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Vishay General Semiconductor - Diodes Division SMBG30CA-E3/5B
- Part No.:
- SMBG30CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG30CA-E3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,591
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Product details
Overview
SMBG30CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive signal lines and power rails. It features 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-E3/5B datasheet, SMBG30CA-E3/5B pinout, SMBG30CA-E3/5B application, or SMBG30CA-E3/5B equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VBR ≈ 1.4), MSL Level 1 reflow compatibility, TJ max = 150 °C, and compliance with UL 497B for telecom/sensor line protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions-enabling simplified layout for AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for suppressing ESD and lightning-induced transients.
The device uses a low-inductance SMBG (DO-215AA) surface-mount package with matte tin-plated leads, rated for 100 A IFSM (unidirectional only-not applicable here), and achieves thermal resistance RθJA = 100 °C/W on 5.0 mm × 5.0 mm copper pads-supporting reliable operation under repetitive surge conditions up to 0.01% duty cycle.
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 ensuring predictable turn-on during transients. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage under 600 W 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capacity; supports high-energy transients without failure. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on systems. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
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), compliant with JEDEC DO-215AA standard and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A (bidirectional) | One side of symmetrical PN junction; connects to either side of protected line without polarity constraint. |
| Cathode | Terminal B (bidirectional) | Other side of symmetrical PN junction; functionally identical to Anode in bidirectional mode-no cathode band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating sensor outputs without external polarity management. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly laid out on recommended 5.0 mm × 5.0 mm copper pads. |
| Low clamping voltage ratio | VC/VBR ≈ 1.4 ensures minimal overvoltage overshoot-critical for safeguarding 3.3 V or 5 V logic interfaces. |
| MSL Level 1, 260 °C peak | Supports lead-free reflow soldering without preconditioning; eliminates moisture-related popcorning risk during assembly. |
| UL 497B recognized | Validated for telecom and data line protection per Underwriters Laboratories safety standard QVGQ2 (E136766). |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to clamp ±30 V transients within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in microcontrollers and analog front-ends while maintaining signal fidelity due to <1.0 µA leakage. | Use Scenario: Safeguarding full-duplex RS-485 transceivers (e.g., MAX1487, SN65HVD72) against ESD and induced surges in factory automation networks. IC Role / Device Role / Timing Role: Placed across A/B differential pair to suppress common-mode transients without disrupting DC bias or signal swing. Use Value: Maintains data integrity up to 10 Mbps by limiting clamping voltage to 48.4 V-well below transceiver absolute maximum ratings. |
| Consumer USB Port Protection | Telecom DSL Line Protection |
Use Scenario: Shielding USB 2.0 D+/D− lines in smart home hubs and portable devices from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS installed adjacent to connector to minimize trace inductance and response delay. Use Value: Achieves <1 ns response with <0.5 pF typical junction capacitance (per Fig. 4), preserving signal rise/fall times and eye diagram integrity. | Use Scenario: Front-end protection of ADSL/VDSL line drivers and receivers against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Installed between tip/ring and ground in primary protection stage, coordinated with gas discharge tube (GDT) secondary stage. Use Value: UL 497B recognition and 600 W surge rating enable compliance with ITU-T K.20/K.21 telecom surge immunity standards. |
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 | Same VWM (30 V), identical SMB (DO-214AA) package but 600 W rating; slightly higher VC (48.4 V vs. 48.4 V-same value), same AEC-Q101 qualification. | SMBJ series uses larger DO-214AA footprint (4.57 mm × 3.94 mm × 2.31 mm); requires PCB pad revision. | Select SMBJ30CA only if existing layout accommodates DO-214AA or higher thermal mass is needed (RθJA = 85 °C/W). |
| 1.5KE30CA | Same VWM and bidirectionality, but through-hole DO-201AD package; 1500 W PPPM, higher VC (49.9 V), no AEC-Q101 qualification. | Not suitable for automated SMT assembly; intended for prototyping or legacy through-hole designs. | Choose 1.5KE30CA only for manual assembly or where higher surge margin justifies larger size and lack of automotive qualification. |
Compared with SMBG30CA-E3/5B, SMBJ30CA offers identical electrical performance in a marginally taller package, while 1.5KE30CA trades SMT compatibility and automotive qualification for higher surge rating and through-hole mounting-making SMBG30CA-E3/5B optimal for space-constrained, production-ready automotive and industrial SMT designs.
Availability
SMBG30CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, consumer USB ports, and telecom line protection requiring stable component supply, AEC-Q101 assurance, and consistent DO-215AA packaging.
Supply support for SMBG30CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-volume, high-reliability surface-mount transient suppression in automotive and industrial environments-prioritizing low profile, AEC-Q101 compliance, and precise clamping performance in compact DO-215AA packages.
FAQ
What does the "CA" suffix indicate in SMBG30CA-E3/5B?
The "CA" suffix in SMBG30CA-E3/5B denotes a bidirectional transient voltage suppressor configuration, meaning the device provides symmetrical clamping in both polarities-ideal for protecting AC-coupled lines, differential interfaces like RS-485, or floating sensor outputs without polarity constraints. This differs from unidirectional "A" variants, which require correct anode/cathode orientation.
Is SMBG30CA-E3/5B suitable for automotive applications?
Yes, SMBG30CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with operating junction temperatures up to +150 °C. Its glass-passivated junction, MSL Level 1 reflow compatibility, and UL 497B recognition make it appropriate for CAN/LIN bus protection, ADAS sensor interfaces, and body control modules.
What is the clamping voltage of SMBG30CA-E3/5B and why does it matter?
The clamping voltage (VC) of SMBG30CA-E3/5B is 48.4 V at 12.4 A peak pulse current (10/1000 µs waveform). This value matters because it defines the maximum voltage imposed on protected circuitry during a surge-ensuring downstream ICs (e.g., 3.3 V or 5 V microcontrollers) remain within safe absolute maximum ratings and avoid destructive overvoltage stress.
How does the SMBG (DO-215AA) package compare to SMB (DO-214AA) in SMBG30CA-E3/5B?
The SMBG (DO-215AA) package used in SMBG30CA-E3/5B has identical length and width (4.57 mm × 3.94 mm) to SMB (DO-214AA) but is thinner (2.10 mm vs. 2.31 mm), enabling lower profile designs and improved board-level shock resistance. Both share the same terminal geometry and solderability, but SMBG's reduced height supports tighter stacking and conformal coating clearance in space-constrained assemblies.
Does SMBG30CA-E3/5B require special PCB layout considerations?
Yes-optimal performance of SMBG30CA-E3/5B requires mounting on minimum 5.0 mm × 5.0 mm copper pads per terminal to achieve rated 600 W pulse power and thermal dissipation. Short, direct traces to ground planes minimize inductance and preserve sub-nanosecond response; avoid vias or long stubs between TVS and protected node. The SMBG30CA-E3/5B datasheet specifies this pad layout in Figure 5 and Table "Thermal Characteristics".
SMBG30CA-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:
- -
- 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-E3/5B FAQ
1.How can I place an order for SMBG30CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG30CA-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 SMBG30CA-E3/5B reliable?
The price and inventory of SMBG30CA-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 SMBG30CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG30CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG30CA-E3/5B?
SMBG30CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG30CA-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 SMBG30CA-E3/5B?
For technical support, including SMBG30CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30CA-E3/5B requirements.
6.How does Aetrix verify that SMBG30CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG30CA-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 SMBG30CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG30CA-E3/5B?
All SMBG30CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30CA-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 SMBG30CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG30CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG30CA-E3/5B Tags
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