Eaton Micro Switch 170H0069 – High-Speed Fuse Status Indicator & Auxiliary Switch
The Eaton Micro Switch 170H0069 is a precision-engineered, high-performance auxiliary switch designed to monitor and signal the status of high-speed semiconductor fuses. Manufactured under Eaton’s globally trusted Bussmann series, this heavy-duty electrical accessory provides critical real-time diagnostics. It is specifically built to interface with Type K square body fuses, offering an electromechanical switching mechanism that instantly flags a blown-fuse event to automation PLCs, safety relays, or control room systems.
As displayed on the product casing, the Eaton Micro Switch 170H0069 features a robust, heat-resistant housing with built-in mounting terminals, brass rivet holes, and a clear, visual single-pole double-throw (SPDT) wiring schematic. Rated at 5A at 250 VAC, this compact microswitch is a critical safety component for industrial electrical panels, helping prevent single-phasing issues, machinery damage, and prolonged operational downtime.
Key Features of the Eaton Micro Switch 170H0069
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Direct Electromechanical Fuse Monitoring: Integrates with high-speed semiconductor fuses to immediately signal a blown-fuse condition, allowing automated system shutdowns.
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High-Capacity Electrical Rating: Rated at 5A, 250VAC to handle demanding industrial auxiliary control loops with absolute reliability.
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Robust Hungarian Craftsmanship: Proudly manufactured in Hungary to Eaton’s rigorous standards of build quality, offering extended mechanical life in harsh environments.
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Quick-Connect Spade Terminals: Features 6.30mm x 0.80 mm quick-connect lug terminals for fast, solder-free wiring.
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Global Safety Certifications: Fully cURus recognized and RoHS compliant, assuring strict adherence to international electrical protection and environmental standards.
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Compact, Low-Profile Footprint: Designed to mount perfectly alongside standard high-speed fuses inside crowded, high-density industrial control cabinets without interfering with surrounding hardware.
Common Applications and Usage
The Eaton Micro Switch 170H0069 is specified by electrical maintenance technicians and design engineers across various industrial sectors:
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Semiconductor and Rectifier Protection Panels: Monitors high-speed fuses that safeguard critical components like diodes, thyristors, and SCRs.
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Variable Frequency Drive (VFD) Cabinets: Signals when a power-stage fuse fails, triggering the drive’s control system to safely shut down and protect the motor.
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Industrial Automated Control Panels: Injects direct binary status feedback to PLCs (Programmable Logic Controllers) inside SCADA networks.
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Electrical Distribution Boards: Provides remote warning indication over long distances to warn maintenance crews of isolated power faults.
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Power Supply Retrofitting: Acts as a rapid-swap, drop-in replacement part to upgrade legacy systems with remote telemetry functions.
Technical Specifications
| Parameter Specification | Technical Details & Operational Ratings |
| Product Component Class | High-Speed Fuse Accessory / Microswitch |
| Primary Target Keyword | Eaton Micro Switch 170H0069 |
| Manufacturer Catalog Number | 170H0069 |
| Current Rating | 5 Amps |
| Voltage Rating | 250 Volts AC |
| Contact Configuration | Single-Pole Double-Throw (SPDT / 1 NO, 1 NC, 1 COM) |
| Terminal Connection Type | 6.30 mm x 0.80 mm Lug / Spade |
| Compatible Fuses | Type K Sizes 1*, 1, 2, 3, and 24 (DIN, US, French, Flush End) |
| Product Dimensions | 51 mm (Length) x 38mm (Height) x 17 mm (Width) |
| Product Weight | 13.8 grams (0.49 oz) |
| Country of Manufacture | Hungary |
| Environmental Compliance | RoHS Compliant |
Benefits of the Eaton Micro Switch 170H0069
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Minimizes System Downtime: Instantly pinpoints the exact location of a blown fuse, eliminating manual tracing in large power distribution panels.
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Prevents Single-Phase Damage: By immediately notifying controllers of a blown fuse, it prevents three-phase motors from running on a single phase, saving expensive hardware.
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Easy Retrofitting & Servicing: The clip-on physical structure makes replacement fast and straightforward during scheduled routine system maintenance.
Installation and Safety Guidelines
Warning: Turn off, lock out, and tag out all primary power sources upstream before handling, installing, or replacing the Eaton Micro Switch 170H0069.
Mounting to the Fuse: Clip the microswitch housing directly onto the designated accessory brackets of a compatible Type K high-speed square-body fuse. Ensure the spring-loaded actuator aligns properly with the fuse’s mechanical indicator pin.
Terminal Connections: Connect standard insulated female spade connectors onto terminals 1 (Common), 4 (Normally Open), and 2 (Normally Closed) to match your control circuit schematic.
Verify Alignment: Manually ensure the switch mechanism moves freely. Test the auxiliary circuit loop continuity before restoring main grid power to verify proper contact signaling.
To review official electrical certification sheets, terminal dimensional drawings, and complete high-speed accessory catalogs, check the global Eaton Bussmann Series Electrical Circuit Protection Support Directory.
To request a fast commercial quote or evaluate real-time regional warehouse stock availability for bulk procurement needs, please connect with our sales branch via the Control Qatar Contact Page.






