Technical data
March 2009
CA08102001E For more information visit: www.eaton.com
33-55
NEMA Contactors & Starters
33
IT. Manual and Combination Motor Controllers
IT. Manual and Combination Motor Controllers – NEMA Contactors
When Ordering Specify —
■ All Non-reversing and Reversing
motor controllers are selected based
on the overload current range
required for a given motor. This
current range is determined from
the motor Full Load Ampere rating
and Motor Service Factor usually
found on the motor nameplate.
■ For motors with service factors less
than 1.15, multiply the motor FLA by
.92 to select the appropriate motor
controller. Example: For a motor
having FLA of 6.4A and a service
factor of 1.0 (6.4A x .92 = 5.88A)
select Catalog Number
MN357TNSAX3N.
■ For motors with service factor of
1.15 or greater, use motor name-
plate Full Load Amperes to select
the appropriate motor controller.
Example: For a motor having FLA
of 6.4A and a service factor of 1.15,
select Catalog Number
MN357UNSAX3N.
Instructional Leaflets
See Page 33-52 for Listing.
Table 33-75. IT. Open Reversing Manual Motor Controllers (A307 Manual Motor Protector + N511B Size 00 IT. NEMA Reversing Contactor) —
For Group Motor Applications
Select motor controller by motor Full Load Amperes. Horsepower ratings are for reference only.
Mounting plate included.
Notes —
■ For more information on the use of Line Side Adapters, see Table 33-87, Page 33-63.
■ For information on Manual Motor Protectors and Wiring Connector Links refer to Pages 34-294 – 34-299. For IT. NEMA
Contactors, refer to Pages 33-29 and 33-30.
■ The Catalog Number is a composite of the factory assembled Manual Motor Protector, the IT. Contactor and the mounting
plate. E.g. Catalog No. MN357DNSAX3N is the combination of A307DN and N511BSAX3N.
MN357 — IT. Open Reversing
Manual Motor Controller with
NEMA Size 00 FVR Contactor
FLA
Adjustment
Range
Single-Phase
hp Ratings
Three-Phase
hp Ratings
Manual
Motor
Protector
IT. NEMA Reversing
Contactor
Catalog
Number
Price
U.S. $
115V 230V 200V 230V 460V 575V 24V DC
Coil
0.22 – 0.32
0.28 – 0.40
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—
—
—
—
—
—
—
—
—
—
—
A307DN
A307EN
N511BSAX3N
N511BSAX3N
MN357DNSAX3N
MN357ENSAX3N
0.35 – 0.50
0.45 – 0.63
0.55 – 0.80
0.7 – 1.0
0.9 – 1.25
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—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1/4
—
—
1/4
1/2
3/4
—
1/4
1/2
1/2
3/4
A307FN
A307GN
A307HN
A307JN
A307KN
N511BSAX3N
N511BSAX3N
N511BSAX3N
N511BSAX3N
N511BSAX3N
MN357FNSAX3N
MN357GNSAX3N
MN357HNSAX3N
MN357JNSAX3N
MN357KNSAX3N
1.1 – 1.6
1.4 – 2.0
1.8 – 2.5
2.2 – 3.2
2.8 – 4.0
—
—
—
1/10
1/8
1/10
1/8
1/6
1/4
1/3
1/4
1/3
1/2
3/4
3/4
1/3
1/2
1/2
3/4
1
3/4
1
1-1/2
1-1/2
2
1
1-1/2
1-1/2
2
3
A307LN
A307MN
A307NN
A307PN
A307RN
N511BSAX3N
N511BSAX3N
N511BSAX3N
N511BSAX3N
N511BSAX3N
MN357LNSAX3N
MN357MNSAX3N
MN357NNSAX3N
MN357PNSAX3N
MN357RNSAX3N
3.5 – 5.0
4.5 – 6.3
5.5 – 8.0
1/6
1/4
1/3
1/2
3/4
1
1
1-1/2
2
1
1-1/2
2
3
5
5
3
5
5
A307SN
A307TN
A307UN
N511BSAX3N
N511BSAX3N
N511BSAX3N
MN357SNSAX3N
MN357TNSAX3N
MN357UNSAX3N
Accessories . . . . . . . . . . . . . . . . . . . . . Page 33-63
Dimensions. . . . . . . . . . . . . . . . . . . . . . Page 33-67
Discount Symbol . . . . . . . . . . . . . . . . . 1CD1