OPB481N11Z Equivalent & Substitute Parts

Part Overview

The OPB481N11Z is a through-beam optical sensor from the Photologic® series manufactured by TT Electronics/Optek Technology. This component features a 0.125" (3.18mm) sensing distance with NPN open collector output configuration and wire lead mounting for chassis applications. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. Active alternatives within the same product family maintain identical electrical and mechanical specifications while offering improved availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB481N11Z
Manufacturer	TT Electronics/Optek Technology
Category	Optical Sensors
Series	Photologic®
Sensing Distance	0.125" (3.18mm)
Sensing Method	Through-Beam
Output Configuration	NPN - Open Collector, Buffer
Voltage - Supply	4.5V ~ 16V
Current - Supply	7.5 mA
Response Time	50ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Chassis Mount
Package / Case	Module, Wire Leads
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the OPB481N11Z is determined by strict equivalence across the following critical parameters:

Sensing Distance: 0.125" (3.18mm)
Sensing Method: Through-Beam
Output Configuration: NPN - Open Collector, Buffer
Voltage Supply Range: 4.5V ~ 16V
Current Supply: 7.5 mA
Response Time: 50ns
Operating Temperature Range: -40°C ~ 85°C
RoHS Status: ROHS3 Compliant

All qualified substitute parts maintain identical electrical performance specifications and environmental ratings. Substitutes differ only in product status (active vs. obsolete) and mounting configuration (wire leads vs. PCB mount). The OPB471N11 represents a functional equivalent with PCB mount configuration, while OPB481T11Z, OPB481L11Z, OPB491T11Z, and OPB491L11Z maintain the original wire lead chassis mount form factor with active product status.

Parameter Comparison

Parameter	OPB481N11Z	OPB471N11	OPB481T11Z	OPB481L11Z	OPB491T11Z	OPB491L11Z
Sensing Distance	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)
Sensing Method	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam
Output Configuration	NPN - Open Collector, Buffer	NPN - Open Collector, Buffer	NPN - Open Collector, Buffer	NPN - Open Collector, Buffer	NPN - Open Collector, Buffer	NPN - Open Collector, Buffer
Voltage - Supply	4.5V ~ 16V	4.5V ~ 16V	4.5V ~ 16V	4.5V ~ 16V	4.5V ~ 16V	4.5V ~ 16V
Current - Supply	7.5 mA	7.5 mA	7.5 mA	7.5 mA	7.5 mA	7.5 mA
Response Time	50ns	50ns	50ns	50ns	50ns	50ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Chassis Mount	Through Hole	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount
Package / Case	Module, Wire Leads	PCB Mount	Module, Wire Leads	Module, Wire Leads	Module, Wire Leads	Module, Wire Leads
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For applications currently using OPB481N11Z, direct substitution is supported by OPB481T11Z and OPB481L11Z, which maintain identical electrical specifications, response characteristics, and chassis mount wire lead configuration while offering active product status and improved supply availability.

The OPB471N11 provides electrical and performance equivalence but requires PCB mount integration instead of chassis mount wire leads. This substitute is appropriate for new designs or system redesigns where PCB mounting is feasible.

The OPB491T11Z and OPB491L11Z variants maintain all electrical and mechanical specifications of the original part while offering active product status. These components are suitable for direct substitution in existing applications.

All substitute parts maintain ROHS3 compliance and identical environmental operating ranges, ensuring regulatory and thermal compatibility with the original OPB481N11Z specification.

Frequently Asked Questions (FAQ)

Q: Can OPB481T11Z and OPB481L11Z be used interchangeably with OPB481N11Z?

A: Yes. Both parts maintain identical electrical specifications, sensing distance, output configuration, supply voltage range, current draw, response time, and operating temperature range. The primary difference is product status: OPB481T11Z and OPB481L11Z are active products with improved availability, while OPB481N11Z is obsolete.

Q: What is the difference between OPB481L11Z and OPB481T11Z?

A: Both parts are electrically and mechanically identical. The designation difference reflects internal manufacturing or packaging variations within the Photologic® series. Both are active products suitable for direct substitution.

Q: Can OPB471N11 replace OPB481N11Z in existing applications?

A: OPB471N11 provides electrical equivalence but differs in mounting configuration. OPB481N11Z uses chassis mount wire leads, while OPB471N11 uses through-hole PCB mount. Substitution requires mechanical redesign of the mounting interface. OPB471N11 is appropriate for new designs or system modifications where PCB mounting is implemented.

Q: Are OPB491T11Z and OPB491L11Z suitable replacements?

A: Yes. These parts maintain all critical electrical and mechanical specifications of OPB481N11Z, including sensing distance, through-beam method, NPN open collector output, supply voltage range, current consumption, response time, and operating temperature range. Both are active products.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All substitute parts listed are ROHS3 compliant with REACH unaffected status, matching the regulatory compliance of OPB481N11Z.

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