LCB111STR Equivalent & Substitute Parts

Part Overview

The LCB111STR is an optically isolated solid state relay (SSR) manufactured by IXYS Integrated Circuits Division. It functions as a SPST-NC (1 Form B) relay with a maximum load current of 120 mA and load voltage range of 0–350 V AC/DC. The device is surface mounted in a 6-SMD package with gull wing termination and is supplied in Tape & Reel packaging. The LCB111STR maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Equivalent substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the OptoMOS® relay category.

Substiute Parts

LCB111STR

IXYS Integrated Circuits DivisionIn Stock: 2485LCB111STR Datasheet

Current PartRFQ

LH1501BAB

Vishay Semiconductor Opto DivisionIn Stock: 1392LH1501BAB Datasheet

MFR RecommendedRFQ

LH1501BABTR

Vishay Semiconductor Opto DivisionIn Stock: 3807LH1501BABTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCB111STR are qualified based on the following electrical and mechanical parameters:

• Circuit Configuration: Must be SPST-NC (1 Form B) to maintain identical switching topology
• Package / Case: Must be 6-SMD (0.300", 7.62mm) with gull wing termination for PCB compatibility
• Mounting Type: Must be Surface Mount
• Load Voltage Range: Must support 0–350 V AC/DC operation
• Output Type: Must support both AC and DC loads
• Load Current: Must meet or exceed 120 mA minimum requirement
• On-State Resistance: Lower values indicate improved performance; substitutes with ≤35 Ohms are acceptable
• Input Voltage: Must be compatible with 1.2 VDC control signal (±5% tolerance typical)
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The LH1501BAB and LH1501BABTR (Vishay Semiconductor Opto Division) meet all substitution criteria with enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both LH1501BAB and LH1501BABTR are direct functional equivalents to the LCB111STR with superior electrical performance. The LH1501 series provides 150 mA load current capacity versus 120 mA for the LCB111STR, and reduced on-state resistance of 20 Ohms compared to 35 Ohms maximum. Input voltage specification of 1.26 VDC is compatible with the LCB111STR's 1.2 VDC requirement within standard control signal tolerances.

Selection between LH1501BAB and LH1501BABTR depends on packaging requirements. The LH1501BABTR is supplied in Tape & Reel format matching the original LCB111STR packaging, while LH1501BAB is supplied in Tube packaging. Both maintain identical electrical specifications, ROHS3 compliance, and MSL 1 rating. All three parts are Active status products suitable for new designs and production applications.

Frequently Asked Questions (FAQ)

Q: Can LH1501BAB or LH1501BABTR be used as direct replacements for LCB111STR in existing designs?

A: Yes. Both Vishay parts are pin-compatible and functionally equivalent. The 6-SMD package with gull wing termination is identical, and electrical parameters are compatible. The higher load current rating (150 mA vs. 120 mA) and lower on-state resistance (20 Ohms vs. 35 Ohms) represent performance improvements with no design modifications required.

Q: What is the difference between LH1501BAB and LH1501BABTR?

A: The parts are electrically identical. LH1501BABTR is supplied in Tape & Reel packaging suitable for automated assembly, while LH1501BAB is supplied in Tube packaging. Select based on your procurement and assembly process requirements.

Q: Are the input voltage specifications compatible?

A: Yes. The LCB111STR operates at 1.2 VDC input, while LH1501 series operates at 1.26 VDC input. This 0.06 VDC difference is within standard control signal tolerances and does not require circuit modifications.

Q: Do all three parts meet the same compliance standards?

A: Yes. LCB111STR, LH1501BAB, and LH1501BABTR are all ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. All are Active status products.

Q: What are the key parameters that determine substitution eligibility?

A: Circuit configuration (SPST-NC), package type (6-SMD with gull wing), load voltage range (0–350 V AC/DC), and load current capacity (minimum 120 mA) are the primary substitution criteria. On-state resistance, input voltage compatibility, and compliance certifications must also align.