Suitable for In-building Electrical Power Applications
such as Power Distribution panel.

ZERO SCREW™ Terminal block EF2 series

Prevent fires in the power distribution panel by not using screws.
Shortening of construction hours.

ZERO SCREW™ Terminal Block EF2 series is a spring terminal block that can connect cables to electrical equipment such as power distribution in buildings without using screws. The elimination of screws saves installation works and maintenance. In addition, it prevents accidental fires triggered by the loosening of screws in electrical power applications.

ZERO SCREW™ Terminal Block EF2 series is a spring terminal block that can connect cables to electrical equipment such as power distribution in buildings without using screws.

Prevention of fire in electrical equipment
such as a power distribution panel.

Prevention of fire in electrical equipment such as a power distribution panel.

Failure of electrical equipment is the cause for approximately a quarter of the fires. If a fire occurs, the reliability of developers, construction companies and equipment suppliers will all be degraded, as well as endangering lives. One of the causes of ignition in this electrical equipment is loosening of the screw due to aging.
Since the ZERO SCREW™ terminal block EF2 series is spring-loaded, there is no concern of screw loosening. A good connection is maintained by IDC, and the fire risk of electrical equipment is reduced.

Reduction of work hours and shortening
of construction period

Reduction of work hours and shortening of construction period

The ZERO SCREW™ terminal block EF2 series connection method is a single action of inserting standard ring terminals.
Compared with the conventional screw-type terminal block, it is possible to eliminate the need for checking operations such as unscrewing, screwing, and torque checking. It is possible to reduce the number of work hours by more than 40% and thereby shorten the construction period.

Stable connection quality
which does not rely on operator’s skills

During electrical equipment maintenance, EF2 can standardizes the installation quality since there is no variation in operator skill, such as "tightening of screws is not appropriate" A stable connection is maintained regardless of the operator.

Introduction example

TAKENAKA CORPORATION

Utilization as a new main electricity junction, changes the construction process.

On November 30, 2017, TAKENAKA CORPORATION, which is involved in the construction of various facilities such as commercial buildings, stadiums, schools and educational facilities, etc., built, the "Meguro CENTRAL SQUARE", using our ZERO SCREW™ terminal block EF2 series which was adopted as the main electricity junction for the electric wire in the electrical equipment construction. We interviewed Mr. Shin Tomoyuki, Senior Manager, Mechanical & Electrical Engineering Department, Tokyo Main Office, TAKENAKA CORPORATION. (Published July 23, 2018)

ZERO SCREW™ Terminal Block EF2 Series Features

Easy connection with standard ring terminals

Quick and secure single action positive lock design. Unlike a conventional screw terminal block, the operator can maintain stable work quality even if they do not use to it. In addition, it is easy to use in narrow and dimly lit places.

Easy connection with standard ring terminals

Improvement of contact reliability

Unique design for pressing the ring terminal directly against the bus bar for connection. Contact reliability is improved and a stable connection is maintained over a long-term.

Improvement of contact reliability

Wiring work movie

Wiring in the board

Lead-in external lines

Work hours comparison

Application Example

Product lineup EF2 series

Series Applicable cable/
Rated current
Rated voltage Operating temperature Storage temperature Contact resistance Insulation resistance Withstanding voltage Durability
EF2-D30 1.25mm2=16A
2mm2=21A
3.5mm2=30A
5.5mm2=40A
600V
AC/DC
-25 to
+105℃
(Including the temperature rising by current flow.)
-10 to +60℃ 1mΩ
max.
(1A DC)
1000MΩ
min.
(500V DC)
2500 AC for 1minute 50 times
EF2-D60 5.5mm2=40A
8mm2=50A
14mm2=70A
EF2-D150 22mm2=94A
38mm2=132A
60mm2=175A
0.1mΩ
max.
(1A DC)
EF2-D250 150mm2=310A 1000V AC、
1500V DC
5000V AC for 1minute
EF2-D400 200mm2=400A