DC Miniature Circuit Breaker

The SYB5-80 DC miniature circuit breaker, supplied by China-based manufacturer Zhejiang Soutya New Energy LLC, provides protection for AC 230/400V and DC 300~1200V circuits.
Key Features
▶ Common for AC and DC (AC230/400V、 DC300~1200V)
▶ No positive or negative polarity distinction, bidirectional protection, easier to installation.
▶ High breaking short arc, higher safety.

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Product Description

The SYB5-80 DC miniature circuit breaker, supplied by China-based manufacturer Zhejiang Soutya New Energy LLC, is a 300–1200 V DC and 230/400 V AC bidirectional and non-polarized miniature breaker, with a 10 KA AC / 6KA DC breaking capacity, designed for high-voltage protection in PV systems, battery energy storage systems (BESS), and electric vehicle charging equipment.

Characteristic

Short Circuit Protection, Overload Protection
Ultimate breaking capacity:10 KA AC / 6KA DC
Non-polar,bidirectional protection
Short arcing
Flame Retardant Material

Application scenarios

1.Residential & commercial PV combiner boxes

Protects 300–1200 V DC string inputs and 230 V/400 V AC inverter outputs; single-pole width doubles density in small enclosures.

2.PV-battery hybrid inverters

Bidirectional, non-polarized breaker on 300–1200 V DC battery bus handles charge and discharge currents without rewiring.

3.Small DC EV chargers (≤ 20 kW)

600–1200 V DC output bus protection; 6 kA breaking clears arc faults during plug-in/out events.

4.Telecom & data-center DC racks

Pole combinations safeguard 48 V/240 V/380 V server or UPS branches up to 1200 V DC; DIN-rail mount saves cabinet space.

5.Low-voltage DC micro-grids

380–1200 V DC distribution for LED lighting, fans or pumps; B/C/D curves match diverse load characteristics.

6.Harsh or high-altitude sites

−30 °C to +70 °C, no derating up to 2 000 m, fits IP66 enclosures for carports, agrivoltaic and rooftop plants.

Technical Parameter

Model		SGB5-80

Pole		1P	2P	3P	4P
Rated Working Voltage Ue		230VAC	400VAC	400VAC	400VAC
		300VDC	600VDC	900VDC	120VDC
Maximum frame current		80A
Rated Current In		6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A
Rated Insulation Voltage Ui		690VAC
		600V DC 900VDC 1200VDC
Rated impulse withstand voltage Uimp		8kV

Tripping characteristics		B/C/D
Tripping type		Thermal-magnetic
Ics Operational breaking capacity lcs		7.5kA(AC)6kA(DC)
Icu Ultimate breaking capacity lcu		10kA(AC)6kA(DC)
Electrical Life
Actual Average Value		Average 4000 times(AC)1000 times(DC)

Standard Specified Value		1500 times(AC)300 times(DC)

Mechanical Life
Actual Average Value		≥15000 Times
Standard Specified Value		8500 times(AC) 9700 times(DC)

Overvoltage category		Ⅲ
Pollution degree		3
Protection Level		IP40;Termina IP20
Moisture and heat resistance		Category 2
Relative Humidity		≤95%
Vibration Resistance		Basis IEC60068-2-6
Mechanical impact resistance parameters		Basis IEC60068-2-27

Wiring Capacity		25~35mm²
Wiring Torque		3.0Nm
Operating Ambient Temperature		-30℃~+70℃
Storage Ambient Temperature		-40℃~+85℃
Installation Method		DIN35
Altitude		≤2000m
Weight		0.13kg/Pole
Dimension	Length	85mm
	Width	18mm	36mm	54mm	72mm
	Height	Max78mm
Package	Pcs/Box	12	6	4	3
	Box/Carton	10
	Carton/Pallet	80
Storage		The product should be stored in a well-ventilated warehouse, with relative humidity not exceeding 80%, and the ambient temperature should be between -40℃ and+80℃.Additionally, there should be no acidic, alkaline, or corrosive gases present.

DC Wiring Diagram

DC Miniature Circuit Breaker

Appearance and Installation Dimensions

DC Miniature Circuit Breaker

Derating Factor

Temperature Derating Factor Table

Temperature	-30℃	-25℃	-20℃	-15℃	-10℃	-5℃	0℃	5℃	10℃	15℃
Rated Operating Current Coefficient	1.279	1.261	0.242	1.223	0.204	1.182	1.161	1.143	1.127	1.103


Temperature	20℃	25℃	30℃	40℃	45℃	50℃	55°C	60℃	65°C	70℃
Rated Operating Current Coefficient	1.079	1.063	1.047	1	0.984	0.968	0.952	0.922	0.904	0.891

Altitude Derating Factor Table

Altitude /m	2000	3000	4000	5000
Rated working Current Coefficient	1	0.96	0.91	0.86
Rated working Voltage Coefficient	1	1	1	1
Rated Power Frequency Withstand Voltage Coefficient	1	0.9	0.82	0.71
Rated Impulse Withstand Voltage Coefficient	1	0.9	0.82	0.71
Rated Limit Short-circuit Segment Capacity and Electrical Life Coefficient	1	0.82	0.7	0.6
	1	0.82	0.7	0.6

Derating factor table for side-by-side installation of MCBS

No.of MCB	1	2~3	4~5	6~8	9~10
In≤25A Coefficient	1	0.96	0.9	0.8	0.7
32A≤In≤63A Coefficient	1	0.92	0.8	0.7	0.6
80A≤In≤125A Coefficient	1	0.9	0.8	0.7	/

Accessory

MX auxiliary release device
Rated Control Voltage Us	DC:24~48V AC:110~230V
Maximum Tripping Time	<10ms
Coil Resistance	50
Limit current	≥1.6A
Mechanical Life	10000times
Electrical Life	4000times
Wiring torque	0.8N ·m
Wiring capability	1.0mm²Hard wire
	1.0mm²Soft wire with terminal lugs
Operating Temperature Range	-30℃~+70℃


Environmental conditions	There should be no explosive hazardous substances, and no harmful gases or conductive dust that can corrode or damage insulation
Assembly position	To the left side of the circuit breaker

Installation conditions	DIN35mm standard rail mounting

Auxiliary contact OF
Contact breaking capacity	AC13:le=3A;Ue=250V
	AC15:le=2A;Ue=250V
	DC12:le=0.5A;Ue=110V
Minimum Operating Voltage	5V
Minimum Operating Current	10mA
Rated Insulation Voltage	500V
Rated limited short-circuit current	1000A
Agreed heating current Ith	4A
Mechanical Life	10000(times)
Electrical Life	4000(times)
Wiring torque	0.8N ·m
Wiring capability	1.0mm²
Number of contacts	1 normally open, 1 normally closed

Operating Temperature Range	-30℃~+70℃


Environmental conditions	There should be no explosive hazardous substances, and no harmful gases or conductive dust that can corrode or damage insulation
Assembly position	To the left side of the circuit breaker

Installation conditions	DIN 35mm standard rail mounting

Zhejiang Soutya New Energy LLC

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Contact Info

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Address

East of No.148, Wei 12th Road, Economic Development Zone,Yanpan Subdistrict,Yueqing City,Wenzhou,Zhejiang Province,China
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Tel

+86-13757759651
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E-mail

sales@soutya.com

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