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Vishay General Semiconductor - Diodes Division SMBG30CAHE3/5B
- Part No.:
- SMBG30CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG30CAHE3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,529
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Product details
Overview
SMBG30CAHE3/5B 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 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 SMBG30CAHE3/5B datasheet, SMBG30CAHE3/5B pinout, SMBG30CAHE3/5B application, or SMBG30CAHE3/5B equivalent, this device is selected for high-reliability ESD and surge protection on power rails and signal lines where bidirectional clamping, low leakage (<1 µA at VWM), and stable junction temperature operation up to +150 °C are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, IPPM, and VC specifications in either direction. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance, enabling precise clamping during fast transients such as ISO 7637-2 pulses or IEC 61000-4-5 surges.
The SMBG30CAHE3/5B is rated for 600 W peak pulse power under 10/1000 µs waveform at 0.01 % duty cycle, with thermal resistance RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and maximum junction temperature of +150 °C - confirming suitability for under-hood automotive modules and industrial control interfaces exposed to repetitive surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage during 600 W surge; limits downstream IC stress to safe levels. |
| IPPM | 12.4 A - Peak pulse current supported under 10/1000 µs waveform; validates protection against common lightning-induced surges. |
| Leakage (ID) | <1 µA at 30 V - Ultra-low reverse leakage preserves battery life and signal integrity in always-on circuits. |
| TJ max | +150 °C - Enables deployment in engine control units, motor drives, and other high-ambient-temperature environments. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile gull-wing package with matte tin-plated leads; meets UL 94 V-0, J-STD-002 solderability, and JESD 201 Class 2 whisker resistance. No polarity marking on bidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity event) | Conducts surge current when voltage at this terminal falls >VBR below cathode potential. |
| Cathode | Transient current entry (positive polarity event) | Conducts surge current when voltage at this terminal rises >VBR above anode potential. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal paths. |
| 600 W peak pulse power | Validated under 10/1000 µs waveform - protects against severe transients per ISO 7637-2 Pulse 5a and IEC 61000-4-5 Level 4. |
| AEC-Q101 qualification | Includes HTOL, TC, HTRB, and ESD testing - assures long-term reliability in automotive powertrain and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.4) | 48.4 V / 33.3 V = 1.45 - minimizes overvoltage overshoot during clamping, reducing risk to downstream MOSFETs or microcontrollers. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles - supports automated SMT assembly without moisture sensitivity concerns. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rail to clamp positive and negative spikes before LDOs or DC-DC converters. Use Value: Withstands 600 W surges and operates up to +150 °C, ensuring uninterrupted function in under-hood modules. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector interface to shunt transients before signal conditioning amplifiers. Use Value: Sub-1 µA leakage preserves millivolt-level signal accuracy; bidirectional symmetry avoids polarity misplacement during assembly. |
| Telecom Line Interface Protection | Consumer USB Port Surge Suppression |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage on differential bus lines, coordinated with secondary GDT or polymer PTC. Use Value: 48.4 V clamping voltage aligns with 3.3 V/5 V transceiver absolute maximum ratings; AEC-Q101 grade adds field longevity. |
Use Scenario: Adding IEC 61000-4-2 Level 4 ESD immunity to USB 2.0 data lines and VBUS in portable devices. IC Role / Device Role / Timing Role: Fast-response TVS mounted directly at USB connector to divert 8 kV contact discharge before USB controller. Use Value: 12.4 A IPPM handles multi-kV ESD events; SMBG footprint enables compact placement without trace inductance penalty. |
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-E3/5B | Same VWM/VBR/VC, but lower PPPM (600 W vs. SMBJ's 600 W - identical rating); different package (SMB vs. SMBG) with slightly larger footprint and higher RθJA. | Less suitable for space-constrained automotive PCBs due to larger SMB (DO-214AA) outline and reduced thermal performance (RθJA = 110 °C/W). | Select SMBG30CAHE3/5B when board area and thermal efficiency are critical; choose SMBJ30CA-E3/5B only if legacy SMB footprint compatibility is required. |
| SMCJ30CAHE3/5B | Higher PPPM (1500 W), same VWM/VBR, but larger SMC (DO-214AB) package and higher clamping voltage (48.4 V vs. 49.9 V) - not a direct upgrade due to size and layout impact. | Used where higher surge energy absorption is needed (e.g., 48 V systems), but incompatible with SMBG land pattern and increases board cost. | Choose SMBG30CAHE3/5B for 12 V/24 V automotive and industrial applications requiring optimal size-to-power ratio; reserve SMCJ30CAHE3/5B for heavy-duty 48 V or PoE+ protection. |
Compared with SMBJ30CA-E3/5B and SMCJ30CAHE3/5B, SMBG30CAHE3/5B delivers identical 30 V bidirectional clamping and 600 W surge capability in the smallest qualified surface-mount TVS footprint (SMBG), enabling higher component density and better thermal management in automotive and industrial designs.
Availability
SMBG30CAHE3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line protection, and consumer USB port surge suppression requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBG30CAHE3/5B 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMBG series was developed specifically for high-density, high-reliability transient suppression in automotive and industrial environments - combining AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of SMBG30CAHE3/5B at its rated peak pulse current?
The SMBG30CAHE3/5B has a maximum clamping voltage (VC) of 48.4 V at its peak pulse current (IPPM) of 12.4 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe operating limits during surge events. The SMBG30CAHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG30CAHE3/5B suitable for automotive applications?
Yes, SMBG30CAHE3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with ambient temperatures up to +125 °C and junction temperatures up to +150 °C. Its construction - glass-passivated junction, matte tin leads, MSL Level 1 rating, and validation per HTOL, TC, and HTRB - confirms suitability for engine control units, body electronics, and ADAS sensor modules. The SMBG30CAHE3/5B meets automotive surge immunity standards including ISO 7637-2.
How does the bidirectional design of SMBG30CAHE3/5B affect circuit layout?
The SMBG30CAHE3/5B has no polarity marking and identical electrical characteristics in both directions, eliminating orientation constraints during placement. This simplifies PCB layout for AC-coupled signals, floating buses (e.g., CAN, RS-485), or dual-rail supplies where transient polarity is unpredictable. Unlike unidirectional TVS diodes, the SMBG30CAHE3/5B requires no cathode band alignment - reducing assembly errors and enabling automated optical inspection pass rates.
What is the maximum reverse leakage current of SMBG30CAHE3/5B at its stand-off voltage?
The SMBG30CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 30 V and TA = 25 °C. This ultra-low leakage ensures minimal power loss in battery-powered systems and prevents signal distortion in high-impedance sensor interfaces. Leakage remains below 5 µA even at +85 °C, supporting reliable operation across industrial temperature ranges.
Does SMBG30CAHE3/5B require derating at elevated ambient temperatures?
Yes, SMBG30CAHE3/5B must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number: 88456). At +85 °C ambient, its peak pulse power capability reduces to approximately 420 W (70 % of 600 W), and at +125 °C, it drops to ~240 W (40 %). Derating is based on thermal resistance RθJA = 100 °C/W with recommended 5.0 mm × 5.0 mm copper pads per terminal - critical for accurate surge handling in real-world automotive and industrial deployments.
SMBG30CAHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG30CAHE3/5B FAQ
1.How can I place an order for SMBG30CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG30CAHE3/5B 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 SMBG30CAHE3/5B reliable?
The price and inventory of SMBG30CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG30CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG30CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG30CAHE3/5B?
SMBG30CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG30CAHE3/5B 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 SMBG30CAHE3/5B?
For technical support, including SMBG30CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30CAHE3/5B requirements.
6.How does Aetrix verify that SMBG30CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG30CAHE3/5B 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 SMBG30CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG30CAHE3/5B?
All SMBG30CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30CAHE3/5B, 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 SMBG30CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG30CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG30CAHE3/5B Tags
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