Cut Sheet

Captive stainless steel
screws in cover won’t
fall out when cover
is open
High impact,
non-conductive
Valox
®
PBT Resin cover,
housing and handle
Interlocking handle
prevents cover removal
when in "ON" position
Circuit identification
pad for means of
identifying specific
equipment loads
Enclosure rated to Type
3R, 4X, 12K and IP67
watertight and dust-tight
standards
7 Conduit entry points, identified with
drill marks, for maximum wiring flexibility
- 2 Top
- 2 Bottom
- 2 Side
- 1 Back
2 YEAR LIMITED
Engineered
to IP67 Standards
Dimensions
Electrical Specifications
Dielectric Voltage-Withstand 2200V AC for 1 minute
Overload
50 cycles at 6 times full
rated current
Temperature Rise
50°C maximum at full
rated current
Endurance
6000 cycles of inductive motor
type load. Dual rated General
Purpose and Manual Motor Control
Short Circuit Rating
(Motor Disconnect)
10,000 RMS symmetrical amps at
600V AC max. When protected by a
30 A time delay fuse
Material Specifications
Enclosure PBT Polyester
Handle PBT Polyester
External Hardware Stainless Steel
Environmental Specifications
Flammability UL94 V-0
Operating Temperature -40ºC to 60ºC
Rain (3R) per UL 50
Water spray @ 5 psi from all
sides for 1 hr
Hosedown (4X) per UL 50 Water spray @ 65 gal/min for 5 min.
Dust (12K) per UL 50
Cement Dust Circulated @1000 ft/
minute for 5 minutes
Gasket Aging 70°C for 168 hours
UV Resistance
Exposed plastic materials are
UV stabilized
Specifications
Mechanical Specifications
Mold Stress Relief 70°C for 7 hours
Knockout Test Remains in place with 20 lb push
Crush 100 lb
Impact 1.2 lb steel ball dropped from 5 ft
Cold Impact
Same as above, after conditioning
to -35°C
Strength of Insulating Base
and Support
110% of specified tightening
torque on terminal screws
Terminal Identification
T1, T2, T3, L1, L2 & L3 marked on
back of device
Terminal Accommodation
#10 AWG, #8 AWG (with ring
terminal)
Torque 20 inch-pounds
Standards Specifications
NEMA WD1 & WD6
ANSI C-73
UL 508 File #E63969
cUL per CSA C22.2 No. 111 File #E63969
NOM 057
Features
Ground terminal block
Metal ground frame
Factory-installed
cover gasket
Neutral terminal block
UL 508 Manual
Motor Starter
Switch Mechanism
Back conduit entry
Rugged hinge
mechanism pivots
180° for easy
access during
installation and
maintenance
4 Mounting feet included
(5 position settings)
Ordering Information
Cat. No. Description Amp. Poles Volt. HP
MS4X-302
30 Amp, 600VAC, 2-Pole Motor Starter in Type 4X Thermoplastic Enclosure
30A
2
120V
240V
480V
600V
2
5
10
15
MS4X-402
40 Amp, 600VAC, 2-Pole Motor Starter in Type 4X Thermoplastic Enclosure
40A
MS4X-303
30 Amp, 600VAC, 3-Pole Motor Starter in Type 4X Thermoplastic Enclosure
30A
3
120V
240V
480V
600V
3
7.5
15
20
MS4X-403
40 Amp, 600VAC, 3-Pole Motor Starter in Type 4X Thermoplastic Enclosure
40A
Handle with padlock installed
(padlock not included)
Valox is a registered trademark of Sabic Innovative Plastics