HCC240TXV Equivalent & Substitute Parts

Part Overview

The HCC240TXV is a 1000VDC optoisolator with transistor output, designed for single-channel isolation applications. Manufactured by TT Electronics/Optek Technology, this component features a 4-SMD surface mount package with a 50mA output current capability and 25% minimum current transfer ratio at 10mA input.

The HCC240TXV is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system maintenance.

Substiute Parts

HCC240TXV

TT Electronics/Optek TechnologyIn Stock: 875HCC240TXV Datasheet

Current PartRFQ

HCC242TX

TT Electronics/Optek TechnologyIn Stock: 976HCC242TX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCC240TXV is determined by the following critical parameters:

• Isolation Voltage: 1000VDC (must match exactly)
• Number of Channels: 1 (must match exactly)
• Output Type: Transistor (must match exactly)
• Maximum Output Voltage: 30V (must match or exceed)
• Maximum Output Current: 50mA (must match or exceed)
• Vce Saturation: 300mV (must match or be lower)
• Operating Temperature Range: -55°C ~ 125°C (must encompass or match)
• Mounting Type: Surface Mount (must match)

The HCC242TX qualifies as a direct substitute based on these parameters. Both parts share identical isolation voltage, channel count, output type, voltage/current ratings, and operating temperature specifications. The HCC242TX is available in an active product status with improved current transfer ratio performance and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The HCC242TX is the qualified substitute for the HCC240TXV based on electrical and mechanical parameter equivalence. Key selection factors include:

Product Status: The HCC242TX maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete HCC240TXV.

Compliance: The HCC242TX is ROHS3 compliant, meeting current regulatory requirements for electronic components in regulated markets. The HCC240TXV is RoHS non-compliant.

Performance: The HCC242TX provides superior current transfer ratio performance (100% @ 10mA versus 25% @ 10mA), delivering improved efficiency in isolation circuits while maintaining all critical electrical parameters.

Electrical Equivalence: Both parts share identical isolation voltage (1000VDC), output ratings (30V, 50mA), saturation characteristics (300mV), and operating temperature range (-55°C ~ 125°C).

Frequently Asked Questions (FAQ)

Q: Can the HCC242TX directly replace the HCC240TXV in existing designs?

A: Yes. The HCC242TX meets all electrical and mechanical requirements for direct substitution. Both parts feature identical isolation voltage, output voltage/current ratings, saturation voltage, and operating temperature specifications. Surface mount package compatibility is maintained.

Q: What is the difference in current transfer ratio between these parts?

A: The HCC240TXV specifies a minimum current transfer ratio of 25% at 10mA input, while the HCC242TX specifies 100% at 10mA input. This means the HCC242TX requires less input current to achieve the same output performance, improving overall circuit efficiency.

Q: Are there package differences between HCC240TXV and HCC242TX?

A: Both parts use 4-SMD surface mount packages with no leads. The HCC242TX is specified as 4-CLCC (5.59x3.81mm), which is compatible with standard 4-SMD footprints used for the HCC240TXV.

Q: Does the HCC242TX meet current regulatory compliance standards?

A: Yes. The HCC242TX is ROHS3 compliant, meeting current environmental and regulatory requirements. The HCC240TXV is RoHS non-compliant and does not meet modern regulatory standards.

Q: What are the rise and fall time differences?

A: The HCC240TXV specifies 15µs rise and fall times, while the HCC242TX specifies 20µs. Both values are within acceptable ranges for standard optoisolator applications. Circuit timing requirements should be verified for specific applications.