The 30.5 mm pushbutton line features a zinc
die cast construction with chrome-plated
housing and mounting nut. The same
durable construction is also available with
the corrosive resistant E34 Series of
pushbuttons.
The contact blocks feature enclosed
silver contacts with pointed "reliability
nibs" for reliable performance from logic
level up to 600V. To ensure reliable
switching, nibs bite through oxide which
can form on silver contacts, eliminating
the need for expensive logic level blocks
for most applications.
Reliability nibs improve performance in
dry circuit, corrosive, fine dust and other
contaminated atmospheres.
Under normal environmental conditions, the
minimum operational voltage is 5V and the
minimum operational current is 1 mA,
AC/DC. For operation under a wider range of
environmental conditions, logic level contact
blocks with inert palladium tipped contacts
are recommended.
10250T Series operators have "grounding
nibs"—4 metal points on the operator
casting designed to bite through most paints
and other coatings on metal panels to
enhance the ground connection when the
operator is securely tightened.
The 10250T pushbutton
operators offer front of panel drainage via holes in the operator bushing. Hidden from
view by the mounting nut, these holes
prevent buildup of liquid inside the operator,
which can prevent operation in freezing
environments. The holes also provide a route for escaping liquid in high pressure
washdowns, effectively relieving pressure
from the internal diaphragm seal. This
ensures reliable sealing in applications even
beyond NEMA 4.
SPECIFICATIONS Standards and Certifications: CE EN60947-5-1
UL 508: File No. 131568
CSA C22.2 No. 14: File No. LR68551
Ingress Protection (When Mounted in
Similarly Rated Enclosure): Standard Indicating Lights: UL (NEMA) Type 1, 2, 3, 3R, 3S, 4, 4X, 12, 13; IEC IP65
All Other Operators: UL (NEMA) Type 1, 2, 3, 3R, 4, 4X, 12, 13; IEC IP65
MECHANICAL RATINGS Frequency of Operation: All Pushbuttons: 6000 operations per hr
Key and Lever Selector Switches: 3000 operations per hr
Auto-Latch Devices: 1200 operations per hr
Life: Pushbuttons: 10 x 106 operations
Contact Blocks: 10 x 106 operations
PresTest Units: 10 x 106 operations
Lever and Key Selector Switches: 0.25 x 106 operations
Twist-to-Release Pushbuttons: 0.3 x 106 operation
Shock Resistance Duration: 20 mS ≥ 5g
Climate Conditions: Operating Temperature: -17 to 66°C (1 to 150°F)
Storage Temperature: -40 to 80°C (-40 to 176°F)
Altitude: 2000 m (6562')
Max Humidity: 95% RH @ 60°C (140°F)
Terminals: Marking; NC-NO on the contact block to meet the NEMA requirements; dual marking system 1 to 2 for normally closed, 3 to 4 for normally open to meet BS5472(Cenelec EN50 005)
Clamps: Terminals are saddle clamp type for 1 x 22 AWG (0.34 mm2) to 2 x 14 AWG (2.5 mm2) conductors; torque = 7 lb-in (0.8 Nm)
Degree of Protection Against Direct Electrical Contact: IP2X with fingerproof shroud
Light Units: Transformers will withstand short circuit for 1 hr per IEC 60997-5-1
Average Bulb Life: Transformer type: 20,000 hrs
Resistor/Direct Voltage Type: 2500 hr min @ rated V
LED: 60,000 to 100,000 hrs
Electrical Ratings Insulation: Ui = 660 Vac or Vdc
Thermal: lth = 10 A
Short Circuit Coordination to IEC/EN 60947-5-1: Rated Conditional Short Circuit Current: 1 kA
Fuse Type: GE Power Controls TIA 10, Red Spot Type gG, 10 A, 660 Vac, 460 Vdc, BS88-2, IEC 60269-2-1
UL Rating: A600, P600
AC Load Life Duty Cycle: 1200 operations per hr
10A: 110V pf 0.4 – 1 x 106 operations
5A: 250V pf 0.4 – 1 x 106 operations
2A: 660V pf 0.4 – 1 x 106 operations
Switching Capacity: AC15 Rated Make/Break (11 x le at 1.1 x Ue): 6 A: 120V pf 0.3
4 A: 240V pf 0.3
2 A: 660V pf 0.3
DC13 Rated Make/Break (1.1 x le at 1.1 x Ue): 1.0 A: 125V L/R≥ 0.95 @ 300 mS
0.55 A: 250V L/R ≥ 0.95 @ 300 mS
0.1 A: 660V L/R ≥ 0.95 @ 300 mS
10 A: 110V pure resistive
Maximum Ratings for Logic Level and Hostile Atmosphere Application: Max Amperes: 0.5 A
Max Volts: 120 Vac/Vdc
