ST1802FX Equivalent & Substitute Parts

Part Overview

The ST1802FX is a Bipolar (BJT) NPN Transistor manufactured by STMicroelectronics, rated for 600 V collector-emitter breakdown voltage and 10 A maximum collector current in a Through Hole ISOWATT-218FX package. This component is designed for high-voltage switching and amplification applications requiring 60 W power dissipation capability.

The ST1802FX is classified as Obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and redesign requirements for systems utilizing this transistor. Substitute parts must maintain functional compatibility within the electrical and mechanical constraints of the original application.

Substiute Parts

ST1802FX

STMicroelectronicsIn Stock: 1154ST1802FX Datasheet

Current PartRFQ

ST1510FX

STMicroelectronicsIn Stock: 2194ST1510FX Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST1802FX are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Primary Compatibility Criteria:

• Transistor Type: NPN (must match)
• Package / Case: ISOWATT218FX (must match for mechanical fit)
• Mounting Type: Through Hole (must match)
• Voltage - Collector Emitter Breakdown (Max): Must equal or exceed 600 V
• Current - Collector (Ic) (Max): Must equal or exceed 10 A
• Power - Max: Must equal or exceed 60 W
• Operating Temperature (TJ): Must equal or exceed 150°C
• RoHS Status: ROHS3 Compliant (regulatory requirement)

The ST1510FX meets all primary compatibility criteria and is classified as Active, providing a viable substitute for the obsolete ST1802FX.

Parameter Comparison

Engineering Selection Recommendations

The ST1510FX is a direct substitute for the ST1802FX based on the following engineering criteria:

Electrical Compatibility: The ST1510FX exceeds all maximum electrical ratings of the ST1802FX. The collector-emitter breakdown voltage is increased from 600 V to 750 V, maximum collector current is increased from 10 A to 12 A, and maximum power dissipation is increased from 60 W to 62 W. These enhancements provide superior performance margins within the same application envelope.

Mechanical Compatibility: Both components utilize the identical ISOWATT218FX package and Through Hole mounting type, ensuring direct physical compatibility with existing printed circuit board layouts and assembly processes.

Regulatory Compliance: Both the ST1802FX and ST1510FX are ROHS3 Compliant and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited), satisfying regulatory and environmental requirements.

Product Status: The ST1510FX is classified as Active, ensuring ongoing availability and supply chain continuity compared to the Obsolete status of the ST1802FX.

Frequently Asked Questions (FAQ)

Q: Can the ST1510FX be used as a direct replacement for the ST1802FX in existing designs?

A: Yes. The ST1510FX is mechanically and electrically compatible with the ST1802FX. Both components share the identical ISOWATT218FX package and Through Hole mounting configuration. The ST1510FX provides equal or superior electrical performance across all rated parameters.

Q: What are the key differences between the ST1802FX and ST1510FX?

A: The ST1510FX provides higher voltage rating (750 V vs. 600 V), higher current rating (12 A vs. 10 A), and higher power dissipation (62 W vs. 60 W). The ST1510FX also exhibits lower collector-emitter saturation voltage (2 V vs. 5 V at specified conditions) and higher DC current gain (6.5 vs. 4 at specified conditions). The ST1510FX is Active, while the ST1802FX is Obsolete.

Q: Are there any package or mounting differences between these components?

A: No. Both the ST1802FX and ST1510FX utilize the ISOWATT218FX package with Through Hole mounting. No circuit board modifications or assembly process changes are required for substitution.

Q: What is the significance of the Obsolete status of the ST1802FX?

A: Obsolete status indicates that the ST1802FX is no longer manufactured or supported by STMicroelectronics. The ST1510FX, classified as Active, is currently manufactured and available through authorized distribution channels, ensuring long-term supply availability.

Q: Do both components meet the same regulatory and environmental standards?

A: Yes. Both the ST1802FX and ST1510FX are ROHS3 Compliant, REACH Unaffected, and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited). Both components satisfy identical regulatory and environmental requirements.

Q: What is the impact of the lower saturation voltage in the ST1510FX?

A: The ST1510FX exhibits lower collector-emitter saturation voltage (2 V at 1.5 A base current and 6 A collector current, compared to 5 V at 800 mA base current and 4 A collector current in the ST1802FX). This characteristic indicates improved switching efficiency and reduced power dissipation during saturation operation.