NDIR08ST DIP Switch Equivalent & Substitute Parts

Part Overview

The NDIR08ST is an 8-position DIP switch manufactured by APEM Inc., designed for through-hole mounting applications requiring low-current switching at 24VDC. This SPST (Single Pole Single Throw) switch features a slide actuator with gold-plated copper alloy contacts and is rated for 25mA continuous current. The product is currently active and widely used in industrial control, telecommunications, and embedded systems where configuration settings require manual selection via DIP switch arrays.

Substitute parts become necessary when the primary manufacturer experiences supply constraints, extended lead times, or when design requirements allow for alternative contact materials or actuator configurations that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

NDIR08ST

APEM Inc.In Stock: 720NDIR08ST Datasheet

Current PartRFQ

JS0108AP4-S

NKK SwitchesIn Stock: 1534JS0108AP4-S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NDIR08ST is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST
• Number of positions: 8
• Current rating: 25mA minimum
• Voltage rating: 24VDC
• Actuator type: Slide (Standard)
• Mounting type: Through Hole
• Termination style: PC Pin
• Pitch: 0.100" (2.54mm)
• Mechanical life: 2,000 cycles minimum
• Electrical life: 2,000 cycles minimum

Allowable Variations:

• Contact material (Copper Alloy or Beryllium Copper)
• Contact finish (Gold plating)
• Actuator level (Flush/Recessed or Raised)
• Body material (PBT or Polyamide)
• Operating temperature range (within or exceeding specified limits)
• Height above board (minor dimensional variance acceptable for through-hole mounting)
• Washable feature (optional)

The JS0108AP4-S from NKK Switches meets all mandatory parameters and is classified as a direct substitute for the NDIR08ST.

Parameter Comparison

Engineering Selection Recommendations

Both the NDIR08ST and JS0108AP4-S are active products with ROHS3 compliance and unlimited moisture sensitivity ratings, making them suitable for equivalent selection in 24VDC DIP switch applications.

The NDIR08ST operates across a wider temperature range (-20°C to 85°C) compared to the JS0108AP4-S (-25°C to 70°C). For applications operating above 70°C, the NDIR08ST is the required choice. For applications within the -25°C to 70°C window, both parts are functionally equivalent.

The JS0108AP4-S features Beryllium Copper contacts versus the Copper Alloy contacts of the NDIR08ST. Both contact materials are gold-plated and rated for identical electrical parameters. The height above board differs by 0.011" (0.29mm), which is negligible for standard through-hole PCB layouts with 0.100" pitch spacing.

Selection should be based on supply availability, lead time requirements, and operating temperature specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can the JS0108AP4-S replace the NDIR08ST in all applications?

A: The JS0108AP4-S is functionally equivalent for applications operating within -25°C to 70°C. Applications requiring operation above 70°C must use the NDIR08ST due to its extended upper temperature limit of 85°C.

Q: What is the significance of the contact material difference (Copper Alloy vs. Beryllium Copper)?

A: Both materials are gold-plated and rated for identical electrical performance at 25mA and 24VDC. The contact material difference does not affect electrical compatibility or switching characteristics within the specified parameters.

Q: Are there PCB layout considerations when substituting between these parts?

A: The 0.100" (2.54mm) pitch and PC pin termination are identical. The height above board difference of 0.011" is negligible for standard through-hole mounting. No PCB layout modifications are required for substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the NDIR08ST and JS0108AP4-S are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) ratings. Both are classified under ECCN EAR99.

Q: What is the mechanical life expectancy for both parts?

A: Both parts are rated for 2,000 mechanical cycles and 2,000 electrical cycles, indicating identical durability specifications.

Q: Is the washable feature a critical difference?

A: The NDIR08ST includes a tape seal washable feature, while the JS0108AP4-S does not. For applications requiring post-assembly washing or cleaning processes, the NDIR08ST is the appropriate choice. For standard applications without washing requirements, this difference is not functionally significant.