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Heavy-Duty 30-5mm Metal Selector Switches
TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
10250T-SS Series Selector Switches
  • Heavy-Duty Zinc Die Cast Construction
  • Enclosed Silver Contacts with Reliability Nibs
  • Diaphragm Seals with Drainage Holes
  • Grounding Nibs on Operator Casing
 Manuals (contact with email : [email protected])


The 30.5 mm selector switches features a zincdie cast construction with chrome-platedhousing and mounting nut.

The contact blocks feature enclosedsilver contacts with pointed "reliabilitynibs" for reliable performance from logiclevel up to 600V. To ensure reliableswitching, nibs bite through oxide whichcan form on silver contacts, eliminatingthe need for expensive logic level blocksfor most applications.

Reliability nibs improve performance indry circuit, corrosive, fine dust and othercontaminated atmospheres.

Under normal environmental conditions, theminimum operational voltage is 5V and theminimum operational current is 1 mA,AC/DC. For operation under a wider range ofenvironmental conditions, logic level contactblocks with inert palladium tipped contactsare recommended.

10250T-SS Series operators have groundingnibs–4 metal points on the operatorcasting designed to bite through most paintsand other coatings on metal panels toenhance the ground connection when theoperator is securely tightened.

trodeks’s selector switch operators offer front ofpanel drainage via holes in the operatorbushing. Hidden from view by the mountingnut, these holes prevent buildup of liquidinside the operator, which can preventoperation in freezing environments. Theholes also provide a route for escaping liquid in high pressure washdowns, effectivelyrelieving pressure from the internaldiaphragm seal. This ensures reliable sealingin applications even beyond NEMA 4.

Standards and Certifications: CE EN60947-5-1
    UL 508: File No. 131568
    CSA C22.2 No. 14: File No. LR68551
Ingress Protection (When Mounted inSimilarly 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:

    Key and Lever Selector Switches: 3000 operations per hr
    Contact Blocks: 10,000,000 operations
    Lever and Key Selector Switches: 250,000 operations
    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')
    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
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