Omron EE-SX138 Optical Sensor: Equivalent & Substitute Parts

Part Overview

The Omron EE-SX138 is an optical sensor designed for through-beam detection applications using phototransistor output. This unamplified sensor operates with a 0.134" (3.4mm) sensing distance and is configured for PCB mount installation via through-hole mounting. The part is currently active in production status with 1082 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, supply chain continuity, or inventory optimization.

Key Parameters

Parameter	Value
Sensing Distance	0.134" (3.4mm)
Sensing Method	Through-Beam
Output Configuration	Phototransistor
Current - DC Forward (If) (Max)	50 mA
Current - Collector (Ic) (Max)	20 mA
Voltage - Collector Emitter Breakdown (Max)	30 V
Response Time	4µs, 4µs
Operating Temperature	-25°C ~ 85°C
Mounting Type	Through Hole
Package / Case	PCB Mount
Type	Unamplified
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the EE-SX138 are qualified based on matching the following critical parameters:

Sensing distance: 0.134" (3.4mm)
Sensing method: Through-beam
Output configuration: Phototransistor
Current ratings: If (Max) 50 mA, Ic (Max) 20 mA
Voltage rating: Collector-emitter breakdown 30 V
Response time: 4µs, 4µs
Operating temperature range: -25°C ~ 85°C
Mounting type: Through hole
Package type: PCB mount
Sensor type: Unamplified

All identified substitute parts meet these electrical and mechanical specifications. Variations in RoHS compliance status, REACH classification, and moisture sensitivity level do not affect functional equivalence for this sensor category.

Parameter Comparison

Part Number	Manufacturer	Sensing Distance	Sensing Method	Output Config	If (Max)	Ic (Max)	VCE Breakdown (Max)	Response Time	Operating Temp	Mounting Type	Package	Type	RoHS Status	Inventory
EE-SX138	Omron Electronics Inc-EMC Div	0.134" (3.4mm)	Through-Beam	Phototransistor	50 mA	20 mA	30 V	4µs, 4µs	-25°C ~ 85°C	Through Hole	PCB Mount	Unamplified	RoHS Compliant	1082 Pcs
EE-SJ3-G	Omron Electronics Inc-EMC Div	0.134" (3.4mm)	Through-Beam	Phototransistor	50 mA	20 mA	30 V	4µs, 4µs	-25°C ~ 85°C	Through Hole	PCB Mount	Unamplified	RoHS Compliant	1106 Pcs
EE-SV3-B	Omron Electronics Inc-EMC Div	0.134" (3.4mm)	Through-Beam	Phototransistor	50 mA	20 mA	30 V	4µs, 4µs	-25°C ~ 85°C	Through Hole	PCB Mount	Unamplified	RoHS Compliant	5222 Pcs
EE-SV3-C	Omron Electronics Inc-EMC Div	0.134" (3.4mm)	Through-Beam	Phototransistor	50 mA	20 mA	30 V	4µs, 4µs	-25°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	936 Pcs
EE-SV3-D	Omron Electronics Inc-EMC Div	0.134" (3.4mm)	Through-Beam	Phototransistor	50 mA	20 mA	30 V	4µs, 4µs	-25°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1148 Pcs
EE-SX1071	Omron Electronics Inc-EMC Div	0.134" (3.4mm)	Through-Beam	Phototransistor	50 mA	20 mA	30 V	4µs, 4µs	-25°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	2620 Pcs
EE-SX1088	Omron Electronics Inc-EMC Div	0.134" (3.4mm)	Through-Beam	Phototransistor	50 mA	20 mA	30 V	4µs, 4µs	-25°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	14565 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain identical electrical performance and mechanical compatibility with the EE-SX138. Selection among these equivalents should be based on:

Product Status: All parts are active in production.

Compliance Requirements: The EE-SX138 carries RoHS Compliant status. Substitute parts EE-SJ3-G and EE-SV3-B also carry RoHS Compliant designation. Parts EE-SV3-C, EE-SV3-D, EE-SX1071, and EE-SX1088 carry ROHS3 Compliant status, which represents an updated compliance framework. Selection should align with your product's compliance documentation requirements.

Inventory Availability: EE-SX1088 offers the highest stock level at 14565 units, followed by EE-SV3-B at 5222 units. Lower inventory parts include EE-SV3-C (936 units) and EE-SX138 (1082 units).

Regulatory Classification: REACH status varies among parts. EE-SJ3-G and EE-SX1071 are REACH Affected. EE-SV3-B is REACH Affected. EE-SV3-C and EE-SV3-D are REACH Unaffected. EE-SX1088 is REACH Affected. Verify alignment with your supply chain and end-market requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute EE-SX138 with any of the listed parts without circuit modification?

A: Yes. All listed parts share identical electrical parameters including current ratings, voltage breakdown specifications, response time, and operating temperature range. PCB mount through-hole packaging is consistent across all parts, enabling direct substitution without circuit redesign.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant designations?

A: Both designations indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents a more recent version of the compliance standard. Both are acceptable for most applications; verify your specific regulatory requirements with your compliance documentation.

Q: Are there differences in sensing performance between the EE-SX138 and its substitutes?

A: No. All parts operate with identical sensing distance (0.134" / 3.4mm), sensing method (through-beam), output type (phototransistor), and response time (4µs, 4µs). Functional performance in detection applications is equivalent.

Q: How do REACH classifications affect part selection?

A: REACH Affected and REACH Unaffected designations indicate regulatory classification for chemical substance management in the European Union. Selection should align with your product's end-market destination and supply chain compliance requirements. Consult your compliance team for specific guidance.

Q: Which substitute part should I choose for maximum inventory availability?

A: EE-SX1088 provides the highest stock level at 14565 units. This part is electrically and mechanically equivalent to the EE-SX138 and carries ROHS3 Compliant and REACH Affected designations.

Q: Is moisture sensitivity level a factor in substitution?

A: Moisture sensitivity levels vary among the listed parts (Not Applicable or MSL 1 Unlimited). For through-hole PCB mount optical sensors in standard industrial environments, these variations do not affect functional equivalence. Verify storage and handling requirements based on your specific manufacturing process.

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