RPI-222 Equivalent & Substitute Parts

Part Overview

The RPI-222 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 unlimited moisture sensitivity rating (MSL 1). 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 Range	-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-222 are qualified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is determined by the following key parameters:

Sensing distance: 0.079" (2mm)
Sensing method: Through-Beam
Output configuration: Phototransistor (unamplified)
Maximum collector current: 30 mA
Maximum 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

All substitute parts listed (RPI-243, RPI-246, EE-SX1103, EE-SX1105) match these parameters identically. Rohm Semiconductor parts (RPI-243, RPI-246) and Omron Electronics parts (EE-SX1103, EE-SX1105) are functionally equivalent and may be used interchangeably in applications requiring optical through-beam sensing with phototransistor output.

Parameter Comparison

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

Engineering Selection Recommendations

All substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements for current applications. Selection between RPI-222 and substitute parts should be based on inventory availability and supply chain considerations:

RPI-246 offers the highest inventory level at 145,573 pieces, providing supply security for high-volume production requirements. RPI-222 and RPI-243 maintain equivalent inventory at 55,530 pieces each. EE-SX1103 provides 53,642 pieces in stock. EE-SX1105 maintains the lowest inventory at 13,423 pieces.

All parts carry identical electrical ratings, response characteristics, and environmental specifications. Cross-manufacturer substitution between Rohm Semiconductor and Omron Electronics parts is supported by complete parametric equivalence. PCB mount through-hole packaging is consistent across all alternatives, ensuring mechanical compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can RPI-243, RPI-246, EE-SX1103, and EE-SX1105 be used as direct replacements for RPI-222?

A: Yes. All substitute parts match the RPI-222 across all critical parameters: 0.079" (2mm) sensing distance, through-beam sensing method, phototransistor output configuration, 30 mA maximum collector current, 30 V maximum collector-emitter breakdown voltage, 10µs response time, -25°C to 85°C operating temperature range, through-hole mounting, and PCB mount package type. Direct substitution is supported without circuit modification.

Q: Are there differences between Rohm Semiconductor and Omron Electronics versions?

A: Rohm Semiconductor parts (RPI-222, RPI-243, RPI-246) and Omron Electronics parts (EE-SX1103, EE-SX1105) are parametrically equivalent. Both manufacturers' parts meet ROHS3 compliance and identical electrical specifications. Selection between manufacturers should be based on inventory availability and procurement preferences.

Q: What parameters determine substitution eligibility?

A: Substitution is determined by matching sensing distance (0.079" / 2mm), sensing method (through-beam), output type (phototransistor), collector current rating (30 mA maximum), collector-emitter breakdown voltage (30 V maximum), response time (10µs), operating temperature range (-25°C to 85°C), mounting type (through-hole), and package configuration (PCB mount).

Q: Can these parts be used in applications requiring different sensing distances?

A: No. All listed parts are specified for 0.079" (2mm) sensing distance. Applications requiring different sensing distances require alternative part selection outside this equivalence group.

Q: Are moisture sensitivity ratings identical across all parts?

A: Rohm Semiconductor parts (RPI-222, RPI-243, RPI-246) carry MSL 1 (Unlimited) rating. Omron Electronics parts (EE-SX1103, EE-SX1105) carry MSL Not Applicable designation. Both ratings support standard PCB assembly and storage conditions without special handling requirements.

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