OPB841W55 Equivalent & Substitute Parts

Part Overview

The OPB841W55 is an optical sensor through-beam phototransistor module manufactured by TT Electronics/Optek Technology. This component is classified as obsolete, with 721 pieces available in new original stock. The sensor operates as an unamplified optical detector with a 0.125" (3.18mm) sensing distance and through-beam configuration. Due to its obsolete status, equivalent substitute parts from the same manufacturer are available to ensure design continuity and supply chain reliability.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB841W55
Manufacturer	TT Electronics/Optek Technology
Category	Optical Sensors
Sensing Distance	0.125" (3.18mm)
Sensing Method	Through-Beam
Output Configuration	Phototransistor
Current - DC Forward (If) (Max)	50 mA
Current - Collector (Ic) (Max)	30 mA
Voltage - Collector Emitter Breakdown (Max)	30 V
Operating Temperature	-40°C ~ 80°C
Mounting Type	Chassis Mount
Package / Case	Module, Pre-Wired
Type	Unamplified
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the OPB841W55 are qualified based on strict electrical and mechanical parameter matching. The critical parameters that determine substitutability are:

Sensing Distance: 0.125" (3.18mm)
Sensing Method: Through-Beam
Output Configuration: Phototransistor
Current - DC Forward (If) (Max): 50 mA
Current - Collector (Ic) (Max): 30 mA
Voltage - Collector Emitter Breakdown (Max): 30 V
Mounting Type: Chassis Mount
Package / Case: Module, Pre-Wired
Type: Unamplified
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All substitute parts listed maintain these core parameters. The primary difference between the OPB841W55 and its substitutes is product status (active versus obsolete) and minor variations in operating temperature range. The OPB841W55Z represents a direct packaging variant, while OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z are parametric equivalents with identical electrical and mechanical specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	VCE Breakdown (Max)	Operating Temperature	Mounting Type	Package / Case	Type	RoHS Status	Inventory
OPB841W55	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 80°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	721 Pcs
OPB841W55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 80°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	5868 Pcs
OPB360N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	1394 Pcs
OPB365N11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	658 Pcs
OPB365N51	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	1916 Pcs
OPB365P55	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	1052 Pcs
OPB370N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	1250 Pcs
OPB370N55	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	90400 Pcs
OPB375N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	648 Pcs
OPB380N11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	1100 Pcs
OPB380P51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant	651 Pcs

Engineering Selection Recommendations

The OPB841W55 is classified as obsolete. For new designs or ongoing production requiring this component, OPB841W55Z is the direct replacement, offering identical electrical and mechanical specifications with active product status and significantly higher inventory availability (5868 pieces versus 721 pieces).

All listed substitute parts maintain full compliance with ROHS3 and REACH requirements. The parametric equivalents (OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, OPB380P51Z) provide extended operating temperature ranges (-40°C to 85°C versus -40°C to 80°C) while maintaining all critical electrical parameters. These parts are suitable for applications requiring enhanced thermal performance.

OPB370N55 offers the highest inventory level (90400 pieces), providing optimal supply chain security for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can OPB841W55Z be used as a direct replacement for OPB841W55?

A: Yes. OPB841W55Z is electrically and mechanically identical to OPB841W55, with the primary difference being active product status and bulk packaging. All electrical parameters, sensing distance, output configuration, and mounting specifications are equivalent.

Q: What is the difference between OPB841W55Z and the parametric equivalents like OPB370N55?

A: OPB841W55Z maintains the exact operating temperature range of the original part (-40°C to 80°C). Parametric equivalents such as OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z extend the upper operating temperature limit to 85°C. All other electrical and mechanical parameters remain identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original OPB841W55 specifications.

Q: Which substitute part has the best inventory availability?

A: OPB370N55 provides the highest inventory level at 90400 pieces, followed by OPB841W55Z at 5868 pieces.

Q: Can parametric equivalents be used in applications with operating temperatures above 80°C?

A: Parametric equivalents are rated to -40°C to 85°C, making them suitable for applications requiring operation up to 85°C. The original OPB841W55 and OPB841W55Z are rated only to 80°C.

Q: Are there any packaging differences between substitute parts?

A: All substitute parts maintain the same package configuration: Module, Pre-Wired, Chassis Mount. Packaging designation (Bulk) is consistent across all active parts.

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