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Vishay General Semiconductor - Diodes Division SMBG33CA-M3/52
- Part No.:
- SMBG33CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33CA-M3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,806
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Product details
Overview
SMBG33CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features a 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), clamping voltage of 53.3 V at 11.3 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG33CA-M3/52 datasheet, SMBG33CA-M3/52 pinout, SMBG33CA-M3/52 application, or SMBG33CA-M3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.4), halogen-free RoHS compliance (M3 suffix), and suitability for CAN/LIN bus, sensor I/O, and DC power rail protection in harsh environments.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 33 V), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surges.
The SMBG33CA-M3/52 uses a symmetrical bidirectional structure-no polarity marking-enabling protection against both positive and negative transients without external orientation constraints. Thermal resistance is rated at RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads), supporting operation up to TJ = 150 °C with appropriate PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 53.3 V at 11.3 A - Clamped voltage during 10/1000 μs surge; determines maximum stress on protected ICs. |
| PPPM | 600 W - Peak pulse power handling per JEDEC standard; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity. |
| ID @ VWM | 1.0 μA - Reverse leakage at rated stand-off; negligible loading on high-impedance sensor or communication lines. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or industrial enclosures. |
| Package | SMBG (DO-215AA) - Surface-mount gull-wing leadframe; compatible with automated SMT placement and reflow (MSL level 1, 260 °C peak). |
Pinout & Package
Package: SMBG (DO-215AA), molded plastic case with matte tin-plated gull-wing leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Bidirectional construction means no cathode/anode distinction - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connected across protected line (e.g., CAN_H–CAN_L); conducts surge current bidirectionally. |
| Terminal 2 | Transient input/output node | Second terminal of symmetrical TVS; forms low-inductance clamp path with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS compliant (M3) | Meets environmental compliance requirements for global OEM supply chains without compromising thermal or electrical performance. |
| 600 W peak pulse power (10/1000 μs) | Withstands repeated lightning-induced surges per IEC 61000-4-5, enabling single-device protection for 12 V/24 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to 3.3 V/5 V interface ICs. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity exposure. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against load dump, ESD, and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping fast-rising transients before they reach CAN transceiver. Use Value: Maintains signal integrity by limiting voltage excursion to ≤53.3 V while surviving >1000 surges per IEC 61000-4-5, extending transceiver lifetime. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA, 0–10 V) and digital I/O (I²C, SPI) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across sensor output and ground, absorbing inductive kickback from nearby solenoids or motors. Use Value: Prevents false readings and sensor lockup by suppressing ±1 kV transients within <1 ns response time, with <1 μA leakage preserving measurement accuracy. |
| DC Power Rail Protection (12 V) | Telecom Interface Protection |
Use Scenario: Guarding 12 V supply inputs of infotainment head units and telematics modules against battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across input rail and ground, conducting surge energy to chassis during overvoltage events. Use Value: Limits rail voltage to 53.3 V during 600 W surges, preventing damage to LDOs and PMICs while maintaining MSL-1 reflow compatibility. | Use Scenario: Protecting RS-485/RS-232 transceivers in base station backhaul equipment exposed to induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamp between data line pairs (e.g., A–B) and ground, providing common-mode and differential-mode suppression. Use Value: Enables compliance with ITU-T K.21 basic protection level via symmetrical clamping and 150 °C junction rating for outdoor cabinet deployment. |
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-M3/52 | Same VWM/VBR/VC specs, but SMB (DO-214AA) package - 2.5 mm wider, 0.2 mm taller, higher RθJA (120 °C/W). | Larger footprint; less suitable for ultra-dense layouts but offers slightly higher IFSM (100 A vs. 100 A same). | Select SMBJ33CA-M3/52 only if existing PCB uses SMB pad layout or requires marginally higher surge endurance. |
| SMCJ33CA-M3 | Same electrical specs, but SMC (DO-214AB) package - 7.1 mm × 6.2 mm, RθJA = 40 °C/W, higher PPPM derating capability. | Significantly larger footprint; better thermal performance for sustained surge duty cycles. | Choose SMCJ33CA-M3 for high-reliability industrial power supplies where thermal management outweighs board space constraints. |
Compared with SMBG33CA-M3/52, SMBJ33CA-M3/52 trades compactness for legacy footprint compatibility, while SMCJ33CA-M3 prioritizes thermal robustness over miniaturization - making SMBG33CA-M3/52 optimal for space-constrained automotive and portable industrial designs requiring AEC-Q101 and halogen-free compliance.
Availability
SMBG33CA-M3/52 is available at Aetrix Electronics and suitable for automotive CAN bus protection, industrial sensor interface hardening, and 12 V DC power rail safeguarding requiring stable component supply across multi-year production programs.
Supply support for SMBG33CA-M3/52 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, efficiency, and application-specific optimization.
The SMBG series was engineered for high-density surface-mount transient suppression in automotive and industrial systems, balancing compact size, AEC-Q101 qualification, and consistent clamping performance across temperature and life cycle.
FAQ
What is the clamping voltage of SMBG33CA-M3/52 and how is it measured?
The SMBG33CA-M3/52 has a maximum clamping voltage (VC) of 53.3 V, measured at a peak pulse current (IPPM) of 11.3 A using a standardized 10/1000 μs double-exponential waveform. This value reflects worst-case voltage seen by downstream circuitry during surge events and is guaranteed across temperature and production lots per Vishay's datasheet revision 09-Jan-2024.
Is SMBG33CA-M3/52 suitable for automotive applications?
Yes, SMBG33CA-M3/52 is AEC-Q101 qualified and specifically designed for automotive use. Its bidirectional architecture, 150 °C maximum junction temperature, halogen-free M3 construction, and robust surge handling make it appropriate for CAN/LIN bus protection, sensor interfaces, and power supply inputs in engine control units, body control modules, and ADAS subsystems.
How does the M3 suffix affect SMBG33CA-M3/52 compliance and performance?
The M3 suffix indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance standards. It imposes no electrical or thermal performance trade-offs versus E3 variants - all key parameters (VWM, VBR, VC, PPPM) remain identical; only material content differs to meet strict environmental mandates.
What is the thermal resistance of SMBG33CA-M3/52 and how does it impact layout?
SMBG33CA-M3/52 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 operation near TJ max = 150 °C, designers must ensure adequate copper area and avoid excessive ambient temperatures - especially critical in sealed automotive enclosures.
Can SMBG33CA-M3/52 replace unidirectional TVS diodes in existing designs?
No - SMBG33CA-M3/52 is strictly bidirectional and lacks polarity marking; it cannot substitute for unidirectional devices like SMBG33A-M3/52 without circuit review. Unidirectional types conduct only in reverse bias and require correct cathode orientation, whereas SMBG33CA-M3/52 clamps symmetrically in both directions, altering protection behavior on DC-biased lines.
SMBG33CA-M3/52 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG33CA-M3/52 FAQ
1.How can I place an order for SMBG33CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33CA-M3/52 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-M3/52 reliable?
The price and inventory of SMBG33CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG33CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG33CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33CA-M3/52?
SMBG33CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33CA-M3/52 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-M3/52?
For technical support, including SMBG33CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33CA-M3/52 requirements.
6.How does Aetrix verify that SMBG33CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG33CA-M3/52 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-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG33CA-M3/52?
All SMBG33CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33CA-M3/52, 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-M3/52 part is unused and in its original packaging.
Return procedure for SMBG33CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG33CA-M3/52 Tags
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