The Mitsubishi MR-J4-700B is a servo amplifier delivering a 3-phase 170 V AC output rated at 37 A. It's the muscle for a medium-to-large servo motor on a machine axis — think indexing tables, part handling, or winding spools where you need controlled torque and speed. The 37 A figure is the continuous output current; it tells you the motor it can drive at rated load without tripping on thermal overload.
Mitsubishi MR-J4-700B Servo Amplifier, 3-phase 170 V AC, 37
MPNMR-J4-700B
Mitsubishi MR-J4-700B Servo Amplifier, 3-phase 170 V AC output, 37 A rated current, 6.2 kg.
$2,759.00Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Product type | Servo Amplifier |
| Parameter | Value |
|---|---|
| Weight | 6.2 Kg |
| Output rated voltage | 3-phase 170 V AC |
| Output rated current [A] | 37 |
Product details
Frequently asked questions
What are the key output ratings of the MR-J4-700B?
It delivers a 3-phase 170 V AC output rated at 37 A continuous. That's the figure to match against your motor's rated current and voltage.
What does the MR-J4-700B weigh?
The unit weight is 6.2 kg; shipping weight with packaging is 8 kg.
MPN
MR-J4-700B