RPI-243 Equivalent & Substitute Parts

Part Overview

The RPI-243 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 0.079" (2mm) sensing distance. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical specifications, and environmental operating parameters to ensure direct functional interchangeability in circuit designs.

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-243 are qualified based on strict parametric equivalence across the following critical specifications:

Sensing distance: 0.079" (2mm)
Sensing method: Through-Beam
Output configuration: Phototransistor
Maximum collector current (Ic): 30 mA
Maximum forward current (If): 50 mA
Collector-emitter breakdown voltage: 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 substitute parts listed maintain identical electrical performance characteristics and mechanical compatibility with the RPI-243, enabling direct replacement without circuit redesign.

Parameter Comparison

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

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full RoHS3 compliance, meeting current regulatory requirements for electronic component procurement. The RPI-243, RPI-222, and RPI-246 are manufactured by Rohm Semiconductor, while EE-SX1103 and EE-SX1105 are manufactured by Omron Electronics Inc-EMC Div. All parts carry REACH unaffected designation and EAR99 ECCN classification.

Selection between substitute parts may be influenced by inventory availability and supply chain considerations. RPI-246 maintains the highest inventory level at 145,573 pieces. EE-SX1105 maintains the lowest inventory at 13,423 pieces. All parts are classified as new original stock.

Frequently Asked Questions (FAQ)

Q: Can RPI-222, RPI-246, EE-SX1103, and EE-SX1105 be used interchangeably with RPI-243?

A: Yes. All listed substitute parts match the RPI-243 across all critical electrical and mechanical parameters, including sensing distance, output configuration, current ratings, voltage ratings, response time, operating temperature range, and mounting specifications.

Q: What determines substitution eligibility for optical sensor phototransistors?

A: Substitution eligibility is determined by matching sensing distance, sensing method, output configuration, maximum collector current, maximum forward current, collector-emitter breakdown voltage, response time, operating temperature range, mounting type, and package configuration.

Q: Are there differences in moisture sensitivity between RPI-243 and the Omron substitute parts?

A: RPI-243 specifies Moisture Sensitivity Level (MSL) 1 (Unlimited). EE-SX1103 and EE-SX1105 specify MSL as Not Applicable. This difference does not affect electrical or mechanical interchangeability.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. RPI-243, RPI-222, RPI-246, EE-SX1103, and EE-SX1105 all carry RoHS3 Compliant designation.

Q: What is the operating temperature range for all parts?

A: All parts operate across the identical temperature range of -25°C to 85°C.

Q: Are there packaging differences between substitute parts?

A: No. All parts use identical Through Hole mounting type with PCB Mount package configuration.

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