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Vishay General Semiconductor - Diodes Division SMBG20CA-E3/52
- Part No.:
- SMBG20CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20CA-E3/52.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG20CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features 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), clamping voltage of 32.4 V at 18.5 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG20CA-E3/52 datasheet, SMBG20CA-E3/52 pinout, SMBG20CA-E3/52 application, or SMBG20CA-E3/52 equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VBR ≈ 1.45), junction temperature range (−55 °C to +150 °C), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, IPPM, and VC specifications for positive and negative transients. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), critical for protecting MOSFET gates and sensor signal lines against ESD and inductive switching spikes.
The device complies with ANSI/IEEE C62.35 surge standards and meets J-STD-020 MSL Level 1 (peak reflow 260 °C). Thermal resistance is RθJA = 100 °C/W (on recommended pad layout) and RθJL = 20 °C/W, enabling reliable operation under repetitive 0.01% duty-cycle surges without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 18–20 V rail protection. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients above nominal supply. |
| VC @ IPPM | 32.4 V at 18.5 A - Clamped voltage during 600 W surge; limits downstream IC stress to ≤32.4 V under worst-case 10/1000 μs event. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform; supports protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 μA - Ultra-low reverse leakage at stand-off voltage; prevents parasitic loading on high-impedance sensor or bias networks. |
| TJ Range | −55 °C to +150 °C - Full automotive-grade junction temperature range; validated for under-hood and engine-control module environments. |
| AEC-Q101 | Qualified - Certified for automotive electronic systems per stress-test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102 whisker testing (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | No polarity marking required; terminals function identically in either direction - enables single-component protection across AC-coupled or floating signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and load-dump transients in 12 V automotive systems without derating. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per AEC-Q101 requirements. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and direct placement into reflow ovens up to 260 °C peak - eliminates baking requirements pre-assembly. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs. |
| UL 94 V-0 molding compound | Meets flammability safety standards for enclosed automotive and industrial enclosures where fire propagation must be suppressed. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and body control module inputs from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, shunting >100 V transients within nanoseconds. Use Value: Maintains system uptime by preventing permanent damage to 5 V/12 V logic interfaces during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in PLC I/O modules from field-wiring induced transients. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) TVS placed differential-mode across signal pair to preserve signal integrity. Use Value: Limits transient-induced offset drift and ADC saturation while adding <0.5 pF parasitic capacitance per line. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in set-top boxes and smart displays against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Bidirectional clamp connected between data lines and chassis ground, activated within <1 ns of ESD strike. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without degradation after 1000 strikes. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced common-mode surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Paired SMBG20CA-E3/52 devices used in symmetrical configuration across tip/ring to ground, absorbing >500 V surges. Use Value: Enables compliance with GR-1089-CORE telecom surge immunity requirements while maintaining <−60 dB crosstalk at 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-T | Same VWM/VBR/VC, but SMB (DO-214AA) package; RθJA = 110 °C/W; not AEC-Q101 qualified. | Limited to industrial/commercial use; unsuitable for automotive under-hood deployment due to lower thermal performance and qualification gap. | Select when cost-sensitive non-automotive designs require identical electrical specs but relaxed qualification and thermal requirements. |
| SMCJ20CA | Higher PPPM = 1500 W; larger SMC (DO-214AB) package; VC = 32.4 V same, but IPPM = 46.5 A; RθJA = 50 °C/W. | Used where higher surge repetition rate or longer duration pulses (e.g., IEC 61000-4-5 ring wave) demand greater energy absorption. | Choose when system-level surge testing exceeds 600 W single-event capability or requires extended thermal dissipation under burst conditions. |
Compared with SMBJ20CA-T and SMCJ20CA, SMBG20CA-E3/52 uniquely balances automotive qualification, compact SMBG footprint, and precise 600 W clamping performance-making it optimal for space-constrained, thermally demanding, and AEC-Q101–mandated applications.
Availability
SMBG20CA-E3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, consumer USB port protection, and telecom DSL line protection requiring stable component supply and full traceability.
Supply support for SMBG20CA-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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS, MOSFETs, and optoelectronics with emphasis on reliability, precision, and automotive-grade validation.
The SMBG TRANSZORB® series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure-designed specifically for compact SMT layouts needing AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of SMBG20CA-E3/52 under a 600 W surge?
The SMBG20CA-E3/52 clamps to 32.4 V at its peak pulse current of 18.5 A (10/1000 μs waveform). This value is measured and guaranteed per Vishay's datasheet (Document Number: 88456, Rev. 09-Jan-2024), ensuring downstream components see no more than 32.4 V during standardized surge events. The SMBG20CA-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMBG20CA-E3/52 suitable for automotive applications?
Yes, SMBG20CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its −55 °C to +150 °C junction temperature range, MSL Level 1 reflow compatibility, and validation against HTGB/HTRB tests confirm suitability for engine control units, body electronics, and infotainment power rails. The SMBG20CA-E3/52 meets all stress-test requirements defined in the AEC-Q101 standard.
Does SMBG20CA-E3/52 have polarity markings?
No, SMBG20CA-E3/52 is a bidirectional TVS diode and carries no polarity marking on the case. Its symmetrical construction means both terminals function identically regardless of voltage polarity - essential for protecting AC-coupled signals, differential buses, or floating grounds. This distinguishes it from unidirectional variants like SMBG20A, which feature a cathode band.
What is the reverse leakage current of SMBG20CA-E3/52 at its stand-off voltage?
At its 20 V stand-off voltage (VWM), the SMBG20CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per the Vishay datasheet. This ultra-low leakage preserves signal integrity in high-impedance sensor bias networks and avoids unnecessary power drain in battery-operated systems. The SMBG20CA-E3/52 maintains leakage <5.0 μA up to +125 °C.
Can SMBG20CA-E3/52 be used in place of SMBJ20CA for automotive designs?
No - SMBG20CA-E3/52 should not be treated as a drop-in replacement for SMBJ20CA in automotive designs unless qualification alignment is confirmed. While both share identical VWM, VBR, and VC, only SMBG20CA-E3/52 is AEC-Q101 qualified and specified for automotive use. The SMBJ20CA lacks this qualification and has higher thermal resistance (RθJA = 110 °C/W vs. 100 °C/W), making SMBG20CA-E3/52 the validated choice for automotive deployments.
SMBG20CA-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:
- -
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG20CA-E3/52 FAQ
1.How can I place an order for SMBG20CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20CA-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 SMBG20CA-E3/52 reliable?
The price and inventory of SMBG20CA-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 SMBG20CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG20CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20CA-E3/52?
SMBG20CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20CA-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 SMBG20CA-E3/52?
For technical support, including SMBG20CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20CA-E3/52 requirements.
6.How does Aetrix verify that SMBG20CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG20CA-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 SMBG20CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG20CA-E3/52?
All SMBG20CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20CA-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 SMBG20CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG20CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20CA-E3/52 Tags
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