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Vishay General Semiconductor - Diodes Division SMBJ30CAHE3_A/I
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- Part No.:
- SMBJ30CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CAHE3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
SMBJ30CAHE3_A/I 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 signal and power 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 - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ30CAHE3_A/I datasheet, SMBJ30CAHE3_A/I pinout, SMBJ30CAHE3_A/I application, or SMBJ30CAHE3_A/I equivalent, this AEC-Q101 qualified, RoHS-compliant bidirectional TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade ESD and lightning surge protection design validation.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its 33.3–36.8 V breakdown voltage range (VBR) at 1 mA test current ensures reliable triggering above 30 V stand-off while maintaining low leakage (<1.0 µA at VWM).
The SMBJ30CAHE3_A/I uses a glass-passivated silicon junction and achieves thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 150 °C maximum junction temperature and 0.099 %/°C VBR temperature coefficient support stable operation across extended industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - guaranteed breakdown threshold range for reliable transient detection |
| VC @ IPPM | 48.4 V at 12.4 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 600 W - peak pulse power handling capability under standardized surge waveform |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| MSL Level | Level 1 per J-STD-020 - supports lead-free reflow without baking or special handling |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Terminal 1) | Transient return path (bidirectional) | Shared terminal for both conduction directions; connects to protected line or ground reference |
| Anode (Terminal 2) | Transient return path (bidirectional) | Shared terminal opposite Cathode; forms symmetrical clamping junction with no polarity dependence |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TC, and ESD |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 50 Ω source impedance lines |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio suppressors |
| MSL Level 1 rating | Enables direct placement into lead-free reflow without pre-bake or dry-pack handling |
| Glass-passivated junction | Ensures long-term reliability and stable electrical characteristics under thermal cycling |
Applications
| Industrial Motor Control | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting gate drivers and microcontroller I/O lines from inductive kickback during relay and solenoid switching. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rails and signal traces to limit transient excursions. Use Value: Limits voltage spikes to ≤48.4 V during 12.4 A surges, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding LIN bus transceivers and sensor inputs against load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between LIN line and chassis ground to absorb bidirectional transients. Use Value: Maintains <1.0 µA leakage at 30 V, preserving bus bias stability while clamping 10/1000 µs surges to safe levels. |
| Telecom Power Supply Input | Consumer Appliance Sensor Interface |
Use Scenario: Secondary-side surge protection on 24 V DC input rails feeding PoE-powered equipment. IC Role / Device Role / Timing Role: Primary transient shunt device located upstream of DC-DC converters and LDOs. Use Value: Delivers 600 W pulse power handling with 100 °C/W thermal resistance, enabling compact layout without heatsinking. | Use Scenario: ESD protection for analog outputs of temperature/humidity sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on differential sensor lines referenced to system ground. Use Value: Provides sub-1 µA leakage and fast response to human-body-model (HBM) ESD pulses without distorting mV-level signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/52 | Same electrical specs; commercial-grade (non-AEC-Q101), RoHS-compliant, 7" tape/reel packaging | Lacks automotive qualification; suitable for industrial/commercial designs without AEC compliance mandates | Select when cost-sensitive non-automotive applications require identical clamping performance without qualification overhead |
| SAC30CA | Same VWM/VC ratings but in SMC (DO-214AB) package; 1000 W PPPM rating; higher thermal mass | Requires larger PCB footprint; better suited for higher-energy surge environments like AC mains input stages | Choose when system-level surge testing exceeds 600 W requirements or board layout allows larger SMC footprint |
Compared with SMBJ30CA-E3/52, the SMBJ30CAHE3_A/I adds AEC-Q101 qualification and MSL Level 1 compatibility for automotive use; versus SAC30CA, it trades higher pulse power for smaller SMB footprint and lower thermal resistance - optimizing space-constrained automotive modules.
Availability
SMBJ30CAHE3_A/I is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ30CAHE3_A/I 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 and application-specific performance.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory.
FAQ
What does the "HE3" suffix indicate in SMBJ30CAHE3_A/I?
The "HE3" suffix denotes that SMBJ30CAHE3_A/I is RoHS-compliant and AEC-Q101 qualified. The "H" indicates AEC-Q101 qualification, "E3" confirms RoHS compliance, and the "_A/I" specifies packaging: "A" is revision code, "I" denotes 13" tape-and-reel (3200 units). This distinguishes it from commercial-grade variants like SMBJ30CA-E3.
Is SMBJ30CAHE3_A/I unidirectional or bidirectional?
SMBJ30CAHE3_A/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping in both polarities, with identical breakdown and clamping characteristics for positive and negative transients - ideal for AC-coupled lines or differential buses where polarity reversal may occur.
What is the maximum clamping voltage for SMBJ30CAHE3_A/I under surge conditions?
The maximum clamping voltage (VC) for SMBJ30CAHE3_A/I is 48.4 V at 12.4 A peak pulse current (IPPM) using 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 worst-case transient events.
Does SMBJ30CAHE3_A/I require a heatsink in typical applications?
No, SMBJ30CAHE3_A/I does not require an external heatsink in typical applications. With a junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads and only 5.0 W steady-state power dissipation (PD), it safely handles transient energy without additional thermal management under normal PCB layout conditions.
How does SMBJ30CAHE3_A/I compare to SMAJ30CA in terms of surge capability?
SMBJ30CAHE3_A/I delivers 600 W peak pulse power, whereas SMAJ30CA (in smaller SMA package) is rated for 400 W. The larger SMB (DO-214AA) package of SMBJ30CAHE3_A/I enables higher surge current handling (12.4 A vs. ~8.3 A for SMAJ30CA) and lower clamping impedance - making SMBJ30CAHE3_A/I preferable for higher-energy transient environments.
SMBJ30CAHE3_A/I 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/I FAQ
1.How can I place an order for SMBJ30CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CAHE3_A/I 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/I reliable?
The price and inventory of SMBJ30CAHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMBJ30CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CAHE3_A/I?
SMBJ30CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CAHE3_A/I 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/I?
For technical support, including SMBJ30CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ30CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ30CAHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMBJ30CAHE3_A/I?
All SMBJ30CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CAHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMBJ30CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CAHE3_A/I Tags
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