The Siemens / Potter & Brumfield KHU-17D11-24 is a panel plug-in relay engineered for industrial control and switching applications. This socketable unit delivers 4 Form C (4PDT) contact configuration with 24 VDC coil operation, consuming 0.85 W at nominal voltage. Silver contacts rated 2–5 A across multiple voltage classes—120/240 VAC or 28 VDC—handle diverse switching loads from 100 mA minimum. Operate and release times of 13 ms and 6 ms respectively enable fast, predictable circuit response. The relay withstands 10 million mechanical cycles and maintains dielectric strength to 1500 Vrms between critical isolation points.
Technical Specifications
Electrical
• Coil voltage: 24 VDC
• Coil power: 0.85 W
• Coil resistance: 650 Ω / 690 Ω
• Contact arrangement: 4 Form C (4PDT)
• Contact current rating: 2–5 A
• Contact voltage: 120/240 VAC or 28 VDC
• Minimum switching load: 100 mA @ 12 V
• Operate time: 13 ms typical
• Release time: 6 ms typical
• Mechanical endurance: 10 × 10⁶ operations
• Insulation resistance (initial): 100 MΩ
• Dielectric strength: 1000–1500 Vrms (coil-to-frame, adjacent/open contacts)
Physical
• Dimensions: 28.17 mm L × 21.82 mm W × 32.54 mm H
• Weight: 45 g
• Mounting: Panel plug-in socket
• Terminals: Solder/plug-in
Environmental
• Operating temperature: −45 to +70 °C
• Coil insulation: UL Class B
• Protection rating: IEC 61810 RTI (dust protected)
• RoHS compliant
– Key Features
• Silver-contact construction for reliable switching across AC and DC circuits
• Fast switching response (13 ms operate, 6 ms release) suits time-critical applications
• High contact durability rated to 10 million mechanical cycles
• Compact socketable design enables field replacement without panel redesign
• Wide temperature operating range (−45 to +70 °C) for climate-variable environments
– Typical Applications
• Industrial automation control circuits
• Panel-mounted switching logic
• Process control and machinery interlocks
• Commercial HVAC and lighting control
– Compatibility & Integration
Designed for standard relay sockets in 24 VDC control systems. Contact voltage ratings support both AC (120/240 VAC) and low-voltage DC (28 VDC) switching. Socketable architecture permits direct replacement in existing panels without rewiring.
