KAJ04THGR Equivalent & Substitute Parts

Part Overview

The KAJ04THGR is a 4-position DIP slide switch manufactured by E-Switch, rated for 25mA at 24VDC with through-hole mounting. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and mechanical compatibility. Substitute parts must preserve the electrical specifications, mounting characteristics, and physical form factor to ensure direct replacement capability in existing designs.

Substiute Parts

KAJ04THGR

E-SwitchIn Stock: 917KAJ04THGR Datasheet

Current PartRFQ

NDIR04H

APEM Inc.In Stock: 710NDIR04H Datasheet

MFR RecommendedRFQ

NDIR04HT

APEM Inc.In Stock: 1198NDIR04HT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KAJ04THGR is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPST)
• Number of positions (4)
• Current and voltage ratings (25mA, 24VDC)
• Actuator type and actuation method (Slide, Standard)
• Mounting technology (Through Hole)
• Pitch spacing (0.100" / 2.54mm)
• Termination style (PC Pin)
• Contact material and finish (Copper Alloy, Gold)
• Mechanical and electrical life ratings (2,000 Cycles each)

The NDIR04H and NDIR04HT from APEM Inc. satisfy all mandatory electrical and mechanical compatibility criteria. Both parts are active products with current manufacturing status, ensuring long-term availability and supply chain stability compared to the obsolete KAJ04THGR.

Parameter Comparison

Engineering Selection Recommendations

Both NDIR04H and NDIR04HT are functionally equivalent to the KAJ04THGR across all critical electrical and mechanical parameters. Selection between the two APEM alternatives depends on specific application requirements:

NDIR04HT is the preferred substitute when tape seal functionality is required, matching the original KAJ04THGR feature set and washability specification. This variant maintains full compatibility with applications requiring sealed component packaging.

NDIR04H serves as an alternative when tape seal is not a design requirement, offering the same electrical performance and mechanical compatibility at potentially different cost or lead time.

Both substitutes are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements. The operating temperature range of -20°C to 85°C for APEM parts is narrower than the original -40°C to 85°C specification; applications requiring operation below -20°C must retain the original KAJ04THGR or identify alternative solutions.

Physical dimensions show minor variations: APEM parts are slightly taller (0.173" vs. 0.142") and longer (0.437" vs. 0.400"). PCB layout and enclosure clearances must be verified to accommodate these dimensional differences.

Frequently Asked Questions (FAQ)

Q: Can NDIR04H and NDIR04HT be used interchangeably with KAJ04THGR?

A: Both APEM parts are electrically and mechanically equivalent to the KAJ04THGR. NDIR04HT includes tape seal and washability features matching the original. NDIR04H omits these features. Selection depends on application-specific requirements for sealing and washability.

Q: What is the impact of the lower operating temperature range (-20°C vs. -40°C)?

A: APEM substitutes operate from -20°C to 85°C, compared to the original -40°C to 85°C range. Applications requiring operation below -20°C cannot use these substitutes without design modification or alternative component selection.

Q: Are the dimensional differences between KAJ04THGR and NDIR04H/NDIR04HT significant?

A: Height above board increases from 0.142" to 0.173", and length increases from 0.400" to 0.437". These differences must be evaluated against PCB layout constraints, enclosure clearances, and mechanical assembly requirements. Prototype validation is necessary if space margins are tight.

Q: Do both APEM substitutes meet current regulatory compliance?

A: Yes. Both NDIR04H and NDIR04HT are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the difference between NDIR04H and NDIR04HT packaging?

A: NDIR04H is supplied in tube packaging without tape seal. NDIR04HT is supplied in tube packaging with tape seal. Both use identical electrical and mechanical specifications.