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SMBJ18A
+BOMTVS DIODE 21.1VWM 29.2VC DO214AA
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ManufacturerRectron USA
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Mfr. Part #SMBJ18A
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Datasheet SMBJ18A DataSheet
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Package DO-214AA
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In Stock4919
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Specifications
| Attribute | Value |
| Package | Tape & Reel (TR) |
| Series | SMBJ |
| ProductStatus | Active |
| Type | Zener |
| UnidirectionalChannels | 1 |
| Voltage-ReverseStandoff(Typ) | 21.1V |
| Voltage-Clamping(Max)@Ipp | 29.2V |
| Power-PeakPulse | 600W |
| Applications | General Purpose |
| OperatingTemperature | -55°C ~ 150°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | DO-214AA, SMB |
Overview
Description
Key features of the SMBJ18A include a breakdown voltage of approximately 18 volts, allowing it to clamp voltage to safe levels during overvoltage events. It boasts a fast response time in the order of picoseconds, providing effective protection against electrostatic discharge (ESD), lightning-induced surges, and other transient voltage phenomena.
The device is typically packaged in a DO-214AA (SMB) package, which is compact and suitable for high-density circuit boards. It can handle a peak pulse power of 600 watts for an 8/20 microsecond waveform, which is standard for testing TVS diodes.
Due to its reliability and robust performance, the SMBJ18A is widely used in telecommunications, automotive, industrial, and consumer electronics to ensure the longevity and stability of electronic devices by safeguarding them against unexpected voltage surges.
Equivalent
1. Littelfuse SMAJ18A
2. Bourns SMAJ18A
3. ON Semiconductor SMAJ18A
4. Vishay SMAJ18A
5. STMicroelectronics SMAJ18A
These equivalent models have similar electrical characteristics and are used in similar applications for over-voltage protection. Always verify specific parameters and certifications required for your application.
Features
1. Breakdown Voltage: The SMBJ18A has a breakdown voltage of 18V, ensuring it activates to clamp overvoltage conditions effectively.
2. Peak Pulse Power: It can handle peak pulse power of 600W under a 10/1000µs waveform, providing robust protection against transient voltage spikes.
3. Low Leakage Current: The device typically exhibits low leakage current, contributing to energy efficiency and minimizing standby power consumption.
4. Fast Response Time: The diode’s fast response time ensures quick clamping of overvoltage transients, protecting sensitive components from damage.
5. Package Type: It comes in a DO-214AA (SMB) package, which is compact and supports surface mount technology for convenient PCB integration.
6. Polarity: Unidirectional, making it suitable for applications where only positive voltage spikes need suppression.
These features make the SMBJ18A suitable for use in a variety of electronic applications, including power supplies, consumer electronics, and telecommunications equipment.
Pinout
- Pin Count: 2 pins
- Function: The primary function of the SMBJ18A is to clamp over-voltage transients to a safe level, thereby protecting downstream components. It is bidirectional, meaning it can protect against both positive and negative voltage spikes.
Key electrical specifications for the SMBJ18A include:
- Standoff Voltage: 18V
- Breakdown Voltage: Typically around 20V
- Peak Pulse Power Dissipation: 600 watts (10/1000 µs waveform)
The SMBJ18A is commonly used in a variety of applications including power supply lines, data lines, and other circuits requiring protection from transient voltages.
Manufacturer
1. Littelfuse: This is a global company that designs and manufactures a diverse range of circuit protection, power control, and sensing products. Littelfuse is known for providing solutions in electronics, automotive, and industrial applications.
2. ON Semiconductor: Now known as onsemi, this company provides intelligent technology solutions. They focus on energy-efficient innovations and offer a wide array of semiconductor products for various sectors, including automotive, industrial, cloud, and IoT.
3. Vishay Intertechnology: Vishay is one of the world's largest manufacturers of discrete semiconductors and passive electronic components. Their products are essential for electronic circuits and are used in industries like automotive, industrial, computing, consumer, telecommunications, and military.
All these companies are major players in the electronic component manufacturing industry, supplying essential components for a variety of applications globally.
Application
1. Telecommunications: Safeguarding network equipment from voltage transients.
2. Consumer Electronics: Protecting devices like televisions and computers from electrical surges.
3. Industrial Electronics: Ensuring the reliability of control systems and automation equipment.
4. Automotive Systems: Shielding electronic modules from load dump and ESD events.
5. Power Supplies: Preventing damage to power conversion equipment.
These applications leverage the SMBJ18A's ability to clamp voltage spikes and absorb energy, preventing damage to downstream components.