70500813 Crouzet USA, 70500813 Datasheet - Page 40

• Manufacturer Part Number: 70500813
• Description: E ACT FOR SW-83101-112,154 R=4
• Manufacturer: Crouzet USA

Specifications of 70500813

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Snap Action Switches – Technical Guide
Dielectric characteristics
Order/Technical Support – Tel: [phone] / FAX: [phone] / www.crouzet-usa.com
Number
of
operations
220
110
Current rating
This is the current the switch is capable of
making and breaking which forms the basis for
the life tests.
Thermal rating
This is the current the switch will withstand
when not being operated, for a temperature
rise of not more than 60 °C.
Switch rating
AC voltages: see the current rating.
With DC voltages the switch rating is very much
dependent on the voltage, the contact gap
(CG) and the nature of the load being switched.
There is a risk of prolonged or indeed
permanent arcing if the following limits are
exceeded:
These indicate the electrical life of the
switches, under standard conditions (20 °C,
1 cycle/2 seconds), by showing the number of
switching operations which can be performed
with given types of load.
For special applications, please enquire.
Operating curves
48
24
12
Limit of constant current D.C.
Resistive circuit
Inductive circuit
EC=0.4 mm
0.3 0.5
CG=0.4 mm
Resistive load
Inductive load L/R = 5 ms
1
Products and specifications subject to change without notice.
2
5
EC=3 mm
CG=3 mm
10 16
Rating in
Amps
Circuit types
= L
M
R
For a circuit with alternating voltage, this is in
phase with the current : Cos
Inductive circuit
Resistive circuit
A circuit of this type with direct current is
characterised by a time constant.
An inductive circuit, with alternating voltage, for
example, incorporating a motor (cos
cause current surges up to 6 times the normal
current. For certain switches, we give electrical
endurance curves with L = 5 ms in DC
and cos
Lamp and capacitance circuit
The currents at the time when the circuit is
closed are very high in this case, being up to
10 times the nominal figure.
Internal resistance
This consists of the intrinsic resistance (fixed)
of the parts carrying current and the contact
resistance (variable).
Close to the tripping point and release position,
the force holding the contacts together drops
considerably and this may cause a rise in
internal resistance.
Insulation resistance
The insulation resistance of the switches is
generally greater than 50,000 MΩ measured at
500 V DC.
Dielectric strength
The dielectric strength of our switches is
generally better than:
- 1500 volts between live parts and earth
- 1000 volts between contacts
- 600 volts between contacts for switches
whose contact gap is less than 0.3 mm.
= 0.8 in AC.
R
= 1.
< 1) can
3/107
3