OPB848TX Equivalent & Substitute Parts

Part Overview

The OPB848TX is an optical sensor manufactured by TT Electronics/Optek Technology, designed as a through-beam phototransistor with PCB mount configuration. This component operates at a sensing distance of 0.100" (2.54mm) and is classified as an unamplified optical sensor for slot detection applications.

The OPB848TX carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Sensing Distance	0.100" (2.54mm)
Sensing Method	Through-Beam
Output Configuration	Phototransistor
Current - DC Forward (If) (Max)	50 mA
Voltage - Collector Emitter Breakdown (Max)	30 V
Response Time	12µs
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	PCB Mount
Type	Unamplified
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the OPB848TX are determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters establish substitution validity:

Sensing distance: 0.100" (2.54mm)
Sensing method: Through-Beam
Output configuration: Phototransistor
Maximum DC forward current: 50 mA
Maximum collector-emitter breakdown voltage: 30 V
Response time: 12µs
Operating temperature range: -40°C ~ 85°C
Mounting type: Through Hole
Package configuration: PCB Mount
Sensor type: Unamplified

All substitute parts listed maintain identical values across these parameters, confirming direct functional equivalence with the OPB848TX.

Parameter Comparison

Parameter	OPB848TX	OPB847	OPB847TX	OPB848
Manufacturer	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology
Sensing Distance	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Sensing Method	Through-Beam	Through-Beam	Through-Beam	Through-Beam
Output Configuration	Phototransistor	Phototransistor	Phototransistor	Phototransistor
Current - DC Forward (If) (Max)	50 mA	50 mA	50 mA	50 mA
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	30 V	30 V
Response Time	12µs	12µs	12µs	12µs
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	PCB Mount	PCB Mount	PCB Mount	PCB Mount
Type	Unamplified	Unamplified	Unamplified	Unamplified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

The OPB848TX is obsolete; however, three active substitute parts maintain complete parametric equivalence: OPB847, OPB847TX, and OPB848.

All substitute parts are manufactured by TT Electronics/Optek Technology and carry ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original component. All parts are classified as unamplified through-beam phototransistors with identical electrical ratings and thermal operating ranges.

For applications requiring the OPB848TX, selection among OPB847, OPB847TX, or OPB848 depends on packaging and inventory availability. OPB847TX and OPB848 are available in bulk packaging with higher inventory levels (857 and 1280 units respectively), while OPB847 is available in bulk with 1984 units in stock. All three parts are functionally interchangeable within the design constraints of the original application.

Frequently Asked Questions (FAQ)

Q: Can OPB847, OPB847TX, and OPB848 be used interchangeably with OPB848TX?

A: Yes. All three parts are parametric equivalents with identical electrical characteristics, sensing distance, response time, operating temperature range, and mounting configuration. They are direct functional substitutes.

Q: What is the difference between OPB847 and OPB847TX?

A: OPB847TX is a variant designation of the OPB847 base product. Both maintain identical electrical and mechanical specifications. The TX suffix indicates a specific packaging or tape/reel configuration variant.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. OPB847, OPB847TX, and OPB848 are all ROHS3 compliant and REACH unaffected, matching the regulatory status of the OPB848TX.

Q: Does the obsolete status of OPB848TX affect the availability of substitutes?

A: No. The substitute parts OPB847, OPB847TX, and OPB848 all carry active product status with confirmed inventory availability, ensuring supply chain continuity.

Q: Are there any differences in mounting or PCB layout requirements?

A: No. All parts use through-hole mounting with PCB mount configuration. No layout modifications are required for substitution.

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