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DT2 DIN Rail Surge Protection Class II, 1+1 Mode


  • Compact, yet high surge rated pluggable design, using minimum DIN rail width
  • External back-up fuse is not required up to 315 A
  • Retaining clip ensures enhanced vibration and shock resistance performance
  • Red/Green status indication and change-over contacts standard for remote monitoring


Part Number DT27511R
Nominal System Voltage (Un) 60 V
Max Continuous Operating Voltage (Uc) 305 V N-PE
75 V L-N
Nominal Discharge Current (In), IEC 20 kA 8/20 μs L-N
40 kA 8/20 μs N-PE
Max Discharge Current (Imax), IEC 50 kA 8/20 μs L-N
65 kA 8/20 μs N-PE
Voltage Protection Level (Up), L-N 800 V
Voltage Protection Level (Up), N-PE 1,500 V
Back-Up Fuse @ Isccr 250 A @ 50 kA
315 A @ 25 kA
Response Time, L-N 25 ns Max
Response Time, N-PE 100 ns Max
Protection Modes L-N
Short Circuit Current Rating (Isccr) 25 kA
50 kA
Temporary Over Voltage 120 min (Ut/mode), L-N 114 V Withstand
Temporary Over Voltage Withstand 200 ms (Ut), N-PE 1,200 V
Temporary Over Voltage Withstand 5 s (Ut), L-N 114 V
Nominal Discharge Current (In), UL 20 kA 8/20 μs
Short Circuit Current Rating (SCCR) 100 kA
Voltage Protection Rating (VPR), L-N 330 V
Voltage Protection Rating (VPR), N-PE 1,000 V
Technology Thermal Disconnect
Connection, Solid #2 Max
Connection, Stranded #4 Max
Torque (TQ) 3.32 ft lb
Humidity 5 – 95 % RH
Temperature -40 to 158 °F
Enclosure Material UL® 94V-0 Thermoplastic
Enclosure Rating IP 20
Mounting 35 mm top hat DIN rail
Remote Contact Switching Capacity 1.0 A @ 250 VAC
1.0 A @ 125 VAC
0.5 A @ 48 VDC
0.5 A @ 24 VDC
0.5 A @ 12 VDC
Remote Contacts Yes
Status Indication Mechanical flag
Depth (D) 2.72"
Height (H) 3.54"
Width (W) 1.42"
Unit Weight 0.505 lb
Certification Details UL® 1449 Edition 4 Type 1CA
Complies With EN 61643-11 Type 2
IEC® 61643-11 Class II
Replacement Module DT275M

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VDE is a registered trademark of VDE Verband Deutscher Elektrotechniker e.V. Corporation.



Wind Power Solutions
1.94 MB English


CE, ERICO DT2 Series
EN 61643-11, 278 KB English
cUR VZCA8.E325047
CSA C22.2 No. 8, CSA Electrical Notice No. 516
444 KB Français
UR VZCA2.E325047
ANSI/UL 1449
VDE 40046921 DT2
DIN EN 61643-11 (VDE 0675-6-11):2013-04; EN 61643-11:2012; IEC 61643-11:2011, 602 KB English, Deutsch

Instruction Sheets

(E)DT2 Surge Protective Devices Installations Instructions
579 KB English, Deutsch, Français, Español, Italiano