4K12T103 Equivalent & Substitute Parts

Part Overview

The 4K12T103 is a 12-key keypad switch manufactured by Storm Interface, featuring conductive rubber contacts with matrix output configuration. This panel-mount switch is rated for 0.05A @ 24VDC operation and supports a 3x4 key matrix with fixed telephone format legend. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign applications where continued functionality is required.

Substiute Parts

4K12T103

Storm InterfaceIn Stock: 8674K12T103 Datasheet

Current PartRFQ

3K12T103

Storm InterfaceIn Stock: 10303K12T103 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4K12T103 is determined by strict equivalence across the following critical parameters:

• Number of Keys & Matrix Configuration: Must be 12 keys in 3x4 matrix layout to maintain circuit board compatibility and firmware integration
• Switch Type & Contact Rating: Conductive rubber contacts rated for 0.05A @ 24VDC ensure electrical compatibility with existing control circuits
• Output Type: Matrix output is mandatory for proper signal routing and key detection logic
• Mounting Type & Panel Cutout Dimensions: Panel mount with 83.00mm x 64.00mm rectangular cutout ensures mechanical fit without redesign
• Termination Style: Pin header termination maintains connector compatibility with existing harnesses
• Regulatory Compliance: RoHS3 compliance and CE approval are required for continued operation in regulated environments

The 3K12T103 meets all substitution criteria and is classified as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The 3K12T103 is a direct functional equivalent to the 4K12T103 and is the appropriate substitute for applications requiring the 4K12T103. Both parts maintain identical electrical specifications, matrix configuration, and mechanical interface requirements.

The 3K12T103 offers enhanced operational characteristics including extended operating temperature range (-10°C ~ 85°C versus 0°C ~ 70°C), IP54 ingress protection rating, and doubled operational life (2,000,000 cycles versus 1,000,000 cycles). These improvements do not introduce incompatibility and provide additional margin for system reliability.

Both parts carry ROHS3 compliance and CE approval, ensuring regulatory alignment for continued deployment in controlled environments. The 3K12T103 is currently in active production status, providing supply chain continuity for the obsolete 4K12T103.

Frequently Asked Questions (FAQ)

Q: Can the 3K12T103 be used as a direct replacement for the 4K12T103 without circuit board modifications?

A: Yes. The 3K12T103 maintains identical matrix configuration (3x4), contact rating (0.05A @ 24VDC), panel cutout dimensions (83.00mm x 64.00mm), and pin header termination. No circuit board redesign is required.

Q: What are the key differences between the 4K12T103 and 3K12T103?

A: The 3K12T103 provides extended operating temperature range (-10°C ~ 85°C), IP54 ingress protection, and increased operational life (2,000,000 cycles). The 4K12T103 operates within 0°C ~ 70°C with 1,000,000 cycle rating and no specified ingress protection.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the 4K12T103 and 3K12T103 are ROHS3 compliant and CE approved, meeting current regulatory requirements.

Q: What is the packaging difference between these parts?

A: The 4K12T103 is supplied with dash packaging, while the 3K12T103 is supplied in bulk packaging. This affects order quantities and handling but does not impact electrical or mechanical compatibility.

Q: Is the 3K12T103 suitable for applications requiring extended temperature operation?

A: Yes. The 3K12T103 operating temperature range of -10°C ~ 85°C accommodates extended environmental conditions beyond the 4K12T103 specification of 0°C ~ 70°C.