OP603TX Equivalent & Substitute Parts

Part Overview

The OP603TX is a phototransistor optical sensor in a top view pill package, manufactured by TT Electronics/Optek Technology. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and procurement needs. The OP603TX serves applications requiring photoelectric detection with surface mount integration and operates across an extended temperature range of -55°C to 125°C.

Substiute Parts

OP603TX

TT Electronics/Optek TechnologyIn Stock: 881OP603TX Datasheet

Current PartRFQ

OP604TXV

TT Electronics/Optek TechnologyIn Stock: 852OP604TXV Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP603TX is determined by strict equivalence across the following critical parameters:

• Optical sensor category and phototransistor function
• Surface mount packaging with top view pill configuration
• Collector-emitter breakdown voltage of 50 V
• Dark current specification of 25 nA maximum
• Viewing angle of 36°
• Maximum power dissipation of 50 mW
• Operating temperature range of -55°C to 125°C

The OP604TXV qualifies as a manufacturer-recommended substitute based on identical electrical ratings, mechanical compatibility, and functional equivalence within the specified parameter set. The OP604TXV maintains all critical performance characteristics while offering improved product status and enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The OP604TXV is the direct substitute for the obsolete OP603TX. Both components share identical electrical specifications, mechanical packaging, and thermal operating parameters. The OP604TXV offers the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance satisfies modern regulatory requirements, whereas the OP603TX is RoHS non-compliant
• Maximum collector current of 8 mA exceeds the OP603TX specification of 5 mA, providing additional design margin
• Identical dark current, viewing angle, power rating, and temperature range ensure functional equivalence

Selection of the OP604TXV eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the OP604TXV directly replace the OP603TX in existing designs?

A: Yes. The OP604TXV maintains identical electrical ratings for collector-emitter breakdown voltage, dark current, viewing angle, power dissipation, and operating temperature range. The pill package configuration and surface mount orientation are identical. The increased maximum collector current of 8 mA versus 5 mA provides additional performance margin without affecting compatibility.

Q: What is the primary reason for substitution?

A: The OP603TX is classified as obsolete. The OP604TXV is an active product from the same manufacturer with equivalent specifications, ensuring continued availability and supply chain reliability.

Q: Are there compliance differences between these parts?

A: Yes. The OP603TX is RoHS non-compliant, while the OP604TXV is ROHS3 compliant. This distinction is significant for applications subject to regulatory requirements or customer specifications mandating RoHS compliance.

Q: Are the packages identical?

A: Yes. Both components use the pill package with top view orientation and surface mount mounting type. No PCB layout modifications are required for substitution.

Q: What parameters determine substitution eligibility?

A: Substitution is based on equivalence across optical sensor category, phototransistor function, collector-emitter breakdown voltage, dark current specification, viewing angle, power rating, operating temperature range, and mechanical packaging. The OP604TXV meets all these criteria.