JD7509B Keylock Switch - Equivalent & Substitute Parts

Part Overview

The JD7509B 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 panel-mount component features a flat key actuator with gold-plated copper alloy contacts and solder lug termination. 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

JD7509B

APEM Inc.In Stock: 1119JD7509B Datasheet

Current PartRFQ

LK6BNB126N3

APEM Inc.In Stock: 839LK6BNB126N3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete JD7509B keylock switch is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: DP3T (double-pole, triple-throw) topology
• Number of Positions: 3-position operation
• Switch Function: On-On-On activation pattern
• Current Rating: 4A minimum (AC or AC/DC rated)
• Voltage Rating: 125V AC minimum
• Actuator Type: Flat key mechanism
• Key Removable Positions: 1 only
• Angle of Throw: 45°
• Contact Material & Finish: Copper alloy with gold plating
• Mounting Type: Panel mount configuration
• Termination Style: Solder lug connections
• Panel Cutout Dimensions: Circular 19.00mm diameter
• Operating Temperature Range: -30°C ~ 85°C
• Electrical Life: 6,000 cycles minimum

The LK6BNB126N3 meets all these criteria while offering enhanced voltage capability (28V DC in addition to 125V AC) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The LK6BNB126N3 is the direct substitute for the obsolete JD7509B keylock switch. Both components are manufactured by APEM Inc. and maintain identical electrical and mechanical specifications across all critical parameters. The LK6BNB126N3 carries active product status, ensuring ongoing availability and supply chain continuity. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The LK6BNB126N3 provides additional DC voltage capability (28V) beyond the AC-only specification of the JD7509B, offering expanded application flexibility without compromising existing AC circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LK6BNB126N3 directly replace the JD7509B in existing applications?

A: Yes. The LK6BNB126N3 maintains identical circuit configuration (DP3T), position count (3), current rating (4A), AC voltage rating (125V), actuator type (flat key), mechanical dimensions, and termination style. Panel cutout dimensions and depth behind flange are identical, enabling direct mechanical and electrical substitution.

Q: What is the difference between the JD7509B and LK6BNB126N3?

A: The primary differences are product status and DC voltage capability. The JD7509B is obsolete; the LK6BNB126N3 is active. The LK6BNB126N3 adds 28V DC rating capability, while the JD7509B specifies AC operation only. All other electrical and mechanical parameters are equivalent.

Q: Are there packaging differences between these parts?

A: The JD7509B is supplied in standard packaging; the LK6BNB126N3 is supplied in bulk packaging. Both are suitable for solder lug termination and panel mount installation.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the JD7509B and LK6BNB126N3 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the electrical life specification for these keylock switches?

A: Both parts are rated for 6,000 electrical cycles, establishing the expected operational lifespan under specified switching conditions.

Q: Can the LK6BNB126N3 be used in DC applications?

A: Yes. The LK6BNB126N3 is rated for 4A at 28V DC, enabling use in DC circuits. The JD7509B does not specify DC capability and should be limited to AC applications at 125V.