JD7509F Keylock Switch - Equivalent & Substitute Parts

Part Overview

The JD7509F is a 3-position keylock switch manufactured by APEM Inc., configured as a DP3T (double-pole, triple-throw) circuit with 4A AC rating at 125V. This component is designed for panel-mounted applications requiring key-selectable switching with removable key positions at 1 and 3. The JD7509F is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

JD7509F

APEM Inc.In Stock: 1187JD7509F Datasheet

Current PartRFQ

LK6FNB126N3

APEM Inc.In Stock: 1007LK6FNB126N3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The LK6FNB126N3 qualifies as a direct substitute for the JD7509F based on the following critical parameters:

• Circuit Configuration: Both parts are DP3T with identical 3-position, On-On-On switching function
• Current Rating: Both rated at 4A
• AC Voltage Rating: Both rated at 125V AC
• Actuator Type: Both use flat key actuation
• Key Removable Positions: Both have removable keys at positions 1 and 3
• Angle of Throw: Both feature 45° throw angle
• Contact Material and Finish: Both use copper alloy contacts with gold finish
• Mounting Configuration: Both are panel-mount with identical 19.00mm circular cutout and 27.55mm depth
• Termination: Both use solder lug termination
• Operating Temperature: Both operate across -30°C to 85°C range
• Electrical Life: Both rated at 6,000 cycles
• Compliance: Both are ROHS3 compliant with MSL 1 rating

The LK6FNB126N3 represents an active product from the same manufacturer, providing enhanced DC voltage capability (28V DC) while maintaining full AC compatibility with the obsolete JD7509F.

Parameter Comparison

Engineering Selection Recommendations

The LK6FNB126N3 is the direct substitute for the obsolete JD7509F. Both components meet identical mechanical and electrical specifications for AC applications at 125V with 4A current capacity. The LK6FNB126N3 is an active product from APEM Inc., ensuring ongoing availability and supply chain continuity.

Both parts maintain ROHS3 compliance and carry identical moisture sensitivity ratings, supporting deployment in standard industrial environments. The LK6FNB126N3 provides additional DC voltage capability (28V) beyond the JD7509F specification, offering expanded application flexibility without compromising AC performance.

Mechanical compatibility is confirmed through identical panel cutout dimensions (19.00mm circular), mounting depth (27.55mm), and termination style (solder lug), enabling direct physical replacement in existing panel assemblies.

Frequently Asked Questions (FAQ)

Q: Can the LK6FNB126N3 directly replace the JD7509F in existing applications?

A: Yes. Both components share identical DP3T circuit configuration, 4A current rating, 125V AC voltage rating, 45° throw angle, flat key actuation, and panel-mount specifications with matching cutout dimensions and solder lug termination.

Q: What is the primary difference between these two parts?

A: The JD7509F is classified as obsolete, while the LK6FNB126N3 is an active product. The LK6FNB126N3 additionally supports 28V DC operation, whereas the JD7509F specification does not include DC voltage rating.

Q: Are there packaging differences between these parts?

A: The JD7509F is supplied with standard packaging, while the LK6FNB126N3 is packaged in trays. This difference does not affect electrical or mechanical compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the JD7509F and LK6FNB126N3 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating and REACH unaffected status.

Q: What is the mechanical life specification for these switches?

A: The JD7509F does not specify mechanical life. The LK6FNB126N3 is rated for 6,000 mechanical cycles. Both are rated for 6,000 electrical cycles.

Q: Are the contact materials identical?

A: Yes. Both parts use copper alloy contacts with gold finish, ensuring equivalent electrical performance and reliability.