32

1/2 (4.0)

3/4 (3.2)

3/4

(3.1)

1

(3.6)

2

(3.42)

3/4 (5.6)

(5.7)

(5.2)

3

(4.8)

1

(7.2)

2

(7.8)

2

(7.5)

3

(9.6)

5

(7.6)

2

(13.6)

3 (11.0)

3

(10.6)

5

(15.2)

10

(14.0)

3

(19.2)

5 (17.5)

5

(16.7)

5

(15.2)

10

(14.0)

3

(19.2)

5 (17.5)

(24.2)

(22.0)

15

(21.0)

5

(30.4)

(24.2)

10

(28.0)

20

(27.0)

5

(30.4)

10 (32.0)

10

(31.0)

10

(28.0)

25

(34.0)

MA0.16U

15.901U

0.1/ 0.12/0.14/0.16

MA0.25U

15.902U

0.16/0.19/0.22/0.25

MA0.40U

15.903U

0.25/0.30/0.35/0.40

MA0.63U

15.904U

0.40/0.48/0.56/0.63

MA1.0U

15.905U

0.63/0.75/0.87/1.0

MA1.6U

15.906U

1.0/1.2/1.4/1.6

MA2.5U

15.907U

1.6/1.9/2.2/2.5

MA4.0U

15.908U

2.5/3.0/3.5/4.0

MA6.3U

15.909U

4.0/4.8/5.6/6.3

MA10U

15.910U

6.3/7.5/8.7/10

MA16U

15.911U

10/12/14/16

MA20U

15.912U

16/17/18.5/20

MA25U

15.913U

20/21.5/23/25

MA32U

15.914U

25/27/30/32

MA40U

15.915U

32/34/37/40

Note: HEA - Horsepower Equivalent Amperes, the nominal amperage assigned to standard motor horsepower ratings in design guide tables such as

NFPA-70 Tables 430-248, 430-249, 430-250; UL1077 Table 16.2; CSA - C22.2 No. 235-M89 Tables 44 and 45; CSA-C22.2 No. 14-M91 Table 19, etc. Multiply

HEA values (in parenthesis) by 1.1 if power factor is 90%, and by 1.2 if power factor is 80%.

a The standard-circuit short-circuit rating is 14kA for all types. Group ratings can be used in a standard circuit (e.g., MA1.0U at 42kA), but a higher

standard rating cannot be used in a group circuit (e.g., MA40U at 14kA only in standard circuit.)

FLA Dial

Adjustment

Markings

Cat. No.

Type and

Rated

Current

3Ø HORSEPOWER RATINGS AT NOMINAL LINE VOLTAGE

(See Note for HEA Definition)

110-120V

HP (HEA)

200V

HP (HEA)

208V

HP (HEA)

GROUP SHORT

CIRCUIT RATING

AT 480VACa

(and BCP size)

symmetrical

(max. 1200A

MCCB

or RK5)

symmetrical

(max. 350A

MCCB

or RK5)

symmetrical

(max. 350A

MCCB

or RK5)

220-240V

HP (HEA)

460-480V

HP (HEA)

Through MA2.5U, ampere rated for motor circuits having a full-

load-amperage (FLA) not exceeding the MA’s general purpose

rated current (RC, equals maximum dial setting) and a locked

rotor current not exceeding 6 times the MA’s RC.

MA- Series

Three Phase Adjustable Trip

Miniature Circuit Breakers/

Manual Motor Controllers

The MA was designed to handle the high

inrush loads of 3 phase transformers,

power supplies, motors, etc. The MA

protects wiring and equipment from

damage caused by the three major

classes of over-current, yet greatly reduc-

es the number of nuisance trips in high

starting and inrush current circuits.

An IEC device with excellent ratings under

a UL listing at 480Y/277V (including group

ratings) and at 500V under international

standards, the Altech/ABL Sursum MA

provides short and long term cost effective

circuit protection for USA and/or export

applications. The short term advantages

include: (1) adjustable thermal trip allows

finalization of initial designs before

procurement of the load equipment is

complete; (2) snap-on mounting for readily

available, internationally standardized DIN

Rail saves panel layout design time as well

as installation and change labor; (3) large

cage-clamp terminals with screws suitable

to power screwdrivers, simplifies and

speeds

wiring; (4) convenient switched

disconnect during factory testing and/or

initial start-up saves time and aggravation.

The key long term advantage is customer

satisfaction and proven over-current pro-

tection of wiring and equipment (and the

lack of rework/repair costs).

UL508 listed

E137938

CAN/CSA-C22.2 No.14 certified

Type Designation

MA

RT

__

__

__

__

(a)

(b)

(c)

(d)

(a) = MA - Manual Motor Controller

(b) = Rated Current

(c) = U - US Housing

(d) = Blank - Standard Terminal

RT - Ring-tongue Terminal

Voltage Rating

AIC (Interrupt Capacity)

Standard Short Circuit Withstand Rating

(UL/CSA Ratings)

Group Short Circuit Ratings

(UL/CSA Ratings)

Typical Life

Calibration Temperature

Standard Pack and Weight

Terminal Size Acceptability

480Y/277VAC

0.16A-2.5A: 42kA; 4.0A-16A: 14kA; 20A-40A: 10kA

0.16A-2.5A: 42kA; 4.0A-16A: 14kA

see above

6000 on/off operations with 2xRC

25°C, +0°, -5° (77°F, +0° -9°)

1/450g (1.0 lb.)

Top/Bottom: 18-3 AWG