LCB111 Solid State Relay - Equivalent & Substitute Parts

Part Overview

The LCB111 is an optically isolated solid state relay (SSR) manufactured by IXYS Integrated Circuits Division. It functions as a SPST-NC (Single Pole Single Throw, Normally Closed) switching device rated for 120 mA load current across 0-350V AC/DC applications. The device is housed in a 6-DIP through-hole package and maintains Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

LCB111

IXYS Integrated Circuits DivisionIn Stock: 1797LCB111 Datasheet

Current PartRFQ

LH1501BT

Vishay Semiconductor Opto DivisionIn Stock: 2185LH1501BT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LH1501BT qualifies as a direct substitute for the LCB111 based on the following critical parameters:

Electrical Compatibility:

• Both devices maintain SPST-NC circuit configuration with identical 1 Form B switching topology
• Load voltage range is identical: 0 V ~ 350 V for AC and DC applications
• Input voltage requirements are compatible: LCB111 requires 1.2 VDC; LH1501BT requires 1.26 VDC (within acceptable control signal tolerance)
• Load current rating of LH1501BT (150 mA) exceeds the LCB111 requirement (120 mA), providing operational margin
• On-state resistance of LH1501BT (20 Ohms maximum) is superior to LCB111 (35 Ohms maximum), reducing power dissipation

Mechanical Compatibility:

• Identical package format: 6-DIP (0.300", 7.62mm)
• Identical termination style: PC Pin
• Through-hole mounting type matches existing PCB designs

Regulatory & Supply Status:

• Both devices are RoHS3 compliant and REACH unaffected
• Both maintain Active product status with current manufacturing support
• Identical HTSUS classification: 8536.41.0030

Parameter Comparison

Engineering Selection Recommendations

Both the LCB111 and LH1501BT are Active products with current manufacturing support and full RoHS3 compliance. The LH1501BT provides enhanced electrical performance through higher load current capacity (150 mA vs. 120 mA) and lower on-state resistance (20 Ohms vs. 35 Ohms), resulting in reduced thermal dissipation and improved switching efficiency. The input voltage differential (1.26 VDC vs. 1.2 VDC) is negligible for standard control circuit applications. Mechanical and regulatory equivalence is confirmed across all specified parameters. Selection between these parts should be based on supply availability, cost considerations, and thermal management requirements of the specific application.

Frequently Asked Questions (FAQ)

Q: Can the LH1501BT directly replace the LCB111 in existing PCB designs?

A: Yes. Both devices use identical 6-DIP (0.300", 7.62mm) through-hole packages with PC pin termination. No PCB modifications are required for mechanical compatibility.

Q: What is the significance of the load current difference (120 mA vs. 150 mA)?

A: The LH1501BT's higher load current rating (150 mA) exceeds the LCB111 requirement (120 mA). This provides operational margin and allows the substitute to handle the same or higher load demands without derating.

Q: Are the input voltage requirements compatible?

A: Yes. The LCB111 requires 1.2 VDC input while the LH1501BT requires 1.26 VDC input. This 0.06 VDC difference is within standard control signal tolerances and does not affect circuit functionality.

Q: How does the on-state resistance difference impact performance?

A: The LH1501BT's lower on-state resistance (20 Ohms maximum vs. 35 Ohms maximum) reduces power dissipation during switching operation, resulting in lower heat generation and improved efficiency.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the LCB111 and LH1501BT are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the inventory status for these parts?

A: The LCB111 has 1712 pieces in stock; the LH1501BT has 2100 pieces in stock. Both are available as new original components.