ZTX758STOB Equivalent & Substitute Parts

Part Overview

The ZTX758STOB is a Bipolar (BJT) Transistor manufactured by Diodes Incorporated, classified as a PNP-type transistor rated for 400 V collector-emitter breakdown voltage and 500 mA maximum collector current. This component is designed for through-hole mounting in E-Line (TO-92 compatible) packaging with a maximum power dissipation of 1 W and transition frequency of 50 MHz.

The ZTX758STOB carries an Obsolete product status. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and maintenance applications.

Substiute Parts

ZTX758STOB

Diodes IncorporatedIn Stock: 921ZTX758STOB Datasheet

Current PartRFQ

ZTX758STZ

Diodes IncorporatedIn Stock: 10111ZTX758STZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZTX758STOB is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters (Critical for Functional Equivalence):

• Transistor Type: PNP
• Maximum Collector Current (Ic): 500 mA
• Maximum Collector-Emitter Breakdown Voltage: 400 V
• Vce Saturation characteristics: 500mV @ 10mA, 100mA
• Maximum Collector Cutoff Current: 100 nA
• DC Current Gain (hFE): 40 @ 200mA, 10V
• Maximum Power Dissipation: 1 W
• Transition Frequency: 50 MHz
• Operating Temperature Range: -55°C to 200°C (TJ)

Mechanical Parameters (Critical for Physical Compatibility):

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

Compliance Parameters:

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

The substitute part ZTX758STZ meets all electrical and mechanical requirements for direct substitution. The primary distinction is packaging format: ZTX758STZ is supplied in Tape & Box (TB) format, whereas the ZTX758STOB is supplied in standard packaging. Both parts share identical electrical specifications and are manufactured by Diodes Incorporated under the same base product number ZTX758.

Parameter Comparison

Engineering Selection Recommendations

The ZTX758STZ is a direct electrical and mechanical equivalent to the ZTX758STOB. Both parts are manufactured by Diodes Incorporated and share identical electrical specifications, operating characteristics, and physical dimensions.

Product Status Consideration: The ZTX758STOB is classified as Obsolete, while the ZTX758STZ maintains Active product status. The ZTX758STZ is the current production equivalent and is recommended for new designs and ongoing production requirements.

Compliance Alignment: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental compatibility across applications.

Packaging Distinction: The ZTX758STZ is supplied in Tape & Box (TB) format, which is standard for high-volume production environments. The original ZTX758STOB packaging format is no longer the primary distribution method. This packaging difference does not affect electrical performance or mechanical compatibility in through-hole applications.

Inventory Availability: The ZTX758STZ demonstrates significantly higher inventory availability (10,100 pieces) compared to the ZTX758STOB (844 pieces), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the ZTX758STZ be used as a direct replacement for the ZTX758STOB in existing designs?

A: Yes. The ZTX758STZ is electrically and mechanically equivalent to the ZTX758STOB. All electrical parameters, operating characteristics, and physical dimensions are identical. The component can be substituted without circuit modification or performance impact.

Q: What is the difference between the ZTX758STOB and ZTX758STZ?

A: The primary difference is packaging format. The ZTX758STOB is supplied in standard packaging, while the ZTX758STZ is supplied in Tape & Box (TB) format. Both parts share the same base product number (ZTX758), manufacturer (Diodes Incorporated), and identical electrical specifications.

Q: Why is the ZTX758STOB listed as Obsolete?

A: The ZTX758STOB has been superseded by the ZTX758STZ, which is the current production equivalent. The Obsolete status indicates that the original part number is no longer actively manufactured, though existing inventory may remain available.

Q: Are there any thermal or operating condition differences between these parts?

A: No. Both parts operate across the identical temperature range (-55°C to 200°C junction temperature) and maintain the same maximum power dissipation (1 W), transition frequency (50 MHz), and all electrical characteristics.

Q: Is the E-Line (TO-92 compatible) package the same for both parts?

A: Yes. Both the ZTX758STOB and ZTX758STZ use the E-Line-3 package with formed leads, which is compatible with standard TO-92 footprints. Physical dimensions and lead spacing are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, carry Moisture Sensitivity Level 1 (Unlimited), and are REACH unaffected. Compliance certifications are identical.

Q: Which part should be selected for new production designs?

A: The ZTX758STZ should be selected for new designs. It maintains Active product status, demonstrates higher inventory availability, and is the current production equivalent to the Obsolete ZTX758STOB.