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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: NQQK
  • Model Number: NKDH2548ZD3
  • Theory: Solid State Relay
  • Usage: Protective
  • Size: Miniature
  • Protect Feature: Sealed
  • Contact Load: High Power
  • Name: DC control solid state relay
  • Color: Black
  • Electricity Type: AC
  • Number of Pole: 1
  • Load Current: 25A
  • HS Code: 8536490000
  • Control voltage: 3-32VDC
  • Load voltage: 24~480VAC
  • Input current: 12mA
  • Certifications: CE

Packaging & Delivery

Packaging Details carton
Delivery Time 3days

AC control dc 25A Single Phase zero cross or

random Solid State Relay with LED indicator

Product Description



Solid state relay (SSR) is an electronic switching device that switches states when an external voltage is applied along its n-type and p-type junctions. SSR has a small control signal that controls a larger load current or voltage. It consists of a sensor which responds to an appropriate input (control signal), a solid-state electronic switching device which switches power to the load circuitry, and some coupling mechanism to enable the control signal to activate this switch without mechanical parts. The relay may be designed to switch either AC or DC to the load. It serves the same function as an electromechanical relay, but has no moving parts.


  • Dielectric strength 4000V
  • Photo isolation
  • Zero cross or random turn-on
  • Removable finger proof cover available
  • Double SCR AC output
  • Panel mount
  • DC or AC control
  • Built-in RC


Models explanation:

    1         2        3        4

1.NK – Code
NKDH – single-phase solid state relay (10 – 120A)
NKDM – industrial class solid state relay (100 – 500A)
NKTH – three-phase solid state relay (10 – 120A)
NKTR – motor reversing solid state relay (10 – 40A)
2.40 – load current 40A (10 – 500A)
3.48 – load voltage 24-480V AC, 38 – 24-380V AC, 23 – 5-220V DC
4.ZD3 – control signal type(swithing mode)
VA – variable resistor 220-560 /2 (phase control)
LA – analog signal 4-20mA (phase control)
VD – analog signal 0-10V DC (phase control)
ZD – control voltage 10-30V DC (switching at zero crossing)
ZD3 – control voltage 3-32V DC (switching at zero crossing)
ZA2 – control voltagte 70-280V AC (switching at zero crossing)
DD3 – control voltage 3-32V DC (DC voltage switching)


Loda voltage Control Signal Rated current
480V AC 3-32 VDCNKDH1048ZD3NKDH2548ZD3NKDH4048ZD3
70-280V ACNKDH1048ZA2NKDH2548ZA2NKDH4048ZA2


Loda voltage Control Signal Rated current
480V AC 3-32 VDCNKDH6048ZD3NKDH8048ZD3NKDH100ZD3NKDH12048ZD3
70-280V ACNKDH6048ZA2NKDH8048ZA2NKDH10048A2NKDH12048ZA2

Technical specifications:

Load voltage24-480VAC
Control voltage3-32V DC70-280V AC
Current consumption in control circuit3-25mA≤12mA
Voltage ON/OFF3V DC / 1V DC70V DC / 10V DC
Peak voltage 1000V AC 
Voltage drop in load circuuit≤1.6V AC
Leakage current(off-state)≤10mA
Switching time≤10mS
LED indicationyes
Dielectric strength2500V AC (1min)
Insulation resistance500MΩ with 500V DC
Operating temperature-30°c ~ +75°c
Relative Humidity≤95%(non-condensing)
Mounting methodScrews on


AC/AC 40A  480VAC 24VAC Single Phase SSR solid state relay AC/AC 40A  480VAC 24VAC Single Phase SSR solid state relay AC/AC 40A  480VAC/AC ac to ac 25A Single Phase SSR Solid State Relay with LED indicatorAC/AC ac to ac 25A Single Phase SSR Solid State Relay with LED indicatorAC/AC ac to ac 25A Single Phase SSR Solid State Relay with LED indicatorAC/AC ac to ac 25A Single Phase SSR Solid State Relay with LED indicatorAC/AC ac to ac 25A Single Phase SSR Solid State Relay with LED indicatorAC/AC ac to ac 25A Single Phase SSR Solid State Relay with LED indicatorAC Single Phase SSR solid state relay


Q:How to order our product ? 

A:1).Please tell us the model and quantity and other request you need. 

   2).We make the PI for you.

   3).After you confirm the PI, we arrange the order for you after receiving your payment.

   4).After the goods finished, we send the goods out to you and tell you the tracking number.

   5).We will track your goods until you receive the goods. 

Q:  What's your warranty ?

A: 1-2 years

Q: What's your contact information:

A: Our address: Liushi town, Zhejiang province, China. 

Q: What's your shipment method?

A: We ship by Express, by air, by sea, by train. Normally we checked and compare, then provide

customer the most proper shipment method.

Q: What's about MOQ?

A: First order MOQ=1pcs

Q: If i want to release order, what's the payment method you accept ?

A: We accept T/T, Paypal, Western union, L/C,etc.

Q: If i want to release order, what's the process?

A: Thanks. You can send inquiry to us by alibaba, or send us by email, we will reply within 24hrs.

Our Services

1. Your inquiry will be replied within 18 hours.
2. We offer you professional service in fluent English.
3. Keep the mass production as the sample in high quality.
4. Freight forwarder: faster,safer, and convenient.
5. Quality: we have QC on each process.

Packaging & Shipping


Company Information



Contact us

ADD:Xingguang Industrial Zone, liushi, Yueqing City, Zhejiang, China

Tel: +86 577 61787391      Fax:+86 577 61787392

Whatsapp:008613968785810  Skype: NQQK ELC

Http://www.nqqkelc.com      E-mail:sales at nqqkelc.com


Thank you & Now send your kindly inquiry below, please!  


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China (Mainland) | Manufacturer, Trading Company
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The supplier’s transactions conduted via Alibaba.com in the past 6 months.
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Supplier's Trade Assurance Limit: US $23,000
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