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Vishay General Semiconductor - Diodes Division SMBJ24C-E3/5B
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- Part No.:
- SMBJ24C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24C-E3/5B.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,547
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Product details
Overview
SMBJ24C-E3/5B 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 standoff 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 and automotive ECUs.
For engineers reviewing the SMBJ24C-E3/5B datasheet, SMBJ24C-E3/5B pinout, SMBJ24C-E3/5B application, or SMBJ24C-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and direct alternatives qualified for industrial-grade surge immunity design.
Technical Context
The SMBJ24C-E3/5B operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR ≥26.7 V and limits transient energy to ≤38.9 V at 15.4 A, enabling reliable protection of 24 V DC systems against ISO 7637-2 pulse 1/2a/5a and IEC 61000-4-5 surges.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), with junction temperature rated from –55 °C to +150 °C. The device meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
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 24 V rail protection without false triggering. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown range ensures consistent turn-on across production lots; guarantees suppression activation above nominal rail. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during 10/1000 µs surge; keeps downstream ICs (e.g., MCU GPIO, CAN transceivers) below absolute max ratings. |
| PPPM | 600 W - Peak pulse power handling capability; sustains single 10/1000 µs transients up to 15.4 A without failure. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against high-energy inductive kickback events. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and standard reflow profiles. |
Pinout & Package
SMBJ24C-E3/5B uses the SMB (DO-214AA) package: 2-terminal, unidirectional configuration with cathode marked by a band on the body. 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 return path; establishes reference for clamping action when cathode is tied to protected line. |
| Cathode | Protected line input terminal | Connected to 24 V supply or signal line; conducts avalanche current to anode during overvoltage, limiting voltage rise to ≤38.9 V. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-event suppression of high-energy transients common in 24 V industrial control buses without thermal runaway. |
| Clamping voltage ≤38.9 V at 15.4 A | Keeps protected 3.3 V/5 V logic interfaces within safe operating area during ISO 7637-2 Pulse 5a (500 V/2 Ω) tests. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure (MSL Level 1). |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and supports lead-free reflow up to 260 °C peak without degradation. |
| Low profile SMB package | Reduces PCB real estate vs. SMA/SMB variants; maintains mechanical robustness for vibration-prone environments like transportation electronics. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC power inputs feeding gate drivers and current-sense amplifiers in servo inverters. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 24 V rail and chassis ground, clamping load-dump spikes and relay coil flyback. Use Value: Limits transient voltage to ≤38.9 V, preventing latch-up or permanent damage to isolated gate drivers (e.g., Si823x) and shunt-based current monitors. |
Use Scenario: Surge suppression on LIN bus lines and power supply inputs in door module ECUs exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Standoff-rated TVS connected from LIN signal line to ground, activated only during >26.7 V events (e.g., ISO 7637-2 Pulse 1). Use Value: Maintains signal integrity below 38.9 V clamping level, ensuring LIN transceiver (e.g., TLE7259) remains functional after repeated 100 V/50 Ω pulses. |
| Telecom Power Supplies | Factory Automation I/O Modules |
|
Use Scenario: Input-stage protection for 24 V auxiliary supplies powering PoE midspans and remote PHY controllers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input, coordinated with upstream fuse and downstream π-filter to meet EN 61000-4-5 Level 4. Use Value: Absorbs 600 W surge energy without degradation, preserving hold-up capacitance and avoiding brownout-induced firmware resets. |
Use Scenario: Signal line protection for digital input channels receiving 24 V dry-contact signals from PLC sensors and limit switches. IC Role / Device Role / Timing Role: Fast-acting TVS on each input channel, placed before optocoupler input to prevent LED overvoltage during field-wiring faults. Use Value: Sub-1 ns response ensures clamping occurs before optocoupler CTR degrades, maintaining noise immunity and channel isolation integrity. |
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-E3/5B | Same VWM (24 V), identical VBR (26.7–29.5 V), identical VC (38.9 V), same SMB package and RoHS/E3 compliance. | No functional difference; SMBJ24A-E3/5B is the standard unidirectional marking for this variant - SMBJ24C-E3/5B is not a documented part number in Vishay's official ordering matrix. | Select SMBJ24A-E3/5B for guaranteed availability and full documentation traceability; verify marking code "LZ" on reel packaging matches datasheet Table 1. |
| SMAJ24A-E3/52 | Lower peak pulse power (400 W vs. 600 W), smaller SMA (DO-214AC) package (4.57 mm × 2.92 mm), higher RθJA (~140 °C/W), same VWM/VBR/VC. | Suitable for space-constrained designs with lower surge threat levels (e.g., IEC 61000-4-4 Level 3), but not recommended for ISO 7637-2 Pulse 5a or high-repetition industrial environments. | Choose SMAJ24A-E3/52 only if board area is critical and surge energy is limited to ≤400 W; confirm thermal margin with RθJA-based derating curves. |
Compared with SMBJ24C-E3/5B, SMBJ24A-E3/5B offers identical electrical and thermal specs with full documentation support, while SMAJ24A-E3/52 trades 33 % pulse power headroom and higher thermal resistance for 30 % smaller footprint - requiring explicit validation of surge energy and thermal dissipation in final layout.
Availability
SMBJ24C-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and factory automation I/O modules requiring stable component supply, long-lifecycle sourcing, and RoHS-compliant surge protection.
Supply support for SMBJ24C-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, power efficiency, and AEC-Q qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting 12 V/24 V automotive, industrial, and telecom systems where robustness against load dump, ESD, and lightning-induced surges is mission-critical.
FAQ
What is the standoff voltage rating of SMBJ24C-E3/5B?
The SMBJ24C-E3/5B has a maximum reverse standoff voltage (VWM) of 24 V. This means it remains non-conductive under normal 24 V DC operation, with reverse leakage current held to ≤1 µA at this voltage. This rating ensures no interference with circuit functionality during steady-state conditions while allowing rapid avalanche conduction during overvoltage events exceeding 26.7 V.
Does SMBJ24C-E3/5B meet automotive qualification standards?
The SMBJ24C-E3/5B itself is a commercial-grade (E3) variant and is not AEC-Q101 qualified. However, Vishay offers the AEC-Q101-qualified version as SMBJ24AHE3_B/I (with HE3 suffix). For automotive applications requiring qualification, SMBJ24AHE3_B/I must be specified - it shares identical VWM, VBR, and VC specs but adds stress testing per AEC-Q101 Rev D.
What is the clamping voltage of SMBJ24C-E3/5B at its rated surge current?
The SMBJ24C-E3/5B clamps to a maximum of 38.9 V at its peak pulse current (IPPM) of 15.4 A, measured with a 10/1000 µs waveform. This clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components - such as 3.3 V microcontrollers or 5 V interface ICs - remain within their absolute maximum ratings.
Can SMBJ24C-E3/5B be used in bidirectional configurations?
No - SMBJ24C-E3/5B is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). Bidirectional operation requires the "CA" variant (e.g., SMBJ24CA-E3/5B), which has symmetrical breakdown in both polarities. Using SMBJ24C-E3/5B in AC or floating signal paths risks reverse conduction failure; always match suffix to system polarity requirements.
What is the thermal resistance of SMBJ24C-E3/5B from junction to ambient?
The SMBJ24C-E3/5B 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 is essential for calculating junction temperature rise under sustained power dissipation and must be applied with derating curves from Figure 2 of the datasheet for operation above 25 °C ambient.
SMBJ24C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ24C-E3/5B FAQ
1.How can I place an order for SMBJ24C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24C-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 SMBJ24C-E3/5B reliable?
The price and inventory of SMBJ24C-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 SMBJ24C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ24C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24C-E3/5B?
SMBJ24C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24C-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 SMBJ24C-E3/5B?
For technical support, including SMBJ24C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24C-E3/5B requirements.
6.How does Aetrix verify that SMBJ24C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ24C-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 SMBJ24C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ24C-E3/5B?
All SMBJ24C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24C-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 SMBJ24C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ24C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24C-E3/5B Tags
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