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Item #: 12K100N=50-7
Black color. For size 50 mm lamination ring.
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Black DynamicArm with optional removable carbon shell. 13Z157=* carbon shell is sold separately.

The 12K100N DynamicArm is a myoelectrically-controlled elbow joint driven by an electric motor and is intended users with transhumeral or higher amputation levels. DynamicArm Plus (12K110N) is available for users with more than 2 myo-signals.

The DynamicArm combines all advantages of ErgoArm Electronic plus. Furthermore, it is controlled entirely by myoelectric signals. In addition to hand and rotation of wrist joint, elbow joint flexion can also be controlled by muscle signals.

Additional benefits:

  • High lifting and holding force
  • Natural, delicate control with quick, precise positioning
  • Attractive appearance
  • Low noise level, no noise at all during free swing
  • Natural free swing behavior

The prosthesis is particularly inconspicuous, thanks to operating noise optimized by sound engineering as well as the slightly dampened – and completely silent – free swing phase. These special technology features are integrated in an elbow joint-forearm system with a natural, anatomic design. The shape and basic color blend in with the overall image of the human body. Silicone elements dampen noise and shocks that are caused, for example, when leaning on a hard surface.

The 12K100N DynamicArm is now even more natural and reliable. This is achieved through the following innovations:

  • The elastomer protector in the hollow of the elbow joint has been removed. All other protectors are now the same color as the rest of the forearm, providing a more natural look.
  • A powerful Bluetooth module, which provides an optimised connection, permits secure configuration via a computer.
  • Thanks to the modified strap clamp, trial fittings are easier and faster. The strap cable mounting has been modified so that the DynamicArm can be threaded directly into the lamination ring on the socket.
  • The stain gauge compensates for temperature fluctuations even more reliably.
  • Thanks to these improvements, and based on a new warranty, maintenance is only required every 24 months.

DynamicArm can be combined with other myoelectric prosthetic components from Ottobock, such as:

  • 10S17 Electric Wrist Rotator
  • 8E38=* System Electric Hand
  • 8E33=* System Electric Greifer

Following components can not be used in combination with DynamicArm:

  • 8E39=* and 8E41=* System Electric Hand
  • 8E34=* System Electric Greifer
  • 8E44=* Transcarpal Hand
  • 8E51=* Electric Hand 2000

The DynamicArm can be configured using the 646C42 ElbowSoft software. In order to do so, DynamicArm is connected to PC using an integrated Bluetooth module.


Scope of delivery:

  • DynamicArm 12K100N*
  • Dummy for electric wrist rotator
  • Battery charger with EU and US plug
  • Lamination ring
  • Assembly hook
  • Alignment tool
  • 2 Year Manufacturer's Warranty

Optional items ordered separately:

  • Coaxial plug or Electric wrist rotator
  • Input device & cables
  • 3rd Year Extended Warranty: DynamicArm SP-12K100N=3


Ordering information
Article Number Upper arm connection For hand size For lamination ring Color
12K100N=45 70 mm 6 3/4 to 7 1/4 45 mm No. 4
12K100N=50 70 mm 7 3/4 to 8 1/4 50 mm No. 4
12K100N=50-1 70 mm 7 3/4 to 8 1/4 50 mm No. 11
12K100N=50-2 70 mm 7 3/4 to 8 1/4 50 mm No. 15
12K100N=50-7 70 mm 7 3/4 to 8 1/4 50 mm Black
Technical data
Power supply Li-Ion battery
Charging temperature > 0 degrees C
Weight (dependent on forearm length) approx. 1,000 g
Maximum lifting force 50 N
Maximum lift weight 13 lbs / 6 kg
Flexion angle approx. 15 degrees to 145 degrees
Operating temperature 5 to 40 degrees C
Storage and transport temperature in original packaging -25 to 70 degrees C
Available Colors
Article Number Model Size Color Number Color Description
12K100N=45 DynamicArm 45mm 4 Tan
12K100N=50 DynamicArm 50mm 4 Tan
12K100N=45-7 DynamicArm 45mm 7 Jet Black
12K100N=50-7 DynamicArm 50mm 7 Jet Black
12K100N=50-1 DynamicArm 50mm 11 Medium Brown
12K100N=50-2 DynamicArm 50mm 15 Dark Brown
12K110N=45 DynamicArm Plus 45mm 4 Tan
12K110N=50 DynamicArm Plus 50mm 4 Tan
12K110N=45-7 DynamicArm Plus 45mm 7 Jet Black
12K110N=50-7 DynamicArm Plus 50mm 7 Jet Black
12K110N=50-1 DynamicArm Plus 50mm 11 Medium Brown
12K110N=50-2 DynamicArm Plus 50mm 15 Dark Brown


Refine results

UL Documentation Packet

Reimbursement: Documentation Guide


PDF Document | Published: Feb 28, 2020

12K100N DynamicArm Casting and Lamination Instructions

Product Information

PDF Document | Published: Jul 15, 2015

DynamicArm and DynamicArm Plus Order Form

Order Form

PDF Document | Published: Feb 22, 2022

12K100N DynamicArm Specification Sheet

Product Information

PDF Document | Published: Aug 22, 2023