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Vishay General Semiconductor - Diodes Division SMBJ30A-E3/52
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- Part No.:
- SMBJ30A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30A-E3/52.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,368
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Product details
Overview
SMBJ30A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 30 V standoff voltage (VWM), 33.3–36.8 V breakdown range at 1 mA, clamps transients to ≤48.4 V at 12.4 A peak pulse current (10/1000 µs), and delivers 600 W peak pulse power - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ30A-E3/52 datasheet, SMBJ30A-E3/52 pinout, SMBJ30A-E3/52 application, or SMBJ30A-E3/52 equivalent, key selection criteria include its unidirectional polarity, SMB (DO-214AA) package thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification eligibility, and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), while the low incremental surge resistance enables effective energy diversion during ESD or lightning-induced transients.
The SMBJ30A-E3/52 is rated for -55 °C to +150 °C junction temperature, supports 100 A non-repetitive forward surge (8.3 ms half-sine), and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-reliability automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on under transient stress. |
| VC @ IPPM | ≤48.4 V at 12.4 A - Clamped voltage during 600 W 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; validates protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-line). |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports protection of MOSFET gate drivers and DC bus inputs. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| Package | SMB (DO-214AA) - Low-profile SMT outline with cathode band marking; compatible with JEDEC-standard pick-and-place and reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode indicated by molded band. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; establishes reference for clamping action during overvoltage events. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 24 V rail or CAN_H); conducts surge current to anode when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe industrial surges without cascaded TVS or external current limiting. |
| Clamping voltage ≤48.4 V at 12.4 A | Ensures protected 3.3 V/5 V logic interfaces remain within absolute maximum ratings during transient events. |
| Glass passivated junction | Delivers stable leakage (<1.0 µA at 30 V) and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-bake requirements and supports standard lead-free reflow processes in high-volume manufacturing. |
| AEC-Q101 qualification option | Enables drop-in use in automotive applications (e.g., body control modules) when ordered with HE3 suffix. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC bus inputs against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage excursions to ≤48.4 V, preventing latch-up or permanent damage to 40 V-rated power management ICs. |
Use Scenario: Surge suppression on LIN bus lines exposed to load dump and battery reversal conditions in door module PCBs. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN signal and chassis ground to absorb ESD and ISO 7637-2 pulses. Use Value: Maintains signal integrity with <1.0 µA leakage at 12 V, avoiding false wake-up or communication timeout in low-power sleep mode. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection for AC/DC adapters subjected to lightning-induced surges on primary-side rectifier outputs. IC Role / Device Role / Timing Role: Parallel-connected TVS on bulk capacitor terminals to divert 600 W transients away from PWM controllers and optocouplers. Use Value: Achieves UL 497B recognition for protector classification, supporting safety certification of end equipment. |
Use Scenario: Overvoltage safeguard for microcontroller I/O pins tied to front-panel buttons and LED drivers in washing machine UI boards. IC Role / Device Role / Timing Role: Localized TVS per I/O line to suppress ESD from user contact and relay cross-talk. Use Value: Fast <1 ns response prevents logic upset or register corruption during 8 kV contact discharge events. |
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-E3/52 | Bidirectional variant; symmetric breakdown (±33.3–36.8 V); no polarity marking. | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN) where reverse polarity surges occur. | Select SMBJ30CA-E3/52 only when bidirectional clamping is mandated by signal topology or standards like ISO 11898. |
| SMCJ30A-E3/52 | Same VWM/VBR, but larger SMC (DO-214AB) package; higher PPPM = 1500 W; RθJA = 35 °C/W. | Used where higher surge energy absorption or lower thermal resistance is required (e.g., outdoor telecom enclosures). | Choose SMCJ30A-E3/52 only if system-level testing confirms need for >600 W rating or improved thermal performance on limited copper area. |
Compared with SMBJ30A-E3/52, SMBJ30CA-E3/52 adds bidirectional symmetry at the cost of polarity-aware layout flexibility, while SMCJ30A-E3/52 trades compact SMB footprint for 2.5× higher surge capacity and better thermal dissipation - neither is pin-compatible, requiring PCB redesign.
Availability
SMBJ30A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, RoHS-compliant sourcing, and traceable lot documentation.
Supply support for SMBJ30A-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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series was engineered for high-energy transient suppression in space-constrained SMT designs, targeting industrial automation, automotive electronics, and infrastructure equipment where robustness and standardized packaging are critical.
FAQ
What is the maximum clamping voltage of SMBJ30A-E3/52 under a 10/1000 µs surge?
The SMBJ30A-E3/52 clamps to a maximum of 48.4 V when subjected to its rated 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 downstream ICs remain within their absolute maximum ratings.
Is SMBJ30A-E3/52 suitable for automotive applications?
SMBJ30A-E3/52 itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under the HE3 suffix (e.g., SMBJ30AHE3_B/H). For automotive use, specify the HE3 variant to ensure qualification for temperature cycling, humidity, and mechanical shock per AEC-Q101 - the SMBJ30A-E3/52 alone does not carry this qualification.
What does the "/52" in SMBJ30A-E3/52 indicate?
The "/52" in SMBJ30A-E3/52 denotes the preferred package code for 7" diameter plastic tape-and-reel delivery, containing 750 units per reel. This packaging format is optimized for high-speed SMT placement equipment and aligns with industry-standard reel dimensions and orientation requirements for automated assembly lines.
How does SMBJ30A-E3/52 differ from SMBJ30CA-E3/52?
SMBJ30A-E3/52 is unidirectional with cathode band marking and asymmetric conduction (conducts only in reverse bias), whereas SMBJ30CA-E3/52 is bidirectional with identical breakdown in both directions and no polarity marking. The latter is required for AC signal lines or differential buses like CAN or RS-485, while SMBJ30A-E3/52 suits DC power rails and single-ended I/O protection.
What is the thermal resistance of SMBJ30A-E3/52, and how does it affect derating?
The SMBJ30A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value requires power derating above 25 °C ambient - for example, at 85 °C ambient, maximum continuous power dissipation drops to ~3.0 W - ensuring safe operation within the -55 °C to +150 °C junction temperature range.
SMBJ30A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ30A-E3/52 FAQ
1.How can I place an order for SMBJ30A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30A-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 SMBJ30A-E3/52 reliable?
The price and inventory of SMBJ30A-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 SMBJ30A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ30A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30A-E3/52?
SMBJ30A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30A-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 SMBJ30A-E3/52?
For technical support, including SMBJ30A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30A-E3/52 requirements.
6.How does Aetrix verify that SMBJ30A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ30A-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 SMBJ30A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ30A-E3/52?
All SMBJ30A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30A-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 SMBJ30A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ30A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30A-E3/52 Tags
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