70500813 Crouzet USA, 70500813 Datasheet - Page 41

• 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
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Contact materials
Order/Technical Support – Tel: [phone] / FAX: [phone] / www.crouzet-usa.com
Choice of contact material
To choose the best material for the contacts
there are various factors to be considered:
- the current and voltages levels
- the type of load
- the number of operations
- the switching frequency
- the environmental conditions.
Contacts for general-purpose use
Our switches are normally fitted with silver
contacts. These are suitable for the majority of
applications and provide the best compromise
between electrical performance, thermal
performance and life.
Contacts for low-power circuits
E < 20 V and/or I < 100 mA
The contacts used in this case are plated with
gold (or a gold alloy) for good reliability even in
corrosive atmospheres.
Contacts for special applications
We can supply special contacts suitable for
particular applications, such as:
- Ag CdO contacts for very high drawn
- Cross Bar gold-plated Ag Ni contacts which
currents,
allow a very wide range of applications to be
covered by a single type of switch.
Products and specifications subject to change without notice.
Electrical recommendations
A
B
C
D
Inductive circuits
To increase the life of contacts and their DC
rating, arcing on opening can be cut down by
using the following circuits:
- for DC
Fast diode V R > 5 x V nominal
- for DC or AC
Very low power circuits
In very low power circuits (I > 1 mA, V ≤ 5 V),
switching is highly sensitive to environmental
conditions (the atmosphere, pollution).
If the supply is powerful enough, adding a
passive resistor to increase the current broken
by the switch to a few milliamps will
substantially improve reliability of operation.
R - Load resistance
C - Very low current load
C - Varistor circuit across load
D - Varistor circuit across switch
V > V peak supply
E (J) ≥ –––––––
A - RC circuit across inductor
B - RC circuit across switch
C (nF) ~100 x I nominal (A)
V insulation > V peak
R(Ω ) ~ load resistance (Ω )
P (V.A.)
I nominal > 10 x I winding
100