FMMT718QTA Equivalent & Substitute Parts

Part Overview

The FMMT718QTA is an active-status PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for low-saturation applications in surface-mount configurations. This device operates at 20 V collector-emitter breakdown voltage with a maximum collector current of 1.5 A and is qualified to AEC-Q101 automotive standards. The part is supplied in Tape & Reel packaging with SOT-23 (Type DN) surface-mount package format.

Substitute parts are identified when electrical and mechanical parameters remain within the specified operating ranges, allowing direct functional replacement in circuit designs while maintaining performance characteristics and compliance requirements.

Substiute Parts

FMMT718QTA

Diodes IncorporatedIn Stock: 1038FMMT718QTA Datasheet

Current PartRFQ

FMMT718TA

Diodes IncorporatedIn Stock: 26170FMMT718TA Datasheet

Parametric EquivalentRFQ

FMMT718TC

Diodes IncorporatedIn Stock: 10910FMMT718TC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FMMT718QTA are identified based on electrical and mechanical parameter equivalence. The substitution logic is based on the following criteria:

Electrical Parameters (Must Match):

• Transistor Type: PNP
• Current - Collector (Ic) (Max): 1.5 A
• Voltage - Collector Emitter Breakdown (Max): 20 V
• Vce Saturation (Max) @ Ib, Ic: 220mV @ 50mA, 1.5A
• Current - Collector Cutoff (Max): 100nA
• DC Current Gain (hFE) (Min) @ Ic, Vce: 300 @ 100mA, 2V
• Power - Max: 625 mW
• Frequency - Transition: 180MHz
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Must Match):

• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Product Status: Active

Substitute parts may differ in packaging format (Cut Tape vs. Tape & Reel) without affecting functional equivalence, as both formats contain identical die and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts—FMMT718TA and FMMT718TC—maintain full electrical and mechanical equivalence to the FMMT718QTA. Selection between these parts is determined by packaging and supply requirements rather than functional performance.

FMMT718QTA (Original Part): Supplied in Tape & Reel format with SOT-23 (Type DN) package designation. Suitable for high-volume automated assembly operations requiring continuous reel feeding.

FMMT718TA (Substitute): Supplied in Cut Tape and Digi-Reel® formats with SOT-23-3 package designation. Appropriate for lower-volume applications, prototype builds, or operations utilizing cut-tape handling equipment.

FMMT718TC (Substitute): Supplied in Tape & Reel format with SOT-23-3 package designation. Functionally identical to the original part with equivalent reel packaging for automated assembly.

All three parts are active-status products manufactured by Diodes Incorporated, maintain ROHS3 compliance, and carry MSL 1 (Unlimited) moisture sensitivity classification. Selection among these equivalents does not compromise circuit performance, reliability, or regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can FMMT718TA be used as a direct replacement for FMMT718QTA in production assembly?

A: Yes. FMMT718TA is electrically and mechanically equivalent to FMMT718QTA. The primary difference is packaging format: FMMT718TA is supplied in Cut Tape and Digi-Reel® formats, while FMMT718QTA is supplied in Tape & Reel. Both contain identical die and electrical characteristics. Assembly equipment compatibility with the packaging format must be verified for your specific production line.

Q: What is the difference between SOT-23 (Type DN) and SOT-23-3 package designations?

A: Both designations refer to the same three-lead surface-mount package with identical physical dimensions and pin configuration. The designation difference reflects supplier package nomenclature variations. Mechanical compatibility and PCB footprints are identical.

Q: Are all three parts suitable for automotive applications?

A: The FMMT718QTA carries AEC-Q101 automotive qualification. FMMT718TA and FMMT718TC do not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 certification, FMMT718QTA is the specified part. For non-automotive applications, all three parts are functionally equivalent.

Q: What is the inventory availability difference between these parts?

A: FMMT718QTA has 929 pieces in stock, FMMT718TA has 26,100 pieces in stock, and FMMT718TC has 10,879 pieces in stock. Availability should be confirmed with your supplier for current stock levels and lead times.

Q: Can these parts be intermixed in the same circuit design?

A: Yes. All three parts maintain identical electrical parameters, operating temperature ranges, and power ratings. Circuit designs using any of these part numbers will perform identically. PCB footprints and assembly processes must accommodate the specific packaging format selected.

Q: What compliance certifications apply to all substitute parts?

A: All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity classification. All parts are active-status products. FMMT718QTA additionally carries AEC-Q101 automotive qualification.