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Vishay General Semiconductor - Diodes Division SMBG20CA-M3/5B
- Part No.:
- SMBG20CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20CA-M3/5B.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,886
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Product details
Overview
SMBG20CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. It features 20 V standoff voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), 32.4 V maximum clamping voltage (VC) at 18.5 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG20CA-M3/5B datasheet, SMBG20CA-M3/5B pinout, SMBG20CA-M3/5B application, or SMBG20CA-M3/5B equivalent, key selection criteria include bidirectional surge protection capability, low clamping ratio (VC/VBR ≈ 1.45), MSL Level 1 reflow compatibility, halogen-free RoHS compliance, and suitability for 12 V automotive bus or sensor interface protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, IPPM, and VC specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), enabling effective suppression of ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) events.
The device uses a planar junction structure mounted on 5.0 mm × 5.0 mm copper pads, delivering RθJA = 100 °C/W and RθJL = 20 °C/W thermal performance. It supports repetitive surge duty cycle ≤0.01 % and is rated for TJ = –55 to +150 °C operation, meeting automotive under-hood temperature requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse/forward working voltage before clamping begins |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Ensures reliable triggering above system nominal voltage with margin |
| VC @ IPPM | 32.4 V at 18.5 A - Limits downstream IC voltage stress during 600 W transient events |
| PPPM | 600 W (10/1000 μs) - Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge waveforms |
| ID @ VWM | ≤1.0 μA - Negligible leakage current preserves low-power sensor or MCU input integrity |
| TJ max. | +150 °C - Supports placement near heat sources in engine control units or ADAS modules |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic systems per stress test requirements |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current into device during positive overvoltage event |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current into device during negative overvoltage event; symmetrical with Anode for bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| 600 W peak pulse power | Handles high-energy transients such as load dump spikes in 12 V automotive systems |
| AEC-Q101 qualification | Validates robustness for automotive applications including powertrain, body electronics, and infotainment |
| Halogen-free & RoHS compliant (M3 suffix) | Meets environmental compliance requirements for global OEM supply chains and industrial deployments |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow processes without pre-baking or special handling |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN/CAN node power rails against load dump and jump-start transients in vehicle body control modules. IC Role / Device Role: Bidirectional TVS placed between VBAT and GND, clamping surges up to ±32.4 V. Use Value: Prevents damage to 3.3 V/5 V MCUs and transceivers by limiting rail voltage excursion within safe operating range. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules exposed to field wiring noise. IC Role / Device Role: Shunt protector on 4–20 mA loop or 0–10 V output line, absorbing inductive kickback and EFT bursts. Use Value: Maintains signal integrity and extends sensor lifetime in factory automation environments with frequent relay switching. |
| Automotive Camera Module ESD Protection | USB 2.0 Data Line Surge Suppression |
Use Scenario: Front-end protection for MIPI CSI-2 data lanes in ADAS camera modules subjected to ISO 10605 ESD events. IC Role / Device Role: Low-capacitance bidirectional clamp on differential video pairs, referenced to common-mode voltage. Use Value: Provides <1.0 μA leakage and fast response without degrading 480 Mbps signal integrity or inducing jitter. | Use Scenario: Secondary-level surge protection on USB 2.0 D+/D– lines in automotive infotainment head units. IC Role / Device Role: Bidirectional TVS placed after primary ESD array, handling higher-energy transients that bypass front-end protection. Use Value: Adds system-level robustness against conducted surges while maintaining USB eye diagram compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG20CA-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Preferred for industrial non-automotive use where halogen-free requirement is absent | Select SMBG20CA-E3/5B when halogen-free material is not mandated and cost optimization is prioritized |
| SAC20CA-13-F | Same VWM/VBR/VC; DO-214AB (SMC) package, larger footprint and higher IPPM (22.5 A) | Better suited for higher-energy surge environments where PCB space allows larger package | Choose SAC20CA-13-F when board layout permits SMC and higher surge margin (>600 W) is required |
Compared with SMBG20CA-E3/5B, the SMBG20CA-M3/5B adds halogen-free compliance for stricter environmental programs; versus SAC20CA-13-F, it offers 30 % smaller PCB area and lower thermal mass but trades off ~22 % lower peak surge current rating.
Availability
SMBG20CA-M3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and USB data line protection requiring stable component supply and AEC-Q101-qualified reliability.
Supply support for SMBG20CA-M3/5B 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, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SMBG series was developed specifically for surface-mount transient suppression in space-constrained automotive and industrial systems, balancing low profile, high surge capability, and process compatibility.
FAQ
What is the clamping voltage of SMBG20CA-M3/5B at its rated peak pulse current?
The SMBG20CA-M3/5B has a maximum clamping voltage (VC) of 32.4 V at its peak pulse current (IPPM) of 18.5 A, measured using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is critical for ensuring downstream components remain within absolute maximum ratings. The SMBG20CA-M3/5B maintains this clamping performance bidirectionally.
Is SMBG20CA-M3/5B suitable for automotive applications?
Yes, SMBG20CA-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS camera modules. Its –55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and halogen-free construction meet Tier 1 OEM requirements. The SMBG20CA-M3/5B datasheet confirms qualification per AEC-Q101 test conditions.
How does the M3 suffix differ from E3 in SMBG20CA-M3/5B?
The M3 suffix indicates halogen-free, RoHS-compliant, and industrial-grade construction, whereas E3 denotes RoHS-compliant but non-halogen-free material. Both share identical electrical characteristics and package dimensions. The SMBG20CA-M3/5B is preferred where halogen-free compliance is mandated by environmental policies or customer specifications, especially in automotive supply chains.
What is the reverse leakage current of SMBG20CA-M3/5B at its standoff voltage?
At its 20 V standoff voltage (VWM), the SMBG20CA-M3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and battery-powered systems. The SMBG20CA-M3/5B maintains this specification across its full operating temperature range, with minor increase at elevated temperatures per derating curves.
Can SMBG20CA-M3/5B be used in bidirectional signal line protection?
Yes, SMBG20CA-M3/5B is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. It is commonly deployed on differential pairs (e.g., CAN, LIN, RS-485) and AC-coupled analog lines. The SMBG20CA-M3/5B achieves matched VBR and VC in both directions, eliminating need for orientation-aware placement.
SMBG20CA-M3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBG20CA-M3/5B FAQ
1.How can I place an order for SMBG20CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20CA-M3/5B 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 SMBG20CA-M3/5B reliable?
The price and inventory of SMBG20CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG20CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG20CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20CA-M3/5B?
SMBG20CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20CA-M3/5B 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 SMBG20CA-M3/5B?
For technical support, including SMBG20CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20CA-M3/5B requirements.
6.How does Aetrix verify that SMBG20CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG20CA-M3/5B 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 SMBG20CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG20CA-M3/5B?
All SMBG20CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20CA-M3/5B, 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 SMBG20CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBG20CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20CA-M3/5B Tags
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