NT
Features
■
50 kA max. discharge current rating
■
Multi-pole uni-block design
■
DIN Rail mountable
■
UL 60691 compliant integrated thermal
■
Compact design ideal for limited spaces
■
Standards compliance:
■
RoHS compliant*
*R
oH
S
CO
M
PL
IA
disconnect
■
Visual fault indicator
■
Remote signalling capability
1250 Series General Duty AC Surge Protective Device
General Information
The Bourns Model 1250 Series is a general duty Surge Protective Device (SPD)
designed to protect high risk electrical service entrance and branch panels. This SPD is
intended to be installed at the front end of the installation, in the main switchboard, close
to sensitive terminals or in installations without LPS (lightning rods).
The Model 1250 Series is a single-pole module that can be configured for both common
mode and differential mode protection in single and three phase applications up to 480 V.
®
Electrical Diagram
C
Ft
1. 4
1. 1
1. 2
L/N
V
V:
Ft :
C:
t° :
High energy varistor
Thermal fuse
Remote signaling contact
Thermal disconnection system
Electrical Characteristics
Characteristic
AC Network
Connection Mode
AC System
Max. Operating Voltage (MCOV)
TOV Withstand
Leakage Current at Uc
Follow Current
UL Nominal Discharge Current (In)
15 Impulses 8/20 µs
Max. Discharge Current (I
max
)
1 Impulse 8/20 µs
Max. Lightning Current (I
imp
)
1 Impulse 10/350 µs
UL Voltage Protection Rating (VPR)
Protection Level (Up)
UL Short-Circuit Current Rating (SCCR)
General Characteristics
Characteristic
Thermal Disconnector
Overcurrent Protection
Connection
Dimensions
Mounting
Remote Signal Indicator
Enclosure Material
Environmental Characteristics
Characteristic
Operating Temperature
Operating Altitude
Relative Humidity
Environmental Rating
Model No.
1250-xS-120
1250-xS-230
1250-xS-400
1250-xS-480
Model No.
1250-xS-120
1250-xS-230
1250-xS-400
1250-xS-480
120/240 V,
120/208 V
150 V
150 V
220/380 V,
220/380 V,
277/480 V,
240/415 V
347/600 V
1-Pole, L-N or L-G
IT, TT, TN, Single, Split Phase, Delta, Wye
275 V
400 V
275 V
400 V
< 1 mA
None
20 kA
50 kA
--
347/600 V,
480 V
550 V
550 V
700 V
0.9 kV
1000 V
1.25 kV
100kAIC
1200 V
1.8 kV
1800 V
2.5 kV
Model No.
1250-xS-120
1250-xS-230
1250-xS-400
1250-xS-480
UL 60691
Time Delay - 125 A Max.
By Screw Terminals, #6 AWG Max.
90 x 18 x 67 mm / (3.543 x 0.709 x 2.638 In.)
DIN Rail, 35 mm Symmetrical
250 Vac Max., 2 A
Thermoplastic UL 94V0
-50 °C to +85 °C
13,000 ft. (4,000 m)
5 to 95 % Non-condensing, up to 100 % External
IP 20
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
