OP593C Equivalent & Substitute Parts

Part Overview

The OP593C is a 890nm phototransistor optical sensor manufactured by TT Electronics/Optek Technology in a TO-18-2 package with top view orientation. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and production continuity. The OP593C maintains electrical and optical specifications suitable for infrared sensing applications requiring 890nm wavelength detection.

Key Parameters

Parameter	OP593C Specification
Manufacturer Part Number	OP593C
Manufacturer	TT Electronics/Optek Technology
Category	Optical Sensors
Wavelength	890nm
Voltage - Collector Emitter Breakdown (Max)	30 V
Current - Collector (Ic) (Max)	50 mA
Current - Dark (Id) (Max)	100 nA
Power - Max	250 mW
Operating Temperature Range	-40°C to 100°C
Mounting Type	Through Hole
Orientation	Top View
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the OP593C is determined by matching the following critical parameters:

Wavelength: 890nm infrared detection capability
Electrical Performance: Collector-emitter breakdown voltage of 30 V, maximum collector current of 50 mA, dark current maximum of 100 nA
Power Dissipation: 250 mW maximum rating
Operating Temperature: -40°C to 100°C range
Mounting Configuration: Through hole mounting with top view orientation
Compliance: ROHS3 compliance and REACH unaffected status

The OP593B qualifies as a direct substitute, maintaining identical electrical specifications, wavelength, power rating, and temperature range. The primary difference is packaging configuration: the OP593B uses radial package geometry versus the OP593C's TO-18-2 package, with both supporting through-hole mounting and top view orientation.

Parameter Comparison

Parameter	OP593C	OP593B (Substitute)	Match Status
Wavelength	890nm	890nm	Identical
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	Identical
Current - Collector (Ic) (Max)	50 mA	50 mA	Identical
Current - Dark (Id) (Max)	100 nA	100 nA	Identical
Power - Max	250 mW	250 mW	Identical
Operating Temperature Range	-40°C to 100°C	-40°C to 100°C	Identical
Mounting Type	Through Hole	Through Hole	Identical
Orientation	Top View	Top View	Identical
Package / Case	TO-18-2	Radial	Different
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical

Engineering Selection Recommendations

The OP593B is the manufacturer-recommended substitute for the obsolete OP593C. Both components share identical electrical performance specifications, optical wavelength, power dissipation limits, and temperature operating range. The OP593B maintains active product status with ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment and supply chain continuity.

The primary design consideration is package geometry: the OP593B employs radial lead configuration in contrast to the OP593C's TO-18-2 package. Both support through-hole mounting with top view orientation, requiring PCB layout modification to accommodate the different lead geometry. The OP593B's active status and higher inventory availability (9605 units) support production requirements without supply constraints.

Frequently Asked Questions (FAQ)

Q: Can the OP593B directly replace the OP593C without circuit modification?

A: The OP593B provides electrical and optical equivalence to the OP593C. PCB layout modification is required due to different package geometries: TO-18-2 versus radial configuration. Both components maintain identical electrical performance and mounting type (through hole, top view).

Q: What is the primary reason for substituting the OP593C?

A: The OP593C is classified as obsolete. The OP593B is the active equivalent from the same manufacturer, providing identical specifications with ongoing supply availability.

Q: Are there compliance differences between the OP593C and OP593B?

A: Both components are ROHS3 compliant and REACH unaffected. Compliance status is equivalent.

Q: How do the package differences affect circuit design?

A: The OP593C uses TO-18-2 package with specific lead positioning, while the OP593B uses radial package configuration. PCB footprint design must accommodate the radial lead geometry. Electrical performance and mounting type remain identical.

Q: Is the OP593B suitable for the same operating temperature range?

A: Yes. Both components operate across -40°C to 100°C temperature range with identical specifications.

Q: What inventory status should influence component selection?

A: The OP593B maintains active product status with 9605 units in stock, supporting production continuity. The OP593C is obsolete with limited remaining inventory (765 units).

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