OPB992N51 Equivalent & Substitute Parts

Part Overview

The OPB992N51 is an optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This through-beam optical sensor operates at 0.125" (3.18mm) sensing distance with wire lead connections and totem pole inverted output configuration. The OPB992N51 is classified as obsolete, necessitating identification of active equivalent parts that maintain identical electrical and mechanical specifications for continued system integration and maintenance.

Key Parameters

Parameter	OPB992N51 Specification
Sensing Distance	0.125" (3.18mm)
Sensing Method	Through-Beam
Output Configuration	Totem Pole, Inverted
Mounting Type	Chassis Mount
Current - Supply	15 mA
Voltage - Supply	4.75V ~ 5.25V
Response Time	70ns
Operating Temperature	-40°C ~ 70°C
Package / Case	Module, Wire Leads
Series	Photologic®

Substitute Part Grouping Explanation

Substitute parts for the OPB992N51 are qualified based on strict equivalence across all critical electrical and mechanical parameters. The following parameters determine substitution eligibility:

Sensing Distance: 0.125" (3.18mm)
Sensing Method: Through-Beam
Output Configuration: Totem Pole, Inverted
Mounting Type: Chassis Mount
Current - Supply: 15 mA
Voltage - Supply: 4.75V ~ 5.25V
Response Time: 70ns
Operating Temperature: -40°C ~ 70°C
Package / Case: Module, Wire Leads
Series: Photologic®

All substitute parts listed maintain these specifications without deviation. Substitutes differ only in product status (active vs. obsolete) and RoHS compliance level, with active parts offering ROHS3 compliance compared to the non-compliant original part.

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensing Distance	Sensing Method	Output Configuration	Current - Supply	Voltage - Supply	Response Time	Operating Temperature	RoHS Status	Inventory (Pcs)
OPB992N51	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	RoHS non-compliant	964
OPB932W51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	1139
OPB932W55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	866
OPB942W55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	1455
OPB982P11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	837
OPB982P51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	1937
OPB982T51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	1842
OPB982T55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	830
OPB992L51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	1224
OPB992N55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	20299
OPB992P51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Totem Pole, Inverted	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	ROHS3 Compliant	69800

Engineering Selection Recommendations

All listed substitute parts provide direct functional equivalence to the OPB992N51 across electrical and mechanical specifications. The primary distinction between the original part and substitutes is product lifecycle status and regulatory compliance.

The OPB992N51 is obsolete and carries RoHS non-compliant status. All substitute parts are active production items with ROHS3 compliance, meeting current regulatory requirements for new designs and system updates.

Selection among substitute parts should be based on inventory availability and procurement lead times. OPB992P51Z offers the highest inventory level at 69,800 pieces, followed by OPB992N55Z at 20,299 pieces. All substitutes maintain identical electrical performance and thermal operating range, ensuring direct replacement capability in existing circuit implementations.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts directly replace the OPB992N51?

A: Yes. All listed substitute parts maintain identical electrical specifications (15 mA supply current, 4.75V–5.25V supply voltage, 70ns response time), mechanical configuration (0.125" sensing distance, through-beam method, totem pole inverted output, chassis mount, wire leads), and operating temperature range (-40°C to 70°C). Direct substitution is electrically and mechanically compatible.

Q: What is the difference between the OPB992N51 and the substitute parts?

A: The OPB992N51 is classified as obsolete with RoHS non-compliant status. All substitute parts are active production items with ROHS3 compliance. No electrical or mechanical differences exist between the parts.

Q: Are there differences between OPB932, OPB942, OPB982, and OPB992 base series?

A: Within the provided substitute list, all parts maintain identical specifications for sensing distance, sensing method, output configuration, supply current, supply voltage, response time, and operating temperature. Differences in base product numbers reflect manufacturing variants within the Photologic® series, but all listed parts are electrically and mechanically equivalent for the OPB992N51 application.

Q: Which substitute part should I select for new designs?

A: Selection should be based on procurement availability and lead times. OPB992P51Z and OPB992N55Z offer the highest inventory levels. All parts are ROHS3 compliant and suitable for new designs requiring current regulatory compliance.

Q: Are there any package or lead configuration differences among the substitutes?

A: No. All substitute parts use identical packaging (Module, Wire Leads) and mounting configuration (Chassis Mount). Wire lead connections and physical form factor are consistent across all listed parts.

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