KAJ09LGGT DIP Switch Equivalent & Substitute Parts

Part Overview

The KAJ09LGGT is a 9-position surface mount DIP switch manufactured by E-Switch, designed for SPST (Single Pole Single Throw) switching applications at 24VDC with a 25mA current rating. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The KAJ09LGGT features a slide actuator with gold-plated copper alloy contacts and is suitable for applications requiring low-current switching in industrial and commercial equipment.

Substiute Parts

KAJ09LGGT

E-SwitchIn Stock: 841KAJ09LGGT Datasheet

Current PartRFQ

SD09H0SB

C&KIn Stock: 1148SD09H0SB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KAJ09LGGT is determined by the following critical parameters that must remain compatible:

Mandatory Compatibility Parameters:

• Circuit configuration: SPST (single pole, single throw)
• Number of positions: 9
• Mounting type: Surface mount
• Termination style: Gull wing
• Pitch: 0.100" (2.54mm)
• Operating temperature range: -40°C ~ 85°C minimum
• RoHS3 compliance status

Allowable Parameter Variations:

• Current rating: Substitute must equal or exceed 25mA
• Voltage rating: Substitute must equal or exceed 24VDC
• Actuator level: May differ (raised vs. flush/recessed)
• Contact material and finish: May differ while maintaining electrical performance
• Body material: May differ while maintaining mechanical integrity
• Height above board: Minor variations acceptable within PCB assembly constraints

The SD09H0SB from C&K meets all mandatory compatibility requirements and exceeds the electrical performance specifications of the KAJ09LGGT.

Parameter Comparison

Engineering Selection Recommendations

The SD09H0SB is a direct functional substitute for the KAJ09LGGT. Both components maintain ROHS3 compliance and identical operating temperature specifications. The SD09H0SB offers superior electrical performance with 100mA current rating and 25VDC voltage rating, exceeding the KAJ09LGGT specifications of 25mA and 24VDC respectively. The SD09H0SB is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete KAJ09LGGT.

The 0.007" (0.18mm) increase in height above board for the SD09H0SB is within typical PCB assembly tolerances and does not present mechanical compatibility issues for standard surface mount applications. The SD09H0SB includes tape seal features and washable construction, providing additional process flexibility for manufacturing environments requiring cleaning operations.

Frequently Asked Questions (FAQ)

Q: Can the SD09H0SB directly replace the KAJ09LGGT without PCB modifications?

A: Yes. Both components share identical pitch (0.100"), gull wing termination, and surface mount footprint. The 0.007" height difference is within standard PCB assembly clearance specifications and does not require design changes.

Q: Are there electrical performance differences between these parts?

A: The SD09H0SB exceeds the KAJ09LGGT in current and voltage ratings. The KAJ09LGGT is rated 25mA at 24VDC, while the SD09H0SB is rated 100mA at 25VDC. Both are suitable for applications within the KAJ09LGGT's original specifications.

Q: What is the significance of the actuator level difference (raised vs. flush/recessed)?

A: Actuator level affects user interface feel and accessibility. The KAJ09LGGT features a raised actuator, while the SD09H0SB has a flush, recessed design. Both are functionally equivalent for automated or semi-automated switching applications. Manual actuation feel may differ slightly.

Q: Does the SD09H0SB meet the same compliance requirements?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Compliance certifications are equivalent.

Q: Why is the KAJ09LGGT obsolete?

A: The KAJ09LGGT is no longer manufactured by E-Switch. The SD09H0SB from C&K provides equivalent functionality with active production status and improved availability.

Q: Are there packaging differences?

A: The KAJ09LGGT is supplied in standard packaging, while the SD09H0SB is supplied in tube packaging with tape seal features. Tube packaging is standard for high-volume production environments.