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Vishay General Semiconductor - Diodes Division SMBJ24-E3/52
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- Part No.:
- SMBJ24-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24-E3/52.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,737
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Product details
Overview
SMBJ24-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ24-E3/52 datasheet, SMBJ24-E3/52 pinout, SMBJ24-E3/52 application, or SMBJ24-E3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant commercial-grade qualification, and real-world use context for ESD and inductive switching transient suppression.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM = 24 V, then avalanches rapidly above VBR (min 26.7 V) to divert transient energy away from downstream ICs or MOSFETs. Its low incremental surge resistance and sub-nanosecond response time ensure effective suppression of fast-rising transients from relay switching or lightning-induced surges.
Thermal design is constrained by RθJA = 100 °C/W (typical, on 0.2" × 0.2" copper pads) and TJ(max) = 150 °C, requiring layout-aware derating above 25 °C ambient per Figure 2. The device meets MSL Level 1 (JEDEC J-STD-020) and is rated for repetitive 0.01% duty cycle pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets upper limit for protected circuit's normal operating rail. |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction during ripple or tolerance drift. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected load under 600 W transient. |
| PPPM | 600 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing in industrial environments. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against accidental DC fault currents or latch-up events. |
| TJ(max) | 150 °C - Maximum junction temperature; enables operation in sealed enclosures or high-ambient industrial settings with appropriate PCB copper area. |
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. Polarity indicated by cathode band; anode and cathode terminals are axially oriented along the body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping | Connected to protected line's lower-potential side (e.g., ground or return path); critical for correct orientation in unidirectional configuration. |
| Cathode | Current exit point during clamping; marked with band | Connected to protected line's higher-potential side (e.g., 24 V rail); determines directionality and must match system polarity to avoid short-circuit failure. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial equipment up to Level 3. |
| Clamping voltage ≤ 38.9 V at 15.4 A | Ensures downstream 3.3 V/5 V logic or 24 V interface ICs remain within absolute maximum ratings during transient events. |
| Low incremental surge resistance | Minimizes VC overshoot and improves energy diversion efficiency during multi-pulse or high-dI/dt transients. |
| MSL Level 1, 260 °C reflow compatible | Enables standard SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental regulations and supports cost-sensitive volume production without halogen-free premium. |
Applications
| Industrial Motor Drive Control | PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting microcontroller GPIOs and optocoupler inputs from back-EMF spikes generated by 24 V solenoid valves and contactor coils. IC Role / Device Role / Timing Role: Shunt clamping element placed between input line and ground, triggered within <1 ns to clamp transients to ≤38.9 V. Use Value: Prevents latch-up or permanent damage to 3.3 V logic-level receivers while maintaining signal integrity during frequent coil switching cycles. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to field wiring surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each input channel, positioned upstream of series current-limiting resistor and Schmitt trigger buffer. Use Value: Enables reliable operation in factory-floor environments with >100,000 switching cycles/year and immunity to 1 kV/500 Ω IEC 61000-4-5 surges. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Rail Protection |
|
Use Scenario: Protecting LIN bus transceivers and window lift control ICs from load dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS on VBAT-referenced supply lines, selected for 24 V nominal rail compatibility and AEC-Q101-ready variant availability. Use Value: Provides fail-safe clamping margin above 13.5–14.5 V nominal battery voltage while surviving ISO 16750-2 pulse 5a (35 V, 200 ms). |
Use Scenario: Securing +24 V auxiliary rails in telecom base station power distribution units against lightning-induced surges entering via long cable runs. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary MOV/GDT protection, absorbing residual energy and limiting let-through voltage to <40 V. Use Value: Reduces risk of cascading failure in DC-DC converters and FPGA power sequencing circuits during outdoor site surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-E3/52 | Same electrical specs and package; identical marking code "BZ" and VBR range (26.7–29.5 V); differs only in ordering suffix convention (A vs. no letter). | No functional difference; used interchangeably in BOMs where legacy part numbering retains "A" suffix. | Select SMBJ24A-E3/52 if sourcing from distributors listing that exact P/N; electrically and mechanically identical to SMBJ24-E3/52. |
| SMCJ24A-E3/52 | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (33.6 A). | Used where higher surge endurance is required (e.g., outdoor telecom cabinets), but requires PCB footprint change and increased board space. | Choose SMCJ24A-E3/52 only when 600 W is insufficient; otherwise SMBJ24-E3/52 offers optimal size-to-performance ratio for space-constrained industrial PCBs. |
Compared with SMBJ24A-E3/52 (identical function, alternate suffix) and SMCJ24A-E3/52 (higher-power SMC variant), SMBJ24-E3/52 delivers certified 600 W transient suppression in the smallest standardized surface-mount TVS footprint suitable for automated placement on dense control boards.
Availability
SMBJ24-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, PLC digital input modules, automotive body control units, and telecom power supply rail protection requiring stable component supply across extended production lifecycles.
Supply support for SMBJ24-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, power efficiency, and application-specific validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure systems where robustness against inductive switching and lightning surges is mission-critical.
FAQ
What is the maximum clamping voltage of SMBJ24-E3/52 under a 10/1000 µs surge?
The SMBJ24-E3/52 has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) under the standardized 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 worst-case transient events. The SMBJ24-E3/52 maintains this clamping performance across its full operating temperature range when mounted per recommended pad layout.
Is SMBJ24-E3/52 suitable for bidirectional transient protection?
No, SMBJ24-E3/52 is a unidirectional TVS diode, identified by the absence of "CA" suffix and presence of cathode band marking. For bidirectional protection, Vishay specifies parts like SMBJ24CA-E3/52, which exhibit symmetrical clamping in both polarities. Using SMBJ24-E3/52 in reverse-biased configurations risks permanent breakdown or short-circuit failure. Always verify polarity alignment during PCB layout for SMBJ24-E3/52.
What is the thermal resistance and how does it affect SMBJ24-E3/52 layout?
The SMBJ24-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly impacts safe power dissipation: at 25 °C ambient, the 5.0 W steady-state power rating drops linearly above that temperature. To maintain reliability, PCB layout must replicate the specified pad dimensions and avoid thermal bottlenecks - undersized traces or isolated pads will cause premature thermal shutdown or parametric shift in SMBJ24-E3/52.
Does SMBJ24-E3/52 meet automotive qualification standards?
The standard SMBJ24-E3/52 is RoHS-compliant and qualified for commercial-grade operation, but not AEC-Q101 certified. For automotive applications, Vishay offers the variant SMBJ24HE3_X (e.g., SMBJ24HE3_B), which adds AEC-Q101 qualification while retaining identical electrical specs and SMB package. Engineers designing for automotive body electronics must specify the HE3 suffix version - SMBJ24-E3/52 alone does not satisfy automotive stress test requirements.
How does the 1 µA maximum reverse leakage at VWM impact low-power sensor circuits?
The SMBJ24-E3/52 exhibits ≤1 µA reverse leakage current at its 24 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal loading on high-impedance sensor bias networks or battery-powered monitoring circuits - for example, it adds less than 24 µW of quiescent power loss at 24 V, preserving signal accuracy and extending operational life in always-on industrial sensors. Leakage remains below 5 µA up to 125 °C per datasheet characterization.
SMBJ24-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 14A
- 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)
SMBJ24-E3/52 FAQ
1.How can I place an order for SMBJ24-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24-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 SMBJ24-E3/52 reliable?
The price and inventory of SMBJ24-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 SMBJ24-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ24-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24-E3/52?
SMBJ24-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24-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 SMBJ24-E3/52?
For technical support, including SMBJ24-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24-E3/52 requirements.
6.How does Aetrix verify that SMBJ24-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ24-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 SMBJ24-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ24-E3/52?
All SMBJ24-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24-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 SMBJ24-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ24-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24-E3/52 Tags
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