Answering growing concerns about manufacturing yields for PCBs populated with increasingly smaller components, Littelfuse has introduced a nickel barrier termination option for its complete line of 0402 (EIA 1005) size multilayer varistor (MLV) products.
This feature enhances their solderability by improving the wetting characteristics of the termination and thus resisting sliding and tombstoning during board assembly, says the company. The improved solderability is especially important in the manufacturing of small digital consumer technology products where board space is at a premium. The propriety nickel barrier treatment provides a component with greater flexibility in board layout and processing. Littelfuse says this maintains high quality solder coverage, superior fillet heights and resistance to tombstoning. In addition to its 0402 sizes, the company is now able to offer the nickel barrier option for all of its MLV products.
Circuit board layout issues such as solder pad size and orientation or proximity to larger components (that act like heatsinks) can contribute to poor solder performance, as can choice of time versus temperature profile. Extremely small components (ie, 0402 outline) with silver-based termination options, are more susceptible to these soldering issues than devices with nickel barrier terminations. In the nickel barrier process, a plated nickel layer is placed over the standard silver termination to ensure that the termination is immune to solder leaching. Tin plating is then placed over the nickel layer to improve solder wetting characteristics.
With the new addition to the multilayer varistor families, Littelfuse has added to its leading electrostatic discharge (ESD) suppression portfolio that protects data lines, signal lines, and power buses. The portfolio includes multilayer varistors (MLVs), silicon rail-clamp and TVS diode arrays as well as ultra-low capacitance PulseGuard polymer products to provide design engineers with one of the broadest range of electrostatic discharge (ESD) solutions in the industry.
For additional information regarding the new nickel barrier termination option for Littelfuse multilayer varistors or to learn more about ESD protection see www.littelfuse.com
For more information contact Ashley Sundraj, Arrow Altech Distribution, 011 923 9600, [email protected]
Reference board for cardio monitoring Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The STDES-ESP01 reference board from STMicroelectronics demonstrates the capability of the ST1VAFE6AX and ST1VAFE3BX biosensors to detect ECG and SCG signals.
Read more...ST MCUs extend ultra-low power innovation Altron Arrow
DSP, Micros & Memory
STMicroelectronics has introduced new STM32U3 microcontrollers with cutting-edge power-saving innovations that ease deployment of smart connected tech, especially in remote locations.
Read more...Multicell battery monitoring Altron Arrow
Power Electronics / Power Management
The LTC6811 from Analog Devices is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1,2 mV.
Read more...Innovative satellite navigation receiver Altron Arrow
Telecoms, Datacoms, Wireless, IoT
STMicroelectronics has released an innovative satellite navigation receiver to democratise precise positioning for automotive and industrial applications.
Read more...LED driver for industrial power supply indication Altron Arrow
Editor's Choice Circuit & System Protection
A simple and small solution for driving an LED to provide visual feedback in the presence/absence of a system’s power using a chip not originally designed for this purpose.
Read more...High-voltage step-down DC-DC converter Altron Arrow
Power Electronics / Power Management
The MAX17793 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 3 to 80 V.
Read more...Clearing the Static: Cleaning in an ESD-protected area Actum Electronics
Circuit & System Protection
Cleaning in a protected electrostatic discharge area is a critical task to maintain the integrity of sensitive electronic components and prevent damage caused by static electricity.
Read more...High-speed SAR ADC simplifies design Altron Arrow
Analogue, Mixed Signal, LSI
The ADI AD4080 simplifies data converter integration by integrating a low drift reference buffer, low dropout regulators and a 16K result data FIFO buffer.
printer friendly version