logic controllers against field-wiring surges and ground-loop transients. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp on 24 V DC I/O lines, absorbing energy from inductive switching spikes up to 600 W. Use Value: Enables robust operation in factory environments with >100,000 surge cycles per device lifetime due to low incremental resistance and stable VBR. |
| Telecom Line Interface | Consumer Device USB/DisplayPort ESD |
Use Scenario: Transient suppression on RS-485/RS-422 differential data lines in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) referenced to chassis ground, leveraging bidirectional symmetry for balanced clamping. Use Value: Maintains signal fidelity with <10 pF junction capacitance at zero bias, avoiding data rate degradation up to 20 Mbps. | Use Scenario: Board-level ESD protection for USB 2.0, HDMI, or DisplayPort connectors in laptops and docking stations. IC Role / Device Role / Timing Role: First-line defense against IEC 61000-4-2 ±8 kV contact / ±15 kV air discharge events at external ports. Use Value: Responds in <1 ns to divert >15 A ESD current while holding clamped voltage below 55 V - within IC absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG33CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free BOM compliance is mandated | Choose SMBG33CAHE3/5B for standard RoHS + AEC-Q101; choose SMBG33CA-M3/5B only if halogen-free material requirement applies |
| SMCJ33CAHE3/5B | Same VWM/VBR/VC, but larger SMC (DO-214AB) package with 1500 W PPPM rating | Used where higher surge margin is needed (e.g., front-end power inputs), not drop-in due to larger footprint | Select SMBG33CAHE3/5B for space-constrained signal-line protection; use SMCJ33CAHE3/5B only when 1500 W capability and PCB area permit |
Compared with SMBG33CA-M3/5B, the SMBG33CAHE3/5B offers identical surge performance and automotive qualification but differs in material composition; versus SMCJ33CAHE3/5B, it trades 2.5× lower peak power for 40% smaller board area - critical for dense sensor node layouts.
Availability
SMBG33CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer port protection requiring stable component supply across extended production lifecycles.
Supply support for SMBG33CAHE3/5B 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific optimization.
The SMBG series targets high-reliability transient suppression in automotive, industrial, and communications systems - engineered for AEC-Q101 compliance, low clamping voltage, and repeatable surge endurance under real-world PCB thermal conditions.
FAQ
What is the breakdown voltage range for SMBG33CAHE3/5B?
The SMBG33CAHE3/5B has a minimum breakdown voltage (VBR) of 36.7 V and a maximum of 40.6 V at 1 mA test current, as specified in the Vishay datasheet document 88456. This range ensures consistent clamping behavior across production lots and defines the voltage threshold at which the SMBG33CAHE3/5B begins conducting significant surge current.
Is SMBG33CAHE3/5B suitable for automotive applications?
Yes, SMBG33CAHE3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its 150 °C maximum junction temperature, MSL Level 1 rating, and validation per JESD22-A114 stress tests confirm suitability for under-hood and cabin environments.
What is the clamping voltage of SMBG33CAHE3/5B at its rated peak pulse current?
At its rated peak pulse current (IPPM) of 11.3 A (10/1000 μs waveform), the SMBG33CAHE3/5B clamps to a maximum voltage of 53.3 V. This value is measured per standard test conditions and represents the highest voltage imposed on the protected circuit during a full-rated surge event.
Does SMBG33CAHE3/5B have polarity markings on the package?
No, SMBG33CAHE3/5B is a bidirectional TVS diode and carries no polarity marking - the SMBG (DO-215AA) package lacks a cathode band. Both terminals are functionally identical, allowing flexible PCB layout without orientation constraints for AC or differential signal protection.
What is the maximum reverse leakage current for SMBG33CAHE3/5B at its stand-off voltage?
At its 33 V stand-off voltage (VWM), the SMBG33CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C. This low leakage ensures minimal power loss and signal interference in always-on circuits such as automotive sensor bias networks.
SMBG33CAHE3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG33CAHE3/5B FAQ
1.How can I place an order for SMBG33CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33CAHE3/5B 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 SMBG33CAHE3/5B reliable?
The price and inventory of SMBG33CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG33CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG33CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33CAHE3/5B?
SMBG33CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33CAHE3/5B 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 SMBG33CAHE3/5B?
For technical support, including SMBG33CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33CAHE3/5B requirements.
6.How does Aetrix verify that SMBG33CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG33CAHE3/5B 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 SMBG33CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG33CAHE3/5B?
All SMBG33CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33CAHE3/5B, 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 SMBG33CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG33CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG33CAHE3/5B Tags
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