4P 125A DC Circuit Breaker 1000V for Solar and Battery Systems SAA-241018-EA

Description

1000V DC overcurrent protection at 125A.

The Projoy PEBS-H-125 125A 4 pole DC MCB clears overloads and short circuits on high-voltage DC circuits up to 1000V DC. It pairs C curve thermal magnetic tripping with 6kA ultimate and service breaking capacity, and carries Australian SAA approval SAA-241018-EA.

Key Features

• Rated current 125A on a 125A frame
• 4 pole, maximum working voltage (Ue) 1000V DC
• C curve tripping, instantaneous release at 8In
• Icu 6kA and Ics 6kA
• Rated insulation voltage 1200V, impulse withstand 6kV
• Terminals take 6-50mm² conductors at 3.5 N·m
• Ambient temperature range -30°C to +70°C
• 108mm wide (27mm per pole), 35mm DIN rail mount
• According to EN 60947-2 and AS/NZS IEC 60947.2
• SAA approval no. SAA-241018-EA (AS/NZS IEC 60947.2:2015)

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Why it Matters

Voltage rises with every pole
The PEBS-H-125 series is built in 1 to 4 pole versions, and its maximum working voltage steps up with each pole: 250V DC for 1P, 500V DC for 2P, 750V DC for 3P and 1000V DC for 4P. This 4 pole model is the top of the range, so choose it where the DC system voltage reaches beyond 750V and stays within 1000V. Direct current has no natural zero crossing to help extinguish a fault arc, which is why a breaker with a published DC rating matters on these circuits.

SAA certified for Australia
SAA Approvals Pty Ltd certifies the PEBS-H-125 to AS/NZS IEC 60947.2:2015 under certificate SAA-241018-EA. The certificate lists the 4 pole version at DC1000V with rated currents of 80, 100 and 125A, Ui 1200V, Uimp 6kV and Icu = Ics = 6kA. It is valid until 25 July 2029.

Installation and derating
Projoy's harness table specifies 1 AWG (50mm²) copper for the 125A rating, tightened to 3.5 N·m. Rated current is referenced at 30°C, and Projoy publishes temperature coefficients from -30°C to +70°C plus altitude coefficients above 2000m, so apply them in hot enclosures or elevated sites. Wire the poles to the 4P contact configuration diagrams in the datasheet. Optional MX shunt trip and OF auxiliary contact modules are listed for the series and sold separately. Installation must be carried out by a licensed electrician to AS/NZS 3000.

Q: What is the SAA approval number for the Projoy PEBS-H-125 125A 4 pole breaker?
A: It is SAA-241018-EA, issued by SAA Approvals Pty Ltd to AS/NZS IEC 60947.2:2015. The certificate covers model PEBS-H-125 at 80, 100 and 125A, including the 4 pole DC1000V version.

Q: What cable size suits a 125A PEBS-H-125?
A: Projoy specifies 1 AWG (50mm²) copper at 125A with a terminal torque of 3.5 N·m. The terminals accept 6-50mm². Final cable selection should follow AS/NZS 3008.1.1 for your installation conditions.

Q: How many operations is the PEBS-H-125 125A rated for?
A: Projoy lists a standard electrical life of 200 cycles at 125A, with actual life exceeding 200 cycles. Standard mechanical life is 10,000 cycles, and actual mechanical life exceeds 20,000 cycles.