OPB704W Equivalent & Substitute Parts

Part Overview

The OPB704W is a reflective optical sensor manufactured by onsemi, designed as a slotted transmission switch with infrared sensing capability. This component features a 0.200" (5.08mm) sensing distance and operates as a phototransistor output device in a pre-wired module configuration for chassis mounting applications.

The OPB704W is classified as obsolete. Identifying equivalent substitute parts is essential for maintaining system functionality in applications where original inventory is depleted or procurement becomes unavailable.

Substiute Parts

OPB704W

onsemiIn Stock: 810OPB704W Datasheet

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OPB704

TT Electronics / Optek TechnologyIn Stock: 1755OPB704 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPB704W are identified based on electrical and mechanical compatibility within the optical sensor category. The critical parameters determining substitution eligibility are:

• Sensing method (reflective operation)
• Output type (phototransistor)
• Electrical ratings (voltage and current specifications)
• Sensing distance capability
• Operating temperature range
• Environmental compliance certifications

The OPB704 (manufactured by TT Electronics / Optek Technology) shares the same base product designation and maintains identical electrical specifications across voltage breakdown, collector current, and forward current ratings. Both components operate as reflective phototransistor sensors with matching electrical performance parameters.

Parameter Comparison

Engineering Selection Recommendations

The OPB704 from TT Electronics / Optek Technology is electrically equivalent to the OPB704W across all critical electrical parameters. Both components maintain identical voltage and current specifications, enabling direct functional substitution in circuits designed for phototransistor-based reflective sensing.

The OPB704 carries active product status and ROHS3 compliance certification, providing advantages for new designs and applications subject to environmental regulations. The OPB704W, being obsolete and RoHS non-compliant, should be replaced with the OPB704 in procurement planning.

Physical integration differences exist: the OPB704W is a pre-wired chassis-mount module, while the OPB704 is a through-hole PCB-mount component. These packaging differences require mechanical redesign consideration in applications where the original form factor is structurally integrated.

Frequently Asked Questions (FAQ)

Q: Can the OPB704 directly replace the OPB704W in existing circuits?

A: Electrical substitution is valid. Both components share identical voltage breakdown (30 V), collector current (25 mA), and forward current (40 mA) specifications. However, mechanical integration differs: the OPB704W is a pre-wired module for chassis mounting, while the OPB704 is a through-hole PCB-mount component. Circuit board layout and mechanical mounting must be evaluated for compatibility.

Q: What is the significance of the sensing distance difference between these parts?

A: The OPB704W operates at 0.200" (5.08mm) sensing distance, while the OPB704 operates at 0.149" (3.8mm). This difference affects the maximum gap between the sensor and reflective target. Applications requiring the full 5.08mm sensing distance must verify that the OPB704's 3.8mm capability meets functional requirements.

Q: Why is RoHS compliance status different between these parts?

A: The OPB704W is RoHS non-compliant and obsolete. The OPB704 is ROHS3 compliant and maintains active product status. For applications subject to environmental regulations or requiring long-term component availability, the OPB704 is the preferred selection.

Q: Are there any temperature range limitations with the OPB704?

A: The OPB704W specifies an operating temperature range of -45°C to 85°C. The OPB704 datasheet does not provide an operating temperature specification in the available parameters. Temperature performance must be verified against application requirements before final selection.

Q: What mounting considerations apply when switching from OPB704W to OPB704?

A: The OPB704W uses chassis mounting with pre-wired connections, while the OPB704 uses through-hole PCB mounting. Circuit board redesign is required to accommodate the different physical form factor and connection method.