HCC240 Equivalent & Substitute Parts

Part Overview

The HCC240 is a 1000VDC optoisolator with transistor output, single channel configuration in 4-SMD surface mount packaging. This component provides galvanic isolation for DC input signals with a 50mA output current capability and 1.5V typical forward voltage. The HCC240 is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - Isolation	1000VDC
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	25% @ 10mA
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Vce Saturation (Max)	300mV
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the HCC240 optoisolator is based on electrical and mechanical parameter equivalence. The critical parameters determining substitutability are:

Voltage isolation rating (1000VDC minimum)
Single channel transistor output configuration
Output current capability (50mA)
Maximum output voltage (30V)
Vce saturation characteristics (300mV maximum)
Operating temperature range (-55°C ~ 125°C)
Surface mount packaging compatibility

The HCC242 meets all electrical specifications of the HCC240 while offering improved current transfer ratio performance (100% @ 10mA versus 25% @ 10mA) and active product status with RoHS3 compliance. Both components share identical isolation voltage, output current rating, saturation voltage, and temperature operating range.

Parameter Comparison

Parameter	HCC240	HCC242
Manufacturer	TT Electronics/Optek Technology	TT Electronics/Optek Technology
Category	Optoisolators	Optoisolators
Number of Channels	1	1
Voltage - Isolation	1000VDC	1000VDC
Current Transfer Ratio (Min)	25% @ 10mA	100% @ 10mA
Rise / Fall Time (Typ)	15µs, 15µs	20µs, 20µs
Output Type	Transistor	Transistor
Voltage - Output (Max)	30V	30V
Current - Output / Channel	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.5V (Max)	1.5V (Max)
Current - DC Forward (If) (Max)	40mA	40mA
Vce Saturation (Max)	300mV	300mV
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	4-SMD, No Lead	4-SMD, No Lead
Supplier Device Package	4-SMD	4-CLCC (5.59x3.81)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The HCC242 is the direct substitute for the HCC240 optoisolator. Both components share identical electrical specifications for isolation voltage, output current, saturation voltage, and operating temperature range. The HCC242 provides superior current transfer ratio performance at 100% @ 10mA compared to the HCC240 at 25% @ 10mA, resulting in improved signal integrity and reduced input current requirements.

The HCC242 holds active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs. The HCC240, classified as obsolete, presents supply chain risk and does not meet current environmental compliance standards.

Frequently Asked Questions (FAQ)

Q: Can the HCC242 directly replace the HCC240 in existing designs?

A: Yes. The HCC242 meets all electrical specifications of the HCC240, including 1000VDC isolation, 50mA output current, 30V maximum output voltage, and 300mV maximum Vce saturation. Both components operate across the -55°C to 125°C temperature range.

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

A: The HCC240 specifies 25% minimum current transfer ratio at 10mA input current, while the HCC242 specifies 100% minimum at the same input level. This means the HCC242 requires less input current to achieve equivalent output performance.

Q: Are there packaging differences between HCC240 and HCC242?

A: Both components use 4-SMD surface mount packaging with no leads. The HCC240 is specified as 4-SMD, while the HCC242 is specified as 4-CLCC (5.59x3.81). Both are compatible with standard surface mount assembly processes.

Q: What is the compliance status difference?

A: The HCC240 is RoHS non-compliant and obsolete. The HCC242 is ROHS3 compliant and maintains active product status, providing regulatory alignment and supply chain continuity.

Q: Are the rise and fall times identical?

A: The HCC240 specifies 15µs rise and fall times, while the HCC242 specifies 20µs. Both values are within typical optoisolator performance ranges and do not affect functional substitutability in standard applications.

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