Equivalent & Substitute Parts for FC903-TR-E

Part Overview

The FC903-TR-E is a diode array rectifier manufactured by onsemi, featuring three independent 80V, 100mA diodes in a surface mount SC-74 (SOT-457) package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The part operates with a maximum forward voltage of 1.2V at 100mA and includes reverse recovery time of 4 nanoseconds, suitable for general-purpose rectification applications in small-signal circuits.

Substiute Parts

FC903-TR-E

onsemiIn Stock: 1191FC903-TR-E Datasheet

Current PartRFQ

HN2D02FUTW1T1G

onsemiIn Stock: 41321HN2D02FUTW1T1G Datasheet

SimilarRFQ

IMN10FHT108

Rohm SemiconductorIn Stock: 3475IMN10FHT108 Datasheet

Parametric EquivalentRFQ

IMN10T108

Rohm SemiconductorIn Stock: 21046IMN10T108 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FC903-TR-E is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Diode configuration: 3 independent diodes
• Voltage rating: 80V DC reverse maximum
• Current rating: 100mA average rectified per diode
• Forward voltage: 1.2V maximum at 100mA
• Technology: Standard rectifier diode
• Speed classification: Small signal, any speed

Package Compatibility Considerations: Substitutes are grouped into two categories based on package type. The FC903-TR-E uses SC-74 (SOT-457) packaging. Substitutes maintaining identical package geometry enable direct board-level replacement. Substitutes with alternative surface mount packages (SC-88, SOT-363) require PCB layout modification but maintain full electrical equivalence.

Compliance and Status: The FC903-TR-E is obsolete. Active substitutes are prioritized based on product status (active vs. obsolete), regulatory compliance (RoHS3), and automotive qualification where applicable.

Parameter Comparison

Engineering Selection Recommendations

Direct Package Replacement (Recommended for Existing Designs):

IMN10T108 and IMN10FHT108 (Rohm Semiconductor) maintain identical SC-74 (SOT-457) package geometry to the FC903-TR-E, enabling direct PCB substitution without layout modification. Both parts are active products with ROHS3 compliance. IMN10FHT108 includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. IMN10T108 is available in Cut Tape and Digi-Reel packaging formats.

Alternative Package Substitution (Requires PCB Redesign):

HN2D02FUTW1T1G (onsemi) provides electrical equivalence with identical voltage, current, and forward voltage specifications. This part uses SC-88 (SOT-363) packaging, which differs from the original SC-74 footprint and requires PCB layout modification. HN2D02FUTW1T1G is an active product with ROHS3 compliance and offers higher inventory availability (41,270 units in stock).

Thermal Performance Consideration:

All substitute parts feature maximum junction temperatures of 150°C, compared to 125°C for the FC903-TR-E. This represents improved thermal capability and does not restrict substitution in existing applications.

Reverse Leakage Improvement:

Substitute parts demonstrate reduced reverse leakage current (100 nA) compared to the original specification (500 nA @ 80V), indicating improved device performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can IMN10T108 and IMN10FHT108 be used as direct replacements for FC903-TR-E without PCB modification?

A: Yes. Both Rohm parts maintain the SC-74 (SOT-457) package geometry identical to the FC903-TR-E. Electrical parameters (80V rating, 100mA current, 1.2V forward voltage) are equivalent. No PCB layout changes are required.

Q: What is the difference between IMN10T108 and IMN10FHT108?

A: Both parts are electrically identical with matching electrical specifications and SC-74 packaging. IMN10FHT108 includes AEC-Q101 automotive qualification and is supplied in standard Tape & Reel packaging. IMN10T108 is supplied in Cut Tape and Digi-Reel formats. Selection depends on packaging requirements and automotive qualification necessity.

Q: Why does HN2D02FUTW1T1G use a different package (SC-88) than the original FC903-TR-E (SC-74)?

A: HN2D02FUTW1T1G is an onsemi product that maintains full electrical equivalence but uses SC-88 (SOT-363) packaging. This package change requires PCB redesign. This substitute is appropriate for new designs where package footprint flexibility exists.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. HN2D02FUTW1T1G, IMN10FHT108, and IMN10T108 are all ROHS3 compliant. The original FC903-TR-E RoHS status was not specified.

Q: What is the significance of the reverse leakage current difference between FC903-TR-E (500 nA) and the substitutes (100 nA)?

A: The lower reverse leakage current in substitute parts indicates improved device performance and reduced off-state current. This does not restrict substitution and represents a performance enhancement for the application.

Q: Which substitute part has the highest inventory availability?

A: HN2D02FUTW1T1G has the highest inventory with 41,270 units in stock, followed by IMN10T108 with 21,023 units, and IMN10FHT108 with 3,400 units.

Q: Is automotive qualification required for my application?

A: Automotive qualification (AEC-Q101) is required only for applications subject to automotive industry standards. IMN10FHT108 is the only substitute with AEC-Q101 qualification. For non-automotive applications, all three substitutes are suitable.

Q: Can the FC903-TR-E still be sourced as an active product?

A: No. The FC903-TR-E is classified as obsolete. Active substitutes must be used for new designs and ongoing production. Existing inventory of 1,110 units may be available through component distributors, but long-term availability is not assured.