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.)	Recommended replacement	Remarks
6 A	DPST-NO/ SPST-NC	MA306-21(-US)		J7L-BR-22	See note 6.
	DPST-NO/ SPST-NC	MA406N-22(-US) MA406NB-22		J7L-BR-22
	3PST-NO	MA306-30		J7L-BR-31
	3PST-NO/ SPST-NC	MA406N-31(-US) MA406NB-31		J7L-BR-31
	3PST-NO/ 3PST-NC	MA306(-US) MA306Z (See note 2)	MA306A(-US)	J7L-BR-31 + J73L-B-02
	4PST-NO	MA406N-40(-US) MA406NB-40		J7L-BR-40
	4PST-NO/ 4PST-NC	MA406N (See note 3)		J7L-BR-40 + J73L-B-04		See 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 A	DPST-NO/ SPST-NC	MA415N-22		None	See note 7.
	3PST-NO/ SPST-NC	MA415N-31
	4PST-NO	MA415N-40
	4PST-NO/ 4PST-NC	MA415N (See note 3.)				See note 10.
	4PST-NO/ 4PST-NC	MA415N	MA415N(-US)
	6PST-NO/ DPST-NC		MA415N-62(-US)
20 A	3PST-NO/ DPST-NC	MA520N-32		None	See note 8.
	4PST-NO/ SPST-NC	MA520N-41
	5PST-NO	MA520N-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

Items	MA	J7L	Remarks
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.
Dimensions	MA306: 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.