170M3811 700V EATON FUSE BUSSMANN

170M3811 700V EATON FUSE BUSSMANN – High-Speed 315A 690V/700V Square Body Semiconductor Fuse

The 170M3811 700V EATON FUSE BUSSMANN (Catalog Model 170M3811 / 170M3811D) is a high-speed, square body semiconductor protection fuse manufactured by Eaton’s Bussmann series. Engineered to deliver exceptional overcurrent, short-circuit, and thermal protection for power semiconductor devices—such as diodes, thyristors, silicon-controlled rectifiers (SCRs), and insulated-gate bipolar transistors (IGBTs)—this $315text{-amp}$ , $690text{ VAC} / 700text{ VAC}$ DIN 43620 blade fuse provides ultra-low energy let-through across industrial power conversion architectures.

Featuring a Class aR operating profile, the 170M3811 700V EATON FUSE BUSSMANN provides rapid clearing speed under severe electrical fault conditions. Rated for an interrupting capacity of $200text{ kA RMS}$ Symmetrical at $690text{ VAC} / 700text{ VAC}$ , its size 1 square body construction is equipped with DIN 43620 blade tags for plug-in installation into standard high-voltage fuse bases or knife-blade contacts.

As shown in the image, the fuse features a high-density ceramic square body body with a top label clearly marked “EATON BUSSMANN 170M3811D 315A 690V IEC 700V UL”, a visual/mechanical trip indicator top tab, and heavy-duty conductive slotted blade end terminals.

Key Features of the 170M3811 700V EATON FUSE BUSSMANN

Ultra-Fast Semiconductor Protection: Built with Class aR clearing characteristics to protect sensitive power semiconductors from high short-circuit currents.
Dual IEC/UL Voltage Rating: Certified for continuous operational duty at $690text{ VAC}$ (IEC standard) and $700text{ VAC}$ (UL standard), enabling global system deployment.
High $200text{ kA}$ Interrupting Capacity: Safely interrupts high prospective fault currents up to $200text{ kAIC}$ at $690text{V}/700text{V}$ , maintaining high electrical system safety.
Low Let-Through Thermal Energy ( $I^2t$ ): Restricts pre-arcing and clearing $I^2t$ energy, minimizing thermal and mechanical stress on downstream power components during faults.
Standardized DIN 43620 Size 1 Blade Mount: Features knife-blade end tags that allow quick push-in mounting into matching open fuse bases or disconnect switches.
Integrated Visual/Mechanical Trip Indicator: Features a top-mounted visual indicator tab for quick identification of blown fuse status during maintenance checks.

Common Applications and Practical Usage

The high breaking capacity, $315text{A}$ current rating, and DIN blade footprint of the 170M3811 700V EATON FUSE BUSSMANN make it an important protective device across industrial power systems:

Variable Frequency Drives (VFDs): Protects main AC drive input rectifiers, internal DC bus links, and inverter modules against internal fault currents.
DC Common Bus Systems: Safeguards high-power DC distribution buses, servo drive systems, and multi-axis motor control centers.
Industrial AC/DC Power Supplies: Protects high-power industrial rectifiers, heavy electroplating units, and large battery storage banks.
Uninterruptible Power Supplies (UPS): Isolates main power line inverters and static switches in utility-grade UPS installations.

Technical Specifications

The core electrical, physical, and compliance specifications for the 170M3811 700V EATON FUSE BUSSMANN are detailed below:

Parameter Specification	Technical Details & Operational Values
Component Classification	High-Speed Square Body DIN Blade Semiconductor Fuse
Primary Target Keyword	170M3811 700V EATON FUSE BUSSMANN
Brand / Manufacturer	Eaton Bussmann Series
Catalog Model / Part No.	170M3811 / 170M3811D
Amperage Rating	$315text{ Amps}$ ( $315text{A}$ )
Voltage Rating	$690text{ VAC}$ (IEC) / $700text{ VAC}$ (UL)
Interrupt Rating (IR)	$200text{ kA RMS}$ Symmetrical at $690text{V}/700text{V}$
Utilization Category	Class aR (Partial Range Semiconductor Protection)
Fuse Size & Mounting	Square Body Size 1 / DIN 43620 Blade Terminals
Indicator Type	Integrated Visual / Mechanical Trip Indicator (D Type)
Watts Loss at Rated Current	Approx. $58text{ W}$
Agency Certifications	UL Recognized (File E125085), IEC 60269-4, CE, UKCA, RoHS

Operating Guidelines and Usage Tips

SAFETY NOTICE: Always isolate main power sources and verify circuits are fully de-energized using a calibrated voltage tester before inspecting or replacing power fuses.

Holder Compatibility: Mount directly into matching Size 1 DIN 43620 fuse bases or open knife-blade fuse holders (such as Eaton Bussmann SB1 series bases).

Semiconductor Coordination: Ensure that the total clearing $I^2t$ of the fuse is lower than the thermal withstand capacity ( $I^2t$ ) of the power semiconductor device being protected.

To review official semiconductor fuse standards and high-speed circuit protection guidelines, consult the National Electrical Manufacturers Association (NEMA) Directory.

To check regional warehouse inventory availability or request commercial quotes for volume electrical fuses, visit the Control Qatar Contact Page.