3RV6021-4CA15 Siemens SIRIUS Motor Breaker – 22 A 3RV6 Series

Product Introduction

• 3RV6021-4CA15 – motor protection circuit breaker from Siemens.
• Part of the SIRIUS family.
• Series: 3RV6.
• Size: S0.
• Protects motors from overload and short circuits.
• Current setting: 16 to 22 A.
• Rated operational current: 22 A at 400 V.
• Breaking capacity: 55 kA at 400 V.
• Weight: 380 g.

Technical Specifications

• Manufacturer: Siemens
• Brand: SIRIUS
• Product Type: Motor Protection Circuit Breaker
• Model: 3RV6021-4CA15
• Series: 3RV6
• Frame Size: S0
• Poles: 3
• Adjustable Overload Trip: 16‑22 A
• Rated Current (Ie): 22 A
• Rated Voltage (Ue): 690 V
• Frequency: 50‑60 Hz
• Short‑Circuit Trip (magnetic): 286 A
• Breaking Capacity (Icu) at 400 V: 55 kA
• Service Breaking Capacity (Ics) at 400 V: 25 kA
• Trip Class: CLASS 10
• Overload Release Type: Thermal
• Short‑Circuit Release Type: Magnetic

Measurements & Environment

• Dimensions: 97 x 45 x 97 mm (H x W x D).
• Mounting: any position, DIN rail or screw.
• Spacing: 50 mm up/down, 30 mm side.
• Temperature (operation): -20°C to +60°C.
• Temperature (transport): -50°C to +80°C.
• Humidity: 10‑95% (operation).
• Altitude: up to 2000 m.
• Protection (front): IP20, finger‑safe.

Power & Performance

• Power loss (total): 8 W typical.
• Power loss per pole: 3.5 W (at rated current).
• Insulation voltage: 690 V.
• Surge voltage resistance: 6 kV.
• Shock resistance: 25 g / 11 ms.
• Max operating frequency (AC‑3): 15 operations/hour.

Terminals & Connections

• Main circuit: screw terminals (top and bottom).
• Conductor sizes (solid): 2x (1‑2.5 mm²), 2x (2.5‑10 mm²).
• Conductor sizes (fine stranded): 2x (1‑2.5 mm²), 2x (2.5‑6 mm²), 1x 10 mm².
• Auxiliary contacts: screw terminals.
• Auxiliary conductor sizes: 2x (0.5‑1.5 mm²), 2x (0.75‑2.5 mm²).
• Tightening torque (main): 2‑2.5 N·m.
• Tightening torque (auxiliary): 0.8‑1.2 N·m.

Installation Guide

• Mount on 35 mm DIN rail (EN 60715).
• Use screw terminals for secure wiring.
• Set overload current (16‑22 A) via dial.
• Keep spacing: 50 mm up/down, 30 mm side.
• Ensure proper torque for connections.

Commissioning & Maintenance

• Test trip function before operation.
• Check settings match motor full‑load current.
• Inspect terminals for tightness yearly.
• Replace if short‑circuit capacity is exceeded.

Compatibility

• Works with Siemens SIRIUS systems.
• For 3‑phase motors up to 22 A (400 V).
• Compatible with class 10 overload relays.
• Can be used with motor starters and contactors.

Certifications

• CE marked.
• UL recognized.
• RoHS compliant.
• IEC 60068‑2‑27 shock tested.

Package Contents

• 1 x 3RV6021-4CA15 circuit breaker
• Mounting clips for DIN rail
• Instruction sheet

Warranty & Shipping

• 12‑month warranty against defects.
• 24‑hour dispatch on business days.
• Shipping via FedEx, UPS, or DHL.

Expert Review

• “The 3RV6021-4CA15 is a robust motor protector. Its 55 kA breaking capacity handles severe faults. The CLASS 10 trip matches most industrial motors. Easy to set and reliable in harsh conditions.” – Senior Electrical Engineer

Manager’s Insight

• “This breaker simplifies inventory with its wide current range. The screw terminals are tool‑friendly and secure. For maintenance teams, the clear dial settings reduce errors. A trusted choice for motor control panels.” – Product Manager

Suitable Devices & Applications

• Devices: 3‑phase motors, pumps, fans, compressors, conveyors.
• Applications: motor control centers, automation panels, HVAC, material handling, water treatment.

Frequently Asked Questions

• Q: What is the adjustable current range of this breaker?
• A: 16 to 22 A (overload setting).
• Q: Can I mount it on a DIN rail?
• A: Yes, it fits standard 35 mm DIN rails.
• Q: What is the short‑circuit trip level?
• A: 286 A (magnetic release).
• Q: Is it suitable for 690 V systems?
• A: Yes, rated insulation voltage is 690 V.
• Q: What does CLASS 10 mean?
• A: It trips within 10 seconds at 7.2x overload current.

Buying Guide

• Check motor full‑load current – must be within 16‑22 A.
• Verify system voltage – up to 690 V AC.
• Calculate short‑circuit capacity – ensure Icu ≥ 55 kA.
• Select auxiliary contacts if needed (sold separately).
• Keep spare units for critical motors.

Compare with Similar Models

• 3RV6021-4CA15 – 16‑22 A, CLASS 10, S0 frame.
• 3RV6011-4CA15 – same range but lower breaking capacity.
• 3RV6021-4CB15 – similar but with different terminal type.

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