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Vishay General Semiconductor - Diodes Division SMBG20A-E3/52
- Part No.:
- SMBG20A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20A-E3/52.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,844
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Product details
Overview
SMBG20A-E3/52 from Vishay is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 32.4 V clamping voltage (VC) at 18.5 A peak pulse current, and 600 W peak pulse power handling with 10/1000 µs waveform - used to safeguard DC power inputs in industrial motor drives and telecom power supplies.
For engineers reviewing the SMBG20A-E3/52 datasheet, SMBG20A-E3/52 pinout, SMBG20A-E3/52 application, or SMBG20A-E3/52 equivalent, key selection criteria include its DO-215AA gull-wing package, unidirectional polarity (cathode marked), low leakage (<5 µA at 20 V), fast response time (<1.0 ps), and compatibility with automated SMT assembly under IPC-J-STD-020 reflow profiles.
Technical Context
This TVS diode employs a glass-passivated junction and low incremental surge resistance to achieve stable clamping performance during repetitive transients. Its design targets high-energy threats such as lightning-induced surges on AC/DC input lines and inductive switching spikes from solenoids or relay coils.
The device operates across –55 °C to +150 °C junction temperature range and maintains <5 µA reverse leakage at rated stand-off voltage, enabling reliable protection in thermally demanding environments like enclosed power converters and outdoor base station power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 20 V - maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 22.2–24.5 V at 1 mA test current - defines onset of avalanche conduction |
| Clamping Voltage (VC) | 32.4 V at 18.5 A peak pulse - limits downstream voltage stress during surge events |
| Peak Pulse Power (PPPM) | 600 W with 10/1000 µs waveform - supports IEC 61000-4-5 Level 4 surge immunity |
| Reverse Leakage (ID) | <5 µA at 20 V - ensures minimal standby power loss and signal integrity in low-current circuits |
| Response Time | <1.0 ps - enables protection of high-speed logic and analog front-ends against ESD and fast transients |
| Operating Temperature | –55 °C to +150 °C - suitable for under-hood automotive power modules and industrial PLC power inputs |
Pinout & Package
Package: DO-215AA gull-wing surface-mount plastic case per JEDEC standard; cathode indicated by color band on terminal; terminals solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected line (e.g., +VIN) when used in unidirectional configuration |
| Cathode | Current exit point during avalanche clamping | Connected to ground or low-impedance return path; marked with color band |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR under thermal cycling and humidity exposure |
| Low incremental surge resistance | Minimizes voltage overshoot during high-di/dt transients, improving clamping accuracy |
| UL 94V-0 flammability rating | Meets safety requirements for enclosed power supply enclosures and industrial control cabinets |
| High-temperature soldering tolerance | Withstands 250 °C for 10 seconds at terminals - compatible with lead-free reflow processes |
| Built-in strain relief | Reduces mechanical stress on solder joints during board flexure or thermal expansion mismatch |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 24 V DC input rails against inductive kickback from contactors and braking circuits. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp voltage spikes up to 600 W. Use Value: Prevents damage to upstream DC/DC controllers and downstream microcontrollers during frequent motor switching cycles. |
Use Scenario: Surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced surges on building feed lines. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 10/1000 µs transients while maintaining <5 µA leakage at nominal voltage. Use Value: Enables compliance with GR-1089-CORE Level 4 (4 kV line-to-ground) without derating or parallel staging. |
| Automotive Body Control Modules | Industrial PLC I/O Cards |
Use Scenario: Input protection for LIN bus transceivers and power window control ICs subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS on 12 V supply rail, clamping within 1 ps to limit voltage excursion below 33 V. Use Value: Maintains functional safety integrity during battery disconnect/reconnect events and alternator load dump. |
Use Scenario: Protection of isolated 24 V digital input channels against field-wiring induced transients in factory automation systems. IC Role / Device Role / Timing Role: Surface-mount TVS placed at connector interface to shunt surge energy before optocoupler input stage. Use Value: Eliminates need for discrete RC snubbers and reduces PCB footprint by 40% vs. through-hole alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/52 | Same electrical specs but DO-214AA modified J-bend package; 0.220" body length vs. 0.205" for SMBG20A-E3/52 | Requires different PCB pad layout; less suited for ultra-thin board designs due to taller profile | Select SMBJ20A-E3/52 only if legacy J-bend footprint is fixed and rework is not feasible |
| SMCJ20A-E3/52 | Same VWM/VC but higher 1500 W PPPM; DO-214AB package with larger thermal mass | Overqualified for 600 W threat levels; adds 30% board area and cost without performance benefit | Prefer SMBG20A-E3/52 where space-constrained SMT layouts and cost-sensitive BOMs require optimal 600 W density |
Compared with SMBJ20A-E3/52, SMBG20A-E3/52 offers tighter board space utilization via gull-wing leads and lower profile; compared with SMCJ20A-E3/52, it delivers identical clamping performance at half the footprint and cost for standard IEC 61000-4-5 Level 3–4 applications.
Availability
SMBG20A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and PLC I/O cards requiring stable component supply with full traceability and no obsolescence risk.
Supply support for SMBG20A-E3/52 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 Intertechnology is a global semiconductor and passive component manufacturer specializing in discrete power devices, sensors, and optoelectronics with emphasis on reliability and ruggedized packaging.
The SMBG series was developed specifically for high-reliability surface-mount transient suppression in space-constrained, thermally aggressive environments - targeting industrial, telecom, and automotive power system designers.
FAQ
What is the clamping voltage of SMBG20A-E3/52 at its rated peak pulse current?
The SMBG20A-E3/52 has a maximum clamping voltage (VC) of 32.4 V at 18.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet and ensures downstream components see no more than 32.4 V during standardized surge events - critical for protecting 3.3 V or 5 V logic interfaces powered from a 24 V rail.
Is SMBG20A-E3/52 unidirectional or bidirectional?
SMBG20A-E3/52 is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-215AA gull-wing package. It conducts only in reverse avalanche mode and must be oriented with cathode toward ground. Bidirectional variants use "C" or "CA" suffixes (e.g., SMBG20CA); SMBG20A-E3/52 is not rated for symmetrical clamping in both directions.
What is the maximum reverse leakage current for SMBG20A-E3/52 at 20 V?
At 20 V reverse bias and 25 °C ambient, SMBG20A-E3/52 exhibits a maximum reverse leakage current (ID) of 5 µA. This low leakage preserves efficiency in always-on power rails and avoids false triggering in high-impedance sensing circuits - verified per Vishay's Electrical Characteristics table for the SMBG20A device type.
Does SMBG20A-E3/52 meet UL 94V-0 flammability requirements?
Yes, SMBG20A-E3/52 uses a plastic package certified to UL 94V-0 flammability rating, as stated in the Vishay SMBG/SMBJ series datasheet. This certification confirms self-extinguishing behavior after flame exposure and is required for components used in enclosed industrial power supplies and telecom equipment meeting UL 60950-1 or IEC 62368-1 safety standards.
What is the recommended PCB pad layout for SMBG20A-E3/52?
Vishay recommends pad dimensions 0.010" (0.25 mm) longer than the terminal contact size along the lead axis to ensure proper solder fillet formation. For the DO-215AA gull-wing package of SMBG20A-E3/52, typical pad length is 0.090", width 0.050", with 0.085" center-to-center spacing - matching IPC-7351B SO-222A land pattern for optimal thermal and mechanical reliability.
SMBG20A-E3/52 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG20A-E3/52 FAQ
1.How can I place an order for SMBG20A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20A-E3/52 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-E3/52 reliable?
The price and inventory of SMBG20A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG20A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG20A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20A-E3/52?
SMBG20A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20A-E3/52 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-E3/52?
For technical support, including SMBG20A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20A-E3/52 requirements.
6.How does Aetrix verify that SMBG20A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG20A-E3/52 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-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG20A-E3/52?
All SMBG20A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20A-E3/52, 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-E3/52 part is unused and in its original packaging.
Return procedure for SMBG20A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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