LOC111STR Equivalent & Substitute Parts

Part Overview

The LOC111STR is an optoisolator manufactured by IXYS Integrated Circuits Division, featuring photovoltaic linearized output with 3750Vrms isolation voltage. This component is classified as Active and maintains full RoHS3 compliance. The device is packaged in 8-SMD gull wing configuration for surface mount applications. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameter ranges for optoisolator photovoltaic devices.

Substiute Parts

LOC111STR

IXYS Integrated Circuits DivisionIn Stock: 1474LOC111STR Datasheet

Current PartRFQ

IL300-DEFG-X009T

Vishay Semiconductor Opto DivisionIn Stock: 1593IL300-DEFG-X009T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LOC111STR is based on the following criteria:

Mandatory Matching Parameters:

• Output Type: Photovoltaic, Linearized
• Input Type: DC
• Number of Channels: 1
• Mounting Type: Surface Mount
• RoHS3 Compliance: Required
• Product Status: Active

Allowable Parameter Variations:

• Voltage - Isolation: Equal to or greater than 3750Vrms
• Operating Temperature Range: Must encompass or exceed -40°C ~ 85°C
• Package / Case: Alternative SMD configurations acceptable if pin compatibility is maintained
• Voltage - Forward (Vf): Within typical operating range for photovoltaic optoisolators

The IL300-DEFG-X009T meets substitution criteria with higher isolation voltage (5300Vrms), extended operating temperature range (-55°C ~ 100°C), and equivalent photovoltaic linearized output topology.

Parameter Comparison

Engineering Selection Recommendations

Both the LOC111STR and IL300-DEFG-X009T are Active products with ROHS3 compliance and REACH unaffected status. The IL300-DEFG-X009T provides enhanced isolation voltage specification (5300Vrms versus 3750Vrms) and extended operating temperature range (-55°C ~ 100°C versus -40°C ~ 85°C). Selection between these components depends on application-specific isolation voltage requirements and thermal operating conditions. Both devices maintain equivalent photovoltaic linearized output topology and DC input characteristics.

Frequently Asked Questions (FAQ)

Q: Can IL300-DEFG-X009T directly replace LOC111STR in existing designs?

A: Functional substitution is possible when isolation voltage and operating temperature requirements are compatible with the IL300-DEFG-X009T specifications. Package differences (8-SMD versus 6-SMD) require PCB layout verification.

Q: What are the key differences between these optoisolators?

A: The IL300-DEFG-X009T provides higher isolation voltage (5300Vrms) and wider operating temperature range (-55°C ~ 100°C). Both devices feature identical photovoltaic linearized output topology and single-channel DC input configuration.

Q: Are both parts RoHS3 compliant?

A: Yes. Both LOC111STR and IL300-DEFG-X009T are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Does package configuration affect substitution?

A: Package differences exist (LOC111STR: 8-SMD gull wing; IL300-DEFG-X009T: 6-SMD gull wing). PCB footprint and pin assignment must be verified for mechanical compatibility in the target application.

Q: What isolation voltage should I select?

A: Select isolation voltage equal to or exceeding the application requirement. The IL300-DEFG-X009T 5300Vrms rating provides higher margin than LOC111STR 3750Vrms for applications requiring enhanced isolation performance.