Eaton (Bussmann) 170M4209 — 170M Series High‑Speed Square‑Body Fuse, 250 A, 690 V AC (700 V UL), aR Semiconductor Protection, Fuse Size 1, Top Status Indicator (TN/110) — Pack of 3

The Eaton (Bussmann) 170M4209 is a high‑speed square‑body fuse engineered for semiconductor and power‑electronic protection. Rated 250 A and 690 V AC (700 V per UL), with aR utilization for semiconductor protection and a top fuse status indicator (TN/110 Type T) for blown‑fuse signaling, this Fuse Size 1 unit provides high interrupting capability and reliable clearing in demanding industrial applications. Supplied as a pack of 3.

Key specifications

• Manufacturer: Eaton (Bussmann)
• Catalog / Model: 170M4209 — FUSE 250A 690V 1TN/110 AR UC
• Product type: High‑speed square‑body fuse (DIN 43653 style)
• Ampere rating: 250 A
• Voltage rating: 690 V AC (IEC); 700 V (UL)
• Interrupting / Breaking capacity: 200 kA (200 kAIC)
• Utilization category: aR (for semiconductor protection)
• Fuse size / Construction size: 1
• Fuse indicator: Top fuse status indicator (TN/110 Type T)
• Fuse shape & connection: Square body with slotted center bolted tags; blade end × blade end connection; center‑to‑center connection distance 108 mm; mounting dimension M10
• Clearing (I2t): 42,000 A2s at 660 V (pre‑arc I2t: 155,000 A2s) — refer to datasheet for full time‑current characteristics
• Watt losses: 55 W (at rated current)
• Interrupt rating / Certification: IEC rated; UL recognized; CE marked; RoHS compliant
• Weight & dimensions (packaging dependent): Unit weight 162 g; product dimensions listed in manufacturer data
• Typical applications: Semiconductor protection, DC common bus, DC drives, power converters / rectifiers

Features & benefits

• aR characteristic for fast clearing of faults in semiconductor devices and power converters.
• High 200 kA interrupting capability for heavy fault environments.
• Integrated top status indicator (TN/110) simplifies blown‑fuse detection and optional microswitch integration.
• Robust square‑body construction with bolted center tag for secure connections and reliable mechanical performance.
• Eaton/Bussmann quality standards and global certifications for industrial use.

Installation & handling notes

• Fit into holders and fuse systems compliant with DIN 43653 and rated for 690 V AC fuse links.
• Replace only with identical Eaton 170M series aR fuses to maintain coordination and safety.
• Observe manufacturer guidance for torque on bolted tags (M10), conductor sizing and thermal considerations.
• Consult Eaton datasheet for complete time‑current curves and coordination examples.

Ordering & packaging

• Pack of 3 (standard packaging). UPC: 051712258074. Non‑stocked/lead time may apply; request delivery quote where required.