Siemens Circuit breaker for motor protection, size S3, 819A

Product Overview

Circuit breaker size S3 for motor protection, CLASS 10 A-release 45...63 A N-release 819 A screw terminal Standard switching capacity

Key Features

• Size: S3 (80 mm width)
• Current Range: 45...63 A adjustable thermal overload release
• Short-circuit Release: 819 A (N-release)
• Trip Class: CLASS 10 according to IEC 60947-4-1
• Connection System: Screw-type terminal
• Number of Poles: 3-pole
• Rated Operational Voltage: Up to 690 V AC
• Rated Frequency: 50/60 Hz

Technical Specifications

Standards Compliance:

• IEC 60947-1, IEC 60947-2, IEC 60947-4-1
• UL 508, CSA C22.2 No. 14
• UL 489 / CSA rating compliant

Operating Conditions:

• Ambient Temperature: -20°C to +60°C
• Storage Temperature: -50°C to +80°C
• Degree of Protection: IP20
• Installation Altitude: Maximum 2,000 m above sea level
• Relative Humidity: 10-95% during operation
• Net Weight: 2.234 kg

Performance Features:

• Phase failure detection for reliable motor protection
• Integrated overload and short-circuit protection
• ON/OFF rotary handle with lockout capability
• Ambient compensated up to 140°F (applies to side by side mounting)
• Test trip function for operational verification
• Adjustment dial for setting to motor FLA

Screw Terminal Connection System

• Tool Required: Standard screwdriver
• Tightening Torque: 3-4.5 N·m for main contacts
• Thread Design: M6 for main contacts
• Conductor Cross-sections: 2 x (1 to 35) mm², 1 x (1 to 50) mm²
• AWG cables: 2 x (18 to 2), 1 x (18 to 1)

Applications

• Motor protection for three-phase motors (50-60 HP range)
• Overload and short-circuit protection for high-power applications
• Industrial automation and process control applications
• Suitable for motors with rated currents between 45-63 A
• Heavy-duty industrial applications
• Group installation motor control systems
• Type E protection (self-protected combination motor controller)

Motor Power Ratings

• 230V AC: 18.5 kW (25 HP)
• 400V AC: 30 kW (40 HP)
• 500V AC: 37 kW (50 HP)
• 690V AC: 55 kW (75 HP)

UL/CSA Motor Ratings

• 115V: 5 HP (single-phase)
• 240V: 15 HP (single-phase)
• 200/208V: 20 HP (3-phase)
• 230V: 25 HP (3-phase)
• 460V: 50 HP (3-phase)
• 575V: 60 HP (3-phase)

Short-Circuit Breaking Capacity

• 100 kA at 240V AC
• 50 kA at 400V AC
• 50 kA at 440V AC
• 12 kA at 500V AC
• 6 kA at 690V AC

Service Short-Circuit Breaking Capacity (Ics)

• 100 kA at 240V AC
• 25 kA at 400V AC
• 20 kA at 440V AC
• 6 kA at 500V AC
• 3 kA at 690V AC

Installation

• Mounting: 35 mm DIN rail according to DIN EN 60715
• Package Dimensions: 80.00 x 192.00 x 172.00 mm
• Side-by-side mounting capability
• Top and bottom terminal arrangement
• Any mounting position acceptable

Compliance & Environmental

• Country of Origin: Germany
• RoHS Compliance: Since 01.03.2017
• UL/CSA Approvals: Available for North American applications
• REACH Regulation: Contains lead >0.1% w/w
• Product Class: A - Standard product, stock item

Motor Protection Benefits

• Prevents motor damage from overload conditions
• Protects against phase loss and unbalanced loads
• Extends motor life through precise current monitoring
• Superior N-release rating (819A) for high-power applications
• CLASS 10 trip characteristics for consistent performance
• Temperature compensated operation across wide ranges

Advanced Protection Features

• Extended Current Range: 45-63A suitable for large motors
• Superior Short-Circuit Protection: 819A N-release for maximum safety
• Reliable Trip Characteristics: CLASS 10 tripping for consistent performance
• Phase Loss Detection: Protects against unbalanced load conditions
• Magnetic Trip Elements: Fast response to short-circuit conditions
• Thermal Overload Protection: Accurate thermal protection for motors
• Type E Protection: Self-protected combination motor controller capability

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