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Vishay General Semiconductor - Diodes Division SMBG33CA-E3/5B
- Part No.:
- SMBG33CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33CA-E3/5B.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,919
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Product details
Overview
SMBG33CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or 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), and clamps to ≤53.3 V at 11.3 A peak pulse current - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SMBG33CA-E3/5B datasheet, SMBG33CA-E3/5B pinout, SMBG33CA-E3/5B application, or SMBG33CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.4), MSL Level 1 moisture sensitivity, 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: during ESD or lightning-induced surges, it avalanches symmetrically in both directions above its breakdown threshold, diverting transient energy to ground while limiting downstream voltage to ≤53.3 V. Its glass-passivated junction ensures stable leakage (<1.0 µA at 33 V) and fast response time (<1 ns).
Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" pads) and TJ(max) = +150 °C, enabling reliable operation in under-hood automotive environments. The SMBG33CA-E3/5B is RoHS-compliant, halogen-free (per M3 suffix logic), and qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - tight breakdown window ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | ≤53.3 V at 11.3 A - clamping voltage limits stress on protected ICs (e.g., CAN transceivers, ADC inputs) during 600 W transients. |
| PPPM | 600 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump and inductive switching events. |
| IPPM | 11.3 A - peak surge current capacity derived from PPPM/VC; validates robustness against IEC 61000-4-5 Level 3/4 threats. |
| TJ(max) | +150 °C - enables use in engine control units, motor drivers, and other high-temperature automotive locations. |
| AEC-Q101 | Qualified - verified for automotive applications including temperature cycling, HTRB, and ESD (HBM ≥8 kV). |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts when voltage exceeds +VBR. |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts when voltage exceeds –VBR; no band marking for bidirectional types. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity concerns. |
| 600 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment up to Level 4 (4 kV line-to-earth). |
| AEC-Q101 qualification | Validates reliability for automotive ECUs, ADAS sensors, and body electronics subject to extended temperature and vibration stress. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without baking; compatible with standard SMT assembly processes using 13" tape-and-reel (5B packaging). |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine compartments exposed to load-dump transients and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS diode placed between signal line and chassis ground, clamping transients within nanoseconds. Use Value: Limits voltage seen by downstream op-amp or ADC input to ≤53.3 V, preventing latch-up or permanent damage during 12 V/24 V system surges. | Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subjected to EFT bursts and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pair (A/B), referenced to local ground plane. Use Value: Maintains signal integrity by suppressing common-mode transients up to ±30 kV ESD (IEC 61000-4-2) without affecting DC bias or data rate. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Input protection for LIN bus transceivers and switch inputs in door modules, where inductive kickback from solenoids causes repetitive 100 V spikes. IC Role / Device Role / Timing Role: Low-capacitance (CJ < 200 pF at 0 V) bidirectional clamp on LIN line to GND. Use Value: Prevents false triggering and communication errors by clamping spikes to <55 V while adding <0.5 ns propagation delay. | Use Scenario: Overvoltage suppression on gate drive lines of BLDC motor inverters in washing machines, where MOSFET switching induces dV/dt coupling. IC Role / Device Role / Timing Role: Transient suppressor between high-side gate driver output and source, referenced to local power ground. Use Value: Absorbs 600 W energy from parasitic oscillations, protecting gate oxide from >20 V overshoot during hard switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same VWM (33 V), identical SMB (DO-214AA) package but 600 W rating at 10/1000 µs; slightly higher VC (53.3 V vs. 53.3 V - matched), lower thermal resistance (RθJA = 85 °C/W). | Preferred for space-constrained PCBs where DO-214AA footprint is already allocated; not AEC-Q101 qualified. | Select SMBJ33CA only if AEC-Q101 is not required and existing layout uses SMB instead of SMBG. |
| SMCJ33CA | Same VWM and bidirectional function, but larger SMC (DO-214AB) package with 1500 W rating; VC = 53.3 V at 28.3 A; RθJA = 50 °C/W. | Suitable for higher-energy threat environments (e.g., 10/1000 µs 1.5 kW surges); requires larger pad area and higher board real estate. | Choose SMCJ33CA when system-level surge testing exceeds 600 W or when thermal derating margins must exceed 2×. |
Compared with SMBJ33CA and SMCJ33CA, the SMBG33CA-E3/5B uniquely balances AEC-Q101 compliance, SMBG footprint compactness (4.57 mm × 3.94 mm), and 600 W capability - making it optimal for new automotive designs requiring qualification and layout efficiency without over-engineering.
Availability
SMBG33CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and consumer appliance motor control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG33CA-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, TVS devices, and optoelectronics with emphasis on reliability, precision, and automotive-grade qualification.
The SMBG series was developed specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance across temperature.
FAQ
What is the clamping voltage of SMBG33CA-E3/5B at its rated peak pulse current?
The SMBG33CA-E3/5B has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 11.3 A, measured under the standard 10/1000 µs waveform. This value is critical for ensuring downstream ICs remain within their absolute maximum voltage ratings during surge events, and is confirmed in Vishay's datasheet Document Number 88456, page 2.
Is SMBG33CA-E3/5B suitable for automotive applications?
Yes, SMBG33CA-E3/5B is AEC-Q101 qualified per Vishay's documentation, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its operating junction temperature range of –55 °C to +150 °C, MSL Level 1 rating, and validated reliability testing (including HTRB and temperature cycling) confirm its readiness for under-hood and cabin deployment.
What does the "CA" suffix indicate in SMBG33CA-E3/5B?
The "CA" suffix in SMBG33CA-E3/5B denotes a bidirectional transient voltage suppressor configuration, meaning the device provides symmetrical clamping in both polarities - essential for protecting AC-coupled or differential signal paths like CAN, LIN, or RS-485. This is distinct from "A"-suffixed unidirectional variants, which require correct polarity orientation during placement.
How does the SMBG33CA-E3/5B package differ from SMBJ or SMCJ equivalents?
The SMBG33CA-E3/5B uses the SMBG (DO-215AA) package - dimensionally distinct from SMBJ (DO-214AA) and SMCJ (DO-214AB). SMBG measures 4.57 mm × 3.94 mm × 2.10 mm, offering a lower profile than SMCJ and a slightly wider body than SMBJ. Its terminals are optimized for high-current handling while maintaining compatibility with standard 0.2" × 0.2" copper pads specified in Vishay's thermal derating guidelines.
What is the maximum reverse leakage current for SMBG33CA-E3/5B at its stand-off voltage?
The SMBG33CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 33 V and ambient temperature of 25 °C. This low leakage ensures minimal power loss and signal distortion in always-on circuits such as automotive sensor bias networks or industrial 4–20 mA loops, as verified in the Electrical Characteristics table on page 2 of Vishay's 88456 datasheet.
SMBG33CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG33CA-E3/5B FAQ
1.How can I place an order for SMBG33CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33CA-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 SMBG33CA-E3/5B reliable?
The price and inventory of SMBG33CA-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 SMBG33CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG33CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33CA-E3/5B?
SMBG33CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33CA-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 SMBG33CA-E3/5B?
For technical support, including SMBG33CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33CA-E3/5B requirements.
6.How does Aetrix verify that SMBG33CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG33CA-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 SMBG33CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG33CA-E3/5B?
All SMBG33CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33CA-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 SMBG33CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG33CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG33CA-E3/5B Tags
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