4N22ATX Optoisolator Equivalent & Substitute Parts

Part Overview

The 4N22ATX is a 1000VDC optoisolator transistor with base output in a TO-78-6 metal can package, manufactured by TT Electronics/Optek Technology. This component features a single isolation channel with 25% minimum current transfer ratio and 50mA output current capability. The 4N22ATX is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

4N22ATX

TT Electronics/Optek TechnologyIn Stock: 9244N22ATX Datasheet

Current PartRFQ

JANTX4N22A

TT Electronics/Optek TechnologyIn Stock: 905JANTX4N22A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 4N22ATX is determined by the following critical parameters that must remain constant or compatible:

• Isolation Voltage: 1000VDC minimum
• Number of Channels: 1 channel
• Output Type: Transistor with Base configuration
• Package / Case: TO-78-6 Metal Can (through-hole mounting)
• Current Transfer Ratio: Minimum 25% @ 10mA
• Output Current Capability: 50mA per channel
• Vce Saturation: 300mV maximum
• Input Type: DC

The JANTX4N22A qualifies as a direct substitute based on these parameters. Both parts share identical isolation voltage, channel configuration, output type, package format, and core electrical specifications. The JANTX4N22A maintains compatibility with existing circuit designs while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The JANTX4N22A is the qualified substitute for the obsolete 4N22ATX. Selection is based on the following engineering criteria:

Product Status: The 4N22ATX is obsolete, while JANTX4N22A maintains active product status, ensuring continued availability and manufacturer support.

Electrical Compatibility: Both parts maintain identical isolation voltage (1000VDC), current transfer ratio (25% @ 10mA), output current (50mA), and saturation voltage (300mV). The JANTX4N22A provides a higher maximum output voltage rating (40V vs. 35V), which is compatible with existing designs.

Package and Mounting: Both components use the TO-78-6 metal can package with through-hole mounting, ensuring direct mechanical and electrical compatibility in existing PCB layouts.

Compliance and Certifications: The JANTX4N22A is ROHS3 compliant, whereas the 4N22ATX is RoHS non-compliant. Both parts are REACH unaffected and carry EAR99 ECCN classification.

Operating Temperature Range: The JANTX4N22A operates from -55°C to 125°C, compared to the 4N22ATX range of -65°C to 125°C. Applications requiring operation below -55°C must evaluate this narrower range against specific system requirements.

Frequently Asked Questions (FAQ)

Q: Can JANTX4N22A be used as a direct replacement for 4N22ATX in existing designs?

A: Yes. Both parts share identical isolation voltage, channel configuration, output type, package format, and core electrical specifications. The JANTX4N22A provides equivalent or superior electrical performance with active product status.

Q: What are the key differences between 4N22ATX and JANTX4N22A?

A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), maximum output voltage (35V vs. 40V), and operating temperature range (-65°C to 125°C vs. -55°C to 125°C). All core isolation and switching parameters remain identical.

Q: Does the higher output voltage rating of JANTX4N22A affect circuit compatibility?

A: No. A higher maximum output voltage rating is compatible with designs specified for lower voltages. The JANTX4N22A can be used in any application designed for the 4N22ATX without circuit modification.

Q: Are there packaging or mounting differences between these parts?

A: No. Both parts use the TO-78-6 metal can package with through-hole mounting. PCB layouts and socket compatibility remain identical.

Q: What is the significance of ROHS3 compliance on JANTX4N22A?

A: ROHS3 compliance indicates the JANTX4N22A meets current environmental and hazardous substance restrictions. This is relevant for applications subject to regulatory compliance requirements or customer specifications mandating RoHS compliance.

Q: Can JANTX4N22A be used in applications requiring the full -65°C to 125°C temperature range?

A: No. The JANTX4N22A operates from -55°C to 125°C. Applications requiring operation below -55°C must confirm that the narrower temperature range meets system specifications before substitution.