METZ CONNECT KRA-S-F10/21-21 Power Relay 2 Changeover Contacts 10 A 21 V DC Grey 11070713

Industrial control cabinets and building automation systems often demand a relay that can switch moderate loads reliably over millions of cycles. The METZ CONNECT KRA-S-F10/21-21 power relay meets this need with a 2 changeover contact configuration (DPDT) and a 10 A switching capacity at 250 V AC. Its 21 V DC coil makes it suitable for DC control circuits found in PLC outputs, HVAC controllers, and machine tool interfaces.

Key specifications

• Contact configuration: 2 changeover contacts (DPDT)
• Rated switching current: 10 A
• Rated switching voltage: 250 V AC
• Coil voltage: 21 V DC
• Mounting type: Plug-in / socket mount
• Contact material: AgNi (silver nickel)
• Dielectric strength coil/contact: 5000 V AC
• Insulation voltage contact/contact: 1000 V AC
• Operating temperature range: -40 to +70 °C
• Electrical life at rated load: 100,000 operations
• Mechanical life: 10,000,000 operations
• Protection degree: RT II (flux proof)
• Housing colour: Grey
• Series: KRA-S

Why choose it

The KRA-S-F10/21-21 combines high switching capacity with long mechanical endurance, reducing maintenance in demanding applications. Its flux-proof construction protects against solder flux and contaminants, ensuring stable performance in industrial environments. The plug-in design simplifies installation and replacement, minimising downtime.

Ideal use cases

• PLC and industrial control systems
• HVAC and building automation
• Machine tool and conveyor control
• Power distribution and load switching

Good to know

The relay is part of the METZ CONNECT KRA-S series, known for reliable plug-in relays. It is supplied in grey housing and is compatible with standard relay sockets. Always verify coil polarity and load ratings before installation.