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Vishay General Semiconductor - Diodes Division SMBG20A-M3/52
- Part No.:
- SMBG20A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20A-M3/52.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,885
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Product details
Overview
SMBG20A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and 18.5 A peak pulse current (IPPM), used to protect MOSFETs and signal lines in automotive powertrain control units against inductive switching transients.
For engineers reviewing the SMBG20A-M3/52 datasheet, SMBG20A-M3/52 pinout, SMBG20A-M3/52 application, or SMBG20A-M3/52 equivalent, key selection criteria include clamping voltage (32.4 V at IPPM), unidirectional polarity with cathode band marking, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), and thermal resistance (RθJA = 100 °C/W).
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by transient overvoltage events exceeding its breakdown threshold. It features glass-passivated junction construction for stable surge performance and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.
Designed for surface-mount automated assembly, SMBG20A-M3/52 uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM |
| VC @ IPPM | 32.4 V - Clamping voltage during 600 W transient limits stress on downstream ICs |
| IPPM | 18.5 A - Peak surge current handling capacity under standardized 10/1000 μs waveform |
| PPPM | 600 W - Peak pulse power rating defines maximum transient energy absorption capability |
| TJ max | +150 °C - Maximum junction temperature supports operation in under-hood automotive environments |
| RθJA | 100 °C/W - Thermal resistance determines required PCB copper area for sustained power dissipation |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount gull-wing leaded case with cathode band marking on one end. Dimensions: 6.48 mm × 5.97 mm × 2.41 mm (L × W × H); 0.2" × 0.2" copper pad layout recommended per datasheet fig. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground reference | Provides low-impedance path to ground during transient clamping; must be routed with minimal inductance |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line (e.g., 24 V rail) | Defines unidirectional polarity; reverse-biased during normal operation; conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JESD22 standards |
| Halogen-free & RoHS compliant (M3) | Meets environmental compliance requirements for industrial and automotive supply chains without brominated flame retardants |
| 600 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1, 2a, and 5a load-dump transients in 12/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during clamping, reducing risk of damage to sensitive gate drivers and microcontrollers |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free SMT assembly processes without moisture sensitivity concerns |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting high-side gate drivers in 24 V diesel engine ECU modules from inductive kickback during solenoid coil de-energization. IC Role / Device Role: Unidirectional TVS placed between driver output and ground to clamp negative transients below -35 V. Use Value: Limits voltage excursion to ≤32.4 V during 18.5 A surges, preventing latch-up or oxide breakdown in SiC MOSFET drivers. | Use Scenario: Safeguarding encoder signal lines (A/B/Z) in servo drives exposed to EMI from adjacent IGBT switching. IC Role / Device Role: Point-of-entry TVS on differential pair inputs to suppress common-mode transients up to 600 W. Use Value: Fast <1 ns response and 32.4 V clamping prevent false edge detection and position error in real-time motion control loops. |
| Telecom DC Power Input | Consumer Appliance Mainboard |
Use Scenario: Secondary-side transient suppression on 48 V PoE-powered base station RF modules after DC-DC conversion. IC Role / Device Role: Standoff-rated TVS on regulated 48 V bus to absorb residual surges escaping primary-side protection. Use Value: 20 V VWM allows safe operation across 48 V ±10% input range while clamping to 32.4 V to protect 3.3 V/5 V LDOs and PMICs. | Use Scenario: Overvoltage protection on main 12 V rail feeding MCU, display backlight, and fan controllers in smart refrigerator control boards. IC Role / Device Role: Unidirectional TVS placed at power entry point to shunt load-dump spikes from compressor startup. Use Value: AEC-Q101 qualification ensures long-term stability under thermal cycling and vibration, critical for 10+ year appliance lifetimes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG20A-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3) | Acceptable for industrial use where halogen-free requirement is not mandated | Select SMBG20A-E3/52 if halogen-free certification is not required and cost optimization is prioritized |
| SMBG20AHM3/52 | Identical specs plus AEC-Q101 qualification (HM3 suffix denotes AEC-Q101 + halogen-free) | Required for automotive safety-critical subsystems needing full AEC-Q101 traceability | Choose SMBG20AHM3/52 when functional safety documentation (PPAP, test reports) is mandatory |
Compared with SMBG20A-M3/52, SMBG20A-E3/52 lacks halogen-free compliance but offers identical clamping and surge performance, while SMBG20AHM3/52 adds formal AEC-Q101 certification-making it suitable for ASIL-B systems where SMBG20A-M3/52's industrial-grade AEC-Q101 (per base P/N-M3 note) may not satisfy audit requirements.
Availability
SMBG20A-M3/52 is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom DC power input applications requiring stable component supply, halogen-free compliance, and AEC-Q101 reliability validation.
Supply support for SMBG20A-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 high-reliability, automotive-qualified components.
The SMBG series was designed specifically for high-power transient suppression in space-constrained surface-mount applications across automotive, industrial, and telecom infrastructure, balancing 600 W surge capability with DO-215AA footprint efficiency.
FAQ
What is the clamping voltage of SMBG20A-M3/52 and how is it measured?
The SMBG20A-M3/52 has a maximum clamping voltage (VC) of 32.4 V, measured at its peak pulse current (IPPM) of 18.5 A under the standardized 10/1000 μs double-exponential waveform. This value is guaranteed per datasheet Table on page 2 and reflects worst-case voltage seen by protected circuitry during transient events, directly impacting system-level overvoltage margin design.
Is SMBG20A-M3/52 suitable for automotive applications?
Yes, SMBG20A-M3/52 is AEC-Q101 qualified per Vishay's base P/N-M3 definition in the Mechanical Data section, confirming compliance with stress tests for temperature cycling, humidity, and mechanical shock. It is widely deployed in non-safety-critical automotive modules such as body control units and HVAC controllers where industrial-grade AEC-Q101 validation suffices.
What does the "M3" suffix indicate in SMBG20A-M3/52?
The "M3" suffix in SMBG20A-M3/52 specifies halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance, and industrial-grade qualification. It distinguishes this variant from E3 (RoHS only) and HM3 (AEC-Q101 + halogen-free), confirming material compliance without implying full automotive certification unless paired with "H" prefix.
How does SMBG20A-M3/52 differ from bidirectional TVS diodes like SMBG20CA?
SMBG20A-M3/52 is unidirectional and features a cathode band marking, conducting only during reverse overvoltage events; SMBG20CA is bidirectional with no polarity marking and clamps symmetrically in both directions. The SMBG20A-M3/52's 20 V VWM applies only in reverse bias, whereas SMBG20CA provides 20 V standoff in either polarity-making them non-interchangeable without circuit redesign.
What PCB layout guidance applies to SMBG20A-M3/52 for optimal thermal performance?
Per Vishay datasheet Figure 2, SMBG20A-M3/52 requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads on each terminal to achieve the specified RθJA of 100 °C/W. Minimizing trace length and maximizing copper pour area beneath the SMBG (DO-215AA) body reduces thermal impedance and prevents localized overheating during repetitive surge events.
SMBG20A-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- 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)
SMBG20A-M3/52 FAQ
1.How can I place an order for SMBG20A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20A-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 SMBG20A-M3/52 reliable?
The price and inventory of SMBG20A-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 SMBG20A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG20A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20A-M3/52?
SMBG20A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20A-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 SMBG20A-M3/52?
For technical support, including SMBG20A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20A-M3/52 requirements.
6.How does Aetrix verify that SMBG20A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG20A-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 SMBG20A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG20A-M3/52?
All SMBG20A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20A-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 SMBG20A-M3/52 part is unused and in its original packaging.
Return procedure for SMBG20A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20A-M3/52 Tags
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