RPI-246 Equivalent & Substitute Parts

Part Overview

The RPI-246 is an optical sensor manufactured by Rohm Semiconductor, classified as a through-beam phototransistor optical sensor with PCB mount packaging. This component is designed for slot-type optical sensing applications requiring a 0.079" (2mm) sensing distance. The part maintains Active product status with full RoHS3 compliance and REACH unaffected certification. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in applications where component availability or supply chain considerations necessitate alternative sourcing.

Key Parameters

Parameter	Value
Sensing Distance	0.079" (2mm)
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
Response Time	10µs, 10µs
Operating Temperature	-25°C ~ 85°C
Mounting Type	Through Hole
Package / Case	PCB Mount
Type	Unamplified
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the RPI-246 are qualified based on strict parametric equivalence across the following critical criteria:

Sensing distance: 0.079" (2mm)
Sensing method: Through-Beam
Output configuration: Phototransistor
Current ratings: If (Max) 50 mA, Ic (Max) 30 mA
Voltage rating: Collector Emitter Breakdown (Max) 30 V
Response time: 10µs, 10µs
Operating temperature range: -25°C ~ 85°C
Mounting type: Through Hole
Package type: PCB Mount
Sensor type: Unamplified

All identified substitute parts match these parameters exactly. Substitution is valid when these electrical and mechanical specifications are maintained across the component selection.

Parameter Comparison

Part Number	Manufacturer	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	VCE Breakdown (Max)	Response Time	Operating Temperature	Mounting Type	Package	RoHS Status	Inventory (Pcs)
RPI-246	Rohm Semiconductor	0.079" (2mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	10µs, 10µs	-25°C ~ 85°C	Through Hole	PCB Mount	ROHS3 Compliant	145573
RPI-222	Rohm Semiconductor	0.079" (2mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	10µs, 10µs	-25°C ~ 85°C	Through Hole	PCB Mount	ROHS3 Compliant	55530
RPI-243	Rohm Semiconductor	0.079" (2mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	10µs, 10µs	-25°C ~ 85°C	Through Hole	PCB Mount	ROHS3 Compliant	55530
EE-SX1103	Omron Electronics Inc-EMC Div	0.079" (2mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	10µs, 10µs	-25°C ~ 85°C	Through Hole	PCB Mount	ROHS3 Compliant	53642
EE-SX1105	Omron Electronics Inc-EMC Div	0.079" (2mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	10µs, 10µs	-25°C ~ 85°C	Through Hole	PCB Mount	ROHS3 Compliant	13423

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full RoHS3 compliance with REACH unaffected certification, matching the regulatory and environmental requirements of the RPI-246. Selection between Rohm Semiconductor variants (RPI-222, RPI-243) and Omron Electronics variants (EE-SX1103, EE-SX1105) is determined by supply chain availability and inventory levels. The RPI-246 maintains the highest inventory position at 145,573 pieces. Among substitutes, RPI-222 and RPI-243 from Rohm Semiconductor each carry 55,530 pieces in stock, while EE-SX1103 from Omron carries 53,642 pieces and EE-SX1105 carries 13,423 pieces. All parts are electrically and mechanically interchangeable based on the provided specifications.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the RPI-246?

A: Substitute parts must match all critical parameters: 0.079" (2mm) sensing distance, through-beam sensing method, phototransistor output configuration, 50 mA maximum forward current, 30 mA maximum collector current, 30 V collector-emitter breakdown voltage, 10µs response time, -25°C to 85°C operating temperature range, through-hole mounting, and PCB mount package type.

Q: Are Rohm Semiconductor and Omron Electronics parts directly interchangeable?

A: Yes. Both manufacturers' parts listed (RPI-222, RPI-243, EE-SX1103, EE-SX1105) meet identical electrical and mechanical specifications for the RPI-246 application. Interchangeability is based on parametric equivalence, not manufacturer preference.

Q: Does inventory level affect substitution validity?

A: No. Inventory levels reflect current stock availability and do not impact technical substitution eligibility. All listed parts are qualified substitutes regardless of inventory quantity.

Q: Are there any compliance differences between substitute parts?

A: All substitute parts maintain RoHS3 compliance and REACH unaffected status, matching the RPI-246 regulatory profile. Moisture Sensitivity Level (MSL) differs for Omron parts (Not Applicable) versus Rohm parts (MSL 1 - Unlimited), but this does not affect substitution validity for the specified application parameters.

Q: Can I use these substitutes in new designs or only for replacement applications?

A: These parts are parametric equivalents and can be used in both new designs and replacement applications where the specified electrical and mechanical parameters are required.

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