Relay Circuit Diagram Overview

The document provides detailed pin configurations for various relay models (e.g., SIR282, SIR372, SIR462, SIR552, SIR642, SIR732, SIR822, SIR912) with relay top view numbering for coil and contact terminals.

Insulation Specifications

• Basic insulation rated at 250 VAC with air and creepage distances greater than 4 mm.
• Double or reinforced insulation rated at 250 VAC with air and creepage distances greater than 8 mm.
• Test voltages: 2500 V (50 Hz, 1 min) for basic insulation, 4000 V (50 Hz, 1 min) for reinforced insulation.
• Contact open test voltage: 1500 V (50 Hz, 1 min).
• Creepage resistance CTI 250, Pollution degree 2, Overvoltage category III.
• Insulation resistance at 500 VDC is greater than 100 MΩ.

Mechanical and Electrical Performance

• Mechanical endurance exceeds 10 million operations.
• Mechanical switching frequency up to 15 Hz.
• Typical response time: 18 ms (all normally open contacts closed).
• Drop-out time: typically 5 ms (normally closed contacts closed).
• Contact bounce times: 8 ms for NO contacts, 12 ms for NC contacts.
• Shock resistance: NO contacts >10g, NC contacts >6g.
• Vibration resistance: NO contacts >8g (10-200 Hz), NC contacts >2.5g.
• Short circuit contact resistance: withstands 1000 A with 10 A gG/gL pre-fuse.
• Operating ambient temperature range: -40°C to +70°C.
• Thermal resistance: 40 K/W; coil temperature limit: 125°C.
• Weight approximately 60 grams; mounting position is flexible with recommended spacing >5 mm.

Standards, Tests, and Approvals

• UL File E188953 Section 3 approval.
• Insulation class according to IEC 60664-1 at 250 VAC.
• Fire protection rating UL 94 V0.
• Compliance with IEC 61810-1 and IEC 61810-3 standards.
• Test method A / group assembly; protection type RT II.
• Solder bath temperature: 270°C for 5 seconds.

Contact and Electrical Ratings

• Contact material: Silver tin oxide (AgSnO2) with 0.2 µm gold plating.
• Contact type: Crown contact.
• Rated switching power: 250 VAC, 10 A (AC1), 2500 VA.
• Electrical lifetime at AC1 (360 operations/hour): approximately 100,000 cycles.
• Maximum inrush current: 25 A for 20 ms.
• Switching voltage range: 5 to 250 V DC/VAC.
• Switching current range: 10 mA to 10 A.
• Contact resistance (new state): ≤100 mΩ at 6 V / 100 mA.

Coil Specifications

Other coil voltages available upon request.

Load and Switching Capacity

• Maximum switching capacity according to DIN EN 60947-5-1:
• AC15: 230 V / 5 A
• DC13: 24 V / 7.5 A at 0.1 Hz
• UL 508 ratings: C600 / R300.
• Maximum contact load at AC1 (230 V):
• 2 contacts: 10 A each
• 3 contacts: 8.4 A each
• 4 contacts: 7.3 A each
• 5 contacts: 6.5 A each
• 6 contacts: 6 A each
• 8 contacts: 5 A each
• 9 contacts: 4.2 A each
• Load limit curves for direct current and excitation voltage ranges are provided, indicating operational limits for inductive and resistive loads.

Relay Features and Construction

• Print relay with positively guided contacts ensuring safe separation between coil/control and output contacts (>8 mm), between output contacts (>8 mm), and between left and right contact sides (>10 mm).
• IEC 61810-3 application type A.
• Contact configurations vary by model, e.g., SIR282 (2 NO / 8 NC), SIR372 (3 NO / 7 NC), up to SIR912 (9 NO / 1 NC).
• Coil power consumption: nominal 1.3 W, holding power 0.39 W.
• Coils for railway applications per EN 50155 available on request.

Dimensions and Mounting

• Dimensions provided in millimeters with detailed pin spacing and relay size.
• Mounting position is flexible; recommended mounting distance is greater than 5 mm to avoid heat accumulation.

Additional Information

• Type of protection: RT II.
• Test method: A / group assembly.
• No options or accessories available.
• Manufacturer: ELESTA GmbH, Switzerland.