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Vishay General Semiconductor - Diodes Division SMBJ30-E3/52
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- Part No.:
- SMBJ30-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30-E3/52.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,316
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Product details
Overview
SMBJ30-E3/52 from Vishay General Semiconductor is a unidirectional 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), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ30-E3/52 datasheet, SMBJ30-E3/52 pinout, SMBJ30-E3/52 application, or SMBJ30-E3/52 equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, 150 °C max junction temperature, and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal conditions it presents high impedance (>1 GΩ) up to 30 V, then avalanches sharply at ≥33.3 V to clamp transient energy into ground. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
It delivers 600 W peak pulse power handling with 0.01% duty cycle, derates linearly above 25 °C ambient (RθJA = 100 °C/W), and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak - enabling compatibility with standard SMT assembly processes without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected circuitry. |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage during 10/1000 µs transient; determines maximum stress imposed on downstream components. |
| IPPM | 12.4 A - Peak pulse current capability under standardized waveform; directly supports IEC 61000-4-5 Level 3 surge immunity. |
| PPPM | 600 W - Peak pulse power dissipation; enables robust protection against inductive switching spikes and lightning-induced surges. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in high-ambient industrial environments with appropriate PCB copper thermal relief. |
| Leakage @ VWM | 1.0 µA - Ultra-low reverse leakage ensures minimal standby power loss and no interference with high-impedance sensor bias networks. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band marking; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports EN 61000-4-5 surge testing up to 1 kV line-to-ground with 2 Ω source impedance. |
| 48.4 V clamping voltage at 12.4 A | Limits voltage stress on 3.3 V/5 V/24 V logic and power rails during transients, preserving component reliability. |
| Glass passivated junction | Ensures stable VBR tolerance (±5%) and long-term parameter consistency across temperature and life cycles. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without baking or special handling - reduces manufacturing overhead. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements while maintaining cost-effective performance for non-automotive applications. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Shunt clamping device placed between power rail and ground, activated within <1 ns of overvoltage event. Use Value: Prevents latch-up and permanent damage to 3.3 V MCU GPIOs and 12 V logic-level MOSFET drivers during 100 V/500 ns transients. |
Use Scenario: Input protection for LIN bus transceivers and CAN node power inputs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standby-mode voltage clamp that remains non-conductive until >33.3 V is detected, then diverts surge energy to chassis ground. Use Value: Maintains signal integrity on 12 V supply rails during 24 V/400 ms load dump events without affecting normal communication timing. |
| Telecom Power Supplies | Consumer Sensor Interfaces |
|
Use Scenario: Secondary-side DC output protection in AC/DC adapters and PoE injectors subject to lightning-induced surges on Ethernet or DC lines. IC Role / Device Role / Timing Role: Final-stage transient suppressor located immediately upstream of DC-DC converters and LDOs. Use Value: Limits output voltage excursion to ≤48.4 V during 600 W surges, preventing overvoltage shutdown or capacitor rupture in downstream regulation stages. |
Use Scenario: ESD and EFT protection for analog outputs of temperature/humidity sensors connected to microcontrollers via 0.1 mm pitch FPC cables. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) shunt element placed at connector entry point to absorb sub-100 ns HBM ESD pulses. Use Value: Provides ±15 kV contact / ±25 kV air-gap ESD immunity per IEC 61000-4-2 without distorting 10-bit ADC reference accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3_A | AEC-Q101 qualified, same VWM/VC/PPPM, but rated for automotive-grade temperature cycling and vibration. | Required for under-hood or battery-connected systems where qualification to automotive reliability standards is mandatory. | Select SMBJ30AHE3_A only if AEC-Q101 compliance is contractually required; otherwise SMBJ30-E3/52 offers identical electrical performance at lower cost. |
| SMCJ30A-E3/57 | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM and higher IPPM (33.3 A). | Suitable for higher-energy surge environments (e.g., AC mains input stages) where PCB space permits larger footprint. | Choose SMCJ30A-E3/57 when surge threat level exceeds 600 W or when thermal margin must be increased beyond SMB's RθJA = 100 °C/W. |
Compared with SMBJ30AHE3_A, SMBJ30-E3/52 lacks automotive qualification but matches all electrical specs and fits identical PCB land patterns; compared with SMCJ30A-E3/57, it trades peak power headroom for 40% smaller board area and lower thermal resistance to lead (RθJL = 20 °C/W vs. 15 °C/W).
Availability
SMBJ30-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and consumer sensor interfaces requiring stable component supply with full traceability and volume scalability.
Supply support for SMBJ30-E3/52 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, precision, and manufacturability.
The SMBJ series was developed for high-volume surface-mount transient suppression in cost-sensitive industrial and computing applications, balancing robust surge handling with automated assembly compatibility and tight parametric control.
FAQ
What is the maximum clamping voltage of the SMBJ30-E3/52 under standard test conditions?
The SMBJ30-E3/52 has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated 12.4 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured at TA = 25 °C with specified mounting conditions (0.2" × 0.2" copper pads), and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. The SMBJ30-E3/52 maintains this clamping performance across its full operating temperature range.
Does the SMBJ30-E3/52 meet RoHS and lead-free assembly requirements?
Yes, the SMBJ30-E3/52 carries the "E3" suffix, indicating full RoHS compliance and suitability for lead-free reflow soldering per J-STD-020 with a maximum peak temperature of 260 °C. Its matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, and it meets JESD 201 Class 2 whisker resistance. The SMBJ30-E3/52 is certified for use in commercial-grade applications without halogen restrictions.
How does the SMBJ30-E3/52 differ from bidirectional TVS diodes like SMBJ30CA?
The SMBJ30-E3/52 is unidirectional and functions only during reverse-biased overvoltage events, with cathode marked for correct orientation. In contrast, SMBJ30CA is bidirectional and clamps symmetrically in both polarities - making it suitable for AC signal lines or differential buses. The SMBJ30-E3/52 offers lower leakage (1.0 µA vs. 2.0 µA for SMBJ30CA) and is preferred for DC power rail protection where polarity is fixed and leakage sensitivity matters.
Can the SMBJ30-E3/52 be used in automotive applications?
The SMBJ30-E3/52 is rated for commercial temperature range (−55 °C to +150 °C) and is not AEC-Q101 qualified. For automotive applications requiring qualification, Vishay offers the SMBJ30AHE3_X variant (e.g., SMBJ30AHE3_A), which shares identical electrical parameters but undergoes extended reliability testing per AEC-Q101. The SMBJ30-E3/52 may be used in non-safety-critical automotive subsystems only if customer validation confirms sufficient robustness for the specific environment.
What is the thermal resistance from junction to ambient for the SMBJ30-E3/52?
The SMBJ30-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes still air convection and defines the temperature rise above ambient per watt of steady-state power dissipation. For pulsed operation, transient thermal impedance curves (Fig. 5 in datasheet) govern short-duration heating behavior - critical for evaluating survivability during 10/1000 µs surges.
SMBJ30-E3/52 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 11.2A
- 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 (SMBJ)
SMBJ30-E3/52 FAQ
1.How can I place an order for SMBJ30-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30-E3/52 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 SMBJ30-E3/52 reliable?
The price and inventory of SMBJ30-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ30-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30-E3/52?
SMBJ30-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30-E3/52 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 SMBJ30-E3/52?
For technical support, including SMBJ30-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30-E3/52 requirements.
6.How does Aetrix verify that SMBJ30-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ30-E3/52 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 SMBJ30-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ30-E3/52?
All SMBJ30-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30-E3/52, 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 SMBJ30-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ30-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30-E3/52 Tags
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