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Vishay General Semiconductor - Diodes Division SMBG20CA-M3/52
- Part No.:
- SMBG20CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20CA-M3/52.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,314
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Product details
Overview
SMBG20CA-M3/52 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 stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 32.4 V maximum clamping voltage (VC) at 18.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBG20CA-M3/52 datasheet, SMBG20CA-M3/52 pinout, SMBG20CA-M3/52 application, or SMBG20CA-M3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance data, and real-world protection use cases - all aligned to Vishay's official 88456 specification document dated 09-Jan-2024.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with no polarity marking on the device body. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing sub-microsecond transients induced by relay switching or motor commutation.
The SMBG20CA-M3/52 is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and delivers 100 °C/W typical junction-to-ambient thermal resistance when mounted on 5.0 mm × 5.0 mm copper pads - enabling reliable operation in under-hood automotive environments and high-density industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V automotive or 24 V industrial bus lines. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - tight breakdown tolerance ensures predictable turn-on across production lots and temperature range. |
| VC @ IPPM | 32.4 V at 18.5 A - clamping voltage limits downstream IC stress during 600 W transient events; stays below 36 V absolute max for common 3.3 V/5 V logic rails. |
| PPPM | 600 W - peak pulse power handling with 10/1000 μs waveform supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity testing. |
| IPPM | 18.5 A - peak pulse current capacity derived from VC and PPPM; confirms robustness against repetitive transients up to 0.01 % duty cycle. |
| TJ max | +150 °C - extended junction temperature rating enables placement near heat sources in engine control units or motor drives without derating. |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including HTOL, TCT, and ESD HBM ≥ 8 kV, ensuring long-term field performance. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile (max height 1.96 mm), halogen-free, RoHS-compliant molding compound meeting UL 94 V-0. Matte tin-plated leads ensure solderability per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical junction; accepts surge current in either direction without external biasing. |
| Cathode | Transient current exit (negative polarity) | Second terminal of symmetrical junction; completes bidirectional conduction path during voltage reversal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485, encoder outputs) without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 1 kV open-circuit / 500 A short-circuit without degradation. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, chassis, and ADAS modules where failure modes must meet ISO 26262 ASIL-B requirements. |
| Low profile SMBG package | 0.235" × 0.130" footprint (5.97 mm × 3.30 mm) allows placement adjacent to connectors or sensors in space-constrained ECUs. |
| Halogen-free (M3 suffix) | Complies with JEDEC JS709E and IPC-1752A environmental standards, supporting green manufacturing and end-of-life recycling mandates. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Voltage clamping element placed between sensor output and microcontroller ADC input to limit transient excursions to ≤32.4 V. Use Value: Prevents ADC saturation and latch-up in 3.3 V or 5 V MCU inputs while maintaining signal integrity during 100 ns–1 μs transients. | Use Scenario: Shielding 24 V digital input channels on PLC modules from inductive kickback generated by solenoid valve switching. IC Role / Device Role / Timing Role: Bidirectional shunt protector installed across input terminals to clamp reverse and forward surges before reaching optocoupler or level-shifter circuitry. Use Value: Eliminates need for separate unidirectional devices per polarity, reducing BOM count and PCB area by 50 % versus discrete diode+Zener solutions. |
| Automotive CAN Bus Line | Consumer Appliance Motor Control |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair in body control modules against ESD (IEC 61000-4-2 ±8 kV contact) and EFT (IEC 61000-4-4 ±1 kV). IC Role / Device Role / Timing Role: Low-capacitance (typ. 150 pF at 0 V) bidirectional TVS placed directly at connector entry point to divert fast transients before signal integrity loss. Use Value: Maintains <100 Mbps CAN FD signal fidelity due to minimal parasitic capacitance and sub-nanosecond response, avoiding bit errors or bus lockup. | Use Scenario: Suppressing commutation spikes on BLDC motor gate-drive signals in smart washing machines and HVAC fans. IC Role / Device Role / Timing Role: Clamp component across half-bridge high-side/low-side driver outputs to prevent overvoltage damage to MOSFETs and gate drivers during PWM transitions. Use Value: Extends MOSFET lifetime by limiting VDS overshoot to <36 V during 100 A inductive turn-off events, reducing avalanche stress cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG20CA-E3/52 | Same electrical specs and SMBG package; RoHS-compliant but not halogen-free (uses brominated flame retardant). | Acceptable for industrial equipment where halogen content is unrestricted; unsuitable for automotive OEMs requiring JS709E compliance. | Select SMBG20CA-E3/52 only if halogen-free certification is not mandated by your supply chain policy. |
| SMBJ20CA-M3 | Higher PPPM (600 W same), but larger SMB (DO-214AA) package (7.11 mm × 6.22 mm); identical VWM/VC ratings. | Requires PCB layout change due to 40 % larger footprint; preferred where higher thermal mass improves surge endurance in high-temperature enclosures. | Choose SMBJ20CA-M3 only when board space permits and enhanced thermal dissipation justifies re-layout effort. |
Compared with SMBG20CA-E3/52 and SMBJ20CA-M3, the SMBG20CA-M3/52 uniquely balances AEC-Q101 qualification, halogen-free construction, and compact SMBG footprint - making it optimal for automotive Tier-1 suppliers needing drop-in compliance with J1708/J2903 EMC requirements without sacrificing density.
Availability
SMBG20CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and consumer appliance motor control requiring stable component supply across multi-year production programs.
Supply support for SMBG20CA-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 validation, low-profile packaging, and precise clamping performance to replace legacy DO-15 and SMA designs.
FAQ
What is the maximum clamping voltage of SMBG20CA-M3/52 at its rated peak pulse current?
The SMBG20CA-M3/52 has a maximum clamping voltage (VC) of 32.4 V at its peak pulse current (IPPM) of 18.5 A, measured with a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and ensures downstream components like 3.3 V or 5 V MCUs remain within safe voltage limits during surge events. The SMBG20CA-M3/52 achieves this with low incremental surge resistance and fast response time.
Is SMBG20CA-M3/52 suitable for automotive applications?
Yes, SMBG20CA-M3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS modules. Its construction includes halogen-free molding compound (M3 suffix), matte tin-plated leads compliant with JESD 22-B102, and validation for HTOL, temperature cycling, and ESD (HBM ≥ 8 kV). The SMBG20CA-M3/52 meets stringent automotive reliability and environmental requirements without derating.
How does the SMBG20CA-M3/52 differ from unidirectional variants like SMBG20A-M3/52?
The SMBG20CA-M3/52 is bidirectional, meaning it clamps voltage transients equally in both polarities with no cathode band marking, whereas SMBG20A-M3/52 is unidirectional and marked with a cathode band. Electrically, SMBG20CA-M3/52 has symmetric VBR (22.2–24.5 V) and VC characteristics in both directions, enabling protection of AC or floating lines like CAN or RS-485. The SMBG20CA-M3/52 eliminates need for polarity-aware placement during automated assembly.
What is the thermal resistance of SMBG20CA-M3/52, and how does it affect layout?
SMBG20CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal ground planes; adding thermal vias or increasing pad area reduces RθJA. For sustained surge duty cycles >0.01 %, designers should verify junction temperature rise using SMBG20CA-M3/52's 150 °C TJ max rating and ambient conditions.
Does SMBG20CA-M3/52 require external biasing or series impedance for proper operation?
No, SMBG20CA-M3/52 operates as a passive shunt device and requires no external biasing, drivers, or series impedance to function. It remains in high-impedance standby until line voltage exceeds VBR, then clamps dynamically to limit voltage across protected nodes. For optimal performance, place SMBG20CA-M3/52 as close as possible to the protected port with minimal trace inductance - typical layouts use direct connection to connector pins or IC power/IO pins without added resistors or capacitors.
SMBG20CA-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:
- -
- 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-M3/52 FAQ
1.How can I place an order for SMBG20CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20CA-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 SMBG20CA-M3/52 reliable?
The price and inventory of SMBG20CA-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 SMBG20CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG20CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20CA-M3/52?
SMBG20CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20CA-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 SMBG20CA-M3/52?
For technical support, including SMBG20CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20CA-M3/52 requirements.
6.How does Aetrix verify that SMBG20CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG20CA-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 SMBG20CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG20CA-M3/52?
All SMBG20CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20CA-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 SMBG20CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBG20CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20CA-M3/52 Tags
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