Product Overview
Product Details
Data Download
Related Products

YCB8-125PV

Picture

Video

YCB8-125PV

General

The rated operating voltage of YCB8-125PV series DC miniature circuit breakers can reach DC1000V, and the rated operating current can reach 125A, which are used for isolation, overload and short circuit protection. It is widely used in photovoltaic, industrial, civil, communication and other systems, and can also be used in DC systems to ensure the reliable operation of DC systems.

Standard: IEC/EN 60947-2.

Product Details

Responsive 3D Model

YCB8-125PV Photovoltaic DC MCB by cncelectric on Sketchfab

Selection

YCB8	-	125	PV	4P	63	DC250	+	YCB8-63 OF
Model		Shell grade current	Usage	Number of poles	Rated current	Rated coltage		Accessories
Miniature circuit breaker		125	PV: heteropolarity Pvn: nonpolarity	1P	63A,80A, 100A, 125A	DC250V		YCB8-125 OF: Auxiliary
				2P		DC500V		YCB8-125 SD: Alarm
				3P		DC750V		YCB8-125 MX: Shunt
				4P		DC1000V

Note: The rated voltage is affected by the number of poles and wiring mode.
The single poleis DC250V, the two poles in series are DC500V, and so on.

Technical data

Standard		IEC/EN 60947-2
Number of poles		1p	2p	3p	4p
Rated current of shell frame grade		125
Electrical performance
Rated working voltage Ue(V DC)		250	500	750	1000
Rated current In(A)		63、80、100、125
Rated insulation voltage Ui(V DC)		1000V
Rated impulse voltage Uimp(KV)		6
Ultimate breaking capacity Icu(kA)		Pv：6 PVn：10
Operation breaking capacity Ics(KA)		PV：Ics=100%Icu PVn：Ics=75%Icu
Curve type		li=10ln
Tripping type		Thermomagnetic
Service life (time)	Mechanical	20000
	Electrical	PV：1000 PVn：300
Inline methods		Can be up and down into the line
Electrical accessories
Auxiliary contact		□
Alarm contact		□
Shunt release		□
Applicable environmental conditions and installation
Working temperature(℃)		-35~+70
Storage temperature(℃)		-40~+85
Moisture resistance		Category 2
Altitude(m)		Use with derating above 2000m
Pollution degree		Level 3
Protection degree		IP20
Installation environment		Places without significant vibration and impact
Installation category		Category III
Installation method		DIN35 standard rail
Wiring capacity		2.5-50mm²
Terminal torque		3.5N·m

■ Standard □ Optional ─ No

Wiring diagram

Note:
L+power supply positive pole
L-power cathode
Positive pole of circuit breaker
Negative pole of circuit breaker

Overall and mounting dimensions(mm)

Tripping characteristics

Circuit breaker under normal installation conditions and reference ambient temperature (30~35)℃

Tripping type	DC current	Initial state	Appointed time	Expected results
All types	1.05In	Cold state	t≤2h	No tripping
All types	1.3In	Thermal state	t<2h	Tripping
Ii=10In	8In	Cold state	t≤0.2s	No tripping
Ii=10In	12In	Cold state	t<0.2s	Tripping

Curve

Temperature correction factor table

Current correction value for different ambient temperatures

Rated current(A)	Temperature (℃)	-25	-20	-10	0	10	20	30	40	50	60
63A		77.4	76.2	73.8	71.2	68.6	65.8	63	60	56.8	53.4
80A		97	95.5	92.7	89.7	86.6	83.3	80	76.5	72.8	68.9
100A		124.4	120.7	116.8	112.8	108.8	104.5	100	95.3	90.4	87.8
125A		157	152.2	147.2	141.9	136.5	130.8	125	118.8	112.3	105.4

Use of derating table at high altitude

Current correction factor at different altitudes

Rated current(A)	Current correction factor
Rated current(A)	≤2000m	2000-3000m	≥3000m
63, 80, 100, 125	1	0.9	0.8

Example: If a circuit breaker with a rated current of 100A is used at an altitude of 2500m,
the rated current must bederated to 100A×90%=90A

Power consumption per pole of circuit breaker and wiring size

Rated current In(A)	Nominal cross-section of copper conductor(mm²)	Maximum power consumption per pole(W)
63	16	13
80	25	15
100	35	15
125	50	20

Accessories

The following accessories are suitable for YCB8-125PV series, which can provide the functions of remote control of circuit breaker, automatic disconnection of fault circuit, status indication (breaking/closing/fault tripping)

a. The total width of the accessories assembled is within 54mm, the order and quantity from left to right: OF, SD(3max)+MX, MX+OF, MV+MN, MV(1max)+MCB; SD can only assemble up to 2 pieces ;
b. Assembled with the body, no tools required;
c. Before installation, check whether the technical parameters of the product meet the requirements of use, and operate the handle to open and close several times to check whether the mechanism is reliable.

Miniature circuit breaker accessories

● Auxiliary contact OF
Remote indication of closing/opening status of circuit breaker.
● Alarm contact SD
When the circuit breaker fault trips, it sends out a signal, together with a red indicator on the front of the device. ● Shunt release MX
When the power supply voltage is 70%~110%Ue, the remote control circuit breaker trips after receiving the signal.
● Minimum making and breaking current: 5mA(DC24V)
● Service life: 6000 times (operating frequency: 1s)

MX+OF Outline and installation dimensions

Technical data

Model	YCB8-125 OF	YCB8-125 SD	YCB8-125 MX
Appearance
Types
Number of contacts	1NO+1NC	1NO+1NC	/
Control voltage(V DC)			110-415 48 12-24
Working current of contact	AC-12 Ue/Ie: AC415/3A DC-12 Ue/Ie: DC125/2A		/
Shunt control voltage			Ue/Ie: AC:220-415/ 0.5A AC/DC:24-48/3
Width(mm)	9	9	18
Applicable Environmental Conditions and Installation
Storage temperature(℃)	-40℃~+70℃
Storage humidity	The relative humidity does not exceed 95% when at +25℃
Protection degree	Level 2
Protection degree	IP20
Installation environment	Places without significant vibration and impact
Installation category	Category II 、Category III
Installation method	TH35-7.5/DIN35 rail installation
Maximum wiring capacity	2.5mm²
Terminal torque	1N·m