Heavy-Duty 30.5mm Metal Push Buttons, Contact Blocks/Legend PlateHeavy-Duty 30.5mm Metal Push Buttons, Selector Switches, Contact Blocks, Legend Plates and Pushbutton Enclosures
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- Heavy-Duty Zinc Die Cast Construction
- Enclosed Silver Contacts with Reliability Nibs
- Diaphragm Seals with Drainage Holes
- Grounding Nibs on Operator Casing
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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.
Standards and Certifications:
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
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
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
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
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
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