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Supplemental and Obsolescence Digest 174

Molded Case Circuit Breakers

M-frame Thermal-Magnetic Circuit Breakers

 

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Table 3.30:

M-frame—Thermal-magnetic, Individually-Mounted Circuit Breakers, 600 Vac

Ampere Rating	AC Magnetic Trip Settingsa		Standard Interrupting		High Interrupting		Terminal Wire Range
	Low	High	Cat. No.	$ Price	Cat. No.	$ Price
2P, 600 Vac, 250 Vdc
300 A  350 A  400 A  450 A  500 A  600 A  700 A  800 A  900 A 1000 A	1500 A 1750 A 2000 A 2250 A 2500 A 3000 A 3500 A 4000 A 4500 A 5000 A	3000 A  3500 A  4000 A  4500 A  5000 A  6000 A  7000 A  8000 A  9000 A 10000 A	MAL26300 MAL26350 MAL26400 MAL26450 MAL26500 MAL26600 MAL26700 MAL26800 MAL26900 MAL261000	3973.00 3973.00 3973.00 3973.00 3973.00 3973.00 5146.00 5146.00 7341.00 7341.00	MHL26300 MHL26350 MHL26400 MHL26450 MHL26500 MHL26600 MHL26700 MHL26800 MHL26900 MHL261000	5219.00 5219.00 5219.00 5219.00 5219.00 5219.00 6438.00 6438.00 8141.00 8141.00	AL900MA (3) 3/0 AWG–500 kcmil
1200 A	5000 A	10000 A	MAL261200	8632.00	MHL261200	10168.00	AL1000MAb (4) 1/0 AWG–350 kcmil
3P, 600 Vac, 250 Vdc
300 A  350 A  400 A  450 A  500 A  600 A  700 A  800 A  900 A 1000 A	1500 A 1750 A 2000 A 2250 A 2500 A 3000 A 3500 A 4000 A 4500 A 5000 A	3000 A  3500 A  4000 A  4500 A  5000 A  6000 A  7000 A  8000 A  9000 A 10000 A	MAL36300 MAL36350 MAL36400 MAL36450 MAL36500 MAL36600 MAL36700 MAL36800 MAL36900 MAL361000	5040.00 5040.00 5040.00 5040.00 5040.00 5040.00 6618.00 6618.00 8470.00 8470.00	MHL36300 MHL36350 MHL36400 MHL36450 MHL36500 MHL36600 MHL36700 MHL36800 MHL36900 MHL361000	6304.00 6304.00 6304.00 6304.00 6304.00 6304.00 7921.00 7921.00 9385.00 9385.00	AL900MA (3) 3/0 AWG–500 kcmil
1200 A	5000 A	10000 A	MAL361200	10071.00	MHL361200	11741.00	AL1000MAb (4) 1/0 AWG–350 kcmil
a UL magnetic trip setting tolerances are ±25% for low and ±20% for high from nominal values shown. b The AL100MA lug is the only lug available for the 1200 A MA and MH circuit breakers.

 

 

Table 3.31:

M-frame—Thermal-magnetic, I-Line® Construction Circuit Breakers, 600 Vac

Ampere Rating	AC Magnetic Trip Settingsc		Standard Interrupting		High Interrupting		Terminal Wire Range
	Low	High	Cat. No.	$ Price	Cat. No.	$ Price
2P, 600 Vac, 250 Vdcd
300 A  350 A  400 A  450 A  500 A  600 A  700 A  800 A	1500 A 1750 A 2000 A 2250 A 2500 A 3000 A 3500 A 4000 A	3000 A  3500 A  4000 A  4500 A  5000 A  6000 A  7000 A  8000 A	MA26300( ) MA26350( ) MA26400( ) MA26450( ) MA26500( ) MA26600( ) MA26700( ) MA26800( )	4422.00 4422.00 4422.00 4422.00 4422.00 4422.00 5580.00 5580.00	MH26300( ) MH26350( ) MH26400( ) MH26450( ) MH26500( ) MH26600( ) MHL6700( ) MHL6800( )	5502.00 5502.00 5502.00 5502.00 5502.00 5502.00 6736.00 6736.00	AL900MA (3) 3/0 AWG–500 kcmil
3P, 600 Vac, 250 Vdc
300 A  350 A  400 A  450 A  500 A  600 A  700 A  800 A	1500 A 1750 A 2000 A 2250 A 2500 A 3000 A 3500 A 4000 A	3000 A  3500 A  4000 A  4500 A  5000 A  6000 A  7000 A  8000 A	MA36300 MA36350 MA36400 MA36450 MA36500 MA36600 MA36700 MA36800	5445.00 5445.00 5445.00 5445.00 5445.00 5445.00 7072.00 7072.00	MH36300 MH36350 MH36400 MH36450 MH36500 MH36600 MH36700 MH36800	6619.00 6619.00 6619.00 6619.00 6619.00 6619.00 8420.00 8420.00	AL900MA (3) 3/0 AWG–500 kcmil
c UL magnetic trip setting tolerances are ±25% for low and ±20% for high from nominal values shown. d 2P circuit breaker catalog numbers are completed by adding required phase connection letters as suffix to catalog numbers. See Phase Options table.

 

Table 3.32:

Interrupting Ratings

Voltage	MA/MAL	MH/MHL
240 Vac	42 kA	65 kA
480 Vac	30 kA	65 kA
600 Vac	22 kA	25 kA

 

Table 3.33:

Phase Options

Phase Option Letter	2P	3P
AB AC BC	MA26800AB MA26800AC MA26800BC
ABC CBA		MA36800 MA36800CBA

 

 

Enclosures: see Digest Section 7

 

DE2	Discount Schedule

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Related Topics

Accessories  Page 3-24—3-26

OptionalLugs Page 3-27—3-28

Dimensions Page 3-36