OPB491L11Z Equivalent & Substitute Parts

Part Overview

The OPB491L11Z is an optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This through-beam optical sensor features a 0.125" (3.18mm) sensing distance with NPN open collector output configuration and wire lead packaging for chassis mount applications. The component is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when original inventory becomes unavailable or when equivalent electrical and mechanical specifications are required for system continuity.

Substiute Parts

OPB491L11Z

TT Electronics/Optek TechnologyIn Stock: 848OPB491L11Z Datasheet

Current PartRFQ

OPB481L11Z

TT Electronics/Optek TechnologyIn Stock: 3140OPB481L11Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The OPB481L11Z is identified as a manufacturer-recommended substitute for the OPB491L11Z. Substitution eligibility is determined by equivalence across the following critical parameters:

• Sensing Distance: 0.125" (3.18mm)
• Sensing Method: Through-Beam
• Output Configuration: NPN - Open Collector, Buffer
• Voltage Supply Range: 4.5V ~ 16V
• Current Supply: 7.5 mA
• Response Time: 50ns
• Operating Temperature Range: -40°C ~ 85°C
• Package Configuration: Module, Wire Leads
• Mounting Type: Chassis Mount
• Compliance Standards: ROHS3 Compliant, REACH Unaffected

Both parts share identical electrical performance characteristics and mechanical form factors, enabling direct substitution in applications requiring through-beam optical sensing at 3.18mm distance with NPN output buffering.

Parameter Comparison

Engineering Selection Recommendations

Both the OPB491L11Z and OPB481L11Z maintain Active product status within the Photologic® series, ensuring continued manufacturer support and availability. Selection between these parts is based on inventory availability and supply chain requirements rather than functional differentiation. Both components satisfy ROHS3 compliance and REACH unaffected regulatory requirements for industrial and commercial applications. The OPB481L11Z currently maintains higher inventory levels (3099 pcs) compared to the OPB491L11Z (767 pcs), making it the preferred selection when supply continuity is a consideration.

Frequently Asked Questions (FAQ)

Q: Can the OPB481L11Z directly replace the OPB491L11Z in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all specified parameters, including sensing distance, output configuration, supply voltage range, and response time. No circuit modifications are required.

Q: Are there differences in the wire lead configuration between these parts?

A: No. Both parts use identical Module, Wire Leads packaging with Chassis Mount mounting type.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the OPB491L11Z and OPB481L11Z are ROHS3 compliant with REACH unaffected status and MSL rating of 1 (Unlimited).

Q: What is the operational difference between these optical sensors?

A: There is no operational difference. Both sensors function identically as through-beam optical sensors with 0.125" (3.18mm) sensing distance, NPN open collector output, and 50ns response time across the -40°C to 85°C operating temperature range.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection may be based on current inventory availability, lead time, or supplier preference, as both parts are functionally equivalent.