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Vishay General Semiconductor - Diodes Division SMB8J24CA-M3/52
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- Part No.:
- SMB8J24CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CA-M3/52.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,210
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Product details
Overview
SMB8J24CA-M3/52 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) at 1 mA, 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-M3/52 datasheet, SMB8J24CA-M3/52 pinout, SMB8J24CA-M3/52 application, or SMB8J24CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while meeting MSL Level 1 per J-STD-020 with 260 °C reflow peak.
The device delivers 800 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with clamping performance validated at TJ = 25 °C and derated linearly above TA = 25 °C per Fig. 2. Its RθJA of 72 °C/W and RθJL of 20 °C/W support reliable thermal management in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - ensures predictable turn-on threshold with tight ±5% tolerance |
| VC @ IPPM | 38.9 V at 20.6 A - limits downstream voltage stress during 10/1000 µs surge events |
| PPPM | 800 W - peak transient energy absorption capacity under standard waveform |
| ID @ VWM | <1.0 µA - minimal standby power loss and signal integrity impact in high-impedance circuits |
| TJ max. | +150 °C - supports operation in under-hood automotive and industrial ambient environments |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads, MSL Level 1, 260 °C peak reflow. Polarity: bidirectional - no cathode marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping enables single-device protection across AC or floating lines |
| Cathode Band (absent) | Polarity indicator | Not applicable - bidirectional construction eliminates need for polarity marking per datasheet note |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-component protection of AC-coupled, differential, or floating signal lines without polarity constraints |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant (M3) | Meets global environmental regulations and JESD201 Class 2 whisker resistance requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V systems) and IEC 61000-4-2 ±15 kV contact discharge. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring surges and ground bounce. IC Role / Device Role / Timing Role: Primary surge suppression element on each channel's input line, upstream of optocoupler or Schmitt trigger. Use Value: Limits clamped voltage to ≤38.9 V, ensuring downstream logic remains within safe operating area during 1 kV/500 A surge events. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from induced lightning surges. IC Role / Device Role / Timing Role: Secondary-level protection aligned with IEC 61000-4-5 (10/700 µs) requirements on data line pairs. Use Value: Withstands 800 W peak pulse power, reducing need for cascaded protection stages and board space. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to absorb inductive kickback during MOSFET/FET switching. Use Value: Clamps spike energy within 1 ns response time, preventing gate oxide damage to driving half-bridge ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J24CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Preferred for commercial-grade designs where halogen-free requirement is absent | Select E3 for cost-sensitive non-automotive applications with identical clamping performance |
| SMBJ24CA-M3/52 | Lower PPPM (600 W vs. 800 W); same VWM/VBR/VC; identical SMB package | Insufficient for high-energy transients requiring ≥800 W margin (e.g., ISO 7637-2 Pulse 5a) | Choose SMB8J24CA-M3/52 when higher surge immunity is mandatory; SMBJ24CA-M3/52 suits lower-tier surge classes |
Compared with SMB8J24CA-M3/52, the E3 variant offers identical protection performance without halogen-free compliance, while SMBJ24CA-M3/52 trades 200 W peak power for broader availability - making SMB8J24CA-M3/52 optimal for AEC-Q101–mandated, high-surge automotive and industrial deployments.
Availability
SMB8J24CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term lifecycle assurance.
Supply support for SMB8J24CA-M3/52 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 SMB8JxxCA series targets high-energy transient suppression in automotive and industrial environments, engineered for AEC-Q101 compliance, low clamping voltage, and robust surge handling in compact SMB packages.
FAQ
What is the clamping voltage of SMB8J24CA-M3/52 under maximum surge current?
The SMB8J24CA-M3/52 exhibits a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 20.6 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C with device mounted on 5.0 mm × 5.0 mm copper pads per datasheet Fig. 1 and Table - critical for verifying downstream IC overvoltage margins in designs using SMB8J24CA-M3/52.
Is SMB8J24CA-M3/52 suitable for automotive applications?
Yes, SMB8J24CA-M3/52 is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HM3_X (e.g., SMB8J24CA-HM3_A). Its construction includes glass-passivated junction, MSL Level 1 rating, and validation across temperature cycling, HTRB, and ESD tests - confirming suitability for engine control, ADAS, and body electronics where SMB8J24CA-M3/52 is deployed.
How does the M3 suffix differ from E3 in SMB8J24CA-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, whereas E3 is RoHS-compliant but contains halogens. Both share identical electrical characteristics and SMB package dimensions. SMB8J24CA-M3/52 is specified for environmentally regulated markets (e.g., EU automotive), while SMB8J24CA-E3/52 serves general commercial applications where halogen-free status is not mandated.
What is the thermal resistance from junction to lead (RθJL) for SMB8J24CA-M3/52?
The SMB8J24CA-M3/52 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as stated in the Thermal Characteristics table of Vishay document 88422. This low value enables efficient heat transfer to PCB copper pads during repetitive surge events - a key parameter for thermal design validation when using SMB8J24CA-M3/52 in high-duty-cycle protection circuits.
Does SMB8J24CA-M3/52 require polarity-aware PCB layout?
No - SMB8J24CA-M3/52 is a bidirectional TVS diode with symmetrical terminal behavior, meaning either end may connect to line or return without functional impact. The datasheet confirms "no marking on bidirectional types" and omits cathode band designation, eliminating orientation constraints during placement and simplifying layout for differential or floating interfaces using SMB8J24CA-M3/52.
SMB8J24CA-M3/52 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-M3/52 FAQ
1.How can I place an order for SMB8J24CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CA-M3/52 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-M3/52 reliable?
The price and inventory of SMB8J24CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J24CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J24CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CA-M3/52?
SMB8J24CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CA-M3/52 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-M3/52?
For technical support, including SMB8J24CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CA-M3/52 requirements.
6.How does Aetrix verify that SMB8J24CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J24CA-M3/52 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-M3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J24CA-M3/52?
All SMB8J24CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CA-M3/52, 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-M3/52 part is unused and in its original packaging.
Return procedure for SMB8J24CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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