HARDWARE / PRODUCTAdded 17 Jul 2026

Mark II Motorized Lightband (MLB)

Planetary Systems Corp (Rocket Lab)
Mark II Motorized Lightband (MLB)

Motorized spacecraft/launch-vehicle separation ring with 100+ on-orbit separations and a 100% flight success record.

Key figurescomparable across the catalogue

Payload capacity
544.31 kg

Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.

As published by the supplier

Bolt circle diameters available
8.000", 11.732", 13.000", 15.000", 18.250", 19.848", 23.250", 24.000", 31.600", 38.810" (in)
Fastener counts by size
12 to 60 fasteners depending on diameter
Max payload capacity
1,200 lb
Release mechanism
Dual-redundant electric release motor, non-pyrotechnic, pyro-pulse compatible
Material
Aluminum alloys
Flight heritage
100+ on-orbit separations, 100% mission success

About

The Mark II Motorized Lightband (MLB) is Planetary Systems Corporation’s flagship space vehicle separation system, used to separate spacecraft from launch vehicles and to separate launch vehicle stages. It is constructed of aluminum alloys, with a lower ring featuring hinged leaves and springs and a dual-redundant release motor, and an upper ring providing a load-bearing hinge interface. The system is non-pyrotechnic but pyro-pulse compatible, and can be configured to meet ISS redundancy requirements. It is offered across bolt-circle diameters from 8 to 38.8 inches and supports payloads up to 1,200 lb. The MLB has flown on more than 100 on-orbit separations with a 100% mission success record.

Documentation

Need the full ICD, test reports or a specific revision? Ask the supplier directly.

Source: web.archive.org ↗

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