Mounts on a backplate or DIN rail via the optional bracket. The power terminals accept up to 3.5 mm² conductors; control wiring uses spring-clamp connectors on the CN3/CN4 ports. For fieldbus integration, the MR-J4-500B-RJ010 takes an optional SSCNET III/H fiber-optic card — no on-board Ethernet, so plan for the fiber ring topology if you're connecting to a Mitsubishi PLC motion controller. The built-in dynamic brake resistor handles short deceleration cycles; for vertical loads or high-inertia systems, add an external regenerative resistor to the P-B terminals.
Mitsubishi MR-J4-500B-RJ010 Servo Amplifier, 500W, Active
MPNMR-J4-500B-RJ010
Mitsubishi MELSERVO-J4 series servo amplifier, MR-J4-500B-RJ010, current production, 6.80 kg.
$1,661.16Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Specifications
Specifications
| Parameter | Value |
|---|---|
| Weight | 6.80 kgs |
Product details
Frequently asked questions
What is the closest alternative to the MR-J4-500B-RJ010 in the MELSERVO family?
The MR-J5-500B is the higher-performance successor in the J5 series. It offers faster loop rates and supports absolute encoders natively, but it requires a different SSCNET III/H interface card and has a different mounting footprint. The J4 remains a valid choice for existing designs or where J5's extra bandwidth isn't needed.
What does the 6.80 kg weight tell me about handling?
At 6.80 kg, the amplifier is manageable for a single technician for bench work or cabinet placement, but for overhead mounting or tight enclosures, two people are safer. It's a full-frame unit with a built-in heatsink and regenerative resistor, not a micro drive.
MPN
MR-J4-500B-RJ010