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Vishay General Semiconductor - Diodes Division SMBJ30CAHE3_A/H
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- Part No.:
- SMBJ30CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CAHE3_A/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,250
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Product details
Overview
SMBJ30CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage at 12.4 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SMBJ30CAHE3_A/H datasheet, SMBJ30CAHE3_A/H pinout, SMBJ30CAHE3_A/H application, or SMBJ30CAHE3_A/H equivalent, this device is selected for robust ESD and lightning surge immunity in AEC-Q101-qualified systems where low clamping voltage, fast response (<1 ns), and bidirectional symmetry are critical to protect downstream MOSFETs, microcontrollers, and analog front-ends.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 33.3 V and 36.8 V at 1.0 mA test current. Its clamping behavior is defined under standardized 10/1000 μs surge conditions, delivering consistent VC ≤ 48.4 V up to IPPM = 12.4 A while maintaining low incremental surge resistance and thermal resistance of 20 °C/W junction-to-lead.
The device uses a glass-passivated silicon junction and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its AEC-Q101 qualification (denoted by HE3 suffix) confirms suitability for automotive powertrain and body electronics requiring extended temperature operation from –55 °C to +150 °C junction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's normal operating range. |
| VBR min / max | 33.3 V / 36.8 V at IT = 1.0 mA - Ensures reliable turn-on within narrow tolerance band during overvoltage events. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage seen by downstream ICs during worst-case 10/1000 μs surge; directly limits stress on protected components. |
| PPPM | 600 W - Peak transient energy absorption capability with 0.01% duty cycle; enables handling of IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 μA - Ultra-low reverse leakage ensures minimal standby power loss and no interference with high-impedance sensor signals. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative polarity transients; forms one side of symmetrical clamping path. |
| Cathode | Transient current entry (positive half-cycle) | Accepts reverse surge current during positive polarity transients; completes bidirectional clamping loop with anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor modules per stress test requirements. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 4th-level surge (4 kV line-earth, 2 kV line-line) without degradation when properly mounted. |
| Low clamping voltage (VC = 48.4 V) | Minimizes voltage overshoot across protected ICs - critical for 3.3 V/5 V logic and 12 V automotive MCU I/O pins. |
| Fast response time (<1 ns) | Activates before transient energy couples into sensitive circuitry, preventing latch-up or gate oxide damage in MOSFETs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (260 °C peak) without baking or special handling. |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 12 V/24 V system surges up to 100 Vpk while enabling AEC-Q101-compliant design without additional filtering. |
Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers against field-wiring induced transients and relay coil kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input optocoupler front-end, absorbing repetitive 10/1000 μs surges from inductive loads. Use Value: Eliminates need for series resistors or RC snubbers due to low dynamic impedance and stable clamping performance over 10⁵ surge cycles. |
| Telecom Line Protection | Consumer Power Adapter Output |
Use Scenario: Safeguarding Ethernet PHY interface and PoE controller inputs against lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) in hybrid protection scheme to handle residual fast-rising transients. Use Value: Provides sub-50 V clamping window aligned with IEEE 802.3af/at voltage tolerances, ensuring no data corruption during surge events. |
Use Scenario: Suppressing output voltage spikes caused by transformer leakage inductance and rectifier reverse recovery in AC/DC adapters. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across secondary-side DC output to clamp overshoot during load step changes. Use Value: Prevents overvoltage shutdown of USB-PD controllers and protects downstream capacitors rated at 35 V nominal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct substitution if halogen-free bill-of-materials is required; same thermal and electrical performance. |
| SMCJ30CAHE3_A/H | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Used where higher single-event surge margin is needed (e.g., outdoor telecom cabinets), accepting larger PCB area. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4; not drop-in due to different footprint and thermal mass. |
Compared with SMBJ30CAHE3_A/H, SMBJ30CAHM3_A/H offers identical protection performance with halogen-free construction, while SMCJ30CAHE3_A/H provides 2.5× higher pulse power in a physically larger package - selection depends on board space constraints, environmental compliance needs, and required surge margin.
Availability
SMBJ30CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input stages, and telecom line interface designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified reliability.
Supply support for SMBJ30CAHE3_A/H 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 and automotive-grade performance.
The SMBJ series delivers standardized transient suppression in compact surface-mount packages, engineered specifically for cost-sensitive yet mission-critical applications in automotive, industrial, and communications infrastructure.
FAQ
What is the clamping voltage of SMBJ30CAHE3_A/H at its rated peak pulse current?
The SMBJ30CAHE3_A/H has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 3.3 V, 5 V, and 12 V logic interfaces. The SMBJ30CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ30CAHE3_A/H suitable for automotive applications?
Yes, SMBJ30CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392. It operates from –55 °C to +150 °C junction temperature and passes stress tests including high-temperature reverse bias, temperature cycling, and unclamped inductive switching - making it appropriate for engine control modules, body electronics, and ADAS sensor nodes. The SMBJ30CAHE3_A/H meets automotive reliability requirements without derating.
How does the bidirectional configuration of SMBJ30CAHE3_A/H affect its use in circuit design?
The bidirectional configuration of SMBJ30CAHE3_A/H means it provides symmetrical clamping for both positive and negative polarity transients without requiring polarity awareness during placement - ideal for AC-coupled lines, differential buses like CAN, or ungrounded power rails. Unlike unidirectional variants, SMBJ30CAHE3_A/H has no cathode band marking and exhibits matched VBR (33.3–36.8 V) in both directions, simplifying layout and eliminating orientation errors in high-volume manufacturing.
What is the thermal resistance of SMBJ30CAHE3_A/H, and how does it impact PCB layout?
SMBJ30CAHE3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. To maintain safe operation under repetitive surges, PCB layout must provide adequate copper area per terminal - Vishay specifies minimum pad dimensions of 5.0 mm × 5.0 mm. Insufficient copper increases junction temperature, reducing surge endurance and potentially triggering thermal runaway during sustained overvoltage events. The SMBJ30CAHE3_A/H relies on proper thermal design for rated 600 W pulse handling.
Can SMBJ30CAHE3_A/H replace a unidirectional TVS like SMBJ30AHE3_A/H in existing designs?
No - SMBJ30CAHE3_A/H is bidirectional and lacks polarity marking, whereas SMBJ30AHE3_A/H is unidirectional with a cathode band and forward voltage drop (~3.5 V at 50 A). Substituting SMBJ30CAHE3_A/H for SMBJ30AHE3_A/H in DC circuits may cause unintended conduction during normal forward bias, leading to excessive leakage or latch-up. The SMBJ30CAHE3_A/H is only interchangeable where bidirectional clamping is explicitly required and circuit topology supports symmetrical protection - always verify with schematic review and SPICE simulation before replacement.
SMBJ30CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 (SMBJ)
SMBJ30CAHE3_A/H FAQ
1.How can I place an order for SMBJ30CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CAHE3_A/H 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 SMBJ30CAHE3_A/H reliable?
The price and inventory of SMBJ30CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ30CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CAHE3_A/H?
SMBJ30CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CAHE3_A/H 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 SMBJ30CAHE3_A/H?
For technical support, including SMBJ30CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ30CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ30CAHE3_A/H 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 SMBJ30CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ30CAHE3_A/H?
All SMBJ30CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CAHE3_A/H, 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 SMBJ30CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ30CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CAHE3_A/H Tags
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