LYDS5/6/7 DC ISOLATION SWITCHES

Item No.: LYDS5/6/7 DC

LYDS5/6/7 DC ISOLATION SWITCHES

Description：

• Non-polarity DC Isolator Switch

• Modular design, optional 2-10 levels

• Positive contact or reverse contact optional

• Single Hole Mounting, Panel Mounting, Distribution Board, Door Clutch or Enclosure optional

• Dynamic sealing design and world class sealing materials guarantee an IP66 protection rate.

The LYDS5/6/7 DC Isolator Switch is a versatile DC disconnect solution series designed to handle a range of current ratings and pole configurations for comprehensive DC power isolation.

🔹 Key Technical Knowledge

Product type: Series DC isolator switch (multiple current/pole variants)
Rated voltage: Compatible with typical DC power systems 600–1500V DC
Contacts: Positive break DC switch mechanism
Installation: Flexible mounting (panel/DIN rail depending on variant)
Compliance: IEC 60947-3 for DC isolation
Manufacturer role: OEM-ready DC isolator series producer

🔹 Use Cases / Industries

Solar photovoltaic DC power isolation
Energy storage system DC isolation
Battery banks and DC distribution panels
Telecom DC power racks
Industrial DC switchgear cabins

🔹 OEM & Manufacturing Advantage

As a professional DC isolator switch series manufacturer, we provide bulk supply, OEM/ODM services, customizable ratings, and technical support for international distributors and panel builders.

Technical Data

Main Parameters
Model	A	13	20	25	40	50
Rated insulation voltage Ui	V	1500	1500	1500	1500	1500
Rated thermal current Ith	A	32	40	55	55	55
Rated impulse withstand voltage Uimp	V	8000
Rated short-time withstand current(1s) Icw	A	780
Rated short-time making capacity Icm	A	1200
Maximum cable cross sections(ind.jumper)
Solid or stranded	mm²	4-16
Flexible	mm²	4-16
Flexible (+multicore cable end)	mm²	4-16
Torque
Tightening torque terminal screws M4.	Nm	1.2-1.8
Tightening torque single hole mounting nut M16	Nm	2.0-2.3
Tightening torque knob screws M3	Nm	0.5-0.7
Switching on oroff torque	Nm	0.9-1.3

General parameters

Knob positions

12 o’clock OFF,3 o’cock ON(9 o’clock OFF,12 o’dock ON)

Electrica Life

Actual

3000 Cycles

Standard

300 Cycles

Mechanical Life

Actual

10000 Cycles

Standard

10000 Cycles

Distance of contacts (per pole)

mm

8

Operation temperature

℃

-40 to +85

Store temperature

℃

-40 to +85

Pollution degree

3

Overvoltage category

Ⅱ

IP rating of shafte and mounting nut

IP66

According to IEC/EN60947-3. Utilization category DC-PV1.

Layers	Voltage/current(DC-PV1)
2/3/4/6/8/10		600Vdc	800Vdc	1000Vdc	1200Vdc	1500Vdc	Model
		32	26	13	10	5	LYDS5(6)(7)XX/13/ZY
		40	30	20	12	6	LYDS5(6)(7)XX/20/ZY
		55	45	25	15	8	LYDS5(6)(7)XX/25/ZY
		/	50	40	30	20	LYDS5(6)(7)XX/40/ZY
		/	55	50	40	30	LYDS5(6)(7)XX/50/ZY
4T/B/S		/	/	32	26	13	LYDS5(6)(7)XX/13/ZY
		/	/	40	30	20	LYDS5(6)(7)XX/20/ZY
		/	/	55	40	30	LYDS5(6)(7)XX/25/ZY
		/	/	/	/	45	LYDS5(6)(7)XX/40/ZY
		/	/	/	/	50	LYDS5(6)(7)XX/50/ZY

According to AS60947.3. Utilization category DC-PV2.

Layers	Voltage/current(DC-PV2)
2/3/4/6/8/10		600Vdc	800Vdc	1000Vdc	1200Vdc	1500Vdc	Model
		13	13	6	4	3	LYDS5(6)(7)XX/13/ZY
		20	15	8	6	4	LYDS5(6)(7)XX/20/ZY
		25	23	10	8	5	LYDS5(6)(7)XX/25/ZY
		40	30	20	15	8	LYDS5(6)(7)XX/40/ZY
		50	40	25	18	10	LYDS5(6)(7)XX/50/ZY
4T/B/S/3T/6T/9T		/	/	12	/	/	LYDS5(6)(7)XX/13/ZY
		/	/	18	/	/	LYDS5(6)(7)XX/20/ZY
		/	/	20	/	/	LYDS5(6)(7)XX/25/ZY
		/	/	40	/	/	LYDS5(6)(7)XX/40/ZY
		/	/	50	/	/	LYDS5(6)(7)XX/50/ZY

According to UL508I. Utilization category UL.

Layers	Voltage/current(UL 508i)
2/3/4/6/8/10		600VDC	800VDC	1000VDC	Model
		30	30	13	LYDS5(6)(7)XX/13/ZY
		30	30	20	LYDS5(6)(7)XX/20/ZY
		30	30	25	LYDS5(6)(7)XX/25/ZY
		30	30	30	LYDS5(6)(7)XX/30/ZY

Note* 10P products needs to be customized, please kindly contact us if need them

• Non-polarity DC Isolator Switch

• Modular design, optional 2-10 levels

• Positive contact or reverse contact optional

• Single Hole Mounting, Panel Mounting, Distribution Board, Door Clutch or Enclosure optional

• Dynamic sealing design and world class sealing materials guarantee an IP66 protection rate.

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🔹 FAQ – LYDS5/6/7 DC Isolator Switch

What does the LYDS5/6/7 series cover?
Multiple variants of DC isolator switches for different current and pole configurations.
Can this series be used in solar PV applications?
Yes — ideal for DC string isolation and PV array manual disconnection.
Is arc control handled effectively?
Yes — positive break design and DC-rated contacts minimize arcing risk.
Which standards does it follow?
Designed to meet IEC 60947-3 DC isolator switch requirements.
Is OEM customization possible?
Yes — factory supports branding, packaging, and specification customization.