ABB X75-B4-48-ND - The PSTX Enclosed Softstarters, designed for both normal-duty and heavy-duty applications, offer versatile performance. They incorporate robust short-circuit protection using Tmax® XT molded case circuit breakers, with a short circuit rating of 65 kAIC for units up to X700, and 100 kAIC for X900 and X1000 units. These softstarters also feature integral electronic overload protection, with adjustable settings for four different tripping classes, preset to Class 10 for normal-duty applications and Class 30 for heavy-duty usage, as per the selection guide. The enclosed PSTX-ND series builds upon the standard PSTX, offering additional features including a UL 508A label, UL 3-wire service entrance rating for X700 and below, NEMA Type 12, 3R, or 4 enclosure options, a door-mounted keypad, six pilot devices, built-in Modbus-RTU communications, and optional Anybus communication modules for various communication protocols. These softstarters are designed to perform reliably in diverse environments and applications, drawing on ABB's expertise in industrial low-voltage controls.