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Vishay General Semiconductor - Diodes Division SMBG33A-M3/52
- Part No.:
- SMBG33A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33A-M3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,607
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Product details
Overview
SMBG33A-M3/52 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, 53.3 V clamping voltage (VC) at 11.3 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against inductive switching transients.
For engineers reviewing the SMBG33A-M3/52 datasheet, SMBG33A-M3/52 pinout, SMBG33A-M3/52 application, or SMBG33A-M3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 100 °C/W), and junction temperature range (–55 °C to +150 °C) - all critical for ESD/surge protection design-in and BOM validation.
Technical Context
This unidirectional TVS operates as a clamping device: it remains high-impedance below VWM = 33 V, then avalanches sharply at VBR = 36.7–40.6 V to limit transient overvoltage. Its low incremental surge resistance ensures stable clamping under repetitive 10/1000 μs surges up to 600 W, with <1 ns response time enabling protection of fast-switching power stages.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads per terminal, SMBG33A-M3/52 meets J-STD-020 MSL Level 1 (peak reflow 260 °C), supports 100 A non-repetitive forward surge (IFSM), and features glass-passivated junction for reliability in harsh environments including automotive under-hood applications.
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 - precise avalanche onset range defining turn-on threshold |
| VC @ IPPM | 53.3 V at 11.3 A - clamped voltage during 600 W transient, limiting stress on downstream ICs |
| PPPM | 600 W (10/1000 μs) - peak surge energy handling capacity without failure |
| TJ max. | +150 °C - enables operation in engine control units and industrial motor drives |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 5 mm × 5 mm pads |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
| Halogen-free | Yes (M3 suffix) - compliant with IEC 61249-2-21 and JEDEC J-STD-201 Class 2 whisker resistance |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount gull-wing lead frame with cathode band marking. Dimensions: 6.48 mm × 3.94 mm × 2.10 mm (L × W × H); terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; defines current flow direction during clamping |
| Cathode | Protected line input | Connected to the signal or power line being protected; marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics without additional qualification effort |
| Halogen-free (M3) | Meets environmental compliance mandates for Tier 1 automotive suppliers and industrial OEMs |
| MSL Level 1 rating | Allows single-pass reflow at 260 °C without moisture-induced popcorning or delamination |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage margin between breakdown and clamping, improving system-level surge margin |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and inductive kickback during relay switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients above 33 V. Use Value: Limits peak voltage to ≤53.3 V during 600 W surges, preventing damage to 36 V-rated DC-DC controllers and CAN transceivers. | Use Scenario: Safeguarding gate drivers and microcontrollers connected to IGBT half-bridges in variable-frequency drives. IC Role / Device Role / Timing Role: Clamping transient spikes induced by fast IGBT turn-off on low-voltage control rails. Use Value: Responds in <1 ns to suppress >100 V spikes, preserving logic-level integrity and avoiding false triggering of protection circuits. |
| Automotive Sensor Signal Lines | Industrial PLC Analog Input Protection |
Use Scenario: Shielding LIN bus or analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with signal trace to ground. Use Value: Delivers 53.3 V clamping while maintaining signal fidelity due to minimal parasitic capacitance (<100 pF at 0 V). | Use Scenario: Guarding 4–20 mA current-loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS shunting transient energy from loop supply to earth ground. Use Value: Withstands 100 A surge (IFSM) and maintains 33 V operating window, ensuring loop accuracy and long-term calibration stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG33A-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Acceptable for industrial use where halogen-free is not mandated | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is not needed |
| SMBG33AHM3/52 | Identical specs plus AEC-Q101 qualification (HM3 suffix denotes halogen-free + automotive grade) | Required for automotive powertrain modules and safety-critical body control units | Choose when full automotive qualification and halogen-free compliance are both mandatory |
Compared with SMBG33A-M3/52, SMBG33A-E3/52 lacks halogen-free certification and automotive qualification, while SMBG33AHM3/52 adds AEC-Q101 validation - making the latter suitable for safety-critical automotive zones where the base M3 part meets general industrial and non-safety automotive needs.
Availability
SMBG33A-M3/52 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive interface hardening, and sensor signal line surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMBG33A-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for high-reliability industrial, automotive, and computing applications.
The SMBG TransZORB® series targets board-level transient protection with standardized DO-215AA packaging, optimized clamping performance, and automotive-grade qualification - specifically engineered for robustness in electrically noisy power systems.
FAQ
What is the clamping voltage of SMBG33A-M3/52 and how is it measured?
The SMBG33A-M3/52 has a maximum clamping voltage (VC) of 53.3 V, measured at 11.3 A peak pulse current (IPPM) using a 10/1000 μs waveform per IEC 61000-4-5. This value reflects the actual voltage seen by protected circuitry during a standardized surge event and is guaranteed across the operating temperature range of –55 °C to +150 °C. The SMBG33A-M3/52 achieves this clamping performance with low incremental resistance, ensuring predictable voltage limiting under real-world transients.
Is SMBG33A-M3/52 suitable for automotive applications?
Yes, SMBG33A-M3/52 is halogen-free and RoHS-compliant, and its base family is AEC-Q101 qualified - though the M3 suffix alone does not denote automotive qualification. For full automotive compliance, Vishay specifies the SMBG33AHM3/52 variant. Engineers deploying SMBG33A-M3/52 in automotive subsystems must verify qualification alignment with their Tier 1 requirements; the SMBG33A-M3/52 itself is widely used in non-safety-critical automotive modules such as lighting controls and infotainment power rails.
What is the meaning of the "M3" and "52" in SMBG33A-M3/52?
In SMBG33A-M3/52, "M3" indicates halogen-free, RoHS-compliant, industrial-grade construction per Vishay's material coding; "52" denotes the preferred package code for 7″ diameter plastic tape-and-reel delivery with 750 units per reel. This ordering format ensures consistent assembly-line compatibility and traceability. The SMBG33A-M3/52 is supplied in that exact configuration, supporting automated pick-and-place processes without rework or repackaging.
How does SMBG33A-M3/52 compare to bidirectional TVS diodes like SMBG33CA?
SMBG33A-M3/52 is unidirectional and designed for DC-biased lines where polarity is fixed (e.g., 12 V supply rails), offering lower leakage and sharper turn-on than bidirectional variants. In contrast, SMBG33CA provides symmetrical clamping for AC or floating signals but exhibits higher reverse leakage and slightly reduced clamping efficiency. For applications requiring polarity-aware protection with minimal standby current, SMBG33A-M3/52 is preferred; the SMBG33A-M3/52 cannot replace SMBG33CA in AC-coupled or differential signal paths without circuit redesign.
What PCB layout guidance applies to SMBG33A-M3/52 for optimal thermal and electrical performance?
For optimal performance, mount SMBG33A-M3/52 on minimum 5.0 mm × 5.0 mm copper pads per terminal, per Vishay's recommended pad layout. Use short, wide traces to minimize inductance between the TVS and protected node, and ensure solid ground plane connection to handle 11.3 A peak pulse current without excessive voltage overshoot. Thermal relief is not required due to RθJA = 100 °C/W; however, adding thermal vias under pads improves sustained surge handling. The SMBG33A-M3/52 benefits from this layout to maintain clamping integrity during repetitive transients.
SMBG33A-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:
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG33A-M3/52 FAQ
1.How can I place an order for SMBG33A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33A-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 SMBG33A-M3/52 reliable?
The price and inventory of SMBG33A-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 SMBG33A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG33A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33A-M3/52?
SMBG33A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33A-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 SMBG33A-M3/52?
For technical support, including SMBG33A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33A-M3/52 requirements.
6.How does Aetrix verify that SMBG33A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG33A-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 SMBG33A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG33A-M3/52?
All SMBG33A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33A-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 SMBG33A-M3/52 part is unused and in its original packaging.
Return procedure for SMBG33A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG33A-M3/52 Tags
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