OP750C Equivalent & Substitute Parts Reference

Part Overview

The OP750C is a phototransistor optical sensor operating at 935nm wavelength with side view radial orientation, designed for through-hole mounting applications. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement continuity. The OP750B serves as the direct manufacturer-recommended substitute, offering identical electrical and optical specifications while maintaining active product status.

Substiute Parts

OP750C

TT Electronics/Optek TechnologyIn Stock: 765OP750C Datasheet

Current PartRFQ

OP750B

TT Electronics/Optek TechnologyIn Stock: 1187OP750B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP750C is determined by strict equivalence across the following critical parameters:

• Wavelength: 935nm (infrared detection band)
• Voltage rating: 30 V collector-emitter breakdown maximum
• Current specifications: 30 mA maximum collector current, 100 nA maximum dark current
• Power dissipation: 200 mW maximum
• Mounting configuration: Through-hole radial package
• Orientation: Side view optical axis alignment
• Operating temperature range: -40°C to 100°C

The OP750B meets all these criteria and is designated as the manufacturer-recommended equivalent. Both parts are manufactured by TT Electronics/Optek Technology and share identical base product lineage (OP750 series).

Parameter Comparison

Engineering Selection Recommendations

The OP750B is the direct equivalent for OP750C applications. Selection is based on the following factors:

Compliance and Regulatory Status: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in new designs and manufacturing environments.

Product Lifecycle: The OP750B carries active product status, providing assured long-term availability and supply chain stability compared to the obsolete OP750C.

Electrical and Optical Equivalence: All critical performance parameters—wavelength, voltage ratings, current specifications, power dissipation, and temperature range—are identical between the two parts, enabling direct functional substitution without circuit redesign.

Packaging and Mechanical Compatibility: Both parts utilize identical through-hole radial packaging with side view orientation, ensuring PCB layout and mechanical assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can OP750B directly replace OP750C in existing designs?

A: Yes. The OP750B is electrically and mechanically equivalent to the OP750C across all specified parameters. No circuit modifications or PCB layout changes are required for substitution.

Q: What is the primary reason for substituting OP750C?

A: The OP750C is classified as obsolete. The OP750B, as the active equivalent, provides assured procurement and supply chain continuity.

Q: Are there differences in packaging between OP750C and OP750B?

A: Both parts use radial through-hole packages with side view orientation. The OP750B is supplied in bulk packaging, while the OP750C packaging type was not specified in available data.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both OP750C and OP750B are ROHS3 compliant and REACH unaffected, meeting identical environmental and regulatory standards.

Q: What are the critical parameters for substitution in 935nm phototransistor applications?

A: Wavelength (935nm), collector-emitter voltage rating (30 V), maximum collector current (30 mA), dark current specification (100 nA), power dissipation (200 mW), and operating temperature range (-40°C to 100°C) must remain constant for functional equivalence.

Q: Is the OP750B available in inventory?

A: Yes. The OP750B has 1096 pieces in new original stock, providing immediate procurement availability.