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Vishay General Semiconductor - Diodes Division SMBJ30-E3/5B
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- Part No.:
- SMBJ30-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30-E3/5B.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,166
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Product details
Overview
SMBJ30-E3/5B 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-E3/5B datasheet, SMBJ30-E3/5B pinout, SMBJ30-E3/5B application, or SMBJ30-E3/5B equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamping protection device that remains high-impedance below VWM = 30 V and rapidly transitions to low-impedance conduction above VBR = 33.3–36.8 V to divert transient energy. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), while the SMB package provides thermal resistance of RθJA = 100 °C/W and RθJL = 20 °C/W.
The device meets MSL level 1 per J-STD-020 with 260 °C reflow peak, supports 100 A non-repetitive forward surge (IFSM), and delivers consistent clamping performance across -55 °C to +150 °C junction temperature range - enabling reliable operation in automotive-grade and industrial environments where ESD and inductive switching surges occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V DC systems. |
| VBR @ IT = 1 mA | 33.3–36.8 V - verified breakdown threshold ensuring predictable turn-on during transients without premature conduction. |
| VC @ IPPM = 12.4 A | 48.4 V - clamped voltage under 600 W 10/1000 µs surge; limits downstream component stress to safe levels. |
| IPPM | 12.4 A - peak pulse current capability at rated power; determines minimum trace width and PCB copper pad sizing. |
| PPPM | 600 W - transient energy handling capacity with 0.01% duty cycle; validates suitability for repetitive load-switching events. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V bus lines. |
| 48.4 V clamping voltage at 12.4 A | Limits voltage overshoot to <1.6× VWM, safeguarding 3.3 V/5 V logic and 40 V-rated MOSFETs. |
| Glass passivated junction | Ensures stable avalanche behavior over lifetime and temperature, critical for long-term reliability in industrial controls. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow without moisture-related popcorning or delamination. |
| RoHS-compliant, halogen-free option available | Meets EU RoHS Directive 2011/65/EU and IPC-1752A material declaration requirements. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MCU GPIO and external switch node to clamp negative transients and prevent latch-up. Use Value: Limits transient voltage to ≤48.4 V, preserving 5 V tolerant I/O integrity and eliminating need for series resistors or RC snubbers. |
Use Scenario: Input line protection for LIN bus transceivers and door lock actuators exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated clamping device on 12 V supply rail upstream of LDO regulators and CAN/LIN interface ICs. Use Value: Withstands 100 A surge (IFSM) and maintains VC ≤48.4 V, preventing regulator shutdown and communication dropout during battery transients. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Secondary-side DC output protection in AC/DC adapters powering PoE injectors and base station radios. IC Role / Device Role / Timing Role: Parallel-connected TVS on +24 V or +48 V output rails to absorb coupling noise from adjacent switching converters. Use Value: 600 W rating handles coupled 10/1000 µs surges without degradation; 1.0 µA leakage avoids standby current penalty. |
Use Scenario: Surge suppression on user-interface buttons, display backlight drivers, and hall-effect sensor inputs in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Localized clamping element mounted directly at connector entry points to intercept ESD and contact discharge events. Use Value: Fast <1 ns response captures human-body-model (HBM) ESD pulses before they propagate into MCU pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy. | Choose SMBJ30A-M3/5B for green manufacturing programs requiring IPC-1752A halogen statement. |
| SMBJ30CA-E3/5B | Bidirectional version with same VWM = 30 V but symmetrical clamping in both polarities; VBR min/max tighter (33.3–36.8 V each direction). | Required for AC-coupled or floating signal lines (e.g., RS-485, audio inputs) where polarity reversal occurs. | Select SMBJ30CA-E3/5B only when protecting bidirectional data lines or transformer-coupled circuits. |
Compared with SMBJ30A-M3/5B, SMBJ30-E3/5B offers identical protection performance with standard RoHS compliance; versus SMBJ30CA-E3/5B, it provides lower cost and simpler layout for unidirectional DC rails but cannot suppress negative-going transients on AC paths.
Availability
SMBJ30-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ30-E3/5B 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SMBJ series targets board-level transient suppression in harsh environments, delivering high-power clamping in compact surface-mount packages for automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of SMBJ30-E3/5B under a 600 W transient?
The SMBJ30-E3/5B has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current, corresponding to the 600 W 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ30-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ30-E3/5B suitable for automotive applications?
SMBJ30-E3/5B is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ30HE3 variant (AEC-Q101 qualified, suffix HE3). The SMBJ30-E3/5B may be used in non-safety-critical aftermarket or infotainment subsystems where qualification is not mandated, but SMBJ30-E3/5B must not be substituted in safety-relevant ECUs without validation.
What does the "-E3/5B" suffix indicate in SMBJ30-E3/5B?
The "-E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/5B" specifies packaging in 13-inch diameter plastic tape and reel containing 3200 units. This format ensures compatibility with high-speed pick-and-place equipment and supports JIT manufacturing flow. The SMBJ30-E3/5B ordering code aligns with Vishay's standardized delivery mode nomenclature in document 88392.
How does SMBJ30-E3/5B compare to SMAJ30A in terms of power handling?
SMBJ30-E3/5B delivers 600 W peak pulse power (10/1000 µs), whereas SMAJ30A is rated for 400 W under the same waveform. The larger SMB package of SMBJ30-E3/5B provides lower thermal resistance (RθJA = 100 °C/W vs. SMAJ's ~130 °C/W), enabling higher sustained surge capability and better derating above 25 °C ambient. SMBJ30-E3/5B is preferred where higher energy transients are expected.
Can SMBJ30-E3/5B be used in bidirectional signal protection?
No - SMBJ30-E3/5B is unidirectional and conducts only when cathode voltage exceeds anode by >VBR. For bidirectional protection (e.g., RS-485, USB D+/D−), the SMBJ30CA-E3/5B variant must be used. Attempting to use SMBJ30-E3/5B on AC or floating lines results in forward conduction during negative half-cycles, potentially damaging the device or circuit. Always match polarity to application topology.
SMBJ30-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBJ30-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30-E3/5B 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 SMBJ30-E3/5B reliable?
The price and inventory of SMBJ30-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ30-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30-E3/5B?
SMBJ30-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30-E3/5B 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 SMBJ30-E3/5B?
For technical support, including SMBJ30-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30-E3/5B requirements.
6.How does Aetrix verify that SMBJ30-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ30-E3/5B 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 SMBJ30-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ30-E3/5B?
All SMBJ30-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30-E3/5B, 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 SMBJ30-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ30-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30-E3/5B Tags
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