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4
IO-75065
12/2019
ASCO Model 277
Surge Protective Device (SPD) with Active Tracking Filter™
Table 1: ASCO Model 277 Voltage Ratings
Service Voltage
MCOV
Continuous
Current
Normal
Discharge
Current
Fusing Circuit
Breaker Size
Certification
Catalog Numbers
120 V, 50/60 Hz, 1-phase
2 wire + ground
150 V
(L–N)
3 A
3 kA
25 A Class CC
Fuse
UL1449 /
UL1283 CSA
C22.2 No.
269.5-17
277120NF003AN3N0
5 A
277120NF005AN3N0
10 A
277120NF010AN3N0
20 A
277120NF020AN3N0
240 V, 50/60 Hz, 1-phase
2 wire + ground
320 V
(L–N)
3 A
277240LF003AN3N0
5 A
277240LF005AN3N0
10 A
277240LF010AN3N0
20 A
277240LF020AN3N0
Table 2: ASCO Model 277 General Specifications
1
Mounting
Power
Connection
Wiring (Copper
Wire)
Terminal
Torque
Operating / Storage Temperature
Catalog Numbers
DIN rail or
surface mount
Line /
Neutral /
Ground
18–12 AWG
4 lb-in.
(0.45 N•m)
+32 °F to +77 °F (0°C to +25 °C)
277120NF003AN3N0
277120NF005AN3N0
277120NF010AN3N0
277120NF020AN3N0
14–10 AWG
7 lb-in.
(0.45 N•m)
277240LF003AN3N0
277240LF005AN3N0
12–10 AWG
277240LF010AN3N0
277240LF020AN3N0
1
Contains no serviceable parts.
