Motor Starters

PESW Motor Starter Selection Guide

The PESW magnetic starters are ideal to protect motors and ensure reliable operation year-after-year. Assembled together in a NEMA 4x enclosure with two options off the shelf: Start/Stop pushbutton and RESET or just the RESET button on the cover for quick and easy operation. PESW starters are recommended for all single and three phase applications where across-the-line starters can be applied.

Standard Features

• NEMA 4x enclosure
• High horsepower ratings in four compact sizes
• Fast acceleration and high initial torque
• Bimetallic overload relays - class 10
• Adjustable trip current
• Ambient temperature compensated for -4°F to +140°F eliminating the need for heaters
• Phase-loss sensitivity protection
• Selectable manual or automatic RESET
• Electrically isolated NO-NC auxiliary contacts
• Easy to install and setup
• UL, IEC, and CSA certified

WEG PESW Motor Starters

Video Introduction


Product Selection

Start/Stop & Reset Models

Use these if you want to control the starter with on board push buttons. This is the most common setup.

1 Phase, 120V Coil, Start/Stop & Reset
Model UL HP at 115 V Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
PESWS-9V18AX-RM28 0.33 120V 5.6 to 8.0 4
PESWS-9V18AX-RM29 0.5 7 to 10
PESWS-12V18AX-RM31 0.75 10 to 15
PESWS-18V18AX-RM32 1 11 to 17
PESWS-25V18AX-RM33 1.5 15 to 23
PESWS-25V18AX-RM34 2 22 to 32
PESWS-40V18AX-RM35 3 25 to 40 6
1 Phase, 208-240V Coil, Start/Stop & Reset
Model UL HP at 230 V Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
PESWS-9V24AX-RM26 0.5 208-240V 2.8 to 4.0 4
PESWS-9V24AX-RM27 0.75 4.0 to 6.3
PESWS-9V24AX-RM28 1 5.6 to 8.0
PESWS-9V24AX-RM30 1.5 8.0 to 12.5
PESWS-12V24AX-RM31 2 10 to 15
PESWS-18V24AX-RM32 3 11 to 17
PESWS-25V24AX-RM33 5 15 to 23
PESWS-25V24AX-RM34 22 to 32
PESWS-50V24AX-RM36 7.5 25 to 40 8
PESWS-50V24AX-RM38 32 to 50
PESWS-65V24AX-RM38 10
3 Phase, 120V Coil, Start/Stop & Reset
Model UL HP Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
200 V 230 V 460 V 575 V
PESW-9V18AX-R23 - 0.33 0.5 - 120V 0.8 to 1.2 4
PESW-9V18AX-R24 - - 1 1 1.2 to 1.8
PESW-9V18AX-R25 0.5 0.75 1.5 2 1.8 to 2.8
PESW-9V18AX-R26 1 1 2 3 2.8 to 4.0
PESW-9V18AX-R27 1.5 1.5 3 5 4.0 to 6.3
PESW-9V18AX-R28 2 2 5 - 5.6 to 8.0
PESW-9V18AX-R29 3 3 - 7.5 7 to 10
PESW-12V18AX-R30 - - 7.5 10 8.0 to 12.5
PESW-18V18AX-R32 5 5 10 15 11 to 17
PESW-25V18AX-R33 7.5 7.5 15 - 15 to 23
PESW-32V18AX-R34 10 10 20 25 22 to 32 6
PESW-40V18AX-R35 10 15 30 - 25 to 40
PESW-50V18AX-R38 15 15 30 40 32 to 50 8
PESW-65V18AX-R39 20 20 40 50 40 to 57
PESW-80V18AX-R41 - 25 50 60 57 to 70
PESW-95V18AX-R43 25 30 60 75 63 to 80 10
PESW-105V18AX-R44 30 - 75 - 75 to 97
PESW-105V18AX-R45 - 40 - - 90 to 112
3 Phase, 208-240V Coil, Start/Stop & Reset
Model UL HP at 230 V Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
PESW-9V24AX-R23 0.33 208-240V 0.8 to 1.2 4
PESW-9V24AX-R25 0.75 1.8 to 2.8
PESW-9V24AX-R26 1 2.8 to 4.0
PESW-9V24AX-R27 1.5 4.0 to 6.3
PESW-9V24AX-R28 2 5.6 to 8.0
PESW-9V24AX-R29 3 7 to 10
PESW-18V24AX-R32 5 11 to 17
PESW-25V24AX-R33 7.5 15 to 23
PESW-32V24AX-R34 10 22 to 32 6
PESW-40V24AX-R35 15 25 to 40
PESW-50V24AX-R38 32 to 50 8
PESW-65V24AX-R39 20 40 to 57
PESW-80V24AX-R41 25 57 to 70
PESW-95V24AX-R43 30 63 to 80 10
PESW-105V24AX-R45 40 90 to 112
3 Phase, 480V Coil, Start/Stop & Reset
Model UL HP at 460 V Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
PESW-9V47AX-R23 0.5 480V 0.8 to 1.2 4
PESW-9V47AX-R24 1 1.2 to 1.8
PESW-9V47AX-R25 1.5 1.8 to 2.8
PESW-9V47AX-R26 2 2.8 to 4.0
PESW-9V47AX-R27 3 4.0 to 6.3
PESW-9V47AX-R28 5 5.6 to 8.0
PESW-12V47AX-R30 7.5 8.0 to 12.5
PESW-18V47AX-R32 10 11 to 17
PESW-25V47AX-R33 15 15 to 23
PESW-32V47AX-R34 20 22 to 32 6
PESW-40V47AX-R35 30 25 to 40
PESW-50V47AX-R38 32 to 50 8
PESW-65V47AX-R39 40 40 to 57
PESW-80V47AX-R41 50 57 to 70
PESW-95V47AX-R43 60 63 to 80 10
PESW-105V47AX-R44 75 75 to 97

Stop/Reset Only Models

Use this version starter when you want to control the starter with an external signal device. Some common examples include: A pressure switch on an air compressor, a float switch with a water pump, or a remote control console with start/stop buttons.

1 Phase, 120V Coil, Reset Only
Model UL HP Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
115 V 230 V
PESWS-9V18EX-RM28 0.33 1 120V 5.6 to 8.0 4
PESWS-9V18EX-RM29 0.5 - 7 to 10
PESWS-12V18EX-RM31 0.75 2 10 to 15
PESWS-18V18EX-RM32 1 3 11 to 17
PESWS-25V18EX-RM33 1.5 5 15 to 23
PESWS-25V18EX-RM34 2 5 22 to 32
PESWS-40V18EX-RM35 3 - 25 to 40 6
1 Phase, 208-240V Coil, Reset Only
Model UL HP Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
115 V 230 V
PESWS-9V24EX-RM26 - 0.5 208-240V 2.8 to 4.0 4
PESWS-9V24EX-RM27 - 0.75 4.0 to 6.3
PESWS-9V24EX-RM28 0.33 1 5.6 to 8.0
PESWS-9V24EX-RM30 - 1.5 8.0 to 12.5
PESWS-12V24EX-RM31 0.75 2 10 to 15
PESWS-18V24EX-RM32 1 3 11 to 17
PESWS-25V24EX-RM33 1.5 5 15 to 23
PESWS-25V24EX-RM34 2 5 22 to 32
PESWS-50V24EX-RM36 - 7.5 25 to 40 8
PESWS-50V24EX-RM38 - 7.5 32 to 50
PESWS-65V24EX-RM38 - 10 32 to 50
3 Phase, 120V Coil, Reset Only
Model UL HP Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
200 V 230 V 460 V 575 V
PESW-9V18EX-R23 - 0.33 0.5 - 120V 08 to 1.2 4
PESW-9V18EX-R24 - - 1 1 1.2 to 1.8
PESW-9V18EX-R25 0.5 0.75 1.5 2 1.2 to 1.8
PESW-9V18EX-R26 1 1 2 3 2.8 to 4.0
PESW-9V18EX-R27 1.5 1.5 3 5 4.0 to 6.3
PESW-9V18EX-R28 2 2 5 - 5.6 t 8.0
PESW-9V18EX-R29 3 3 - 7.5 7.0 to 10
PESW-12V18EX-R30 - - 7.5 10 8.0 to 12.5
PESW-18V18EX-R32 5 5 10 15 11 to 17
PESW-25V18EX-R33 7.5 7.5 15 - 15 to 23
PESW-32V18EX-R34 10 10 20 25 22 to 32 6
PESW-40V18EX-R35 10 15 30 - 25 to 40
PESW-50V18EX-R38 15 15 30 40 32 to 50 8
PESW-65V18EX-R39 20 20 40 50 40 to 57
PESW-80V18EX-R41 - 25 50 60 57 to 70
PESW-95V18EX-R43 25 30 60 75 63 to 80 10
PESW-105V18EX-R44 30 - 75 - 75 to 97
PESW-105V18EX-R45 - 40 - - 90 to 112
3 Phase, 208-240V Coil, Reset Only
Model UL HP at 230V Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
200 V 230 V 460 V 575 V
PESW-9V24EX-R23 - 0.33 0.5 - 208-240V 0.8 to 1.2 4
PESW-9V24EX-R25 0.5 0.75 1.5 2 1.8 to 2.8
PESW-9V24EX-R26 1 1 2 3 2.8 to 4.0
PESW-9V24EX-R27 1.5 1.5 3 5 4.0 to 6.3
PESW-9V24EX-R28 2 2 5 - 5.6 to 8.0
PESW-9V24EX-R29 3 3 - 7.5 7.0 to 10
PESW-18V24EX-R32 5 5 10 15 11 to 17
PESW-25V24EX-R33 7.5 7.5 15 - 15 to 23
PESW-32V24EX-R34 10 10 20 25 22 to 32 6
PESW-40V24EX-R35 10 15 30 - 25 to 40
PESW-50V24EX-R38 15 15 30 40 32 to 50 8
PESW-65V24EX-R39 20 20 40 50 40 to 57
PESW-80V24EX-R41 - 25 50 60 57 to 70
PESW-95V24EX-R43 25 30 60 75 63 to 80 10
PESW-105V24EX-R45 - 40 - - 90 to 112
3 Phase, 480V Coil, Reset Only
Model UL HP at 460V Coil Voltage Overload Setting Range (A) Box Size (see below for dimensions)
200 V 230 V 460 V 575 V
PESW-9V47EX-R23 - 0.33 0.5 - 480V 0.8 to 1.2 4
PESW-9V47EX-R24 - - 1 1 1.2 to 1.8
PESW-9V47EX-R25 0.5 0.75 1.5 2 1.8 to 2.8
PESW-9V47EX-R26 1 1 2 3 2.8 to 4.0
PESW-9V47EX-R27 1.5 1.5 3 5 4.0 to 6.3
PESW-9V47EX-R28 2 2 5 - 5.6 to 8.0
PESW-12V47EX-R30 - - 7.5 40 8.0 to 12.5
PESW-18V47EX-R32 5 5 10 15 11 to 17
PESW-25V47EX-R33 7.5 7.5 15 - 15 to 23
PESW-32V47EX-R34 10 10 20 25 22 to 32 6
PESW-40V47EX-R35 10 15 30 - 25 to 40
PESW-50V47EX-R38 15 15 30 40 32 to 50 8
PESW-65V47EX-R39 20 20 40 50 40 to 57
PESW-80V47EX-R41 - 25 50 60 57 to 70
PESW-95V47EX-R43 25 30 60 75 63 to 80 10
PESW-105V47EX-R44 30 - 75 - 75 to 97

Dimensional Drawings

For wall mounting on starters size 8 and 10, four pan, dome, or rounded-shaped head screws with the following characteristics should be used.

Starter Size 8

• Screws size 1/4 (or M6 - ISO Standard)
• Dimensions: diameter thread shall be maximum 1/4" and diameter head shall be maximum 15/64".

Starter Size 10

• Screws size 12 (or M65- ISO Standard)
• Dimensions: diameter thread shall be maximum 0.236" and diameter head shall be maximum 0.394".

Size ØA B C D E Provision For Cable Gland Fitting (Standard)
Top Bottom Back
Size 8 in (mm) 0.2 (6.0) 10.8 (275) 5.6 (143) 7.1 (180) 11.0 (280) 2 x 1/2" and 3/4" 2 x 1/2" and 3/4" -
Size 10 in (mm) 0.3 (7.0) 14.0 (355) 6.6 (167) 9.9 (250) 14.2 (360) 2 x 1/2" and 3/4" 2 x 1/2" and 3/4"
1 x 1" and 1 1/4" 1 x 1" and 1 1/4"

Wiring Diagrams