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Vishay General Semiconductor - Diodes Division SMBJ24CA/54
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- Part No.:
- SMBJ24CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CA/54.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,847
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Product details
Overview
SMBJ24CA/54 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 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 a 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ24CA/54 datasheet, SMBJ24CA/54 pinout, SMBJ24CA/54 application, or SMBJ24CA/54 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.4), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on PCBs requiring robust transient immunity per IEC 61000-4-2/4-4/4-5.
Technical Context
This device operates as a voltage-clamping protection element in parallel with sensitive circuit nodes. Its bidirectional structure enables symmetrical suppression of positive and negative transients without polarity constraints, making it suitable for AC-coupled lines, differential buses, and ungrounded sensor outputs. The glass-passivated junction ensures stable leakage (<1 µA at 24 V) and repeatable breakdown behavior across temperature.
The SMBJ24CA/54 delivers 600 W surge handling under standardized 10/1000 µs pulses with <1 ns response time and low incremental surge resistance. Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and TJ(max) = +150 °C, supporting operation in industrial ambient environments up to +85 °C with appropriate layout derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events without premature leakage. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage seen by protected circuit during full-rated 600 W transient; limits stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power dissipation capability with 10/1000 µs waveform; validates surge immunity per IEC 61000-4-5 Level 3. |
| IPPM | 15.4 A - Peak pulse current corresponding to 600 W clamping; determines minimum trace width and layout thermal design. |
| TJ(max) | +150 °C - Maximum junction temperature; supports extended operation in enclosed industrial enclosures with limited airflow. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; connects to line being protected (e.g., RS-485 A or CAN_L). |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; connects to same line (bidirectional symmetry means both terminals function identically). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC or floating differential signals (e.g., USB D+/D−, RS-422) without external polarity management. |
| 600 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment up to Level 3 (1 kV line-to-earth, 2 kV line-to-line). |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile usage without baking, simplifying manufacturing for high-reliability production lines. |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter consistency across temperature and humidity stress conditions. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) I/O |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (CAN, LIN) in factory-floor pressure/temperature sensors exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected TVS diode providing instantaneous voltage clamping during sub-microsecond transients. Use Value: Prevents sensor IC reset or ADC saturation by limiting transient voltage to ≤38.9 V, maintaining signal integrity during 600 W inductive load switching events. |
Use Scenario: Safeguarding microcontroller GPIOs and transceiver inputs in BCM modules subjected to load dump and jump-start surges per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed at connector interface to shunt energy before reaching ASIC-level protection networks. Use Value: Withstands repetitive 15.4 A pulses without degradation, enabling compliance with automotive durability testing cycles while avoiding secondary failure modes. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Feedback |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller inputs from lightning-induced surges on outdoor telecom line cards. IC Role / Device Role / Timing Role: First-stage clamping device on RJ45 interface, working in coordination with GDTs and series impedance. Use Value: Fast <1 ns response captures initial surge edge before slower protectors activate, reducing let-through energy to <10 mJ at 38.9 V clamping level. |
Use Scenario: Securing hall-effect sensor outputs and current-sense amplifier inputs in smart washing machine motor control boards. IC Role / Device Role / Timing Role: Localized TVS adjacent to sensor IC pins to absorb commutation spikes from BLDC inverter switching. Use Value: Maintains VWM = 24 V margin above nominal 24 V supply rail, preventing false triggering while clamping 38.9 V peaks that would otherwise exceed sensor ABS MAX ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial-grade variant with "E3" suffix and 7″ tape/reel packaging. | No AEC-Q101 qualification; intended for non-automotive industrial/commercial use only. | Select when automotive qualification is unnecessary and cost-sensitive volume procurement favors standard E3 packaging. |
| SMBJ24CAHM3/5B | Halogen-free, RoHS-compliant, AEC-Q101 qualified; identical VWM, VBR, VC, and PPPM, but with HM3 suffix and 13″ tape/reel delivery. | Validated for automotive under-hood and body electronics per AEC-Q101; requires traceability documentation. | Choose for automotive programs requiring halogen-free materials and formal qualification evidence, especially for Tier 1 BOMs. |
Compared with SMBJ24CA/54, the E3 variant offers identical protection performance at lower qualification overhead, while the HM3 variant adds automotive-grade reliability and material compliance - neither is pin-compatible in the sense of shared part number suffix logic, but all share identical SMB footprint and electrical behavior.
Availability
SMBJ24CA/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line card surge protection, and consumer appliance motor feedback circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for SMBJ24CA/54 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive electronics, and communications infrastructure where robustness and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of SMBJ24CA/54 at its rated peak pulse current?
The SMBJ24CA/54 has a maximum clamping voltage (VC) of 38.9 V at its rated peak pulse current (IPPM) of 15.4 A, measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full 600 W transient event, and is confirmed in the Vishay SMBJ5.0A–SMBJ188A datasheet revision 09-Jan-2024, page 2.
Is SMBJ24CA/54 suitable for automotive applications?
SMBJ24CA/54 itself is not AEC-Q101 qualified; however, Vishay offers functionally identical variants such as SMBJ24CAHM3/5B that carry AEC-Q101 qualification. For automotive use, engineers must specify the HM3 or HE3 suffix versions - the SMBJ24CA/54 designation refers to a commercial-grade part with no automotive qualification data, though its electrical parameters match qualified variants.
What does the "/54" suffix indicate in SMBJ24CA/54?
The "/54" suffix in SMBJ24CA/54 denotes the preferred packaging option: 7″ diameter plastic tape and reel containing 750 units, per Vishay's ordering information table (document 88392, page 3). It does not affect electrical characteristics - SMBJ24CA/54 shares identical VWM, VBR, VC, and PPPM with SMBJ24CA-E3/52 and other SMBJ24CA variants.
How does SMBJ24CA/54 differ from unidirectional SMBJ24A?
SMBJ24CA/54 is bidirectional with symmetrical clamping for both polarities and no cathode band marking, whereas SMBJ24A is unidirectional with a visible cathode band and conducts only in reverse bias. Their VWM (24 V) and VBR ranges are identical, but SMBJ24A supports 100 A IFSM and exhibits forward voltage drop (VF ≤ 3.5 V at 50 A), which SMBJ24CA/54 does not specify due to its bidirectional architecture.
What is the thermal resistance of SMBJ24CA/54, and how does it impact layout?
SMBJ24CA/54 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 assumes minimal PCB copper; designers must increase pad area or add thermal vias if operating near 5.0 W steady-state dissipation or in ambient temperatures exceeding 70 °C to avoid exceeding the +150 °C TJ(max).
SMBJ24CA/54 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/54 FAQ
1.How can I place an order for SMBJ24CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CA/54 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/54 reliable?
The price and inventory of SMBJ24CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CA/54 is usually 5 days.
3.What payment methods are accepted for SMBJ24CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CA/54?
SMBJ24CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CA/54 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/54?
For technical support, including SMBJ24CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CA/54 requirements.
6.How does Aetrix verify that SMBJ24CA/54 is sourced from the original manufacturer or authorized distributors?
All SMBJ24CA/54 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/54 meets industry standards.
7.What is the process for return or replacement of SMBJ24CA/54?
All SMBJ24CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CA/54, 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/54 part is unused and in its original packaging.
Return procedure for SMBJ24CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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