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Product Detail

QNZ1-400QV Micro-power DC Contactor (Aux. Contacts Opt.)

Rated Load Voltage (VDC): 120 Rated Load Current (A): 400 Rated Insulation Voltage (VDC): 1500 Coil Control Voltage (V): DC12/24/48/60/72/80/96/110/144/220/AC380 Coil Operating Power Consumption (W): ≤0.5 Coil Function: Can be delayed to break / pull-in upon demand Protection Rating: IP67 Electrical Life (Operations): 1 × 10⁴ Mechanical Life (Operations): 150 × 10⁴ Mounting Method: With bracket / Without bracket Auxiliary Contacts: Optional (11)

Product Description

1.Application

The QNZ1-Q series low-power sealed DC contactor is suitable for circuits with an operating voltage of 200V or below under DC-1 load. It is primarily used for switching control of the main battery circuit and engine starting in electric vehicles and construction machinery. It can also be used as a bypass isolation switch in frequency converters, soft starters, high-frequency heating power supplies, or other similar DC-20 loads. The product complies with the following standards: IEC/EN 60947-4-1, GB/T 14048.4. The product has obtained the following certifications: CCC, CE, TUV, UL, RoHS.

2.Coding

Figures	Coding
1	Enterprise Code: QN represents Nanjing Quanning Electric Appliance Co., Ltd.
2	Z: DC Contactor
3	1： Design Sequence Number
4	Basic Specification Code: Numeric value representing the rated current (Ie)
5	Product series code: "Q" denotes a low-power, sealed structure.
6	Model code: default is blank, indicating the standard model; also available are model X and model V.
7	Default is blank, indicating one normally open main contact; "B" indicates one normally closed main contact.
8	Default is blank; optional accessories include L-type mounting bracket, C-type mounting bracket, Z-type mounting bracket.
9	Default is blank; optional accessories include two sets of auxiliary contacts: F11 (one normally open and one normally closed), F20 (two normally open), F02 (two normally closed).
10	Coil Voltage Us

3.Key Points

▲ Coil utilizing ultra-low power consumption technology, offering high energy efficiency and anti-surge protection; the coil itself does not generate heat. ▲ Excellent resistance to shock and vibration; high contact pressure with silver alloy contacts ensures reliable contact, low temperature rise, and strong overload performance. ▲ Rare-earth strong magnetic arc extinguishing, long electrical lifespan, high resistance to welding, safe and reliable. ▲ High insulation performance, withstands 3500V power frequency voltage. ▲ Compliant with EU RoHS environmental directives and national energy-saving and environmental protection requirements. ▲ Standard models and X-type models feature fixed screw terminals; V-type models are equipped with flexible lead wires.

4. Operating and Installation Conditions

▲ Ambient Temperature: -40°C to +85°C ▲ Ambient Humidity: Maximum relative humidity 85% ▲ Altitude Derating: For installation altitudes above 2000 meters, derate by 5% for every 1000 meters of increased altitude, up to a maximum of 5000 meters. ▲ Sinusoidal Sweep Vibration at Fixed Point: 10–500Hz(10Hz–50Hz: amplitude 2.5mm; 50Hz–200Hz: amplitude 0.16mm; 200Hz–500Hz: acceleration 50 m/s²) ▲ Pollution Degree: Degree 3 ▲ Mounting Orientation: Horizontal or vertical ▲ Mounting Method: Screw mounting ▲ Applicable Duty Cycles: Continuous duty, intermittent periodic duty.

5.Technical Parameters

Specifications Parameters		QNZ1-400QV
Contact Configuration		1P (NO or NC); 1P (NO or NC) + F11, F20, F02 QV Models: 1P (NO or NC); 1P (NO or NC) + F11
Rated Insulation Voltage Ui(V)		1500
Bypass Working Voltage Un（VDC）		1500
Rated Operational Voltage Ue（VDC）		160
Rated Operational Current Ie（A）DC-1		400
Contact Voltage Drop Ud（mV）		≤95
Pole Impedance Z（mΩ）		≤0.4
Minimum Load for Make		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/VAC)	DC12V、24、48、60、72、80、96、110、144、220、AC380V
	Pick-up Voltage (VDC/VAC)	0.85Us～1.10Us
	Drop-out Voltage (VDC/VAC)	0.10Us～0.75Us
	Pick-up Current (A)	0.5～3, see appendix for details
	Holding Current (A)	0.0013～0.0417, see appendix for details
	Pick-up Power (W)	18～190, see appendix for details
	Holding Power (W)	0.5, see appendix for details
	Compatible Power Supply	Switching power supply; PWM modulated power supply with 100% duty cycle; Rectified and filtered power supply with a ripple factor of less than 5%
	Optional Power Supply (Custom)	DC square wave power supply; Rectified and filtered power supply with ripple factor >5%
Electrical Life	DC-1, Ue, Ie (x10⁴ operations)	1
Electrical Life	DC-1, Other Parameters	Refer to Load Switching Life Curve
Operating Frequency (operations/hour)		300 (1 operation/12 seconds, interval between on and off not less than 0.5s)
Mechanical Life (x10⁴ operations)		150
Overload Performance (A)		1.5Ie/30min; 3Ie/1min; 5Ie/10s; 8Ie/1s; other data refer to Overload Curve
Operating Times	Pick-up Time (ms)	≤300
Operating Times	Release Time (ms)	≤50
Main Contact Wire/Busbar Cross-section (mm²)		240
Main Contact Terminal Tightening Torque (N.m)		M8 Bolt: 6.0～9.0
Insulation Resistance (MΩ)		≥300 (at 500VDC)
Dielectric Strength	Between coil and contacts	3500V AC, 1 Min, No breakdown or flashover, leakage current ≤5mA
Dielectric Strength	Between open contacts	3500V AC, 1 Min, No breakdown or flashover, leakage current ≤5mA
Temperature Rise	Coil (at Us)	≤15K
	Terminals (at Ie)	≤65K
	Enclosure	＜60K
Magnet Wire	Temperature Resistance	≤180℃
	Insulation Class	H级
	Withstand Voltage (Wire to ground)	1000V AC/1Min, No breakdown or flashover, leakage current ≤5mA
Weight (kg)		Approx. 0.5

Appendix: Coil Parameters

Coil Voltage (VAC/VDC)	Pick-up Current (A)	Holding Current (A)	Pick-up Power (W)	Holding Power (W)
DC12V	≤3	≤0.0417	≤36	≤0.5
24	≤1.5	≤0.0208	≤36	≤0.5
48	≤1	≤0.0104	≤48	≤0.5
60	≤1	≤0.0083	≤60	≤0.5
72	≤1	≤0.0069	≤72	≤0.5
80	≤1	≤0.0063	≤80	≤0.5
96	≤1	≤0.0052	≤96	≤0.5
110	≤0.8	≤0.0045	≤88	≤0.5
144	≤0.6	≤0.0035	≤86.4	≤0.5
220	≤0.5	≤0.0022	≤110	≤0.5
AC380V	≤0.5	≤0.0013	≤190	≤0.5

QNZ1-Q Overload Current vs. Time Curves:

6. Outline and Installation Dimensions (Dimensions are the same for NO and NC models)

400QV 400QV+L 400QV+F 400QV+L+F

400QVB 400QVB+L 400QVB+F 400QVB+L+F

QNZ1-400QV Outline and Installation Dimensions

QNZ1-400QV+L Outline and Installation Dimensions

QNZ1-400QV+F Outline and Installation Dimensions

QNZ1-400QV+L+F Outline and Installation Dimensions

7. Connection Diagrams (Polarity must not be reversed)

QNZ1-Q QNZ1-Q+F11

QNZ1-Q+F20 QNZ1-Q+F02

QNZ1-QB QNZ1-QB+F11

QNZ1-QB+F20 QNZ1-QB+F02

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 Appliance Co., Ltd.
2	Z: DC Contactor
3	1： Design Sequence Number
4	Basic Specification Code: Numeric value representing the rated current (Ie)
5	Product series code: "Q" denotes a low-power, sealed structure.
6	Model code: default is blank, indicating the standard model; also available are model X and model V.
7	Default is blank, indicating one normally open main contact; "B" indicates one normally closed main contact.
8	Default is blank; optional accessories include L-type mounting bracket, C-type mounting bracket, Z-type mounting bracket.
9	Default is blank; optional accessories include two sets of auxiliary contacts: F11 (one normally open and one normally closed), F20 (two normally open), F02 (two normally closed).
10	Coil Voltage Us

Examples:

QNZ1-200Q+L DC24V 100 units; 100 units low-power DC contactor, one normally open main contact, 200A current, with L-type mounting bracket, coil voltage DC24V. QNZ1-200QB DC48V 100 units; 100 units low-power DC contactor, one normally closed main contact, 200A current, coil voltage DC48V. QNZ1-200Q AC220V 100 units; 100 units low-power DC contactor, one normally open main contact, 200A current, coil voltage AC220V.

9. Precautions for Use

◆ The product coil is polarized (A1 is positive, A2 is negative). The main circuit with magnetic blowout is polarized (L1 is positive, L2 is negative), while the main circuit without magnetic blowout is non-polarized. The polarity must not be reversed, as doing so will affect the load-breaking service life. ◆ The energy-saving coil has a relatively large inrush current at initial operation, lasting between 100-120ms depending on product characteristics. Therefore, the driving power of the contactor must be greater than the product 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 a PWM pulse signal output is still used to control the contactor coil, the PWM output voltage must be adjusted to 100%; otherwise, it may affect the reliable operation of our contactors. A step-change power supply mode is recommended. ◆ When more than one connection wire is used at the power terminal, ensure that the main power conductor is placed closest to the contactor's main circuit connection point, with the lower-current connection wires placed on top, followed by the washer, spring washer, and nut. Incorrect connection order or loose connections may cause severe overheating and lead to melting of the connected cable's insulation.

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

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 (see table).

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	2000 Amps: 1500mm²
3500 Amps: 3500mm²	5050 Amps: 5050mm²

◆ Mounting Bracket (2mm) Screw Specifications: Recommended for all QNZ1-50Q/100Q/160Q/200QX models: GB/T 846-ST2.9x8 Cross Recessed Countersunk Head Tapping Screw. Recommended for all QNZ1-200Q/300Q/400QX and QNZ1-200QV/300QV/400QV models: GB/T 822-M5x16 Cross Recessed Pan Head Screw, along with GB/T 97.1-Φ5 Plain Washer, GB/T 93-Φ5 Spring Washer, GB/T 6170-M5 Hex Nut. Recommended for all QNZ1-400Q/500Q/600QX, QNZ1-600Q, and QNZ1-800Q/1000Q/1200Q models: GB/T 822-M6x20 Cross Recessed Pan Head Screw, along with GB/T 97.1-Φ6 Plain Washer, GB/T 93-Φ6 Spring Washer, GB/T 6170-M6 Hex Nut. ◆ Prohibit forcibly bending the wire or busbar after installing and tightening the screws, to prevent damage to the contactor and ensure its normal operation!

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