Rated operational current DC-3 (A): 12 Rated operational voltage (V DC): 350 Rated insulation voltage (V DC): 1500 Coil control voltage AC/DC (V): 24/48/110/220 Coil operating power consumption (W): ≤11 Electrical life DC-3 (operations): 300×10⁴ Mechanical life (operations): 300×10⁴ Mounting method: DIN rail / Screw Auxiliary contacts: 01 (1NC) / 10 (1NO)

Product Description

1. Application

The QNBZ brake contactor is suitable for circuits with a rated operational voltage up to 350V and a rated operational current of 12A under DC-3 duty. This product is specifically designed for elevator brake systems, serving as the preferred contactor for elevator brake control. It can also be used for remote switching and breaking of circuits, frequent starting, and control of AC motors, electromagnetic coils, etc. It is particularly suitable for making and breaking circuits with high voltage and inductive loads. In elevator brake systems, the contactor controlling the brake electromagnet is crucial for ensuring normal elevator operation. The product design focuses on solving contact reliability and high-voltage arc extinction issues. The use of arc chutes and magnetic blowout significantly improves contact reliability and service life. This product greatly addresses the persistent problems of arcing-induced burning, erosion, and contact welding in brake contactors. Its introduction to the market will effectively enhance elevator operational reliability and safety. Product design complies with standards: IEC/EN 60947-4-1, GB/T 14048.1, GB/T 14048.4. Product certifications: CCC certification.

2.Coding

QN BZ □ □

1 2 3 4

Figures	Coding
1	Company code: QN represents Nanjing Quanning Electric Co., Ltd.
2	BZ: Brake Contactor
3	DC-3 load, Rated operational current: 12A; Auxiliary contact: 1NO 'or' 1NC
4	Coil Voltage (Us)

3.Key Points

▲ Operating mechanism is direct-acting; contacts are four-break, ensuring more reliable making and breaking. ▲ Rapid arc extinction when the main circuit opens. ▲ Can be installed using screws or on 35mm DIN rail. ▲ Control supply voltage is categorized based on different usage requirements: DC control and AC control. ▲ Compact size, lightweight, long electrical life, high reliability, and silent operation when pulled in. ▲ Manufacturing materials are environmentally friendly, complying with the EU RoHS 2.0 directive. ▲ No toxic or harmful substances are produced during the manufacturing process. ▲ All products comply with the EU RoHS 2.0 environmental directive. ▲ Products are manufactured using advanced production processes to ensure quality.

4. Operating and Mounting Conditions

▲ Ambient air temperature: -25°C to +60°C. ▲ Ambient humidity: Maximum relative humidity 85%. ▲ Altitude at installation site not exceeding 3000m. ▲ Vibration frequency at mounting point: 1～50Hz (Frequency 1～10Hz, amplitude 25/f; Frequency 10～50Hz, amplitude 250/f). ▲ Pollution degree at the contactor installation site: Degree 3. ▲ Contactor installation category: Category III. ▲ Contactor degree of protection: IP20. ▲ Inclination of the mounting surface relative to the vertical plane: Not more than ±5°. ▲ Impact acceleration product can withstand: 30 m/s². ▲ Mounting methods: Screw mounting, 35mm standard DIN rail mounting. ▲ Applicable duty types: Uninterrupted duty, intermittent periodic duty. ■ Torque Applied to Terminal Screws

Screw	Rated Torque (Nm)	Maximum Torque (Nm)	National Standard Torque (Nm)
M3	0.5	1	0.5
M3.5	0.8	1.2	0.8

5. Technical Parameters

Specifications Parameters		QNBZ-1201	QNBZ-1210
Contact Configuration		2P (Main) + 1NC (Auxiliary)		2P (Main) + 1NO (Auxiliary)
Rated insulation voltage Ui (V)		1500
Rated operational voltage Ue (V DC)		350
Rated operational current Ie (A) DC-3		12
Minimum make load		24V/200mA
Auxiliary Contact Parameters	Conventional free-air thermal current Ith (A)	10
	Minimum make load	5V/3mA
Coil	Coil voltage Us (V DC/AC)	12、24、110、220
	Pick-up voltage (V DC/AC)	0.75Us～1.10Us
	Drop-out voltage (V DC/AC)	0.10Us～0.55Us
	Pick-up current (A)	<0.8
	Hold current (A)	<0.8
	Pick-up time (ms)	<40
	Drop-out time (ms)	<70
Electrical life (DC-3)		300 × 10⁴ operations
Mechanical life		300 × 10⁴ operations
Operating rate (ops/h)		1200
Insulation resistance (MΩ)		10 (at 500V DC)
Main circuit bolt tightening torque (N·m)		M3.5 bolt: 0.8 ~ 1.2
Dielectric strength	Between coil and contacts	AC 3500V / 1 Min, no breakdown or flashover, leakage current ≤5mA
	Between open contacts	AC 3500V / 1 Min, no breakdown or flashover, leakage current ≤5mA
Temperature rise	Coil (at Us)	≤70K
	Terminals (at Ie)	≤40K
	Housing	＜60K
Enameled wire	Temperature resistance	≤180℃
	Insulation class	Class H
	Withstand voltage (enamel to ground)	1000V / 1 Min, no breakdown or flashover, leakage current ≤5mA
Weight (kg)		Approx. 0.5

6. Outline and Mounting Dimensions

QNBZ-1201/1210

7. Wiring Diagrams (Do not reverse polarity)

1. Main Circuit Wiring Diagram

2. Auxiliary Contact Wiring Diagram

8. Ordering Information

■ Please specify the control voltage type (AC or DC) of the contactor coil. For special voltage requirements, products can be specially ordered according to user requirements. Example: QNBZ-1210 / DC220V, 1 unit; This indicates one 12A brake contactor, main contacts 2NO, auxiliary contact 1NO, coil voltage DC220V.

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