Panasonic PM-R44 Optical Sensor - Equivalent & Substitute Parts

Part Overview

The Panasonic PM-R44 is an optical through-beam sensor module with NPN output configuration and selectable Dark-ON/Light-ON operation. Designed for slot-type mounting with 0.197" (5mm) sensing distance, this component operates across industrial temperature ranges and provides 20µs response time. The PM-R44 is classified as obsolete, making identification of functionally equivalent substitute parts essential for system maintenance, redesign, and procurement planning.

Substiute Parts

PM-R44

Panasonic Industrial Automation SalesIn Stock: 889PM-R44 Datasheet

Current PartRFQ

PM-R45

Panasonic Industrial Automation SalesIn Stock: 958PM-R45 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PM-R44 is determined by the following critical parameters:

• Sensing Method: Through-beam optical detection
• Mounting Configuration: Chassis mount, slot-type module with wire leads
• Output Type: NPN transistor output
• Sensing Distance: Optical gap distance (0.197" / 5mm nominal)
• Response Time: Maximum 20µs switching speed
• Operating Temperature Range: -25°C to 55°C
• Electrical Ratings: Collector current ≤15 mA, collector-emitter breakdown voltage ≥30 V
• Compliance: RoHS compliance and MSL rating

The PM-R45 qualifies as a functional substitute based on matching sensing method (through-beam), mounting type (chassis mount, module with wire leads), output configuration (NPN open collector), response time (20µs available), operating temperature range, and regulatory compliance. The primary difference is increased sensing distance (0.236" / 6mm versus 5mm), which represents a design enhancement rather than a functional incompatibility for most applications.

Parameter Comparison

Engineering Selection Recommendations

The PM-R45 is the designated substitute for the obsolete PM-R44 based on the following engineering criteria:

Product Status Alignment: The PM-R45 maintains active product status with Panasonic Industrial Automation Sales, ensuring ongoing availability, technical support, and supply chain continuity compared to the obsolete PM-R44.

Regulatory Compliance: Both parts meet RoHS requirements. The PM-R45 carries ROHS3 compliance, representing current regulatory standards. Both components maintain MSL 1 (Unlimited) moisture sensitivity rating, suitable for standard industrial storage and handling.

Functional Equivalence: Core sensing parameters align across both parts—through-beam detection method, NPN output topology, 20µs response time capability, identical operating temperature range (-25°C to 55°C), and chassis mount configuration with wire leads. These parameters ensure electrical and mechanical compatibility in existing circuit designs.

Sensing Distance Consideration: The PM-R45 provides 0.236" (6mm) sensing distance versus the PM-R44's 0.197" (5mm). This represents a 1mm increase in optical gap tolerance, which enhances detection reliability in applications with minor mechanical variation or optical path degradation.

Output Configuration: The PM-R44 offers selectable Dark-ON/Light-ON operation, while the PM-R45 specifies NPN open collector output. Verification of application-specific output requirements is necessary to confirm compatibility with existing signal conditioning circuits.

Frequently Asked Questions (FAQ)

Q: Can the PM-R45 directly replace the PM-R44 in existing designs?

A: The PM-R45 provides functional equivalence for through-beam optical sensing applications. Both parts share identical sensing method, NPN output topology, response time (20µs), operating temperature range, and mounting configuration. The primary design difference is increased sensing distance (6mm versus 5mm). Mechanical slot alignment and electrical signal conditioning circuits must be verified for compatibility.

Q: What is the significance of the sensing distance difference between PM-R44 and PM-R45?

A: The PM-R44 operates at 0.197" (5mm) sensing distance, while the PM-R45 operates at 0.236" (6mm). This 1mm difference affects the optical gap tolerance between emitter and receiver. The PM-R45's increased distance provides greater tolerance for mechanical misalignment or optical path obstruction. Applications requiring precise 5mm gap operation may require mechanical redesign to accommodate the 6mm specification.

Q: Why is the PM-R44 classified as obsolete?

A: The PM-R44 is no longer in active production. The PM-R45 represents the current-generation equivalent within the Panasonic PM series optical sensor portfolio. Obsolete status indicates that new inventory procurement from the manufacturer is not available; however, existing stock may remain available through authorized distributors.

Q: Are there electrical compatibility concerns between PM-R44 and PM-R45?

A: Both parts operate with NPN output configuration and identical collector current maximum rating (15 mA). Operating voltage ranges and response time specifications align. The PM-R44 offers selectable Dark-ON/Light-ON operation, while the PM-R45 specifies open collector output. Circuit designs must accommodate the output configuration difference to ensure proper signal detection and logic interface.

Q: What packaging and mounting considerations apply to substitution?

A: Both the PM-R44 and PM-R45 are supplied as modules with wire leads in slot-type chassis mount configuration. Physical dimensions and connector specifications must be verified against mechanical drawings to confirm fit within existing mounting structures. Wire lead gauge and connector compatibility should be confirmed before final assembly.

Q: Does the PM-R45 meet current regulatory requirements?

A: Yes. The PM-R45 carries ROHS3 compliance, representing current European Union Restriction of Hazardous Substances regulations. Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating, suitable for standard industrial storage conditions without desiccant requirements.