ZTX718STOA Equivalent & Substitute Parts

Part Overview

The ZTX718STOA is a Bipolar (BJT) Transistor, PNP type, manufactured by Diodes Incorporated. This component is designed for through-hole applications with an E-Line (TO-92 compatible) package configuration. The device operates at a maximum collector current of 2.5 A, collector-emitter breakdown voltage of 20 V, and maximum power dissipation of 1 W, with a transition frequency of 180 MHz.

The ZTX718STOA is classified as an obsolete product. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and maintenance applications. The substitute part identified maintains identical electrical specifications while offering improved availability through active product status.

Substiute Parts

ZTX718STOA

Diodes IncorporatedIn Stock: 778ZTX718STOA Datasheet

Current PartRFQ

ZTX718STZ

Diodes IncorporatedIn Stock: 4413ZTX718STZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZTX718STOA is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameters (Must Match Exactly):

• Transistor Type: PNP
• Maximum Collector Current (Ic): 2.5 A
• Maximum Collector-Emitter Breakdown Voltage: 20 V
• Vce Saturation: 260 mV @ 200 mA, 2.5 A
• Maximum Collector Cutoff Current: 100 nA
• Minimum DC Current Gain (hFE): 150 @ 2 A, 2 V
• Maximum Power Dissipation: 1 W
• Transition Frequency: 180 MHz
• Operating Temperature Range: -55°C to 200°C (TJ)

Mechanical Parameters (Must Match Exactly):

• Mounting Type: Through Hole
• Package / Case: E-Line-3, Formed Leads
• Supplier Device Package: E-Line (TO-92 compatible)

Compliance Parameters (Must Match Exactly):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The ZTX718STZ meets all substitution criteria and is identified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

The ZTX718STZ is a direct electrical and mechanical equivalent to the ZTX718STOA. Both components are manufactured by Diodes Incorporated and share identical specifications across all critical parameters: collector current, breakdown voltage, saturation characteristics, current gain, power rating, and transition frequency.

The primary distinction between these parts is product status and availability. The ZTX718STOA is classified as obsolete, while the ZTX718STZ maintains active product status with significantly higher inventory availability (4400 pieces in stock versus 685 pieces for the main part). Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

The ZTX718STZ is supplied in Tape & Box (TB) packaging, which is standard for active production components. The E-Line-3 package configuration with formed leads remains identical, ensuring mechanical compatibility in through-hole applications.

For new designs, repair operations, and production continuity, the ZTX718STZ is the appropriate selection due to its active product status and superior component availability.

Frequently Asked Questions (FAQ)

Q: Can the ZTX718STZ be used as a direct replacement for the ZTX718STOA in existing designs?

A: Yes. The ZTX718STZ is electrically and mechanically equivalent to the ZTX718STOA. All electrical parameters, including collector current, breakdown voltage, saturation characteristics, current gain, power dissipation, and transition frequency are identical. The through-hole E-Line-3 package configuration is the same, ensuring pin-for-pin compatibility and identical PCB footprint.

Q: What is the difference between the ZTX718STOA and ZTX718STZ?

A: The components are electrically identical. The primary differences are product status and packaging format. The ZTX718STOA is obsolete, while the ZTX718STZ is an active product. The ZTX718STZ is supplied in Tape & Box (TB) packaging, which is standard for active production components. The ZTX718STOA packaging type is not specified in available documentation.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both the ZTX718STOA and ZTX718STZ maintain identical compliance status: ROHS3 compliant, REACH unaffected, and Moisture Sensitivity Level 1 (unlimited). Both components are suitable for applications requiring regulatory compliance with these standards.

Q: What is the operating temperature range for the ZTX718STZ?

A: The operating temperature range is -55°C to 200°C (junction temperature, TJ). This range is identical to the ZTX718STOA and supports applications across industrial, automotive, and high-temperature environments.

Q: Is the E-Line package compatible with standard TO-92 footprints?

A: Yes. Both the ZTX718STOA and ZTX718STZ use the E-Line-3 package with formed leads, which is TO-92 compatible. This ensures compatibility with existing through-hole PCB designs and standard component insertion equipment.

Q: What is the maximum collector current rating?

A: The maximum collector current (Ic) for both the ZTX718STOA and ZTX718STZ is 2.5 A. This rating must not be exceeded in circuit design to ensure reliable component operation and prevent thermal damage.

Q: What is the transition frequency specification?

A: The transition frequency (fT) for both components is 180 MHz. This parameter defines the frequency at which the current gain drops to unity and is relevant for high-frequency switching and amplification applications.