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Vishay General Semiconductor - Diodes Division SMBG20A-E3/5B
- Part No.:
- SMBG20A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20A-E3/5B.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG20A-E3/5B 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), and 600 W peak pulse power (10/1000 µs). It clamps transients to ≤32.4 V at 18.5 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SMBG20A-E3/5B datasheet, SMBG20A-E3/5B pinout, SMBG20A-E3/5B application, or SMBG20A-E3/5B equivalent, this device serves as a robust, low-profile transient suppressor for DC power rails and signal lines where fast response (<1 ns), low clamping voltage, and high surge immunity (100 A IFSM) are required in space-constrained automotive and industrial designs.
Technical Context
This unidirectional TVS operates with a glass-passivated junction and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). Its 10/1000 µs waveform rating reflects standardized surge immunity per ANSI/IEEE C62.35, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
The device features a cathode-band polarity marking, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is rated for operation from –55 °C to +150 °C junction temperature. Its low incremental surge resistance enables stable clamping under repetitive transients at 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above VWM with controlled tolerance. |
| VC @ IPPM | ≤32.4 V at 18.5 A - Clamped voltage during 600 W transient; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling (10/1000 µs); supports high-energy ESD and load-dump suppression. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); validates robustness against inductive switching events. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing lead configuration with cathode band marking on one end. Dimensions: 6.48 mm × 3.94 mm × 2.10 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to ground or lower-potential rail; completes conduction path during negative transients. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line; blocks normal operation but avalanches into clamping when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables suppression of ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges in 12 V automotive systems. |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain, body control, and ADAS modules requiring long-term field reliability. |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| Glass passivated junction | Provides stable leakage performance (<1.0 µA at VWM) and long-term stability under thermal cycling. |
| Low profile SMBG package | Reduces board footprint vs. SMA/SMB; ideal for automated placement in high-density automotive PCBs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (up to 35 V, 400 ms) and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping excess voltage within nanoseconds. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤32.4 V, preventing latch-up or permanent damage. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector interface to shunt transients before reaching ADC front-end. Use Value: Maintains signal integrity with <1.0 µA leakage at 20 V, avoiding DC offset errors in precision measurement circuits. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Protection |
Use Scenario: Safeguarding AC/DC adapter primary-side controllers and MOSFETs against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Secondary-side TVS on DC output rail, absorbing residual transients that bypass Y-capacitor filtering. Use Value: Delivers 600 W pulse handling without degradation, ensuring compliance with IEC 61000-4-5 Level 3 (2 kV/1 kA) tests. |
Use Scenario: Protecting PoE-powered devices (e.g., IP cameras, access points) from induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Unidirectional clamp on each powered pair, referenced to local ground to prevent common-mode overvoltage. Use Value: Withstands 100 A surge (8.3 ms) and maintains ≤32.4 V clamping, preserving IEEE 802.3af/at functionality during field surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/5B | Same VWM (20 V), but lower PPPM = 600 W (same rating), higher VC = 32.4 V (identical), but SMBJ package has larger footprint (DO-214AA vs. DO-215AA). | SMBJ20A-E3/5B uses wider lead spacing and taller profile; unsuitable for ultra-thin or high-density layouts where SMBG's 2.10 mm height is critical. | Select SMBG20A-E3/5B when board space or Z-height is constrained; choose SMBJ20A-E3/5B only if legacy layout compatibility is required. |
| SMCJ20A-E3/5B | Same VWM and VBR, but higher PPPM = 1500 W and larger SMC (DO-214AB) package; VC = 32.4 V unchanged. | SMCJ20A-E3/5B targets higher-energy threats (e.g., ISO 16750-2 long-duration surges); its 7.11 mm height prevents use in low-profile automotive modules. | Choose SMBG20A-E3/5B for cost-optimized, space-efficient 600 W protection; reserve SMCJ20A-E3/5B for applications demanding >1 kW surge margin. |
Compared with SMBJ20A-E3/5B and SMCJ20A-E3/5B, SMBG20A-E3/5B delivers identical electrical clamping performance in a smaller, lower-profile package-making it optimal for next-generation automotive ECUs and compact industrial sensors where volume and thermal mass are tightly managed.
Availability
SMBG20A-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feeder surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMBG20A-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, efficiency, and automotive-grade qualification.
The SMBG Transient Voltage Suppressor family was engineered specifically for high-reliability, surface-mount transient protection in automotive, industrial, and communications systems where low profile, AEC-Q101 compliance, and repeatable clamping are mandatory.
FAQ
What is the maximum clamping voltage of SMBG20A-E3/5B under rated surge conditions?
The SMBG20A-E3/5B has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current of 18.5 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 32.4 V during transient events. The SMBG20A-E3/5B maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMBG20A-E3/5B suitable for automotive applications?
Yes, SMBG20A-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It meets stringent requirements for temperature cycling, high-temperature reverse bias, and ESD robustness. Its 150 °C maximum junction temperature, MSL Level 1 reflow rating, and glass-passivated junction make SMBG20A-E3/5B appropriate for engine control units, body electronics, and ADAS modules.
What does the "-E3/5B" suffix indicate in SMBG20A-E3/5B?
The "-E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads; "/5B" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-volume SMT assembly and is distinct from the "/52" variant (7-inch reel, 750 units). The SMBG20A-E3/5B is not AEC-Q101 qualified by suffix alone-the HE3 variant is required for automotive qualification.
How does SMBG20A-E3/5B compare to bidirectional TVS diodes like SMBG20CA?
SMBG20A-E3/5B is unidirectional and intended for DC line protection with defined polarity (cathode marked), while SMBG20CA is bidirectional and used in AC or floating signal paths. SMBG20A-E3/5B offers lower leakage (<1.0 µA at 20 V) and supports forward surge current (IFSM = 100 A), which SMBG20CA does not. For 12 V automotive power rails, SMBG20A-E3/5B is preferred; SMBG20CA suits RS-485 or CAN bus data lines.
What is the thermal resistance of SMBG20A-E3/5B, and how does it affect PCB layout?
SMBG20A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain reliability under repetitive surges, PCB layout must provide adequate copper area-minimum 0.2" × 0.2" pads-and avoid excessive trace length between SMBG20A-E3/5B and ground plane to minimize inductance and thermal impedance.
SMBG20A-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:
- 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-E3/5B FAQ
1.How can I place an order for SMBG20A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20A-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 SMBG20A-E3/5B reliable?
The price and inventory of SMBG20A-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 SMBG20A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG20A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20A-E3/5B?
SMBG20A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20A-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 SMBG20A-E3/5B?
For technical support, including SMBG20A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20A-E3/5B requirements.
6.How does Aetrix verify that SMBG20A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG20A-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 SMBG20A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG20A-E3/5B?
All SMBG20A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20A-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 SMBG20A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG20A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20A-E3/5B Tags
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