Panasonic PM-T54 Optical Sensor Equivalent & Substitute Parts

Part Overview

The Panasonic PM-T54 is an optical through-beam sensor module with NPN output configuration and selectable Dark-ON/Light-ON operation. This unamplified sensor features a 0.197" (5mm) sensing distance and is designed for slot-type chassis mounting with wire leads. The product is currently obsolete, making identification of compatible substitute components essential for system maintenance, repair, and redesign applications.

Substiute Parts

PM-T54

Panasonic Industrial Automation SalesIn Stock: 78792PM-T54 Datasheet

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PM-T45

Panasonic Industrial Automation SalesIn Stock: 1408PM-T45 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PM-T54 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Sensing method: Through-beam optical detection
• Output type: NPN configuration
• Mounting interface: Chassis mount with wire leads
• Response time: 20µs or faster
• Operating temperature range: Minimum -25°C ~ 55°C coverage
• Electrical ratings: Collector current ≥15 mA, collector-emitter breakdown voltage ≥30 V

Allowable Variations:

• Sensing distance may differ (5mm vs. 6mm) based on application requirements
• Output configuration may vary from selectable Dark-ON/Light-ON to fixed NPN Open Collector
• Supply voltage specifications may differ if the substitute operates within compatible electrical parameters
• Response time may be equal or faster than the original specification

The PM-T45 qualifies as a substitute based on matching through-beam sensing method, NPN output, chassis mount configuration, compatible response time, and overlapping operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

PM-T45 as Primary Substitute:

The PM-T45 is an active product with current manufacturing status and ROHS3 compliance, making it suitable for new designs and ongoing production requirements. Both parts share identical through-beam sensing methodology, NPN output architecture, chassis mount configuration, and operating temperature specifications. The PM-T45 maintains the 20µs response time option, ensuring temporal performance compatibility.

Key Considerations:

The PM-T45 operates at a 0.236" (6mm) sensing distance compared to the PM-T54's 0.197" (5mm), representing a 1mm increase in detection range. This difference must be evaluated against specific application geometry and object detection requirements. The PM-T45 features fixed NPN Open Collector output rather than the PM-T54's selectable Dark-ON/Light-ON configuration, requiring circuit-level verification of signal polarity compatibility.

Both components maintain MSL Level 1 (Unlimited) moisture sensitivity and share identical ECCN and HTSUS classifications, supporting regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the PM-T45 directly replace the PM-T54 in existing assemblies?

A: Direct mechanical and electrical substitution is possible if the application tolerates the increased 6mm sensing distance and fixed NPN Open Collector output configuration. Physical slot-type mounting interfaces are compatible. Circuit-level signal polarity must be verified before implementation.

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

A: The PM-T54 provides selectable Dark-ON/Light-ON output at 5mm sensing distance, while the PM-T45 offers fixed NPN Open Collector output at 6mm sensing distance. Both maintain identical response time (20µs option) and operating temperature range.

Q: Are there any compliance or regulatory differences?

A: The PM-T54 carries RoHS Compliant status, while the PM-T45 carries ROHS3 Compliant status. Both share identical ECCN (EAR99) and HTSUS (8543.70.9860) classifications. The PM-T45's ROHS3 compliance reflects current regulatory standards.

Q: What should be verified before substitution?

A: Verify that the application can accommodate the 1mm increase in sensing distance (5mm to 6mm). Confirm that fixed NPN Open Collector output is compatible with existing signal processing circuits. Validate that the 20µs response time meets system timing requirements.

Q: Is the PM-T45 suitable for new product designs?

A: Yes. The PM-T45 is an active product with current manufacturing status and ROHS3 compliance, making it appropriate for new designs requiring through-beam optical sensing with NPN output and chassis mount configuration.