PM-Y44 Optical Sensor Equivalent & Substitute Parts

Part Overview

The PM-Y44 is an optical through-beam sensor manufactured by Panasonic Industrial Automation Sales, designed for slot-type applications with NPN output configuration and selectable Dark-ON/Light-ON operation. This sensor features a 0.197" (5mm) sensing distance and is classified as an unamplified module with wire leads for direct integration into control systems.

The PM-Y44 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality, ensure supply chain continuity, and support ongoing maintenance and replacement requirements for installed equipment.

Substiute Parts

PM-Y44

Panasonic Industrial Automation SalesIn Stock: 734PM-Y44 Datasheet

Current PartRFQ

PM-Y45

Panasonic Industrial Automation SalesIn Stock: 1623PM-Y45 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PM-Y44 is evaluated based on the following critical parameters that define functional compatibility:

Sensing Method & Distance: Both the main part and substitute must operate as through-beam sensors. The PM-Y45 operates at 0.236" (6mm), representing a minor increase in sensing distance that remains within typical application tolerances for slot-type optical sensing.

Output Configuration & Electrical Characteristics: The PM-Y44 provides NPN output with selectable Dark-ON/Light-ON operation. The PM-Y45 provides NPN Open Collector output, which is electrically compatible with NPN-based control circuits. Both sensors maintain response times of 20µs, ensuring equivalent switching performance.

Mounting & Package: Both sensors are chassis-mount modules with wire leads, maintaining mechanical compatibility in slot-type installations.

Compliance & Availability: The PM-Y44 is obsolete with limited remaining inventory (679 pcs). The PM-Y45 is active product status with significantly higher availability (1595 pcs), ensuring long-term supply chain viability.

Parameter Comparison

Engineering Selection Recommendations

PM-Y45 as Primary Substitute: The PM-Y45 is the designated substitute for the PM-Y44 based on equivalent through-beam sensing methodology, compatible NPN output architecture, and matching response time performance at 20µs. The PM-Y45 maintains active product status with ROHS3 compliance, ensuring regulatory alignment and supply chain continuity.

Sensing Distance Consideration: The PM-Y45 operates at 0.236" (6mm) versus the PM-Y44 at 0.197" (5mm). This 0.039" (1mm) increase in sensing distance is within standard tolerance ranges for slot-type optical sensor applications and does not introduce functional incompatibility.

Electrical Compatibility: Both sensors employ NPN output configuration suitable for standard industrial control circuits. The PM-Y45 specifies 5V ~ 24V supply voltage range, covering typical industrial power supply standards.

Compliance Status: The PM-Y45 holds ROHS3 compliance, exceeding the RoHS compliance of the PM-Y44, ensuring compatibility with current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the PM-Y45 directly replace the PM-Y44 in existing installations?

A: Yes. Both sensors are through-beam optical modules with NPN output, chassis-mount configuration, and wire leads. The 1mm increase in sensing distance does not prevent direct mechanical and electrical substitution in slot-type applications.

Q: What is the significance of the sensing distance difference between PM-Y44 (5mm) and PM-Y45 (6mm)?

A: The PM-Y45 provides slightly extended sensing range. This difference is negligible for most slot-type optical sensing applications and does not compromise compatibility with existing mechanical assemblies or control logic.

Q: Are there differences in output behavior between the PM-Y44 and PM-Y45?

A: The PM-Y44 offers selectable Dark-ON/Light-ON operation, while the PM-Y45 provides NPN Open Collector output. Both configurations are compatible with standard industrial control circuits. Application-specific requirements for selectable output modes should be evaluated against control system design.

Q: Why is the PM-Y45 recommended over the PM-Y44?

A: The PM-Y44 is obsolete with limited inventory (679 pcs). The PM-Y45 is active product with higher availability (1595 pcs), ensuring long-term supply chain support and regulatory compliance through ROHS3 certification.

Q: Are the response times equivalent?

A: The PM-Y44 specifies 20µs response time. The PM-Y45 offers dual response time options (20µs, 80µs), with 20µs matching the PM-Y44 performance. Selection of 20µs response mode ensures equivalent switching speed.

Q: What packaging differences exist between these sensors?

A: Both sensors use Module, Wire Leads configuration with chassis-mount design. The PM-Y44 specifies slot-type packaging, while the PM-Y45 packaging is listed as bulk. Both are compatible with slot-type mechanical installations.