OPB993L11 Equivalent & Substitute Parts

Part Overview

The OPB993L11 is an optical sensor from TT Electronics/Optek Technology's Photologic® series, designed as a through-beam sensor with 0.125" (3.18mm) sensing distance and NPN open collector output configuration. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The OPB993L11 operates within a 4.75V to 5.25V supply range with 15 mA current consumption and 70ns response time, suitable for industrial sensing applications requiring through-beam detection.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution for the OPB993L11 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 inverted), supply voltage range (4.75V ~ 5.25V), current consumption (15 mA), response time (70ns), operating temperature range (-40°C ~ 70°C), mounting type (chassis mount), and package format (module with wire leads).

All substitute parts listed maintain identical electrical and mechanical specifications to the OPB993L11. The primary distinction among substitutes is product status and RoHS compliance. The OPB993L11 is obsolete and RoHS non-compliant, while all substitute parts are active products with ROHS3 compliance. Packaging differences (bulk versus other formats) do not affect functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensing Distance	Output Configuration	Voltage - Supply	Current - Supply	Response Time	Operating Temperature	RoHS Status	Inventory (Pcs)
OPB993L11	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	RoHS non-compliant	1121
OPB993L11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	1716
OPB933W51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	3489
OPB933W55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	1243
OPB943W51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	1180
OPB983L11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	896
OPB983L51Z	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	1900
OPB983P11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	998
OPB983P51Z	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	2108
OPB983T51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	20199
OPB993L55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	ROHS3 Compliant	722

Engineering Selection Recommendations

For applications currently using the obsolete OPB993L11, direct substitution with OPB993L11Z is the primary recommendation. This part maintains identical specifications while offering active product status and ROHS3 compliance. OPB993L11Z is functionally equivalent with improved regulatory compliance for new designs and ongoing production.

Alternative substitutes from the OPB933, OPB943, and OPB983 base product families are fully compatible replacements. All substitute parts maintain the same electrical performance, sensing characteristics, and mechanical mounting requirements. Selection among alternatives may be based on inventory availability and supply chain considerations, as all parts are active products with ROHS3 compliance.

For new designs, any of the listed substitute parts are acceptable selections. Existing designs using OPB993L11 can transition to any substitute without circuit modification, provided the NPN open collector output configuration and inverted logic are accommodated in the application schematic.

Frequently Asked Questions (FAQ)

Q: Can OPB993L11Z directly replace OPB993L11 without circuit changes?

A: Yes. OPB993L11Z is functionally identical to OPB993L11 across all electrical and mechanical parameters. No circuit modifications are required for direct substitution.

Q: What is the difference between OPB993L11 and OPB993L11Z?

A: The primary differences are product status and RoHS compliance. OPB993L11 is obsolete and RoHS non-compliant. OPB993L11Z is an active product with ROHS3 compliance. All electrical and mechanical specifications are identical.

Q: Are OPB983 and OPB933 series parts compatible with OPB993L11?

A: Yes. All listed substitute parts maintain identical sensing distance, output configuration, voltage supply range, current consumption, response time, operating temperature range, and mounting type. They are fully compatible replacements.

Q: Does packaging format affect substitution compatibility?

A: No. All substitute parts use the same module with wire leads package format. Packaging designation (such as bulk) refers to order quantity and does not affect functional performance or pin compatibility.

Q: Which substitute part has the highest inventory availability?

A: OPB983T51Z has the highest inventory at 20,199 pieces, followed by OPB933W51Z at 3,489 pieces.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original OPB993L11 is RoHS non-compliant, making compliance upgrade a key benefit of substitution.

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