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Vishay General Semiconductor - Diodes Division SMBJ24CA-E3/5B
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- Part No.:
- SMBJ24CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CA-E3/5B.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,855
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Product details
Overview
SMBJ24CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with a 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ24CA-E3/5B datasheet, SMBJ24CA-E3/5B pinout, SMBJ24CA-E3/5B application, or SMBJ24CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.62), MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified as 26.7–29.5 V at 1.0 mA test current. Its clamping behavior is defined under standardized 10/1000 µs surge conditions, delivering consistent transient suppression without polarity dependence.
Thermal performance is characterized by a junction-to-ambient thermal resistance (RθJA) of 100 °C/W and a maximum operating junction temperature of +150 °C. The device meets J-STD-020 MSL Level 1 and is RoHS-compliant per base P/N-E3 designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating range for protected circuitry. |
| VBR min/max | 26.7 V / 29.5 V at IT = 1.0 mA - Ensures reliable breakdown onset within tight tolerance for predictable transient response. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamping voltage during 10/1000 µs surge; limits downstream voltage stress to safe levels. |
| PPPM | 600 W - Peak pulse power handling capacity; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA - Ultra-low reverse leakage at rated stand-off voltage; minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Enables operation in high-temperature industrial environments without derating concerns. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with JEDEC-standard reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts surge current during negative-going transients; forms symmetrical conduction path with cathode. |
| Cathode | Transient current entry (positive polarity) | Accepts surge current during positive-going transients; enables bidirectional clamping without external circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity awareness. |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in industrial motor drives and telecom line interfaces. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to downstream ICs such as RS-485 transceivers or ADC front-ends. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; simplifies SMT production planning. |
| Glass passivated junction | Improves long-term reliability and stability under repeated surge stress versus epoxy-passivated alternatives. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLC modules exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point before signal conditioning amplifier. Use Value: Limits transient voltage to ≤38.9 V during 15.4 A surges, preserving 24 V sensor supply integrity and preventing op-amp latch-up. |
Use Scenario: Shielding RS-485 data lines in outdoor base station equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression device on differential bus lines, coordinated with common-mode chokes. Use Value: Clamps common-mode transients within 1 ns response time while maintaining <1.0 µA leakage at 24 V nominal line voltage. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding LIN bus communication lines in door module ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: AEC-Q101-qualified variant enabler (HE3 suffix available); used in conjunction with TVS arrays for multi-line protection. Use Value: Withstands repetitive 600 W surges at 0.01% duty cycle while operating up to +150 °C ambient in sealed enclosures. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Snubber-grade TVS mounted across motor terminals to absorb inductive kickback energy. Use Value: Dissipates 600 W peak energy without degradation, reducing EMI radiation and preventing microcontroller resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-M3/5B | Halogens-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit function or layout; selected where halogen-free BOM compliance is mandated. | Choose when environmental compliance requires halogen-free materials without altering design or qualification. |
| SAC24-TP | Same VWM (24 V) and VC (38.9 V), but in smaller SOD-123FL package (lower IPPM = 12.5 A, PPPM = 400 W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or high-current inductive switching. | Select only for space-constrained consumer applications where 400 W surge rating suffices and PCB area is critical. |
Compared with SMBJ24CA-E3/5B, the M3/5B offers identical protection performance with halogen-free construction, while SAC24-TP trades 33% lower surge capacity for 40% smaller footprint - making the original the preferred choice for industrial-grade reliability and full 600 W compliance.
Availability
SMBJ24CA-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for SMBJ24CA-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 and application-specific optimization.
The SMBJ series targets board-level transient suppression in harsh environments, engineered for high surge immunity, low clamping voltage, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of SMBJ24CA-E3/5B under a 10/1000 µs surge?
The SMBJ24CA-E3/5B clamps to a maximum of 38.9 V when subjected to its rated peak pulse current of 15.4 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components. The SMBJ24CA-E3/5B achieves this with a clamping ratio of 1.62, confirming effective transient suppression without excessive voltage overshoot.
Is SMBJ24CA-E3/5B suitable for bidirectional signal line protection?
Yes, SMBJ24CA-E3/5B is explicitly designed for bidirectional protection, as indicated by the "CA" suffix and confirmed in Vishay's documentation stating "electrical characteristics apply in both directions." It provides symmetrical clamping for AC-coupled or floating lines such as RS-485, CAN, or audio interfaces. The SMBJ24CA-E3/5B requires no polarity orientation during placement, simplifying layout and assembly.
Does SMBJ24CA-E3/5B meet automotive qualification standards?
The base SMBJ24CA-E3/5B is commercial-grade and RoHS-compliant, but not AEC-Q101 qualified. However, Vishay offers the automotive variant SMBJ24CAHE3_B/I with identical electrical specs and AEC-Q101 qualification. For designs requiring automotive-grade validation, that HE3-suffixed version must be specified - the SMBJ24CA-E3/5B itself is intended for industrial and telecom applications where AEC-Q101 is not mandated.
What is the thermal resistance and maximum junction temperature of SMBJ24CA-E3/5B?
The SMBJ24CA-E3/5B 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 Vishay's test condition. Its maximum operating junction temperature is +150 °C, enabling reliable operation in high-temperature environments such as enclosed industrial controllers. Derating curves in the SMBJ24CA-E3/5B datasheet show usable power dissipation down to +125 °C ambient without exceeding TJ max.
How does SMBJ24CA-E3/5B compare to unidirectional SMBJ24A-E3/5B?
The SMBJ24CA-E3/5B differs from the unidirectional SMBJ24A-E3/5B solely in polarity configuration: CA is bidirectional with no cathode band marking, while A is unidirectional with a visible cathode band. Electrically, both share identical VWM (24 V), VBR (26.7–29.5 V), and VC (38.9 V). The SMBJ24CA-E3/5B eliminates polarity concerns in AC or floating circuits, whereas SMBJ24A-E3/5B is used where directional surge paths are defined and cathode referencing is required.
SMBJ24CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ24CA-E3/5B FAQ
1.How can I place an order for SMBJ24CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CA-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 SMBJ24CA-E3/5B reliable?
The price and inventory of SMBJ24CA-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 SMBJ24CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ24CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CA-E3/5B?
SMBJ24CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CA-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 SMBJ24CA-E3/5B?
For technical support, including SMBJ24CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ24CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ24CA-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 SMBJ24CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ24CA-E3/5B?
All SMBJ24CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CA-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 SMBJ24CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ24CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CA-E3/5B Tags
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