Technical Specifications:

• Model: KP1-C05
• Series: KP1
• Coil Voltage: 24V DC
• Rated Current (AC-1): 5A at 230V AC
• Rated Current (DC-1): 5A at 220V DC
• Number of Poles: 1 NO + 1 NC (SPDT — Single Pole Double Throw)
• Coil Power Consumption: 0.5W (hold) / 2.0W (pull-in)
• Contact Material: AgSnO₂ (Silver Tin Oxide)
• Mechanical Life: 10,000,000 operations
• Electrical Life (AC-1): 500,000 operations at 5A, 230V AC
• Operating Time: Pull-in: ≤ 15 ms / Drop-out: ≤ 10 ms
• Insulation Resistance: ≥ 100 MΩ at 500V DC
• Dielectric Strength: 2500V AC, 1 min (between coil and contacts)
• Protection Class: IP20 (when mounted in control panel)
• Operating Temperature: -25°C to +70°C
• Mounting: DIN rail 35 mm (EN 60715) or screw mounting
• Standards: EN 60947-4-1, EN 60947-5-1, IEC 61813
• SEAB Certification: Yes — certified for environmental control applications

Functional Features:

• SPDT configuration (1NO + 1NC): Allows simultaneous switching of two circuits.
• AgSnO₂ contacts: Superior arc suppression and welding resistance compared to AgNi or AgCdO.
• LED status indicator: Visual confirmation of coil energization (on selected variants).
• Snubber circuit (RC network): Integrated across contacts to suppress voltage transients on inductive loads.
• Coil suppression diode: Built-in flyback diode for DC coil protection.
• Mechanical indicator: Flag shows contact position (energized/de-energized).

Material Composition:

• Coil Bobbin: PA66 GF30 (glass-fiber reinforced polyamide)
• Coil Wire: Copper, Class H insulation (180°C)
• Contact Plates: CuZn37 brass, silver-plated
• Contact Tips: AgSnO₂ (88% Ag, 12% SnO₂) sintered
• Armature: Soft iron (low carbon steel), nickel-plated
• Housing: PA66 GF30, UL94 V-0 flame-retardant, self-extinguishing
• Terminals: Screw terminals, 3.5 mm² max wire capacity, tin-plated brass

Structural Features:

• Compact modular design: Width 17.5 mm per module on DIN rail.
• Clip-on DIN rail mounting with snap-in mechanism.
• Clear contact status flag visible from the front.
• Terminal labeling: A1, A2 (coil); 11, 12, 14 (contacts: NC, COM, NO).

Working Principle:
When 24V DC is applied to the coil terminals (A1/A2), current flows through the copper winding, generating a magnetic field that pulls the soft iron armature toward the core. This mechanical movement closes the NO contact (11–14) and opens the NC contact (11–12). When the coil is de-energized, a return spring pushes the armature back to its resting position, reversing the contact states. The flyback diode across the coil absorbs the inductive voltage spike during de-energization, protecting the driving circuit. The RC snubber across the contacts suppresses arcing during switching of inductive loads.

Advantages & Highlights:

• AgSnO₂ contacts provide 500,000 cycle electrical life at rated load.
• 15 ms pull-in time enables fast switching for automation sequences.
• SEAB certified — verified for environmental and safety-critical installations.
• Compact 17.5 mm width saves space in control panels.
• 24V DC coil is standard for building automation and safety circuits.

Applicable Industries / Use Cases:

• HVAC control systems
• Building automation (BMS/BAS)
• Industrial control panels
• Safety circuits (fire alarm, emergency stop)
• Lighting control systems

Installation Requirements:

• Mount on DIN rail EN 60715 (35 mm) in a control cabinet.
• Connect coil to 24V DC control supply (A1 = +24V, A2 = 0V).
• Connect load circuits to 11 (COM), 12 (NC), 14 (NO) terminals.
• Use wire size 0.5–2.5 mm² for coil; 0.5–4 mm² for contacts.
• Ensure ambient temperature does not exceed +70°C in the cabinet.
• Provide adequate ventilation — derate by 10% per 10°C above 40°C.

Usage Precautions:

• Do not exceed rated current of 5A — overcurrent will weld contacts.
• Use the correct coil voltage (24V DC) — applying 230V AC to the coil will destroy it instantly.
• For inductive loads (motors, solenoids), always use the variant with RC snubber or add an external suppressor.
• Replace if contact resistance exceeds 50 mΩ (measured with micro-ohmmeter).
• Store in dry conditions; the coil insulation can degrade in high humidity.