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Vishay General Semiconductor - Diodes Division SMBJ24A-E3/52
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- Part No.:
- SMBJ24A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24A-E3/52.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
SMBJ24A-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 24 V standoff voltage (VWM), 26.7–29.5 V breakdown range at 1 mA, and clamps transients to ≤38.9 V at 15.4 A peak pulse current (10/1000 µs), making it suitable for protecting MOSFET gates, microcontroller I/O lines, and sensor signal paths in industrial power supplies.
For engineers reviewing the SMBJ24A-E3/52 datasheet, SMBJ24A-E3/52 pinout, SMBJ24A-E3/52 application, or SMBJ24A-E3/52 equivalent, key selection criteria include its 600 W peak pulse power rating, low 1.0 µA max reverse leakage at VWM, 0.096 %/°C VBR temperature coefficient, and SMB (DO-214AA) package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, while the unidirectional polarity (cathode-banded) enables DC-biased line protection without forward conduction during normal operation.
The SMBJ24A-E3/52 is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), supports -55 °C to +150 °C operating junction temperature, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-reliability commercial PCB assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR @ IT = 1 mA | 26.7–29.5 V - Verified breakdown range ensuring predictable turn-on under ESD/lightning transients. |
| VC @ IPPM = 15.4 A | ≤38.9 V - Clamped voltage during 600 W 10/1000 µs surge; determines maximum stress on downstream ICs. |
| IPPM | 15.4 A - Peak pulse current capability at rated power; confirms survivability against IEC 61000-4-5 Level 4 surges. |
| Leakage @ VWM | ≤1.0 µA - Minimal loading on 24 V supply or signal lines during normal operation. |
| Package | SMB (DO-214AA) - Standardized 2-pin SMD outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height for high-density layouts. |
| TJ max | +150 °C - Enables use in thermally constrained environments like enclosed power converters or automotive under-hood modules. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-indicated by molded band. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during transient events. |
| Cathode | Protected line interface | Banded end connects to 24 V rail or signal line; conducts avalanche current into anode when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe industrial surges (e.g., IEC 61000-4-5 4 kV/2 Ω) without external series impedance. |
| Glass-passivated junction | Ensures long-term VBR stability and low leakage drift across temperature and lifetime cycling. |
| MSL Level 1 (260 °C peak) | Eliminates pre-bake requirements for standard reflow assembly, reducing manufacturing cost and process complexity. |
| RoHS-compliant, halogen-free option available | Supports environmental compliance for global OEM programs including EU RoHS and JEITA-MITI standards. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during fast transients, improving safety margin for 3.3 V or 5 V logic interfaces. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback sensing circuits from inductive kickback during MOSFET switching in 24 V BLDC motor controllers. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between gate driver output and MOSFET gate, referenced to local ground. Use Value: Limits gate-source voltage to ≤38.9 V during 15.4 A surge, preventing oxide breakdown in 40 V-rated Si MOSFETs. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN data line and VCC input, operating below 24 V system nominal. Use Value: Clamps 100 V/50 ms load dump spikes to <40 V within nanoseconds, preserving transceiver integrity without signal distortion. |
| Programmable Logic Controllers | Industrial IoT Sensor Nodes |
|
Use Scenario: Shielding 24 V digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end TVS on each optocoupler input leg, absorbing energy before isolation barrier. Use Value: Withstands repeated 600 W pulses while maintaining <1 µA leakage - no false triggering or signal attenuation. |
Use Scenario: Protecting RS-485 transceivers and analog sensor front-ends (e.g., 4–20 mA loops) in remote monitoring nodes exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; unidirectional SMBJ24A-E3/52 applied on powered signal rails with defined polarity. Use Value: Delivers 38.9 V clamping at 15.4 A with 0.096 %/°C tempco - critical for stable protection across -40 °C to +85 °C outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-E3/52 | Bidirectional version; symmetric VBR (26.7–29.5 V) in both polarities; same VC and PPPM. | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio inputs) where polarity reversal occurs. | Select SMBJ24CA-E3/52 only when bidirectional clamping is mandated by circuit topology - not a drop-in replacement for unidirectional use cases. |
| SMCJ24A-E3/52 | Larger SMC (DO-214AB) package; identical electrical specs but higher thermal mass and 1500 W PPPM rating. | Used where higher surge endurance or board-level thermal dissipation is needed (e.g., main power input vs. signal line). | Choose SMCJ24A-E3/52 when layout allows larger footprint and system-level surge testing exceeds 600 W requirements. |
Compared with SMBJ24CA-E3/52 and SMCJ24A-E3/52, the SMBJ24A-E3/52 provides optimal balance of compact SMB packaging, precise 24 V standoff, and verified 600 W clamping performance for space-constrained DC signal and power rail protection - without over-specifying size or cost.
Availability
SMBJ24A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and programmable logic controller I/O protection requiring stable component supply and full traceability.
Supply support for SMBJ24A-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 manufacturability.
The SMBJ series was engineered for high-volume SMT deployment in harsh environments, delivering consistent clamping performance across automotive, industrial, and telecom applications with strict thermal and surge compliance.
FAQ
What is the maximum clamping voltage of the SMBJ24A-E3/52 under a 10/1000 µs surge?
The SMBJ24A-E3/52 clamps to a maximum of 38.9 V when subjected to its rated 15.4 A peak pulse current (10/1000 µs waveform). This value is guaranteed per Vishay's datasheet (Document Number 88392, Rev. 09-Jan-2024) and represents the upper limit of voltage seen by protected circuitry during standardized surge events - critical for validating safe operating margins of downstream components like 3.3 V or 5 V logic ICs.
Is the SMBJ24A-E3/52 RoHS-compliant and lead-free?
Yes, the SMBJ24A-E3/52 carries the "E3" suffix, indicating full RoHS compliance and lead-free construction per Directive 2011/65/EU. Its matte tin-plated terminals meet J-STD-002 solderability requirements, and the molding compound complies with UL 94 V-0 flammability rating - confirmed in Vishay's official documentation and supported by Aetrix Electronics' material declarations.
Does the SMBJ24A-E3/52 have AEC-Q101 qualification?
No, the SMBJ24A-E3/52 is a commercial-grade part. AEC-Q101 qualified variants carry the "HE3" or "HM3" suffix (e.g., SMBJ24AHE3_B/H). The "E3" suffix denotes RoHS-compliant commercial grade only; automotive qualification requires explicit ordering code verification and is not applicable to SMBJ24A-E3/52.
What is the thermal resistance from junction to ambient for the SMBJ24A-E3/52?
The SMBJ24A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB layout and natural convection cooling - essential for calculating worst-case junction temperature rise under continuous power dissipation or repetitive surge conditions.
Can the SMBJ24A-E3/52 be used in bidirectional signal protection?
No - the SMBJ24A-E3/52 is strictly unidirectional, with polarity indicated by a cathode band. For bidirectional protection (e.g., AC lines, differential buses), the SMBJ24CA-E3/52 variant must be selected. Using SMBJ24A-E3/52 on bidirectional signals risks forward conduction and failure during negative excursions, as confirmed by Vishay's Electrical Characteristics table and polarity notes in Document 88392.
SMBJ24A-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SMBJ24A-E3/52 FAQ
1.How can I place an order for SMBJ24A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24A-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 SMBJ24A-E3/52 reliable?
The price and inventory of SMBJ24A-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 SMBJ24A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ24A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24A-E3/52?
SMBJ24A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24A-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 SMBJ24A-E3/52?
For technical support, including SMBJ24A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24A-E3/52 requirements.
6.How does Aetrix verify that SMBJ24A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ24A-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 SMBJ24A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ24A-E3/52?
All SMBJ24A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24A-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 SMBJ24A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ24A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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