H11C4M Equivalent & Substitute Parts

Part Overview

The H11C4M is an optoisolator with SCR output manufactured by Central Semiconductor Corp, rated for 5000Vrms isolation voltage in a 6-DIP through-hole package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The H11C4M provides single-channel optical isolation with SCR output capability, suitable for applications requiring high-voltage isolation and switching control.

Substiute Parts

H11C4M

Central Semiconductor CorpIn Stock: 1068H11C4M Datasheet

Current PartRFQ

TLP748J(F)

Toshiba Semiconductor and StorageIn Stock: 1433TLP748J(F) Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the H11C4M is based on the following critical parameters:

• Output Type: SCR output configuration required
• Number of Channels: Single-channel isolation
• Isolation Voltage: Minimum 4000Vrms acceptable (H11C4M rated 5000Vrms)
• On-State Current: 150 mA maximum rating
• Package Type: 6-DIP through-hole configuration
• Mounting Compatibility: Through-hole mounting required

The TLP748J(F) qualifies as a substitute based on matching output type (SCR), channel count (1), package format (6-DIP), and on-state current rating (150 mA). While the TLP748J(F) has a lower isolation voltage rating (4000Vrms versus 5000Vrms), it meets the functional requirements for applications within its specified isolation voltage range.

Parameter Comparison

Engineering Selection Recommendations

The TLP748J(F) is an active product from Toshiba Semiconductor and Storage, providing continuity for applications currently using the obsolete H11C4M. The TLP748J(F) carries RoHS3 compliance and holds multiple approval certifications (BSI, SEMKO, UR), supporting regulatory requirements for new designs.

Key considerations for selection:

• Isolation Voltage: The TLP748J(F) provides 4000Vrms isolation versus the H11C4M's 5000Vrms. Applications requiring 5000Vrms isolation must evaluate alternative solutions.
• Off-State Voltage: The TLP748J(F) offers higher off-state voltage (600 V versus 400 V), providing additional margin in high-voltage switching applications.
• LED Trigger Current: The TLP748J(F) requires lower trigger current (10mA versus 20mA), reducing input circuit power requirements.
• Package Dimensions: The TLP748J(F) uses a larger 6-DIP package (0.400" versus 0.300"), requiring PCB layout verification for pin-to-pin compatibility.
• Compliance Status: The TLP748J(F) is RoHS3 compliant with active manufacturer support, whereas the H11C4M is obsolete.

Frequently Asked Questions (FAQ)

Q: Can the TLP748J(F) directly replace the H11C4M in existing designs?

A: Direct replacement is possible for applications operating within 4000Vrms isolation voltage requirements. PCB layout must accommodate the larger 6-DIP package dimension (0.400" versus 0.300"). Pin configuration and functional behavior are compatible for SCR output switching applications.

Q: What is the isolation voltage difference between these parts?

A: The H11C4M is rated for 5000Vrms isolation, while the TLP748J(F) is rated for 4000Vrms. Applications requiring 5000Vrms isolation must confirm that 4000Vrms meets system safety and regulatory requirements before substitution.

Q: Are there package compatibility issues?

A: Both parts use 6-DIP through-hole packages, but with different body dimensions. The H11C4M uses 0.300" (7.62mm) spacing, while the TLP748J(F) uses 0.400" (10.16mm) spacing. PCB hole patterns and component placement must be verified for compatibility.

Q: What are the LED trigger current differences?

A: The H11C4M requires a maximum of 20mA LED trigger current, while the TLP748J(F) requires only 10mA. The lower trigger current of the TLP748J(F) reduces input circuit power dissipation and may simplify driver circuit design.

Q: Does the TLP748J(F) meet current regulatory compliance standards?

A: Yes, the TLP748J(F) is RoHS3 compliant and holds certifications from BSI, SEMKO, and UR. The H11C4M, being obsolete, does not carry current compliance documentation.