4000388570 — 350A High-Current Fuse for AWP Boom Lifts

The 4000388570 is a 350-ampere high-current fuse designed for AWP (Aerial Work Platform) boom lifts including the STAR 8, AC-22J, and AC ST series construction machinery. This heavy-duty fuse protects critical electrical circuits — including the main power distribution bus, hydraulic pump motor controller, and traction drive system — from overcurrent conditions that can result from motor stall, short circuits, or wiring faults. Rated for 350A continuous current with a time-delay characteristic, it tolerates the momentary inrush currents of electric drive motors while still opening rapidly under sustained overload or dead-short conditions. The fuse uses a precision-calibrated silver-alloy element enclosed in a ceramic body filled with arc-quenching silica sand, ensuring clean interruption without fragmentation even at maximum rated breaking capacity.

The fuse body is constructed from high-grade steatite ceramic with nickel-plated copper end caps that provide low contact resistance and excellent corrosion resistance in outdoor construction environments where moisture, dust, and temperature extremes are common. Blade-style terminals are designed for bolt-down connection in standard industrial fuse holders, accepting M8 or M10 hardware with recommended torque of 10-15 Nm. The transparent inspection window at the top of the fuse body provides visual confirmation of element integrity — if the silver element appears intact and the indicator dot is white, the fuse is operational; a blackened window or missing indicator confirms a blown condition. This fuse meets or exceeds UL 248 and IEC 60269 standards for industrial low-voltage fuses.

This fuse is a direct replacement for AWP STAR 8, AC-22J, and AC ST series boom lifts used extensively in construction, facility maintenance, and warehouse operations. It is also compatible with select scissor lifts and telehandlers using 48V-80V DC electrical systems with similar amperage requirements. Always verify the original fuse rating marked on the equipment nameplate or service manual before replacement — never substitute a higher amperage fuse as this can result in wiring damage or fire hazard. Keep spare fuses in the on-board tool kit for rapid field replacement to minimize machine downtime. For additional AWP electrical components and safety devices, browse our Electronic Control Parts catalog. Reference Genie AWP for equipment-specific electrical specifications.

Technical Specifications

• PN: 4000388570
• Current Rating: 350A
• Voltage Rating: 80V DC (Typical)
• Type: Time-Delay / Slow-Blow
• Body: Steatite Ceramic with Sand Fill
• Terminal: Blade Type, Bolt-Down (M8/M10)
• Indicator: Visual Inspection Window

Compatible Equipment

Each Kingstream 4000388570 fuse is individually tested for continuity and correct resistance (typically less than 0.1 milliohm across terminals) before packaging. The fuse is packed in anti-static conductive foam inside a rigid plastic tube to prevent terminal damage and electrostatic discharge during shipping. We ship worldwide with typical dispatch within 24 hours for in-stock items. All fuses carry a 12-month warranty against manufacturing defects. Ordering in bulk for fleet maintenance? Contact our support team for volume pricing and scheduled delivery options.