Mini circuit breaker electro base DS3-16A-C three-phase 16 A C-curve

The Mini circuit breaker electro base DS3-16A-C three-phase 16 A C-curve is a compact thermal-magnetic protective device for three-phase electrical installations. Designed for DIN-rail mounting in distribution boards, it provides overcurrent and short-circuit protection with a C-type trip characteristic suitable for circuits with moderate inrush currents. The breaker’s compact dimensions and standardized rail clip allow straightforward installation and replacement in residential, commercial and light industrial switchboards.

Advantages

This three-phase mini circuit breaker combines consistent thermal protection against prolonged overloads with fast magnetic response to short circuits. The C-curve characteristic balances sensitivity and tolerance to temporary inrush currents from motors and transformers, reducing nuisance trips while maintaining safety. Its DIN-rail form factor and clear rating marking simplify wiring, inspection and maintenance.

Suitable for

• Protection of three-phase lighting and power circuits in homes and small businesses
• Control circuits and distribution lines with moderate motor startup currents
• Replacement or upgrade of compact distribution boards and panel installations

Key specifications

• Type: three-phase miniature circuit breaker
• Rated current: 16 A
• Trip curve: C-characteristic (thermal-magnetic)
• Mounting: DIN-rail (standard profile)
• Pole count: three poles
• Function: overcurrent and short-circuit protection
• Construction: compact housing for distribution boards

How to use

Install the DS3-16A-C on a standard DIN rail inside a distribution board. Ensure power is isolated before connecting conductors. Connect the three phase conductors to the top terminals and corresponding load conductors to the bottom terminals following the panel’s wiring diagram. Tighten terminal screws to the manufacturer’s recommended torque and verify correct polarity and phase sequence. After installation, switch the breaker on and perform functional checks to confirm circuit continuity and correct operation under normal load conditions.

Usage recommendations

Use this breaker where a C-characteristic is appropriate — typically circuits with moderate inrush currents such as small motors, HVAC components or transformer-fed loads. Match the breaker’s rated current to the design load plus expected operating margin, and coordinate with upstream protection devices. Periodically inspect terminals for tightness and signs of overheating; replace the device if any mechanical damage or persistent nuisance tripping occurs.