OPIA406CTUE Equivalent & Substitute Parts

Part Overview

The OPIA406CTUE is a 2500Vrms optoisolator with Darlington output manufactured by TT Electronics/Optek Technology in a 4-SSOP surface mount package. This component provides galvanic isolation for single-channel DC input applications with 90mA output current capability. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Renesas Electronics Corporation offers multiple PS2802 series variants that maintain electrical and mechanical compatibility with the OPIA406CTUE.

Key Parameters

Parameter	Value
Isolation Voltage	2500Vrms
Number of Channels	1
Output Type	Darlington
Maximum Output Voltage	40V
Maximum Output Current	90mA
Package / Case	4-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Operating Temperature Range	-30°C ~ 100°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the OPIA406CTUE is based on strict equivalence of the following parameters:

Isolation voltage: 2500Vrms (all substitutes match)
Output configuration: Single-channel Darlington output (all substitutes match)
Package: 4-SOIC surface mount (all substitutes match)
Maximum output voltage: 40V (all substitutes match)
Maximum output current: 90mA (all substitutes match)
Input type: DC (all substitutes match)
Rise/Fall time: 200µs, 200µs (all substitutes match)
Vce saturation: 1V maximum (all substitutes match)
Forward voltage: 1.1V typical (all substitutes match)
Maximum forward current: 50mA (all substitutes match)

The PS2802 series variants differ in current transfer ratio specifications and product status, but all maintain the core electrical and mechanical parameters required for direct substitution.

Parameter Comparison

Parameter	OPIA406CTUE	PS2802-1-A	PS2802-1-F3-K-A	PS2802-1-K-A	PS2802-1-M-A
Manufacturer	TT Electronics/Optek	Renesas	Renesas	Renesas	Renesas
Isolation Voltage	2500Vrms	2500Vrms	2500Vrms	2500Vrms	2500Vrms
Number of Channels	1	1	1	1	1
Output Type	Darlington	Darlington	Darlington	Darlington	Darlington
Current Transfer Ratio (Min)	20% @ 1mA	200% @ 1mA	2000% @ 1mA	2000% @ 1mA	200% @ 1mA
Current Transfer Ratio (Max)	—	—	—	—	1000% @ 1mA
Maximum Output Voltage	40V	40V	40V	40V	40V
Maximum Output Current	90mA	90mA	90mA	90mA	90mA
Vce Saturation (Max)	1V	1V	1V	1V	1V
Rise / Fall Time (Typ)	200µs, 200µs	200µs, 200µs	200µs, 200µs	200µs, 200µs	200µs, 200µs
Operating Temperature	-30°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Package / Case	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)
Product Status	Obsolete	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Affected	REACH Affected

Engineering Selection Recommendations

For new designs and ongoing production, PS2802-1-F3-K-A and PS2802-1-K-A are the preferred substitutes. Both parts carry Active product status, ensuring long-term availability and manufacturer support. PS2802-1-F3-K-A offers the highest current transfer ratio specification (2000% minimum), providing superior gain characteristics. PS2802-1-K-A provides equivalent performance with REACH compliance notification.

PS2802-1-M-A is suitable for applications requiring controlled current transfer ratio range (200% to 1000% @ 1mA), offering design flexibility for gain-sensitive circuits.

PS2802-1-A carries Not For New Designs status and should be used only for legacy system maintenance where Active alternatives are unavailable.

All substitute parts maintain the operating temperature range of -55°C to 100°C, which exceeds the original OPIA406CTUE specification of -30°C to 100°C, providing enhanced thermal performance.

Frequently Asked Questions (FAQ)

Q: Can PS2802 series parts directly replace OPIA406CTUE in existing designs?

A: Yes. All PS2802 variants maintain identical isolation voltage (2500Vrms), output configuration (single-channel Darlington), package geometry (4-SOIC), and electrical ratings (40V maximum output, 90mA maximum current). Pin-to-pin compatibility is confirmed.

Q: What is the difference between PS2802-1-F3-K-A and PS2802-1-K-A?

A: Both parts are electrically equivalent with 2000% minimum current transfer ratio and Active product status. PS2802-1-K-A carries REACH Affected designation, while PS2802-1-F3-K-A is REACH Unaffected. Selection depends on supply chain and regulatory requirements.

Q: Why does PS2802-1-M-A specify both minimum and maximum current transfer ratio?

A: PS2802-1-M-A is binned for a controlled range (200% to 1000% @ 1mA), allowing designers to select parts with predictable gain characteristics. This is suitable for applications requiring tighter current transfer ratio control compared to single-specification variants.

Q: Is the extended operating temperature range (-55°C to 100°C) of PS2802 variants significant?

A: The PS2802 series extends the lower temperature limit from -30°C to -55°C, providing enhanced performance in cold environment applications. This is a functional improvement over the original OPIA406CTUE specification.

Q: What is the inventory status for these substitutes?

A: PS2802-1-A: 1772 units; PS2802-1-F3-K-A: 903 units; PS2802-1-K-A: 915 units; PS2802-1-M-A: 951 units. All variants are in stock as new original components.

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