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Vishay General Semiconductor - Diodes Division SMBG30CA-E3/52
- Part No.:
- SMBG30CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG30CA-E3/52.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,227
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Product details
Overview
SMBG30CA-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 signal and power lines. It features a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 48.4 V at 12.4 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG30CA-E3/52 datasheet, SMBG30CA-E3/52 pinout, SMBG30CA-E3/52 application, or SMBG30CA-E3/52 equivalent, key selection criteria include bidirectional surge clamping performance, junction temperature derating above 25 °C, compliance with UL 497B and IEC 61000-4-2/4-4/4-5, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
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, lightning-induced transients, and inductive switching spikes.
The device uses a low-inductance SMBG (DO-215AA) surface-mount package with matte tin-plated leads, rated for MSL Level 1 (260 °C peak reflow), and exhibits thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead) under standard mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering during transients without premature conduction. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage during 600 W 10/1000 μs surge; determines maximum stress imposed on downstream components. |
| IPPM | 12.4 A - Peak pulse current capability under standardized waveform; directly supports IEC 61000-4-5 Level 4 (4 kV) surge immunity design. |
| PPPM | 600 W - Peak pulse power rating; enables protection against high-energy transients common in automotive load-dump and industrial switching environments. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial settings with appropriate PCB thermal design. |
| Leakage @ VWM | ≤1.0 μA - Ultra-low reverse leakage ensures minimal power loss and signal integrity impact in always-on sensor or communication lines. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical junction; accepts surge current in either direction without polarity dependency. |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; completes bidirectional conduction path during voltage reversal events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions eliminates need for polarity-aware layout and supports AC-coupled or floating signal line protection. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-enabling use in engine control, ADAS, and infotainment systems. |
| 600 W 10/1000 μs rating | Meets IEC 61000-4-5 surge immunity requirements up to Level 4 (4 kV line-to-earth), supporting robust front-end protection in industrial PLCs and telecom interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C Pb-free reflow without baking, simplifying manufacturing and reducing assembly risk. |
| UL 497B recognition | Underwriters Laboratories recognized for telecommunications protector classification (QVGQ2), supporting compliance in data line surge protection modules. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before they reach sensitive analog front-end circuitry. Use Value: Limits induced voltage to ≤48.4 V during 12.4 A surges, preventing ADC saturation or latch-up while maintaining <1.0 μA leakage for precision DC accuracy. | Use Scenario: Safeguarding CANH/CANL differential pair in vehicle body control modules subject to ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4). IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS mounted directly at connector interface to shunt fast transients before propagation into transceiver IC. Use Value: Sub-1 ns response ensures clamping activation prior to CAN transceiver damage threshold; symmetric VC preserves differential signal integrity during common-mode surges. |
| Telecom Line Card Surge Protection | Consumer USB Power Delivery Port |
Use Scenario: Front-end protection of xDSL or Ethernet PHY lines in DSLAMs and ONU equipment subjected to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary TVS stage placed before gas discharge tube (GDT) or secondary protection, handling initial energy absorption in 10/1000 μs waveforms. Use Value: 600 W rating enables single-device handling of 4 kV surges; UL 497B recognition supports regulatory approval for telecom infrastructure deployment. | Use Scenario: Overvoltage protection on VBUS line of USB-C PD ports in laptops and docking stations vulnerable to hot-swap transients and adapter faults. IC Role / Device Role / Timing Role: Bidirectional clamp across VBUS and ground to suppress ±20 V surges from faulty chargers or cable insertion events. Use Value: 30 V VWM aligns with USB PD 3.0 20 V max, while 48.4 V VC stays below 56 V safety limit-ensuring system-level compliance without compromising power delivery headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/52 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 13.9 A; SMBJ package has larger footprint (4.57 mm × 3.94 mm vs. SMBG's 4.57 mm × 3.94 mm - identical L/W but different leadform). | SMBJ offers marginally higher surge current handling but requires larger PCB pad area and lacks AEC-Q101 qualification. | Select SMBJ30CA-E3/52 only if board space permits larger package and automotive qualification is not required. |
| 1.5KE30CA | Higher PPPM = 1500 W, axial DO-201 package, VC = 48.4 V same, but slower response due to higher parasitic inductance; not RoHS-compliant in base version. | Through-hole mounting limits automation; unsuitable for high-frequency or space-constrained designs like automotive ECUs or portable electronics. | Choose 1.5KE30CA only for legacy through-hole systems where cost outweighs SMT manufacturability and ESD performance. |
Compared with SMBJ30CA-E3/52 and 1.5KE30CA, SMBG30CA-E3/52 uniquely combines AEC-Q101 qualification, SMBG's optimized SMT footprint, and verified 600 W surge capability-making it the preferred choice for new automotive and industrial SMT designs requiring certified reliability and compact layout.
Availability
SMBG30CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom line cards, and USB-C power delivery ports requiring stable component supply, AEC-Q101 compliance, and repeatable surge protection performance.
Supply support for SMBG30CA-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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The SMBG series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability applications-including automotive electronics, industrial controls, and telecom infrastructure-where AEC-Q101 compliance and MSL Level 1 process compatibility are mandatory.
FAQ
What is the clamping voltage of SMBG30CA-E3/52 at its rated peak pulse current?
The SMBG30CA-E3/52 has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 12.4 A under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC below downstream IC absolute maximum ratings is critical for reliable system-level protection design using SMBG30CA-E3/52.
Is SMBG30CA-E3/52 suitable for automotive applications?
Yes, SMBG30CA-E3/52 is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade product offering. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation over –55 °C to +150 °C junction temperature range-meeting requirements for engine control units, ADAS sensors, and body electronics. The "HE3" variant (e.g., SMBG30CAHE3/52) denotes full AEC-Q101 qualification, and SMBG30CA-E3/52 shares identical electrical and reliability specs per Vishay documentation.
How does the bidirectional nature of SMBG30CA-E3/52 affect its circuit implementation?
The SMBG30CA-E3/52 is inherently bidirectional, meaning it provides symmetrical clamping in both polarities without cathode/anode orientation constraints. This allows direct placement across any two nodes-such as CANH/CANL, RS-485 A/B, or AC signal lines-without polarity marking or layout restrictions. Unlike unidirectional TVS diodes, SMBG30CA-E3/52 eliminates risk of incorrect orientation during assembly and ensures consistent protection during voltage reversals, simplifying design and improving field reliability.
What is the maximum leakage current of SMBG30CA-E3/52 at its stand-off voltage?
The SMBG30CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 μA when biased at its rated stand-off voltage (VWM) of 30 V and ambient temperature of 25 °C. This ultra-low leakage ensures minimal power drain and negligible loading on high-impedance sensor outputs or battery-backed circuits. Leakage remains within specification across the full operating temperature range, supporting precision analog and always-on IoT applications where standby current budget is critical for SMBG30CA-E3/52 deployment.
Does SMBG30CA-E3/52 meet UL safety standards?
Yes, SMBG30CA-E3/52 carries Underwriters Laboratories recognition under UL 497B (QVGQ2) for telecommunications protectors and is listed in Vishay's UL file E136766. This certification confirms compliance with insulation, flammability (UL 94 V-0 molding compound), and surge withstand requirements for use in telecom, industrial, and consumer equipment requiring third-party safety validation. Designers may reference UL file E136766 to support end-product safety certifications involving SMBG30CA-E3/52.
SMBG30CA-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMBG30CA-E3/52 FAQ
1.How can I place an order for SMBG30CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG30CA-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 SMBG30CA-E3/52 reliable?
The price and inventory of SMBG30CA-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 SMBG30CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG30CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG30CA-E3/52?
SMBG30CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG30CA-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 SMBG30CA-E3/52?
For technical support, including SMBG30CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30CA-E3/52 requirements.
6.How does Aetrix verify that SMBG30CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG30CA-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 SMBG30CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG30CA-E3/52?
All SMBG30CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30CA-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 SMBG30CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG30CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG30CA-E3/52 Tags
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