Specification

Circuit Breaker and Surge
Protective Device (SPD)
The Murray circuit breaker and Surge Protective Device (SPD) is comprised of
a highly effective TVSS integrated with (2) 1-pole circuit breakers. This device
incorporates the robust features of a secondary circuit breaker surge arrester
with a lower clamping voltage ratings.
Two green LED indicator lights are provided to show that surge protection is
provided for all circuits connected to the panelboard. As a Murray exclusive
feature, the device notifies the owner of loss of surge protection by tripping
one or both of the circuit breakers.
The circuit breaker and SPD utilize Murray-built 150V AC, 40mm, metal oxide
varistors (MOVs). The maximum impulse rating for the SPD module is 40kA.
The standard interrupting rating for the circuit breakers is 10k AIC. The circuit
breakers are SWD and HACR rated.
All Type MSA circuit breakers and SPD are plug-on style, with load terminals
provided. The devices are rated for 120/240V AC and are calibrated for 40
degrees C maximum ambient applications.
Features
15 Amp
20 Amp
Catalog number
MSA1515SPD
MSA2020SPD
Amperage 15 or 20 Amp
Number of poles (2) 1-Pole circuit breakers
Initial clamping level 240 Volts
Transient energy rating 360 Joules, line-to-neutral
720 Joules, line-to-line
Transient suppression 500 Volts peak, line-to-neutral
Voltage rating 1000 Volts peak, line-to-line
Peak current rating (impulse) 40,000 amperes
Discharge voltage characteristic @ 1,500A, 600 Volts, line-to-neutral
@ 5,000A, 800 Volts, line-to-neutral
Discharge current withstand rating 10,000 amperes, line-to-neutral
Circuit breaker interrupting rating 10,000A, 120/240V AC
House wiring system warranty
amount
$20,000
Warranty period 24 months
Listings/certifications UL, CSA, Meets UL 1449 3rd edition
www.murrayconnect.com
Data Sheet