12V 24V 48V DC Surge Protective Device SPD Type 2 T2 Class C Class II SLP20-DC series

For Photovoltaic PV solar and DC applications Type 2 T2 Class C, In/Imax (8/20μs): 10kA/20kA, with changeover contact.

  • Plug-in module design, easy replacement.
  • Visual Indication: Green=OK, Red=Replace.
  • Remote alarm contact to make status monitoring easy.
  • Quick thermal response for self-protection.
  • Voltage protection level (Up): 0.25kV/0.3kV.
  • Type 2, T2, Class C, Class II, In(8/20μs): 10kA, Imax(8/20μs): 20kA.
  • Undc: 12Vdc/24Vdc/48Vdc.
  • Ucdc: 24Vdc/38Vdc/65Vdc.

DC Surge Protective Device SPD Type 2 T2 Class C SLP20 series is suitable for photovoltaic applications. These SPDs are designed and tested according to DC Type 2 classification from IEC 61643-11 / EN 61643-11 / EN 50539-11 standard.

The indication front window helps users to know the status of the device and the remote-signal port is able to provide remote indication and alarm.
Plug-in module design makes it convenient to change modules without device disconnection.

IEC Electrical
Rated Operational DC Voltage Uo / Un12 V24 V48 V
Maximum Continuous Operating DC Voltage

(DC+) – PE, (DC-) – PE Uc

24 V

38 V

65 V

Nominal Discharge Current (8/20 μs) In10 kA10 kA15 kA
Total Discharge Current (810/20 μs) ITotal20 kA
Max. System Voltage Uoc24 V38 V65 V
Maximum Discharge Current (8/20 μs) IMaxl20 kA
Voltage Protection Level Up250 V250 V300 V
Response Time tA< 25 ns
Number of Ports1
Mechanical & Environmental
Operating Temperature Range Ta-40 ºF to +158 ºF [-40 ºC to +70 ºC]
Permissible Operating Humidity RH5%…95%
Atmospheric pressure and altitude80k Pa … 106k Pa / -500 m … 2000 m
Terminal Screw Torque Mmax39.9 Ibf·in [4.5 Nm]
Conductor Cross Section (max)

2 AWG (Solid, Stranded) / 4 AWG (Flexible)

35 mm2 (Solid, Stranded) / 25 mm2 (Flexible)

Mounting35 mm DIN Rail, EN 60715
Degree Of ProtectionIP 20 (built-in)
Housing MaterialThermoplastic: Extinguishing Degree UL 94 V-0
Thermal ProtectionYes
Operating State / Fault IndicationGreen ok / Red defect
Remote Contacts (RC)Optional
RC Switching CapacityAC: 250V / 0.5 A; DC: 250V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A
RC Conductor Cross Section (max)16 AWG (Solid) / 1.5 mm2 (Solid)
Order Information
Order Code243865
SLP20 -DCXXX/2200242120038212006521
SLP20 -DCXXX/2S (with remote contacts)200242220038222006522
SLP20 -DCXXX/0 (spare modules)200240220038022006502


Q1: Selection of surge protector

Al: The grading of the surge protector (commonly known as lightning protection) Is assessed according to the IEC 61643-11 / EN 61643-11 / EN 50539 subdivision lightning protection theory, which is installed at the junction of the partition. Technical requirements and functions differ. The first-stage lightning protection device is installed between the 0-1 zone, high for the flow requirement, the minimum requirement of IEC 61643-11 / EN 61643-11 / EN 50539 is 20 ka (8/20), and the second and third levels are installed between the 1-2 and 2-3 zones, mainly to suppress the overvoltage.

Q2: Are you a lightning surge protectors factory or lightning surge protectors trading company?

A2: We are a lightning surge protectors manufacturer.

Q3: Warranty and services:

A3:1. Warranty 5 years

2. lightning surge protectors products and accessories have been tested 3 times before ship out.

3. We own the best after-sale service team, if any problem happens, our team will do our best to solve it for you.

Q4: How can I get some lightning surge protectors samples?

A4: We are honored to offer you lightning surge protectors samples, pis contact our staff, and leave detailed contact information, we promise to keep your information confidential.

Q5: Is the sample available and free?

AS: Sample is available, but the sample cost should be payable by you. The cost of the sample will be refunded after further order.

Q6: Do you accept customized order?

A6: Yes, we do.

Q7: What’s the delivery time?

A7: It usually takes 7-15days after confirming payment, but a specific time should be based on the order quantity.

Packaging & Shipping

Packaging & Shipping

We promise to reply within 24 hours and ensure that your mailbox will not be used for any other purpose.