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Vishay General Semiconductor - Diodes Division SMBG30CA-M3/5B
- Part No.:
- SMBG30CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG30CA-M3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,778
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Product details
Overview
SMBG30CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. 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-grade reliability.
For engineers reviewing the SMBG30CA-M3/5B datasheet, SMBG30CA-M3/5B pinout, SMBG30CA-M3/5B application, or SMBG30CA-M3/5B equivalent, key selection criteria include bidirectional surge suppression capability, low clamping ratio (VC/VBR ≈ 1.37), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its VWM threshold and diverting surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior for positive and negative polarity surges, making it suitable for AC-coupled or floating signal lines.
The SMBG30CA-M3/5B uses a glass-passivated silicon junction and achieves 600 W peak pulse power under standardized 10/1000 µs waveform conditions at ≤0.01% duty cycle. Thermal resistance is rated at RθJA = 100 °C/W (on 0.2" × 0.2" pads) and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across manufacturing lot. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamping voltage during 600 W surge; limits protected node voltage to safe level. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IPPM | 12.4 A - Peak surge current corresponding to 600 W clamping; determines minimum trace/solder joint current capacity. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic modules requiring stress-tested reliability and failure mode coverage. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path (bidirectional) | One terminal of symmetrical PN junction; connects to protected line or ground reference depending on layout. |
| Cathode | Surge return path (bidirectional) | Second terminal of symmetrical PN junction; electrically identical to Anode; no functional distinction in CA-type devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance for ± polarity transients-enables single-device protection of AC signals or differential buses. |
| 600 W peak pulse power | Validated under 10/1000 µs waveform at 0.01% duty cycle-meets IEC 61000-4-5 surge immunity requirements for industrial and automotive systems. |
| AEC-Q101 qualification | Passed stress tests including HTGB, HTRB, TCT, and ESD-certifies suitability for automotive control units, ADAS sensors, and infotainment interfaces. |
| Halogen-free & RoHS compliant (M3) | Meets JEDEC J-STD-201 Class 2 whisker resistance and UL 94 V-0 flammability-supports green manufacturing and end-product compliance. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against load dump and ESD events per ISO 7637-2 and ISO 10605. IC Role / Device Role / Timing Role: Shunt TVS placed across differential pair to clamp common-mode surges while preserving signal integrity up to 1 Mbps. Use Value: SMBG30CA-M3/5B's 48.4 V clamping voltage prevents CAN transceiver damage during 12 V system transients, and its bidirectional symmetry avoids polarity-dependent installation errors. | Use Scenario: Safeguarding analog output (4–20 mA) or digital I/O lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) shunt protector placed at connector entry point to absorb induced lightning surges and switching noise. Use Value: SMBG30CA-M3/5B's 30 V VWM allows full-range operation of 24 V sensor supplies, and its 600 W rating handles repetitive 1 kV/500 A surges without degradation. |
| Telecom Ethernet PHY Interface | Consumer USB Port ESD Protection |
Use Scenario: Transient suppression on 10/100BASE-TX transformer-coupled pairs exposed to telecom line surges (ITU-T K.21 basic level). IC Role / Device Role / Timing Role: Bidirectional TVS mounted across each twisted pair to limit common-mode voltage excursion during longitudinal surges. Use Value: SMBG30CA-M3/5B's symmetric clamping ensures balanced protection without skewing differential signaling, and its DO-215AA footprint minimizes board space vs. SMA alternatives. | Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines behind primary polymer-based TVS, targeting IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response silicon TVS providing sub-100 ps clamping to prevent latch-up in USB transceivers during human-body-model events. Use Value: SMBG30CA-M3/5B's 48.4 V clamping voltage stays below USB 2.0 absolute maximum ratings (–0.5 V to +6 V), and its M3 suffix ensures halogen-free compliance for consumer brand requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG30CA-E3/5B | Same electrical specs and SMBG package; RoHS-compliant but not halogen-free (E3 vs. M3). | Acceptable for industrial non-automotive use where halogen-free requirement is absent. | Select SMBG30CA-E3/5B if AEC-Q101 is unnecessary and cost optimization is prioritized over halogen-free status. |
| SMAJ30CA | Same VWM/VBR/VC ratings but in larger SMA (DO-214AC) package; lower thermal resistance (RθJA = 65 °C/W) but higher profile. | Better suited for high-reliability power supply inputs where PCB space permits larger footprint. | Choose SMAJ30CA when higher surge repetition rate or improved thermal dissipation is required, accepting larger board area. |
Compared with SMBG30CA-E3/5B and SMAJ30CA, the SMBG30CA-M3/5B uniquely combines AEC-Q101 qualification, halogen-free construction, and compact DO-215AA packaging-making it optimal for space-constrained, automotive-qualified designs requiring full regulatory alignment.
Availability
SMBG30CA-M3/5B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBG30CA-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 reliability, efficiency, and application-specific validation.
The SMBG series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and repeatable clamping performance are critical.
FAQ
What does the "CA" suffix indicate in SMBG30CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration: SMBG30CA-M3/5B contains two opposing avalanche diodes in a single SMBG package, enabling symmetrical clamping for both positive and negative voltage transients. This eliminates polarity concerns during placement and supports AC-coupled or floating signal lines-unlike unidirectional "A" variants that require correct cathode orientation. The SMBG30CA-M3/5B is functionally distinct from SMBG30A-M3/5B, which is unidirectional only.
Is SMBG30CA-M3/5B suitable for protecting 24 V industrial control systems?
Yes, SMBG30CA-M3/5B is well-suited for 24 V systems: its 30 V VWM provides adequate margin above nominal rail voltage, while its 48.4 V clamping voltage remains safely below typical 24 V system overvoltage thresholds (e.g., 60 V for IEC 61000-4-5). The device's 600 W rating handles common industrial surge events, and its –55 °C to +150 °C operating range supports wide ambient deployment. SMBG30CA-M3/5B has been validated in PLC I/O modules and motor drive feedback circuits.
How does the M3 suffix differ from E3 in SMBG30CA-M3/5B?
The M3 suffix indicates halogen-free, RoHS-compliant, industrial-grade construction meeting JESD 201 Class 2 whisker resistance, whereas E3 is RoHS-compliant but contains brominated flame retardants. Both share identical electrical specifications and SMBG packaging, but only M3 satisfies strict halogen-free mandates (e.g., IPC-4101D/126) and is qualified to AEC-Q101. SMBG30CA-M3/5B is specified for automotive and green-electronics applications where E3 would be noncompliant.
What is the recommended PCB pad layout for SMBG30CA-M3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for thermal and surge-current handling. The SMBG30CA-M3/5B datasheet (Fig. 2) shows derating curves based on this layout; smaller pads reduce peak pulse power capability. Pad design must accommodate DO-215AA gull-wing leads (0.038–0.058" pitch), and solder mask should fully expose pads to maximize thermal conduction. Use of internal ground planes and thermal vias beneath pads further enhances reliability during repetitive surges.
Does SMBG30CA-M3/5B meet IEC 61000-4-5 surge immunity standards?
SMBG30CA-M3/5B is rated for 600 W peak pulse power with a 10/1000 µs waveform-directly aligned with IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 kV line-to-line) test conditions when applied with appropriate series impedance. While the device itself is not "certified" to IEC 61000-4-5, its validated clamping performance (VC = 48.4 V at 12.4 A) ensures protected circuits remain within safe operating limits during standardized surges. System-level compliance requires proper layout and coordination with upstream impedance, but SMBG30CA-M3/5B is routinely deployed in IEC 61000-4-5-compliant industrial and automotive designs.
SMBG30CA-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):
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG30CA-M3/5B FAQ
1.How can I place an order for SMBG30CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG30CA-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 SMBG30CA-M3/5B reliable?
The price and inventory of SMBG30CA-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 SMBG30CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG30CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG30CA-M3/5B?
SMBG30CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG30CA-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 SMBG30CA-M3/5B?
For technical support, including SMBG30CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30CA-M3/5B requirements.
6.How does Aetrix verify that SMBG30CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG30CA-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 SMBG30CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG30CA-M3/5B?
All SMBG30CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30CA-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 SMBG30CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBG30CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG30CA-M3/5B Tags
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