Siemens 5SY17044 SENTRON 5SY Miniature Circuit Breaker, 1-Pole, C, 4 A, 72 V DC, 10 kA, Sealable

The Siemens 5SY17044 stands out as a sealable 1-pole miniature circuit breaker engineered for DC circuits up to 72 V. Its C tripping characteristic and 10 kA switching capacity make it a reliable choice for protecting cables and devices in industrial and building installations where short-circuit currents can be high.

Highlights

• Sealable design prevents unauthorized switching or tampering
• Rated for 4 A at 72 V DC, ideal for DC control circuits
• Compact DIN rail mounting saves space in distribution boards
• High mechanical and electrical endurance: 10,000 operating cycles

In daily use

Install the 5SY17044 on a standard 35 mm DIN rail and connect solid or stranded conductors from 0.75 to 35 mm² via screw terminals. The breaker trips magnetically on short circuits and thermally on overloads, protecting downstream equipment. Its IP20 terminal protection and IP40 front cover provide basic safety in dry environments.

Full specifications

• Product type: Miniature circuit breaker (MCB)
• Series: SENTRON 5SY
• Number of poles: 1
• Tripping characteristic: C
• Rated current: 4 A
• Rated voltage: 72 V DC
• Rated switching capacity: 10 kA
• Frequency: DC
• Mounting type: DIN rail (EN 60715)
• Degree of protection: IP20 (terminals), IP40 (front)
• Ambient operating temperature: -25 to +55 °C
• Connection type: Screw terminals
• Terminal capacity (solid): 0.75 - 35 mm²
• Terminal capacity (stranded): 0.75 - 25 mm²
• Mechanical endurance: 10,000 cycles
• Electrical endurance: 10,000 cycles
• Sealable: Yes
• Overvoltage category: III
• Pollution degree: 2

Final note

With its sealable feature and robust DC rating, the 5SY17044 is a dependable component for professional electrical installations requiring circuit protection in DC systems.