Eaton (Bussmann) 170L5020 High‑Speed Square‑Body Fuse-Link — 250A, 660 V AC aR Semiconductor Protection, Compact Size 1 (43×58×140 mm), Bolted Tag, Top Indicator — Pack of 6

The Eaton (Bussmann) 170L5020 is a high‑speed square‑body fuse‑link engineered for semiconductor protection in industrial power systems. Classified as Class aR, it provides fast clearing characteristics tailored to protect power semiconductors, rectifiers and converters. This listing is for a pack of six (6) pieces.

Key specifications

• Manufacturer / Brand: Eaton (Bussmann)
• Part / Catalog number: 170L5020 (Global Catalog: 170L5020)
• Product type: High‑speed square‑body fuse-link (bolted tag) — Class aR (semiconductor protection)
• Application: Semiconductor protection, power converters, rectifiers, industrial AC systems
• Amperage rating: 250 A
• Voltage rating: 660 V AC
• Utilization category / Class: aR (accompanied semiconductor protection), Class aR
• Fuse size: Compact Size 1 (listed as Size 1) — nominal compact dimensions: 43 × 58 × 140 mm (compact size 1)
• Construction / Body: Square body with slotted center bolted tags; bolted tag fuse type (DIN 43653 compatible)
• Fuse indicator: Top fuse status indicator (single indicator)
• Breaking capacity: 200 kA
• Current type: AC
• Center‑to‑center distance of connections: 108 mm
• Mounting / Terminals: Bolted tag, mounting dimension M10
• Watt losses at rated current: 50 W
• Product dimensions (as packaged/product listing): Length/Depth 305 mm × Width 145 mm × Height 65 mm
• Product weight: 58.2 g (per unit)
• Packaging: Standard; sell pack quantity: 6 pcs
• Compliance: RoHS compliant; consult Eaton for additional certifications (contact factory)

Features & benefits

• High breaking capacity (200 kA) for robust fault interruption in high‑energy systems.
• aR characteristic specifically optimized for fast clearing of faults affecting semiconductor devices.
• Bolted tag construction with slotted center tags and top visual indicator for reliable connection and quick status check.
• Compact Size 1 form factor for space‑efficient installations while maintaining high performance.

Installation & safety notes

• Verify mechanical and electrical compatibility with DIN 43653 / bolted tag fuse holders and mounting hardware; ensure M10 bolt clearance and 108 mm center‑to‑center spacing.
• Use time‑current curves and coordination tables from Eaton to confirm selectivity and system protection; consult datasheet for full T‑I characteristics.
• Observe rated voltage 660 V AC and rated current 250 A; ensure proper derating and ambient conditions per Eaton guidelines.

Documentation & support

• For full technical documentation, time‑current curves, installation instructions and certification details, refer to Eaton (Bussmann) datasheet for part 170L5020 or contact Eaton technical support.