QO250 2-Pole 50A Circuit Breaker QO250CP Replacement

Name: QO250 2-Pole 50A Circuit Breaker QO250CP Replacement
Brand: NewTrend or OEM
SKU: 1600985302506

Rated Frequency:50/60hz
Mounting type:plug-in mount
Type:Mini
BCD Curve:C
Brand Name:NewTrend or OEM
Application:Household
Material:Plastic
Place of Origin:China
Model Number:QO
Poles Number:2
Breaking Capacity:10kA

Poles

Rated Current

Rated Voltage

SKU: 1600985302506 Category: Others

Description

Product Description:

QO Type circuit breakers are equipped with the indicator. When a circuit breaker trips, the handle snaps to a midpoint position between “OFF” and “ON” and a highly visible, red indicator easily identifies the tripped breaker. This enables you to easily distinguish which breaker has tripped in a load center that may contain up to 60 different circuit breakers. QO circuit breakers have features no other manufacturer can offer. They come in many different sizes and can meet the needs of virtually every function in your home or business. These types of quality, industry exclusive products keep ahead of the competition and are builders’ and electrical contractors’ first choice in electrical protection.

QO Circuit Breakers
	Ampere Rating	Catalog Number
	Ampere Rating	1 Pole 120/240 Vac	2 Pole 120/240 Vac	3 Pole 240 Vac
	10A	QO110	QO210	QO310
	15A	QO115	QO215	QO315
	20A	QO120	QO220	QO320
	25A	QO125	QO225	QO325
	30A	QO130	QO230	QO330
	35A	QO135	QO235	QO335
	40A	QO140	QO240	QO340
	45A	QO145	QO245	QO345
	50A	QO150	QO250	QO350
	60A	QO160	QO260	QO360
	70A	QO170	QO270	QO370
	80A		QO280	QO380
	90A		QO290	QO390
	100A		QO2100	QO3100
	110A		QO2110
	125A		QO2125

Additional information

Weight	0.3 kg
Dimensions	10 × 10 × 10 cm
Rated Current	60A, 25A, 20A, 15A, 35A, 50A, 10A, 30A, 40A
Rated Voltage	120/240VAC
Poles	2P

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for QO250 2-Pole 50A Circuit Breaker QO250CP Replacement.

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Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.

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2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.

Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.