Brakes

Dunkermotoren E46A Power-On Brake

Name: E46A Dunkermotoren E46A Power-On Brake
SKU: E46A

The Dunkermotoren E46A is a 24 Vdc power-on brake rated at 0.3 Nm nominal torque: the entry point of the power-on series. A power-on brake applies torque when it is energised and releases when supply is removed: the opposite of the power-off brakes in the Dunkermotoren range. It is specified where braking is a commanded function rather than a fa...

The E46A draws 0.26 A at 6.3 W nominal input power, engaging in 8 ms and releasing in 5 ms. That 5 ms release is the fastest of any brake on this page, which suits it to short-cycle indexing work where the time spent freeing the axis limits throughput. It measures 46 mm in diameter by 25.5 mm long and weighs 0.1 kg, the lightest brake in the range, and runs with low noise. Protection class is IP 20 as supplied. Brakes can be mounted to the motor openly or with covers in protection class up to IP65, and in combination with brushless motors they can be integrated into the motor profile housing at IP65. Connection is by 500 mm grey AWG 24 leads.

Power-on brakes are supplied on request. All rated values apply in the run-in condition.

Show Less

Select model number

Model:

or send a quick enquiry about this product only

Dunkermotoren E46A power-on electromagnetic motor brake with black housing and protruding shaft

Features

Power-on operation applies braking torque only when energised: the axis runs free when the machine is unpowered, for commanded rather than fail-safe braking
0.3 Nm nominal braking, the entry point of the power-on range, for light commanded axes
Engages in 8 ms and releases in 5 ms: the fastest release of any brake in the Dunkermotoren range, freeing the axis almost instantly
The lightest power-on brake at 0.1 kg (Ø46 mm, 25.5 mm long), minimal added mass on the axis
Low-noise operation for quiet installations
IP 20 as supplied, or up to IP 65 with covers
500 mm AWG 24 grey flying leads for direct wiring

Specifications

POWER-ON BRAKE SPECIFICATIONS
Nominal voltage	Vdc	24
Nominal torque⁽¹⁾	Nm	0.3
Torque range⁽¹⁾⁽²⁾	Nm	–
Nominal current⁽¹⁾	A	0.26
Nominal input power⁽¹⁾	W	6.3
Activation time	ms	8
Deactivation time	ms	5
Protection class	IP	20
Weight	kg	0.1
Noise	–	low noise
Diameter (Ø)	mm	46
Length (L)	mm	25.5
Strand colour GND	–	grey
Strand colour Vdc	–	grey
Strand length	mm	500
Strand type / cross section	–	AWG 24
(1) Values valid in run-in condition
(2) Over the temperature

Selection Table

Model	Nominal Voltage (Vdc)	Nominal Torque (Nm)	Torque Range (Nm)	Nominal Input Power (W)	Protection Class (IP)
E46A	24	0.3	–	6.3	20

Downloads

dunkermotoren-e46a-power-on-brake-datasheet.pdf

Warranty & Returns

Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.

FAQs

What torque does the Dunkermotoren E46A apply, and where does it sit in the range?

The E46A applies 0.3 Nm nominal torque on a 24 Vdc supply, the entry point of the power-on series: E46A at 0.3 Nm, E50A at 0.4 Nm, E105A at 1.7 Nm, E300A at 2.5 Nm and E605A at 4.5 Nm. Dunkermotoren does not publish a torque range over temperature for the E46A, so where a guaranteed band matters the E50A at 0.25–0.60 Nm is the closer specification.

What is the difference between a power-on brake and a power-off brake?

A power-on brake applies torque when it is energised and releases when supply is removed. A power-off brake does the reverse, it holds when de-energised, so the axis is caught automatically on power loss or emergency stop. Choose a power-on brake where braking is a commanded step in the cycle; choose a power-off brake from the E22R to E600R range where the load must not drift while the machine is unpowered. A power-on brake is not a fail-safe holding brake and should not be specified as one.

How quickly does the E46A engage and release?

The E46A engages in 8 ms and releases in 5 ms. That release is the fastest of any brake on the page, against 15 ms for the E50A, 40 ms for the E105A and 8 ms for the E300A, which makes it worth specifying for short-cycle indexing where throughput is limited by how quickly the axis is freed rather than how quickly it is caught.

How light is the E46A?

At 0.1 kg it is the lightest brake in the Dunkermotoren range, below the 0.12 kg E38R and E50A. It measures 46 mm in diameter by 25.5 mm long. Where rotating mass or overall assembly weight is constrained, that matters more than the modest 0.3 Nm rating suggests.

What supply does the E46A need and how much power does it draw?

The E46A runs on 24 Vdc drawing 0.26 A at 6.3 W nominal input power in the run-in condition.

What are the connection details of the E46A?

The E46A is supplied with 500 mm grey AWG24 leads, the longest lead length of the power-on series, alongside no other model at 500 mm. Both conductors are grey, so check polarity against the drawing before terminating.

Are the power-on brakes stock items?

Dunkermotoren supplies the full power-on series, E46A, E50A, E105A, E300A and E605A, on request rather than as standard catalogue items, so lead times differ from the power-off range. Contact sales@powerbox.com.au for current availability before designing one in.

How do I select the right brake for my Dunkermotoren motor?

Selection depends on the torque required at the axis, whether the brake must hold on power loss or only when commanded, the motor series it mounts to, and whether an IP 65 profile-housing installation is needed. Send your motor model and duty details to sales@powerbox.com.au and Powerbox will confirm the right brake and mounting arrangement.

Item added to your cart

Dunkermotoren E46A Power-On Brake

Enquiry Cart

Your Details

Dunkermotoren E46A Power-On Brake

Related Products