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Vishay General Semiconductor - Diodes Division SMB8J24CA-M3/5B
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- Part No.:
- SMB8J24CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CA-M3/5B.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,348
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Product details
Overview
SMB8J24CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.9 V clamping voltage (VC) at 20.6 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J24CA-M3/5B datasheet, SMB8J24CA-M3/5B pinout, SMB8J24CA-M3/5B application, or SMB8J24CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), and compatibility with 0.2" × 0.2" copper pad layout per JEDEC standards.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at VWM), while the bidirectional symmetry enables symmetric clamping on AC-coupled or differential lines without polarity constraints.
The device is rated for TJ = –55 °C to +150 °C operation and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Thermal resistance is RθJA = 72 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting reliable power dissipation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 26.7 V / 29.5 V at IT = 1.0 mA - tight breakdown window ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 38.9 V at 20.6 A (10/1000 µs) - clamping voltage limits downstream IC stress during 800 W surge events. |
| PPPM | 800 W - peak pulse power rating determines survivability against lightning-induced surges (IEC 61000-4-5 Level 3/4). |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | +150 °C - supports under-hood automotive environments and high-ambient industrial control cabinets. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band not marked (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient path | No polarity marking required; either terminal serves as input/output for AC or differential line protection. |
| Case (body) | Thermal and mechanical interface | Direct thermal path to PCB copper pads; requires 5.0 mm × 5.0 mm minimum pad area per terminal for rated PPPM. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled buses (e.g., CAN FD, RS-485) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Halogen-free & RoHS-compliant (M3) | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance for long-term solder joint reliability. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic interfacing with 24 V supply domains. |
| MSL Level 1 rating | Allows standard SMT reflow without dry-pack or baking; compatible with high-volume automated assembly. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensor outputs in engine compartments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp surges before reaching ASIC inputs. Use Value: Maintains signal fidelity under ±100 V/50 ms load dump events while meeting AEC-Q101 lifetime requirements. |
Use Scenario: Safeguarding PLC analog input channels (4–20 mA, 0–10 V) exposed to field wiring transients in factory automation. IC Role / Device Role / Timing Role: Primary front-end surge limiter on terminal blocks, coordinated with upstream fuses and downstream filtering. Use Value: Limits clamped voltage to ≤38.9 V, preventing damage to precision ADCs and op-amps with 36 V absolute max ratings. |
| Telecom Line Card | Consumer Appliance Control Board |
|
Use Scenario: Protecting Ethernet PHY magnetics and PoE-powered device interfaces against induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pairs (e.g., MDI-X) to suppress common-mode transients without disrupting DC bias. Use Value: Symmetric clamping avoids signal distortion on full-duplex links; 800 W rating exceeds IEC 61000-4-5 Level 3 (1 kV/2 Ω). |
Use Scenario: Shielding microcontroller GPIOs and relay drivers on washing machine main boards from motor commutation noise. IC Role / Device Role / Timing Role: Localized TVS at board-level connectors and inductive load switch nodes to prevent latch-up or reset glitches. Use Value: 1.0 µA leakage at 24 V ensures negligible standby current drain; SMB footprint fits dense appliance PCB layouts. |
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 | Unverified in official Vishay documentation for this family; SMBJ series uses same SMB package but lower PPPM (600 W) and higher VC (43.5 V at 13.7 A). | Lower surge handling capacity; suitable only for less severe threat environments (e.g., consumer-grade I/O). | Select SMB8J24CA-M3/5B when 800 W PPPM and 38.9 V VC are required for industrial or automotive compliance. |
| SMCJ24CA-M3/5B | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; PPPM = 1500 W, RθJA = 35 °C/W (lower thermal resistance). | Requires larger PCB area; better for high-repetition surge duty cycles or elevated ambient temperatures (>85 °C). | Choose SMB8J24CA-M3/5B for space-constrained designs where 800 W suffices and SMB footprint is mandated. |
Compared with SMBJ24CA-M3/5B and SMCJ24CA-M3/5B, SMB8J24CA-M3/5B delivers optimal balance of high surge rating (800 W), compact SMB footprint, and AEC-Q101 qualification - making it the preferred choice for automotive and space-limited industrial edge nodes requiring certified reliability.
Availability
SMB8J24CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O conditioning, and telecom line card surge hardening requiring stable component supply and full traceability.
Supply support for SMB8J24CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered for high-power-density transient suppression in harsh environments - particularly targeting automotive, industrial, and communications infrastructure applications.
FAQ
What is the clamping voltage of SMB8J24CA-M3/5B at its rated peak pulse current?
The SMB8J24CA-M3/5B has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 20.6 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures protected circuitry remains below critical overvoltage thresholds during surge events. The SMB8J24CA-M3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J24CA-M3/5B qualified for automotive applications?
Yes, SMB8J24CA-M3/5B is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body controllers, and ADAS sensor modules. The "HM3" designation in Vishay's ordering nomenclature indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified variants - and SMB8J24CA-M3/5B meets all three criteria per Vishay Document Number 88422.
What does the "M3/5B" suffix mean in SMB8J24CA-M3/5B?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, while "/5B" specifies packaging in 13-inch diameter plastic tape and reel containing 3200 units. This configuration supports high-volume SMT assembly and aligns with Vishay's commercial-grade automotive-qualified product line. The SMB8J24CA-M3/5B is not a prototype or evaluation variant - it is a fully qualified production part.
How does SMB8J24CA-M3/5B differ from unidirectional TVS diodes like SMB10J24A-M3/5B?
SMB8J24CA-M3/5B is bidirectional, enabling symmetrical clamping on AC or differential signal lines without polarity concerns, whereas SMB10J24A-M3/5B is unidirectional and requires correct anode/cathode orientation. The SMB8J24CA-M3/5B also has lower PPPM (800 W vs. 1000 W) and higher IPPM (20.6 A vs. 25.7 A) due to bidirectional architecture trade-offs. Both share identical VWM (24 V) and package (SMB), but SMB8J24CA-M3/5B is preferred for CAN, RS-485, and Ethernet protection.
What PCB layout guidance applies to SMB8J24CA-M3/5B for optimal thermal and electrical performance?
Vishay specifies mounting SMB8J24CA-M3/5B on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated PPPM and thermal resistance (RθJA = 72 °C/W). Pad extensions beyond the package outline improve heat spreading, and internal ground planes should connect via multiple vias. Avoid solder mask dams between pads to ensure uniform reflow. The SMB8J24CA-M3/5B must be placed as close as possible to the protected interface connector to minimize inductance in the surge current path.
SMB8J24CA-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):
- 20.6A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J24CA-M3/5B FAQ
1.How can I place an order for SMB8J24CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CA-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 SMB8J24CA-M3/5B reliable?
The price and inventory of SMB8J24CA-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 SMB8J24CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J24CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CA-M3/5B?
SMB8J24CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CA-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 SMB8J24CA-M3/5B?
For technical support, including SMB8J24CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CA-M3/5B requirements.
6.How does Aetrix verify that SMB8J24CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J24CA-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 SMB8J24CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J24CA-M3/5B?
All SMB8J24CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CA-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 SMB8J24CA-M3/5B part is unused and in its original packaging.
Return procedure for SMB8J24CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J24CA-M3/5B Tags
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