Home >> Products >>High-Performance, Low-Power Consumption DC Contactor >>QNZ1-QR Series DC Contactor with Built-in Resistor, Micro-power Type >> QNZ1-300QR Built-in Resistor Micro-power DC Contactor (Aux. Contacts Opt.)

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QNZ1-QR Series DC Contactor with Built-in Resistor, Micro-power Type

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Product Detail

QNZ1-300QR Built-in Resistor Micro-power DC Contactor (Aux. Contacts Opt.)

Rated operational current (A): 300

Rated operational voltage (V DC): 60 Rated insulation voltage (V DC): 1500 Coil control voltage (V): DC24/48 Coil operating power consumption (W): 0.5 Coil connection method: Terminal pin / External lead Electrical life (operations): 2 ×10⁴ Mechanical life (operations): 20 ×10⁴ Mounting method: Straight plate / Bent plate Auxiliary contacts: Optional (11/20/02)

Product Description

1. Application

The QNZ1-QR series DC contactors with built-in resistor and micro-power consumption are used as bypass isolation switches in variable frequency drives, soft starters, high-frequency heating power supplies, or other similar DC-20 loads. They can also be used in circuits with a working voltage of 60V or below under DC-1 load conditions.

Compliance Standards: IEC/EN 60947-4-1, GB/T 14048.4.
Product Certifications: CCC, CE, TUV, UL, RoHS.

2. Model Number and Its Meaning QN Z 1 - □ Q X B F□ □ R Position Description 1 Enterprise Code. QN represents Nanjing Quanning Electric Co., Ltd. 2 Z: DC Contactor 3 1: Design Serial Number 4 Basic Specification Code, indicated by the numerical value of the rated current Ie 5 Product Series Code. Q indicates micro-power consumption type. 6 Model Code. Default: None, indicates standard model. X indicates X-type model. 7 Contact Configuration. Default: None, indicates one normally open main contact. B indicates one normally closed main contact. 8 Auxiliary Contacts. Default: None. Can be added: F11 (one NO, one NC), F20 (two NO), F02 (two NC). 9 Coil Voltage Us 10 Product Code. Default: R. RR indicates with built-in buffer resistor.2.Coding

Figures	Coding
1	Enterprise Code. QN represents Nanjing Quanning Electric Co., Ltd.
2	Z: DC Contactor
3	1: Product series
4	Basic Specification Code, the rated current Ie
5	Q indicates micro-power consumption type.
6	Model Code. Default: None, indicates standard model. X indicates X-type model.
7	Contact Configuration. Default: None, indicates one normally open main contact. B indicates one normally closed main contact.
8	Auxiliary Contacts. Default: None. Can be added: F11 (one NO, one NC), F20 (two NO), F02 (two NC).
9	Coil Voltage Us
10	Product Code. Default: R. RR indicates with built-in buffer resistor.

3. Key Points

▲ Built-in buffer resistor structure eliminates the need for installing additional charging resistors, saving customer cost while maintaining virtually the same space and volume. ▲ Coil with micro-power consumption technology, featuring high efficiency, energy saving, and surge protection. The coil itself does not generate heat. ▲ Strong resistance to shock and vibration. High contact pressure, silver alloy contacts ensure reliable connection, low contact temperature rise, and strong overload capacity. ▲ Rare earth strong magnetic arc extinguishing, long electrical lifespan, strong anti-welding performance, safe and reliable. ▲ High insulation performance, withstands 3500V power frequency voltage. ▲ Complies with EU RoHS environmental directive and national energy-saving and environmental protection requirements. ▲ Two coil connection options: Fixed terminal block method and flexible lead wire method. *(Note: 600-1200QR models are only available with lead wires).

4. Operating and Installation Conditions

▲ Ambient Temperature: -40°C to +85°C. ▲ Ambient Humidity: Maximum relative humidity 85%. ▲ When the installation site altitude exceeds 2000 meters, derate by 5% for every additional 1000 meters. Maximum altitude should not exceed 5000 meters. ▲ Sinusoidal sweep frequency vibration at the mounting point: 10–500 Hz (Frequency 10–50 Hz, Amplitude 2.5mm; 50–200 Hz, Amplitude 0.16mm; 200–500 Hz, Acceleration 50 m/s²). ▲ Pollution Degree: Pollution Degree 3. ▲ Installation Orientation: Horizontal or vertical. ▲ Mounting Method: Screw mounting. ▲ Applicable Duty Cycle: Uninterrupted duty, Intermittent periodic duty.

5. Technical Parameters

This series complies with standards: IEC/EN 60947-4-1, GB/T 14048.4.

Specifications Parameters		QNZ1-300QR
Contact Configuration		1P (NO or NC); 1P (NO or NC) + F11, F20, F02
Rated Insulation Voltage Ui (V)		1500
Bypass Operating Voltage Un (VDC)		1500
Rated Operational Voltage Ue (VDC)		60
Rated Operational Current Ie (A) DC-1		300
Contact Voltage Drop Ud (mV)		≤95
Polar Impedance Z (mΩ)		≤0.4
Buffer Resistor R (Ω)		/
Resistor Engagement Frequency		Under DC780V, engagement interval ≥10min
Min. Connectable Load		24V 200mA
Auxiliary Contact Parameters		Ith: 10A; DC-12: Ue/Ie: 24V/10A; DC-12: Ue/Ie: 48V/4A; DC-12: Ue/Ie: 220V/1A.
Control Coil	Coil Voltage Us (VDC)	24, 48
	Pick-up Voltage (VDC)	0.85Us to 1.10Us
	Drop-out Voltage (VDC)	0.10Us to 0.75Us
	Pick-up Current (A)	0.5–1.5, see appendix for details
	Holding Current (A)	0.001–0.05, see appendix for details
	Pick-up Power (W)	30–40, see appendix for details
	Holding Power (W)	0.5, see appendix for details
	Recommended Power Supply	Switching power supply; PWM modulated power supply with 100% duty cycle; Rectifier-filtered power supply with ripple factor <5%
	Optional Power Supply (Customized)	DC square wave power supply; Rectifier-filtered power supply with ripple factor >5%
Electrical Life	DC-1, Ue, Ie (10k operations)	2
Operating Frequency (operations/hour)		300 (1 operation every 12 seconds, on/off interval not less than 0.5s)
Mechanical Life (10k operations)		20
Overload Performance (A)		1.5Ie/30min; 3Ie/1min; 5Ie/10s; 8Ie/1s; other data refer to overload curve graphs
Operate Time	Pick-up Time (ms)	≤600
Operate Time	Drop-out Time (ms)	≤50
Main Contact Wire or Busbar Cross-sectional Area (mm²)		185
Main Contact Terminal Tightening Torque (N.m)		M8 bolt: 6.0–9.0
Insulation Resistance (MΩ)		≥5 (500VDC)
Dielectric Strength	Between Coil and Contacts	AC 3500V/1Min, no breakdown or flashover, leakage current ≤5mA
Dielectric Strength	Between Open Contacts	AC 3500V/1Min, no breakdown or flashover, leakage current ≤5mA
Temperature Rise	Coil (at Us)	≤15K
	Terminal (at Ie)	≤65K
	Housing	＜60K
Enameled Wire	Temperature Resistance	≤180℃
	Insulation Class	Class H
	Dielectric Strength (Enamel to Ground)	AC 1000V/1Min, no breakdown or flashover, leakage current ≤5mA
Weight (kg)		Approx. 0.3

Appendix: Coil Parameters

Coil Voltage (VDC)	Starting Current (A)	Holding Current (A)	Pick-up Power (W)	Holding Power (W)
24	≤1.5	≤0.02	≤36	≤0.48
48	≤1	≤0.01	≤48	≤0.48

QNZ-QR Overload Current vs Time Curves:

6. Outline and Mounting Dimensions (Same for NO and NC Types)

300QR 300QR 300QR 300QR

Bent Plate - Terminal Block Bent Plate - Lead Wire Straight Plate - Terminal Block Straight Plate - Lead Wire

300QRR 300QRR 300QRR 300QRR

No Plate - Terminal Block No Plate - Lead Wire Bent Plate - Terminal Block Bent Plate - Lead Wire

300QRR 300QRR 300QRR 300QRR

Straight Plate - Terminal Block Straight Plate - Lead Wire No Plate - Terminal Block No Plate - Lead Wire

300QFR 300QFR 300QFR 300QFR

Bent Plate - Terminal Block Bent Plate - Lead Wire Straight Plate - Terminal Block Straight Plate - Lead Wire

300QFR 300QFR 300QFR 300QFR

No Plate - Terminal Block No Plate - Lead Wire Bent Plate - Terminal Block Bent Plate - Lead Wire

300QFRR 300QFRR 300QFRR 300QFRR

Straight Plate - Terminal Block Straight Plate - Lead Wire No Plate - Terminal Block No Plate - Lead Wire

QNZ1-300QR Bent Plate Outline and Mounting Dimensions

QNZ1-300QR Straight Plate Outline and Mounting Dimensions

QNZ1-300QR No Plate Outline and Mounting Dimensions

QNZ1-300QRR Bent Plate Outline and Mounting Dimensions

QNZ1-300QRR Straight Plate Outline and Mounting Dimensions

QNZ1-300QRR No Plate Outline and Mounting Dimensions

QNZ1-300QFR Bent Plate Outline and Mounting Dimensions

QNZ1-300QFR Straight Plate Outline and Mounting Dimensions

QNZ1-300QFR No Plate Outline and Mounting Dimensions

QNZ1-300QFRR Bent Plate Outline and Mounting Dimensions

QNZ1-300QFRR Straight Plate Outline and Mounting Dimensions

QNZ1-300QFRR No Plate Outline and Mounting Dimensions

7. Wiring Diagram (Positive and Negative Poles Must NOT Be Reversed)

QNZ1-QR QNZ1-QRR

8. Ordering Information

When placing an order, please specify: ■ Contactor model and name; ■ Coil voltage; ■ Order quantity; ■ Special requirements;

Figures	Coding
1	Enterprise Code. QN represents Nanjing Quanning Electric Co., Ltd.
2	Z: DC Contactor
3	1: Product series
4	Basic Specification Code, the rated current Ie
5	Q indicates micro-power consumption type.
6	Model Code. Default: None, indicates standard model. X indicates X-type model.
7	Contact Configuration. Default: None, indicates one normally open main contact. B indicates one normally closed main contact.
8	Auxiliary Contacts. Default: None. Can be added: F11 (one NO, one NC), F20 (two NO), F02 (two NC).
9	Coil Voltage Us
10	Product Code. Default: R. RR indicates with built-in buffer resistor.

Examples:QNZ1-200QRR DC24V Bent Plate Lead Wire 100 units; Meaning: 100 units of DC contactor with built-in buffer resistor and micro-power consumption, current 200A, with resistor, with bent mounting plate, with lead wires, coil voltage DC24V. QNZ1-400QR DC48V Straight Plate Terminal Block 100 units; Meaning: 100 units of DC contactor with micro-power consumption, without resistor, with straight mounting plate, with terminal blocks, current 400A, coil voltage DC48V. QNZ1-600QXR DC48V No Plate Terminal Block 100 units; Meaning: 100 units of DC contactor with micro-power consumption, X-type, without resistor, without mounting plate, with terminal blocks, current 600A, coil voltage DC48V.

9. Usage Precautions

WARNING: ◆ The product coil is polarized. If connected in reverse, the contactor will not operate. The main circuit with magnetic blowout is polarized (L1 is positive, L2 is negative); without magnetic blowout, it is non-polarized. The positive and negative poles must NOT be reversed, as reversal can affect the load-breaking lifespan. ◆ The energy-saving coil has a relatively large starting current at initial operation, lasting between 100–120ms depending on the product's characteristics. Therefore, the driving power for the contactor must be greater than the coil power, and the operating frequency must not exceed the rated value. Otherwise, it may affect the normal starting of the DC contactor or even burn out the energy-saving module, rendering the contactor inoperative. ◆ The product has a built-in coil energy-saving module; no additional PWM or other energy-saving modules are required. If PWM pulse signals are still used to control the coil, the PWM output voltage must be set to 100%, otherwise it may affect the reliable operation of our contactors. Step-type power supply mode is recommended. ◆ When using more than one connection wire at a power terminal, ensure the main power wire is closest to the contactor's main circuit connection point, followed by smaller current wires on top, then the washer, spring washer, and nut. Incorrect connection order or loose connections can cause severe overheating and melt the cable insulation.

◆ The tightening torque for screws and bolts used with the contactor should be controlled within the specified ranges below .

M3 Screw: 0.5～0.8 N.m	M3.5 Screw: 0.8～1.2 N.m	M4 Screw: 1.2～1.8 N.m
M5 Screw: 2.0～3.0 N.m	M6 Bolt: 3.0～4.5 N.m	M8 Bolt: 6.0～9.0 N.m
M10 Bolt: 10.0～15.0 N.m	M12 Bolt: 14.0～21.0 N.m

◆ Main contact wire or busbar cross-sectional area .

50 Amps: 10mm²	100 Amps: 35mm²	160 Amps: 70mm²
200 Amps: 95mm²	300 Amps: 185mm²	400 Amps: 240mm²
500 Amps: 300mm²	600 Amps: 400mm²	800 Amps: 500mm²
1000 Amps: 600mm²	1200 Amps: 800mm²