Panasonic PM-K44 Optical Sensor - Equivalent & Substitute Parts

Part Overview

The Panasonic PM-K44 is an optical through-beam sensor module with NPN output configuration, selectable for Dark-ON or Light-ON operation. Designed for slot-type mounting with a 0.197" (5mm) sensing distance, this component is classified as obsolete. Due to its discontinued status, identifying functionally compatible substitute parts is essential for system maintenance, redesign, and procurement planning. The PM-K44 remains in stock (2,100 units available), but long-term availability cannot be guaranteed for new production requirements.

Substiute Parts

PM-K44

Panasonic Industrial Automation SalesIn Stock: 2132PM-K44 Datasheet

Current PartRFQ

PM-K45

Panasonic Industrial Automation SalesIn Stock: 1721PM-K45 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM-K44 is determined by the following critical parameters:

• Sensing Method: Must be Through-Beam to maintain functional equivalence
• Output Configuration: NPN output is required; however, the PM-K45 provides NPN Open Collector (fixed configuration) versus the PM-K44's selectable Dark-ON/Light-ON capability
• Sensing Distance: The PM-K45 operates at 0.236" (6mm), representing a 19.8% increase from the PM-K44's 0.197" (5mm) specification
• Response Time: Both parts maintain 20µs response time capability
• Operating Temperature: Both parts support the identical -25°C ~ 55°C range
• Mounting Type: Both are Chassis Mount with Module, Wire Leads configuration
• Compliance: Both are RoHS compliant and carry identical ECCN/HTSUS classifications

The PM-K45 qualifies as a functional substitute with the following considerations: increased sensing distance, fixed NPN Open Collector output (no selectable Dark-ON/Light-ON), and active product status with higher inventory availability (1,693 units).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PM-K45

The PM-K45 is the designated substitute for the obsolete PM-K44 based on the following engineering criteria:

• Product Status: The PM-K45 is actively manufactured and supported, ensuring long-term availability and supply chain continuity
• Compliance: The PM-K45 exceeds RoHS compliance with ROHS3 certification, meeting current regulatory requirements
• Functional Compatibility: Both sensors employ through-beam detection with NPN output, identical operating temperature ranges, and equivalent mounting configurations
• Sensing Distance Variance: The 0.039" (1mm) increase in sensing distance must be evaluated against specific application requirements; this extended range may be advantageous in certain detection scenarios or require mechanical adjustment in space-constrained installations
• Output Configuration Difference: The PM-K45 provides fixed NPN Open Collector output without selectable Dark-ON/Light-ON modes; applications requiring mode selectability must implement external logic or consider alternative solutions

Inventory Consideration: The PM-K44 remains available (2,100 units in stock), providing a transition window for existing designs. The PM-K45 inventory (1,693 units) supports immediate substitution for new production.

Frequently Asked Questions (FAQ)

Q: Can the PM-K45 directly replace the PM-K44 in existing installations?

A: Direct mechanical and electrical replacement is possible for most applications. The primary differences are the increased sensing distance (0.236" vs. 0.197") and fixed NPN Open Collector output (versus selectable Dark-ON/Light-ON). Verify that your application tolerates the extended sensing range and does not require output mode selectability.

Q: What is the impact of the 0.039" (1mm) sensing distance increase?

A: The PM-K45's extended range may affect detection accuracy in applications with tight object positioning tolerances. Conversely, the increased range can improve detection reliability in applications with variable object placement. Conduct functional testing in your specific application environment.

Q: Are both sensors compatible with the same mounting hardware?

A: Both sensors are Chassis Mount modules with wire leads and slot-type configuration. Mechanical compatibility is maintained; however, verify that the increased sensing distance does not interfere with your optical path or mechanical assembly.

Q: Does the PM-K45 support Dark-ON and Light-ON modes like the PM-K44?

A: No. The PM-K45 provides fixed NPN Open Collector output without selectable modes. If your application requires mode switching, external logic circuits or alternative sensor models must be evaluated.

Q: What are the compliance advantages of the PM-K45?

A: The PM-K45 meets ROHS3 compliance, which represents an enhanced version of the RoHS standard with stricter restrictions on hazardous substances. This ensures compatibility with current and future regulatory requirements in electronics manufacturing and procurement.

Q: Is the PM-K45 actively supported by Panasonic?

A: Yes. The PM-K45 is classified as Active product status, ensuring ongoing manufacturing support, technical documentation, and supply chain availability. The PM-K44, being obsolete, has no guaranteed long-term support.