CT-M glass-sealed hermetic receptacles, round-flange and square-flange
CT-M glass-sealed hermetic receptacles, flange and threaded versions

CT-M Glass-Sealed Hermetic Receptacles, −55 to +200 °C

Glass-to-metal seal · 152 kPa leak-tight · −55 to +200 °C

CT-M receptacles are small glass-to-metal sealed hermetic receptacles for equipment that must stay gas-tight across a bulkhead or enclosure wall. They show no leakage at 152 kPa pressure differential, operate from −55 to +200 °C and resist fluid immersion.

Sealing
No leakage at 152 kPa
Contacts
2 to 5
Current rating
7.5 A / 13 A
Temperature
−55 to +200 °C
Rated voltage
250 V

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Key features

  • Glass-to-metal sealed contacts
  • No leakage at 152 kPa pressure differential between inside and outside
  • −55 to +200 °C operating temperature
  • Resistant to immersion in four types of fluid
  • Threaded coupling (UNEF or metric) or bayonet (CT6-3M); square-flange and round-flange bodies
  • Contacts Ø 1.0 mm (7.5 A) and Ø 1.6 mm (13 A)

Specifications

Electrical
ParameterValueCondition
Rated voltage250 V
Test voltage1500 V / 1125 VRoom temperature / humidity
Insulation resistance≥ 500 MΩ / ≥ 20 MΩRoom temperature / humidity
Sealing and environmental
ParameterValueCondition
HermeticityNo leakage152 kPa pressure differential
Operating temperature−55 to +200 °C
Humidity95 % at +50 °C
Vibration5–2000 Hz, 196 m/s²
Bump10,000 bumps, 196 m/s², 40–100 per minute
Acceleration245 m/s²
Fluid immersionFour fluids
Salt spray48 h
Durability500 mating cycles

Parameters not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing.

Models

ModelContactsCoupling thread
CT1-2M2 × Ø 1.60.625-24 UNEF
CT2-3M3 × Ø 1.00.5625-24 UNEF
CT3-3M3 × Ø 1.00.5625-24 UNEF
CT4-3M3 × Ø 1.00.5625-24 UNEF
CT4-3M13 × Ø 1.00.5625-24 UNEF
CT5-3M3 × Ø 1.00.5625-24 UNEF
CT6-3M3 × Ø 1.0Bayonet
CT7-2M2 × Ø 1.60.625-24 UNEF
CT10-5M, CT10-5M15 × Ø 1.00.6875-24 UNEF
CT12-3M, CT13-3M3 × Ø 1.00.5625-24 UNEF

Other contact counts and sizes on request.

Contact sizes and current ratings

Contact sizeEngaging diameterContact resistanceCurrent ratingWire size
Ø 1.0 mm1.0 mm≤ 15 mΩ7.5 A—
Ø 1.6 mm1.6 mm≤ 7.5 mΩ13 A—

How to order

CT [design] - [contacts] M [variant]

Example: CT4-3M1 — Design 4, 3 contacts, hermetic receptacle, variant 1

Code segmentOptions
Design
  • 1–7, 10, 12, 13, 14 Design number
Contacts
  • 2, 3, 5 Number of contacts
M
  • M Hermetic receptacle
Variant
  • 1, 2, 3 Variant

Contact counts and terminations

Standard contact counts

  • 2
  • 3
  • 5

Terminations

  • Solder

Typical applications

  • Pressurized and sealed enclosures
  • Vacuum and gas-filled equipment
  • Sensors and instruments
  • High-temperature electronics

Frequently asked questions

What does glass-to-metal sealed mean?

Each contact is fused into the shell with glass, so gas and moisture cannot pass through the connector. CT-M shows no leakage at 152 kPa pressure differential.

Selection guides

Related series

From sample to production

  1. Send your requirements

    Part number, drawing, pin-out or a short description of your application.

  2. Configuration and quote

    Our engineers match the configuration and reply with a drawing and quotation.

  3. Samples

    Samples are built to order. The minimum order quantity is 10 pieces, and samples and production orders each take 4–8 weeks. Third-party testing to your specification is available on request.

  4. Your approval

    You test the samples in your own equipment and approve them.

  5. Series production

    Production follows the approved sample configuration, with machining, molding, plating and assembly in our own Shenyang factory.

Need a quote or a drawing?

Send your part number, pin-out or drawing. Every inquiry is acknowledged by email within 1 business day, and an engineer follows up with a matched configuration, drawing or quotation.

Request a quote