Littelfuse, Inc. has introduced the 871 Series Ultra-High Amperage SMD Fuse, complementing the existing 881 Series. The new 871 Series offers 150A and 200A fuse ratings, expanding upon the 881 Series’ 125A maximum rating. This surface-mounted solution aims to eliminate the need for parallel fusing configurations in electronic designs. The 871 Series features a small-sized SMD fuse with ratings of 150A and 200A, previously available only in larger through-hole fuses. Daniel Wang, Senior Director of Product Management, states that the 871 Series Fuse can help design teams simplify their processing and bill of materials by reducing multiple fuse components to a single fuse.

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The SRP1 SSRs feature a proprietary power component engineered by Littelfuse to perform in demanding conditions. This component is designed to resist heat degradation, potentially reducing the likelihood of failure and minimizing downtime in machinery applications. The relays are suitable for use in industrial automation, HVAC systems, and food & beverage equipment. View the video here.

The SRP1 series offers ratings from 10 A to 90 A at low or high voltage, with AC or DC control options. It includes Zero Voltage and Instantaneous turn-on capabilities for various application needs. The relays incorporate IP20 finger-safe protection and overvoltage protection features. They are designed to comply with international standards for safety and product quality.

Littelfuse offers the SRP1 SSRs in five configurations: SRP1-CR with integrated protection features, SRP1-CB for design flexibility, SRP1-CB…F with quick-connect terminals, SRP1-CE for simple heating applications, and SRP1-CC for DC voltage load applications. The basic SRP1 relays are rated for up to approximately 350,000 life stress cycles, while enhanced versions can reach up to about 750,000 cycles.

The SRP1 Solid-State Relays are now available and can be ordered through authorized Littelfuse distributors worldwide. They join Littelfuse’s existing portfolio of solid-state technology solutions, which includes PCB-mount solid-state relays, HVAC solid-state timers, and power components such as SCRs and MOSFETs.

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The NPS3102A and NPS3102B eFuses have a wide input voltage range (21 V abs. max) and have an integrated low-resistance pass MOSFET which minimizes voltage drop and power loss. This feature helps to increase operating efficiency beyond that attainable from similar competing devices in the same package type. The current clamp limit can be adjusted in the 2–13.5 A range using a resistor at the ILIM pin, which can also be used to measure load current in real-time. Both devices include a built-in overvoltage clamp that limits the output voltage during an input overvoltage condition, with a 2 μs short-circuit protection response time.

The pass-FET in the NPS3102A must be manually reset after a fault event whereas the NPS3102B integrates an auto-retry block, which safely attempts to re-enable the pass-FET without the need for user intervention. Apart from having the ability to quickly protect systems against input and output overvoltages and large inrush currents, Nexperia eFuses are designed to protect the downstream loads from high current fault conditions given its 10% current limiting accuracy. The NPS3102A and NPS3102B are available in DFN3030-10/SOT8037-1 leadless plastic packages measuring only 3.0 x 3.0 x 0.75 mm.

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