TP01121A-4K Resistive Touch Screen Overlay – Equivalent & Substitute Parts

Part Overview

The TP01121A-4K is a 12.1-inch resistive touch screen overlay manufactured by NKK Switches, featuring a 4-wire interface configuration. This component is classified as obsolete and is no longer in active production. Due to its discontinued status, identifying compatible substitute parts is essential for system maintenance, repair, and component sourcing. The TP02121A-4K serves as the direct successor in the NKK Switches product line, offering equivalent functional specifications with active product status and improved compliance certifications.

Substiute Parts

TP01121A-4K

NKK SwitchesIn Stock: 933TP01121A-4K Datasheet

Current PartRFQ

TP02121A-4K

NKK SwitchesIn Stock: 751TP02121A-4K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TP01121A-4K is determined by the following critical parameters:

• Diagonal Screen Size: 12.1" (307.34mm) – must match exactly for mechanical and optical compatibility
• Type: Resistive – technology type must remain consistent
• Physical Dimensions: Length, width, and height must align with mounting and integration requirements
• RoHS Compliance: ROHS3 Compliant status ensures regulatory alignment
• Moisture Sensitivity Level: MSL 1 (Unlimited) indicates no moisture-related constraints during storage and handling

The TP02121A-4K qualifies as a direct substitute based on matching all critical parameters. The transition from the TP01 series to the TP02 series represents a product line evolution while maintaining dimensional and functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The TP02121A-4K is the appropriate substitute for the obsolete TP01121A-4K. Both components maintain identical screen size, resistive technology, and physical dimensions. The TP02121A-4K offers the additional advantage of active product status, ensuring continued availability and supply chain reliability. Both parts maintain ROHS3 compliance and MSL 1 classification, confirming regulatory and environmental compatibility. The transition from TP01 to TP02 series represents a standard product line refresh without functional or mechanical compromise.

Frequently Asked Questions (FAQ)

Q: Can the TP02121A-4K directly replace the TP01121A-4K in existing installations?

A: Yes. Both components share identical diagonal screen size (12.1"), resistive technology type, and physical dimensions (length, height). These parameters determine mechanical and functional compatibility. The TP02121A-4K is the designated successor product.

Q: Are there interface differences between the two parts?

A: The TP01121A-4K specifies a 4-wire interface. The TP02121A-4K does not list interface specification in the provided data. Verify interface compatibility with the TP02121A-4K datasheet before integration.

Q: What is the significance of the product status change from Obsolete to Active?

A: Active product status indicates the TP02121A-4K is in current production and available through standard distribution channels. This ensures long-term supply availability and reduces sourcing risk compared to obsolete components.

Q: Do both parts meet the same environmental and regulatory standards?

A: Yes. Both the TP01121A-4K and TP02121A-4K are ROHS3 Compliant and classified as MSL 1 (Unlimited), indicating equivalent environmental and moisture handling requirements.

Q: What packaging differences exist between these parts?

A: The TP01121A-4K is supplied with standard packaging. The TP02121A-4K is packaged in a Box format. Verify packaging requirements for your application and supply chain processes.