JD7509I Keylock Switch - Equivalent & Substitute Parts

Part Overview

The JD7509I is a 3-position keylock switch manufactured by APEM Inc., rated for 4A at 125V AC with SP3T circuit configuration and panel mount installation. This component is classified as obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign applications. The switch features a flat key actuator with gold-plated copper alloy contacts and is suitable for applications requiring secure key-controlled switching in the -30°C to 85°C operating range.

Substiute Parts

JD7509I

APEM Inc.In Stock: 1018JD7509I Datasheet

Current PartRFQ

LK67NB126N3

APEM Inc.In Stock: 683LK67NB126N3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JD7509I is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: SP3T (3-pole, 3-throw) - electrical topology must remain identical
• Number of Positions: 3 positions with On-On-On switching function
• Current Rating: 4A minimum at rated voltage
• Voltage Rating: 125V AC minimum (DC capability is supplementary)
• Actuator Type: Flat key with all-position key removability
• Angle of Throw: 45° mechanical throw angle
• Contact Material & Finish: Copper alloy with gold plating for reliability
• Mounting Configuration: Panel mount with 19.00mm circular cutout and solder lug termination
• Operating Temperature: -30°C to 85°C range
• Compliance: ROHS3 compliance and REACH unaffected status

The substitute part LK67NB126N3 meets all these criteria while offering enhanced voltage capability (28V DC) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The LK67NB126N3 is a direct functional equivalent to the JD7509I with the following engineering considerations:

Compliance & Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for existing and new applications.

Product Status: The JD7509I is obsolete, while LK67NB126N3 is active. Selection of the active part ensures long-term supply chain continuity and access to manufacturer support.

Electrical Enhancement: LK67NB126N3 extends voltage capability to 28V DC while maintaining 125V AC rating and 4A current capacity. This enhancement does not compromise compatibility in AC-only applications and provides additional flexibility for mixed-voltage system designs.

Mechanical Compatibility: Identical panel cutout dimensions (19.00mm circular), depth behind flange (27.55mm), and termination style (solder lug) ensure direct mechanical and electrical substitution without circuit board or panel modifications.

Packaging Consideration: LK67NB126N3 is supplied in tray packaging, which may differ from original JD7509I packaging but does not affect functional performance or installation.

Frequently Asked Questions (FAQ)

Q: Can LK67NB126N3 directly replace JD7509I in existing applications?

A: Yes. The LK67NB126N3 meets all electrical and mechanical parameters of the JD7509I. Identical circuit configuration (SP3T), current rating (4A), AC voltage rating (125V), panel cutout dimensions, and termination style enable direct substitution without circuit modifications.

Q: What is the significance of the DC voltage rating on LK67NB126N3?

A: The LK67NB126N3 adds 28V DC capability beyond the JD7509I's AC specification. This enhancement allows the part to function in both AC and DC applications. For AC-only systems, this additional rating does not affect performance or compatibility.

Q: Are the mechanical dimensions identical between these parts?

A: Yes. Both parts feature a 19.00mm circular panel cutout, 27.55mm depth behind flange, 45° angle of throw, and solder lug termination. No mechanical modifications are required for substitution.

Q: Why is product status relevant for component selection?

A: The JD7509I is obsolete, meaning manufacturer support and supply availability are limited. The LK67NB126N3 is active, ensuring continued availability, technical support, and compliance with current manufacturing standards.

Q: Do the packaging differences affect installation or performance?

A: No. Packaging format (tray for LK67NB126N3 versus original JD7509I packaging) affects logistics and storage only. Functional and mechanical performance remain identical.

Q: Are both parts RoHS3 compliant?

A: Yes. Both JD7509I and LK67NB126N3 are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for industrial and commercial applications.