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Vishay General Semiconductor - Diodes Division SMBJ24CA-M3/5B
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- Part No.:
- SMBJ24CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CA-M3/5B.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,398
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Product details
Overview
SMBJ24CA-M3/5B from Vishay General Semiconductor is a bidirectional 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 range (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 sensor interfaces.
For engineers reviewing the SMBJ24CA-M3/5B datasheet, SMBJ24CA-M3/5B pinout, SMBJ24CA-M3/5B application, or SMBJ24CA-M3/5B equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.4), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping behavior for positive and negative transients without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while low incremental surge resistance minimizes voltage overshoot during ESD or lightning-induced surges.
The device is rated for repetitive 10/1000 µs pulses at 0.01% duty cycle and derates linearly above 25 °C ambient, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. It meets UL 497B recognition (QVGQ2) and is halogen-free per Vishay's M3 suffix specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Guaranteed conduction onset range; ensures reliable triggering across temperature and process variation. |
| VC (Clamping Voltage) | 38.9 V at IPPM = 15.4 A - Peak voltage seen by protected circuit during 600 W transient; determines safe IC stress level. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - Transient energy handling capacity; supports IEC 61000-4-5 Level 4 surge immunity when properly mounted. |
| IPPM (Peak Pulse Current) | 15.4 A - Maximum non-repetitive surge current the device safely shunts without degradation. |
| TJ max. | 150 °C - Maximum junction temperature; enables operation in industrial environments with adequate PCB copper thermal relief. |
| Package | SMB (DO-214AA) - Standardized 2-pin 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), bidirectional configuration with no polarity marking - both terminals are electrically symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path terminal | Both pins serve as bidirectional surge conduction paths; no cathode band or polarity identification required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM performance in both directions - eliminates need for orientation-aware layout or polarity-sensitive protection schemes. |
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 4 kV surge events on 50 Ω source impedance lines when mounted per recommended pad layout. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and JEDEC JESD201 Class 2 whisker resistance - suitable for green manufacturing and automotive supply chains. |
| MSL Level 1, 260 °C peak reflow | Allows unlimited floor life and standard lead-free reflow profiles without baking - reduces production line complexity and cost. |
| UL 497B recognized (QVGQ2) | Validated for use in telecom and industrial signal line protectors per Underwriters Laboratories safety standard - simplifies end-equipment certification. |
Applications
| Industrial Sensor Signal Lines | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: Protecting analog and digital I/O lines (e.g., CAN, LIN, analog sensor outputs) from load dump and inductive switching transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground to limit transient excursions below IC absolute maximum ratings. Use Value: Maintains signal integrity under 1 kV/µs fast-rising transients while adding <1 pF capacitance - avoids data corruption or false triggering in 100 kHz sensor sampling. |
Use Scenario: Safeguarding microcontroller GPIOs and interface receivers in body control modules exposed to ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail inputs and low-voltage signal returns to suppress battery line disturbances. Use Value: Withstands 100 A surge current (IFSM-equivalent) and clamps to ≤39 V - prevents latch-up or permanent damage to 5 V logic-level peripherals. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Feedback |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and DSL line drivers from lightning-induced surges and AC power cross-talk in outdoor telecom cabinets. IC Role / Device Role / Timing Role: First-stage transient suppressor placed upstream of gas discharge tube (GDT) or polymer PTC for coordinated protection. Use Value: Fast sub-nanosecond response captures initial surge edge before slower secondary protectors activate - reduces let-through energy by >60% versus GDT-only designs. |
Use Scenario: Guarding hall-effect sensor outputs and encoder feedback lines in washing machine and HVAC motor controllers subjected to brush-commutator noise. IC Role / Device Role / Timing Role: Localized TVS at sensor connector to absorb high-frequency ringing (up to 100 MHz) generated by PWM-driven BLDC inverters. Use Value: Low clamping ratio (VC/VBR = 1.40) limits voltage overshoot to <40 V - keeps 3.3 V microcontroller ADC inputs within safe operating area during 500 V surge tests. |
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-E3/5B | Same electrical specs and SMB package; RoHS-compliant but not halogen-free (E3 vs. M3). | Approved for commercial-grade industrial equipment where halogen-free requirement is not mandated. | Select when cost optimization is prioritized and halogen-free materials are not specified in BOM compliance documentation. |
| SMCJ24CA-M3 | Higher 1500 W peak pulse power, larger SMC (DO-214AB) package, same VWM/VBR/VC ratings. | Suitable for higher-energy surge environments (e.g., outdoor power supplies, solar inverters) requiring extended surge lifetime. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and PCB space allows larger footprint. |
Compared with SMBJ24CA-E3/5B, the SMBJ24CA-M3/5B adds halogen-free compliance without sacrificing clamping performance or thermal capability; versus SMCJ24CA-M3, it trades surge energy headroom for compact SMB footprint and lower parasitic inductance - critical for high-speed signal line protection.
Availability
SMBJ24CA-M3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom line protection, and consumer appliance motor control requiring stable component supply and full traceability.
Supply support for SMBJ24CA-M3/5B 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, precision, and application-specific optimization.
The SMBJ series targets board-level transient suppression in space-constrained, high-volume applications - engineered for automated assembly, consistent clamping, and long-term stability under thermal cycling and repetitive surge stress.
FAQ
What is the clamping voltage of SMBJ24CA-M3/5B at its rated peak pulse current?
The SMBJ24CA-M3/5B has a maximum clamping voltage (VC) of 38.9 V at its rated peak pulse current (IPPM) of 15.4 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet Document Number 88392, page 2. The SMBJ24CA-M3/5B maintains this clamping performance bidirectionally due to its symmetrical construction.
Is SMBJ24CA-M3/5B suitable for automotive applications?
The SMBJ24CA-M3/5B is halogen-free and RoHS-compliant but is not AEC-Q101 qualified - that qualification requires the HM3 suffix (e.g., SMBJ24CAHM3_B/I). While it may be used in non-safety-critical automotive subsystems, designers requiring formal automotive qualification must select the HM3 variant. The SMBJ24CA-M3/5B remains appropriate for industrial and telecom applications where AEC-Q101 is not mandated.
What is the thermal resistance of SMBJ24CA-M3/5B from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ24CA-M3/5B is 100 °C/W, measured under standard conditions with minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes natural convection and guides thermal design for sustained power dissipation up to 5.0 W. Derating curves in the Vishay datasheet show linear reduction above 25 °C ambient temperature.
Does SMBJ24CA-M3/5B have polarity markings on the package?
No, SMBJ24CA-M3/5B does not have polarity markings because it is a bidirectional TVS diode - both terminals are functionally identical and interchangeable. Unlike unidirectional variants (e.g., SMBJ24A), the CA suffix indicates symmetrical conduction, and the SMB (DO-214AA) case carries no cathode band. This simplifies PCB layout and eliminates orientation errors during automated placement.
What is the maximum operating junction temperature for SMBJ24CA-M3/5B?
The maximum operating junction temperature (TJ) for SMBJ24CA-M3/5B is +150 °C, as specified in the Vishay SMBJ5.0A–SMBJ188A datasheet (Document Number 88392, page 1). This rating enables reliable operation in harsh industrial environments, provided PCB thermal design maintains junction temperature within limit under worst-case power dissipation and ambient conditions. The SMBJ24CA-M3/5B also supports storage down to –55 °C.
SMBJ24CA-M3/5B 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-M3/5B FAQ
1.How can I place an order for SMBJ24CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CA-M3/5B 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-M3/5B reliable?
The price and inventory of SMBJ24CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ24CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CA-M3/5B?
SMBJ24CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CA-M3/5B 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-M3/5B?
For technical support, including SMBJ24CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ24CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ24CA-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ24CA-M3/5B?
All SMBJ24CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CA-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ24CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CA-M3/5B Tags
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