JD7509C Keylock Switch - Equivalent & Substitute Parts

Part Overview

The JD7509C is a 3-position keylock switch manufactured by APEM Inc., rated for 4A at 125V AC with SP3T (Single Pole, 3-Throw) circuit configuration. This component features a flat key actuator, panel mount installation, and gold-plated copper alloy contacts. The product is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

JD7509C

APEM Inc.In Stock: 1112JD7509C Datasheet

Current PartRFQ

LK6CNB126N3

APEM Inc.In Stock: 881LK6CNB126N3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JD7509C is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: SP3T (Single Pole, 3-Throw) - must match exactly
• Number of Positions: 3 positions with On-On-On function
• Current Rating: 4A minimum at rated voltage
• Voltage Rating: 125V AC minimum
• Actuator Type: Flat key mechanism
• Key Removable Positions: 3 only
• Angle of Throw: 45°
• Contact Material and Finish: Copper alloy with gold plating
• Mounting Configuration: Panel mount with 19.00mm circular cutout
• Termination: Solder lug connections
• Operating Temperature: -30°C ~ 85°C range
• Electrical Life: 6,000 cycles minimum

The LK6CNB126N3 meets all these parameters while offering extended voltage capability (28V DC in addition to 125V AC) and active product status, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The LK6CNB126N3 is the direct substitute for the obsolete JD7509C. Both components are manufactured by APEM Inc. and share identical mechanical and electrical specifications for AC operation at 125V, 4A with SP3T configuration.

The LK6CNB126N3 offers the following advantages:

• Active Product Status: Currently in production with 787 units in stock, ensuring long-term availability
• Extended Voltage Capability: Rated for 28V DC in addition to 125V AC, providing flexibility for multi-voltage applications
• Compliance: ROHS3 compliant and REACH unaffected, meeting current regulatory requirements
• Mechanical Life Data: Specified at 6,000 cycles, matching the electrical life rating

For applications requiring only 125V AC operation at 4A with 3-position keylock functionality, the LK6CNB126N3 provides direct replacement capability without design modification.

Frequently Asked Questions (FAQ)

Q: Can the LK6CNB126N3 directly replace the JD7509C in existing designs?

A: Yes. The LK6CNB126N3 maintains identical electrical ratings (4A, 125V AC), circuit configuration (SP3T), mechanical dimensions (19.00mm panel cutout, 27.55mm depth), and contact specifications (gold-plated copper alloy). Panel mount installation and solder lug termination are unchanged.

Q: What is the difference between the JD7509C and LK6CNB126N3?

A: The primary differences are product status and voltage capability. The JD7509C is obsolete; the LK6CNB126N3 is active production. The LK6CNB126N3 adds 28V DC rating capability while maintaining all 125V AC specifications. Both share identical mechanical and thermal specifications.

Q: Are there packaging differences between these parts?

A: The JD7509C is supplied in standard packaging; the LK6CNB126N3 is supplied in tray packaging. This does not affect component functionality or electrical performance.

Q: What electrical life rating should be expected?

A: Both components are rated for 6,000 electrical cycles at the specified operating conditions (4A, 125V AC).

Q: Is the LK6CNB126N3 suitable for DC applications?

A: The LK6CNB126N3 is rated for 28V DC operation at 4A. The original JD7509C does not specify DC voltage capability. For applications requiring DC switching, the LK6CNB126N3 provides this additional functionality.

Q: What is the operating temperature range for both components?

A: Both the JD7509C and LK6CNB126N3 operate across -30°C to 85°C.