OP599B Equivalent & Substitute Parts

Part Overview

The OP599B is a phototransistor optical sensor operating at 890nm wavelength in a T 1 3/4 through-hole package. Manufactured by TT Electronics/Optek Technology, this component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

The OP599B serves applications requiring near-infrared photodetection with top-view orientation. Due to its obsolete status, sourcing direct replacements from active product lines is necessary for new designs and system maintenance.

Key Parameters

Parameter	Value
Wavelength	890nm
Voltage - Collector Emitter Breakdown (Max)	30 V
Current - Collector (Ic) (Max)	50 mA
Current - Dark (Id) (Max)	100 nA
Power - Max	100 mW
Mounting Type	Through Hole
Orientation	Top View
Operating Temperature	-40°C ~ 100°C
Package / Case	T 1 3/4

Substitute Part Grouping Explanation

Substitution of the OP599B is determined by matching the following critical parameters:

Wavelength: 890nm (near-infrared detection band)
Voltage rating: 30 V collector-emitter breakdown minimum
Current capacity: 50 mA collector current maximum
Dark current: 100 nA maximum
Power dissipation: 100 mW maximum
Package type: T 1 3/4 through-hole
Orientation: Top view configuration
Temperature range: -40°C to 100°C operating window

The OP599A meets all specified electrical and mechanical parameters, providing direct functional equivalence to the obsolete OP599B.

Parameter Comparison

Parameter	OP599B (Obsolete)	OP599A (Active)
Manufacturer	TT Electronics/Optek Technology	TT Electronics/Optek Technology
Product Status	Obsolete	Active
Wavelength	890nm	890nm
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V
Current - Collector (Ic) (Max)	50 mA	50 mA
Current - Dark (Id) (Max)	100 nA	100 nA
Power - Max	100 mW	100 mW
Mounting Type	Through Hole	Through Hole
Orientation	Top View	Top View
Operating Temperature	-40°C ~ 100°C	-40°C ~ 100°C
Package / Case	T 1 3/4	T 1 3/4
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The OP599A is the direct active substitute for the obsolete OP599B. Both components share identical electrical specifications, mechanical packaging, and regulatory compliance certifications. The OP599A maintains ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory requirements.

Selection of the OP599A eliminates obsolescence risk while preserving all functional and performance characteristics of the original OP599B design.

Frequently Asked Questions (FAQ)

Q: Can the OP599A directly replace the OP599B in existing designs? A: Yes. The OP599A provides identical electrical ratings, wavelength response, and physical packaging. No circuit modifications are required.

Q: Are there differences in packaging between OP599B and OP599A? A: Both components use T 1 3/4 through-hole packages with top-view orientation. Mechanical compatibility is maintained.

Q: What is the primary reason for substitution? A: The OP599B is classified as obsolete. The OP599A is the active equivalent from the same manufacturer, ensuring continued component availability.

Q: Do compliance certifications differ between these parts? A: No. Both parts maintain ROHS3 compliance and REACH unaffected status.

Q: Is the OP599A suitable for new designs? A: Yes. As an active product, the OP599A is the recommended choice for new applications requiring 890nm phototransistor functionality in T 1 3/4 packaging.

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