Carbon Pill Conductive Rubber Keypad 50 Shore A Silicone Keypad For Industrial Control Panel

Carbon Pill Conductive Rubber Keypad

This carbon pill conductive rubber keypad is compression molded from 50±5 Shore A silicone rubber and fitted with molded carbon pills on the contact side. When a key is pressed, the carbon pill bridges the PCB pad pair and closes the circuit without any metal dome or mechanical switch. The result is a sealed, long-life keypad with a soft tactile feel that suits control panels used in dust, moisture and high-cycle environments.

Application Scenarios

• Industrial control panels & machine HMI: sealed front panels for CNC machines, packaging lines, inverters and instrument housings.
• Medical and laboratory equipment: wipe-down control panels for analyzers, patient monitors and sterilizable device housings.
• POS and payment terminals: numeric keypads on payment terminals, vending machines and ticketing kiosks.
• Two-way radio and intercom: PTT and channel keys on handheld radios, door intercoms and dispatch consoles.
• Household appliances: control keys for air conditioners, induction cookers, washing machines and water purifiers.
• Security and access control: outdoor door entry keypads and locker control panels.

Simple Parameter Table

Quality Assurance

• ISO 9001 quality system: incoming material, in-process and outgoing inspection are recorded for every production lot.
• Material control: silicone compound is checked for hardness, tensile strength and elongation before molding; SGS, RoHS and REACH reports are available on request.
• 100% contact test: every keypad is pressed on a test fixture to verify carbon pill contact resistance and key force before packing.
• Reliability testing: 500,000-cycle key life test, −40 °C to +80 °C ageing, 85 °C / 85% RH damp heat and alcohol rub legend test on sample lots.
• Outgoing inspection: AQL 0.65 major / 1.5 minor, with a test report issued for each shipment.

Packaging Specification

• Each keypad is separated by PE film, then packed in an anti-static PE bag.
• Inner box: 5-ply corrugated, 200 pcs per box, with desiccant sachet.
• Outer carton: export-grade 5-ply carton, 2,000 pcs per carton, carton weight under 18 kg.
• Carton marking follows the buyer's shipping marks; pallet packing with corner protection is available for sea freight.
• Custom retail packing, barcode labelling and drop-test verified packaging can be arranged on request.

After-Sales Service

• 12-month warranty on keypad function from the date of shipment.
• Technical reply within 24 hours on working days, with English drawing review support.
• Free replacement for any confirmed contact or dimension defect caused by our production.
• Tooling maintenance and repair service during the tool life; wear parts replaced at cost only.
• Replacement stock for urgent production lines shipped within 3 working days.

Factory Scale

• 15 years in silicone rubber molding, with an in-house tooling shop for fast sampling.
• 30 sets of compression molding presses, 4 sets of CNC engraving and laser etching machines.
• Monthly capacity of 500,000 keypads, supported by a dedicated inspection team.
• Separate dust-controlled printing and epoxy coating area for backlit legends.
• Export experience to Europe, North America and Southeast Asia, with full export documentation support.

FAQ

Q: What is the MOQ for a custom keypad?
A: 2,000 pcs per design. Trial orders of 500 pcs can be discussed for new projects.

Q: How long does sampling take?
A: 7–10 working days for a new tool, 3–5 working days for a sample from an existing tool. Tooling cost is quoted separately and can be refunded against quantity orders.

Q: Can you produce from our 2D/3D drawing or a physical sample?
A: Yes. Send the drawing in STEP, DWG or PDF, or a physical sample, and we will confirm key layout, hardness, legend and contact type before tooling.

Q: Can the keypad be backlit or epoxy coated?
A: Yes. Laser etched backlit legends, epoxy dome coating, matt oil coating and luminous material are all available.

Q: What is the normal lead time?
A: 7–15 working days for repeat orders after sample approval, 18–25 working days for the first mass production run.