NDIR04ST Equivalent & Substitute Parts

Part Overview

The NDIR04ST is a 4-position DIP slide switch manufactured by APEM Inc., designed for through-hole PCB mounting applications requiring low-current switching at 24VDC. This SPST (Single Pole Single Throw) switch is rated for 25mA continuous current with a flush, recessed actuator and gold-plated copper alloy contacts. The component is Active in product status and fully RoHS3 compliant. Equivalent parts are identified when applications require alternative packaging formats, different actuator profiles, or sourcing from alternative manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

NDIR04ST

APEM Inc.In Stock: 838NDIR04ST Datasheet

Current PartRFQ

JS0104AP4

NKK SwitchesIn Stock: 1007JS0104AP4 Datasheet

SimilarRFQ

JS0104AP4-S

NKK SwitchesIn Stock: 1173JS0104AP4-S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the NDIR04ST are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Electrical Parameters: Circuit configuration (SPST), number of positions (4), current rating (25mA), and voltage rating (24VDC) must be identical.
• Mechanical Parameters: Mounting type (through hole), pitch (0.100"/2.54mm), termination style (PC pin), and overall length (0.437"/11.10mm) must match.
• Contact Specifications: Gold finish is maintained across all qualified substitutes.
• Lifecycle Ratings: Mechanical and electrical life ratings of 2,000 cycles are consistent.
• Compliance: All substitutes maintain RoHS3 compliance and MSL Level 1 rating.

Variations in packaging format (tube vs. bulk), actuator profile (flush/recessed vs. raised), contact material composition, body material, and operating temperature range do not preclude substitution when the above critical parameters align. These secondary parameters may influence selection based on specific application constraints but do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three parts—NDIR04ST, JS0104AP4, and JS0104AP4-S—share identical electrical specifications (SPST, 4-position, 25mA, 24VDC) and mechanical compatibility (through-hole mounting, 0.100" pitch, PC pin termination). All are Active products with RoHS3 compliance and MSL Level 1 ratings.

Selection between these parts should be based on:

• Packaging Requirements: NDIR04ST and JS0104AP4-S are supplied in tube packaging; JS0104AP4 is supplied in bulk. Choose based on procurement and assembly workflow.
• Actuator Profile: NDIR04ST features a flush, recessed actuator; JS0104AP4 and JS0104AP4-S feature raised actuators. PCB layout and enclosure clearance constraints may dictate this choice.
• Operating Temperature Range: NDIR04ST operates from -20°C to 85°C; NKK substitutes operate from -25°C to 70°C. Applications requiring extended high-temperature operation favor NDIR04ST.
• Inventory Availability: Current stock levels are 824 pcs (NDIR04ST), 938 pcs (JS0104AP4), and 1,162 pcs (JS0104AP4-S).

Frequently Asked Questions (FAQ)

Q: Can JS0104AP4 or JS0104AP4-S be used as direct replacements for NDIR04ST?

A: Yes. Both NKK switches meet all critical electrical and mechanical parameters: SPST circuit, 4 positions, 25mA current rating, 24VDC voltage rating, through-hole mounting, 0.100" pitch, and PC pin termination. Functional compatibility is established.

Q: What is the difference between JS0104AP4 and JS0104AP4-S?

A: The primary difference is packaging. JS0104AP4 is supplied in bulk; JS0104AP4-S is supplied in tube. Electrical and mechanical specifications are identical. The "-S" suffix indicates tube packaging.

Q: Does the difference in actuator profile (flush vs. raised) affect electrical performance?

A: No. Actuator profile is a mechanical characteristic that affects physical clearance and user interface feel, not electrical switching performance. Both profiles maintain identical SPST switching behavior and current/voltage ratings.

Q: Are there temperature range limitations when substituting?

A: NDIR04ST operates from -20°C to 85°C; JS0104AP4 and JS0104AP4-S operate from -25°C to 70°C. For applications requiring operation above 70°C, NDIR04ST is the appropriate choice. For applications within -25°C to 70°C, all three are equivalent.

Q: Do contact material differences (copper alloy vs. beryllium copper) affect compatibility?

A: No. Both contact materials are gold-plated and rated for identical electrical specifications (25mA, 24VDC). Contact material composition does not affect switching performance within the specified electrical parameters.

Q: Are all three parts RoHS3 compliant?

A: Yes. NDIR04ST, JS0104AP4, and JS0104AP4-S are all RoHS3 compliant with MSL Level 1 ratings and REACH Unaffected status.