OPB982N51 Equivalent & Substitute Parts

Part Overview

The OPB982N51 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 chassis mount configuration. The OPB982N51 is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. Active alternatives within the same electrical and mechanical specifications are available from the manufacturer's current product portfolio.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB982N51
Manufacturer	TT Electronics/Optek Technology
Category	Optical Sensors
Series	Photologic®
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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the OPB982N51 is determined by strict equivalence across the following critical parameters:

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

All substitute parts listed maintain identical electrical performance characteristics and mechanical form factors. Substitutes differ only in packaging designation (Bulk vs. original packaging) and product status (Active vs. Obsolete). The base product numbers (OPB932, OPB942, OPB982, OPB992) represent different optical sensor variants within the Photologic® series, with substitutes selected from variants that maintain full parameter equivalence to the OPB982N51.

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)
OPB982N51	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	924
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 maintain electrical and mechanical equivalence to the OPB982N51. The primary distinction between the OPB982N51 and its substitutes is product status: the OPB982N51 is obsolete, while all substitute parts are active products with current manufacturing support.

All substitute parts are ROHS3 compliant, whereas the OPB982N51 is RoHS non-compliant. This compliance upgrade is significant for applications subject to RoHS directives and environmental regulations.

For new designs or system replacements, selection among the substitute parts should be based on inventory availability and packaging requirements. OPB992P51Z offers the highest inventory level (69,800 pcs), followed by OPB992N55Z (20,299 pcs). OPB982P51Z and OPB982T51Z provide mid-range availability (1,937 and 1,842 pcs respectively). All substitutes are electrically and mechanically interchangeable with the OPB982N51 within the specified parameter set.

Frequently Asked Questions (FAQ)

Q: Can OPB982N51 be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain identical electrical specifications (15 mA supply current, 4.75V–5.25V supply voltage, 70ns response time) and mechanical form factors (0.125" sensing distance, through-beam sensing method, totem pole inverted output, chassis mount, module with wire leads). Direct substitution is electrically and mechanically valid.

Q: What is the difference between OPB982N51 and OPB982P51Z?

A: Both parts share the OPB982 base product number and maintain identical electrical and mechanical parameters. The primary differences are: OPB982N51 is obsolete with RoHS non-compliant status, while OPB982P51Z is an active product with ROHS3 compliance. Packaging designation differs (original vs. bulk).

Q: Why are there multiple base product numbers (OPB932, OPB942, OPB982, OPB992) among the substitutes?

A: These represent different optical sensor variants within the Photologic® series. Substitutes are selected from variants that maintain full parameter equivalence to the OPB982N51 across all critical electrical and mechanical specifications. The base product number variation does not affect functional compatibility.

Q: Are there any compliance or certification differences between substitutes?

A: All substitute parts are ROHS3 compliant and REACH unaffected. The OPB982N51 is RoHS non-compliant. For applications requiring RoHS compliance, any of the listed substitutes is appropriate. All parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications.

Q: Which substitute part has the best availability?

A: OPB992P51Z has the highest inventory level at 69,800 pcs. OPB992N55Z follows with 20,299 pcs. For applications with less stringent lead-time requirements, OPB982P51Z (1,937 pcs) and OPB982T51Z (1,842 pcs) provide adequate stock levels.

Q: Do packaging differences affect electrical performance?

A: No. Packaging designation (Bulk vs. original) affects only the physical delivery format and does not alter electrical performance, response characteristics, or operating parameters. All parts maintain identical functional specifications.

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