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FAQ03200 of General Purpose Relays FAQ

FAQ No. FAQ03200

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Question

What are the recommended replacement products for MA Contactors?

Answer



1.Replacement products for MA depend on the model number. Check in the following table.

Discontinued model (See note 1)Recommended
replacement
Remarks
Rated
carry
current
(See
note 2)
Contact
form
Before the N Series
(Production
discontinued in 1987)
(See notes 2, 3, and 4.)
A Series (Production
discontinued in 1995)
(See notes 5.)
6 ADPST-NO/
SPST-NC
MA306-21(-US)J7L-BR-22See
note 6.
DPST-NO/
SPST-NC
MA406N-22(-US)
MA406NB-22
3PST-NOMA306-30J7L-BR-31
3PST-NO/
SPST-NC
MA406N-31(-US)
MA406NB-31
3PST-NO/
3PST-NC
MA306(-US)
MA306Z (See note 2)
MA306A(-US)J7L-BR-31 + J73L-B-02
4PST-NOMA406N-40(-US)
MA406NB-40
J7L-BR-40
4PST-NO/
4PST-NC
MA406N (See note 3)J7L-BR-40 + J73L-B-04See
note 9.
4PST-NO/
4PST-NC
MA406N(-US)
MA406NB
MA406NZ (See note 2.)
MA406A(-US)J7L-BR-40 + J73L-B-04
5PST-NO/
SPST-NC
MA306A-51(-US)J7L-BR-31 + J73L-B-20
6PST-NO/
DPST-NC
MA406A-62(-US)J7L-BR-40 + J73L-B-22
15 ADPST-NO/
SPST-NC
MA415N-22NoneSee
note 7.
3PST-NO/
SPST-NC
MA415N-31
4PST-NOMA415N-40
4PST-NO/
4PST-NC
MA415N (See note 3.)See
note 10.
4PST-NO/
4PST-NC
MA415NMA415N(-US)
6PST-NO/
DPST-NC
MA415N-62(-US)
20 A3PST-NO/
DPST-NC
MA520N-32NoneSee
note 8.
4PST-NO/
SPST-NC
MA520N-41
5PST-NOMA520N-50
5PST-NO/
5PST-NC
MA520N

Note:

1.Discontinued models with "US" after the model number indicate that they are UL/CSA-approved models. The recommended replacement J7L-BR Auxiliary Relays are all UL and CSA approved even without the suffix "US".

2.Discontinued models with the suffix "Z" to the model number are bifurcated contact models with a 4-A rated carry current.

3.Only these discontinued models had DC coils. Other models only have AC coils. The DC coils came in 6, 12, 24, 48, 100, or 200 VDC, and the SPST-NC contacts are internally connected.

4.Discontinued model MA406N with the suffix "B" in the model number are models with diagonal mounting holes at various pitches.

5.The discontinued A-series Relays were able to be snapped onto DIN Track.

6.When the rated carry current is 6 A, the recommended replacement model is J7L-BR, or with J73L-B Surface-mounting Auxiliary Contact Units.

7.When the rated carry current is 15 A, there are no recommended replacement products. This is because none of the replacement models have contacts that can switch 15 A.
If the only reason that Relays require 15 A is to switch 3PST-NO contacts, the 3PST-NO contacts can be constructed using J7L-09-11 Contactors, and the remaining contacts can be built into the J7L-09-11. These can be mounted on a J73L-B, and be used as the replacement product.

8.When the rated carry current is 20 A, there are no recommended replacement products. This is because none of the replacement models have contacts that can switch 20 A.
If the only reason that Relays require 20 A is to switch 3PST-NO contacts, the 3PST-NO contacts can be constructed using J7L-18-11 Contactors, and the remaining contacts can be built into J7L-18-11. These can be mounted on J73L-B, and be used as the replacement product.

9.The recommended replacement model J7L-BR-40 has only 24-VDC DC-coil models. For other voltages, there are no recommended replacements.

10.The recommended replacement model J7L-09-11 has only 24-VDC DC-coil models. For other voltages, there are no recommended replacements.

2.Comparison of the MA and J7L

ItemsMAJ7LRemarks
Mounting
method
DIN track mounting: A-series only
Mounting holes in panel
MA306A: 27 x 50 diagonal corners
MA306: 27 x 52 diagonal corners
MA406N: 30 x 42 diagonal corners
MA406NB: 34 x 50 diagonal corners
MA406A, MA415A: 35 x 50 diagonal corners
MA415N: 38 x 43 diagonal corners
MA520N: 54 x 59 diagonal corners
DIN track mounting:
J7L-BR Auxiliary Relay
J7L-09, -18 Contactor
Mounting Holes inPanal
J7L-BR Auxiliary Relay
J7L-09, -18 Contactor
30 to 35 x 48 to 59 diagonal corners,
or 35 x 60 inverted diagonal corners
See note 1.
DimensionsMA306: 37 x 66 x 83 mm (W x D x H)
MA406N: 46 x 68 x 86 mm (W x D x H)
MA415N: 56 x 65 x 88 mm (W x D x H)
MA520N: 71 x 76 x 105 mm (W x D x H)
J7L-BR Auxiliary Relay: 44 x 80 x 87 mm (W x D x H)
J7L-09, -18 Contactor: 44 x 80 x 87 mm (W x D x H)
See note 2.
Rated load
and electrical
endurance
Rated carry current = 6 A
Resistive load: 220 VAC, 6 A or 24 VDC, 6 A, 500,000 operations
Inductive load: 220 VAC, 4 A or 24 VDC, 6 A, 500,000 operations
Rated carry current = 15 A
Resistive load: 220 VAC, 15 A or 24 VDC, 15 A, 500,000 operations
Inductive load: 220 VAC, 10 A or 24 VDC, 15 A, 500,000 operations
3-phase 220 VAC, 2.2kw motor, 300,000 operations (reference value)
Rated carry current = 20 A
Resistive load: 220 VAC, 20 A or 24 VDC, 20 A, 500,000 operations
Inductive load: 220 VAC, 13 A or 24 VDC, 16 A, 500,000 operations
3-phase 220 VAC, 3.7kw motor, 300,000 operations (reference value)
J7L-BR Auxiliary Relay
Resistive load: 220 VAC, 8 A or 24 VDC, 5 A, 250,000 operations
Coil load: 220 VAC, 3 A or 24 VDC, 3 A, 500,000 operations
J73L-B Surface-mounting Auxiliary Contact Unit
Resistive load: 220 VAC, 8 A or 24 VDC, 5 A, 250,000 operations
Coil load: 220 VAC, 3 A or 24 VDC, 3 A, 500,000 operations
J7L-09 Contactor
Class AC3: 220 VAC, 2.2kw, 2,500,000 operations
J7L-18 Contactor
Class AC3: 220 VAC, 3.7kw, 2,500,000 operations
See note 3.

Note:

1.New mounting holes must be made if screw-mounting Relays on a panel.

2.The replacement model is larger in depth. If using J73L-B, the height will increase by 30 mm, making it a total height of 117 mm.

3.If a model with a rated carry current of 6 A is replaced with J7L-BR or J73L-B, the electrical durability will decrease.

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