ZTX712 Equivalent & Substitute Parts

Part Overview

The ZTX712 is a PNP Darlington bipolar junction transistor manufactured by Diodes Incorporated, designed for through-hole applications in the E-Line (TO-92 compatible) package. This device operates at a maximum collector current of 800 mA with a collector-emitter breakdown voltage of 60 V and a maximum power dissipation of 1 W. The ZTX712 is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the through-hole E-Line package while meeting or exceeding the electrical performance specifications of the original device.

Substiute Parts

ZTX712

Diodes IncorporatedIn Stock: 1567ZTX712 Datasheet

Current PartRFQ

ZTX705

Diodes IncorporatedIn Stock: 1616ZTX705 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZTX712 is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Compatibility Criteria:

• Transistor configuration: PNP - Darlington topology
• Package type: E-Line-3 (TO-92 compatible) through-hole mounting
• Operating temperature range: -55°C to 200°C (TJ)
• Maximum power dissipation: 1 W

Electrical Performance Allowances: Substitute parts must support the ZTX712 application requirements. The ZTX712 operates at a maximum collector current of 800 mA and collector-emitter breakdown voltage of 60 V. Substitute devices may exceed these specifications, provided they maintain the same package footprint and pin configuration. Higher voltage ratings, increased current capacity, and improved frequency response do not preclude substitution when the physical form factor and thermal characteristics remain compatible.

Compliance Considerations: The ZTX712 is RoHS non-compliant and obsolete. Substitute parts with active product status and RoHS compliance are preferred for new designs and long-term availability assurance.

Parameter Comparison

Engineering Selection Recommendations

The ZTX705 is a direct substitute for the ZTX712 based on package compatibility, thermal operating range, and transistor topology. Both devices utilize the E-Line-3 through-hole package and support the identical -55°C to 200°C operating temperature range.

The ZTX705 provides enhanced electrical performance specifications relative to the ZTX712. The ZTX705 supports a maximum collector current of 1 A compared to the ZTX712's 800 mA, and offers a collector-emitter breakdown voltage of 120 V versus 60 V. These increased ratings provide design margin for applications originally specified for the ZTX712.

The ZTX705 holds active product status with ROHS3 compliance, addressing the obsolescence and regulatory limitations of the ZTX712. For new designs and production continuity, the ZTX705 is the appropriate selection. Existing designs utilizing the ZTX712 may transition to the ZTX705 without modification to the printed circuit board layout or mechanical assembly, provided that circuit operation remains within the ZTX705's electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can the ZTX705 be used as a direct replacement for the ZTX712 without circuit modifications?

A: Yes. Both devices share identical E-Line-3 through-hole package geometry and pin configuration. The ZTX705 operates within the same temperature range (-55°C to 200°C) and maintains the same 1 W power dissipation rating. No printed circuit board layout changes are required.

Q: What are the key electrical differences between the ZTX712 and ZTX705?

A: The ZTX705 provides higher voltage and current ratings. The ZTX705 supports 120 V collector-emitter breakdown voltage and 1 A maximum collector current, compared to the ZTX712's 60 V and 800 mA specifications. The ZTX705 also includes a specified transition frequency of 160 MHz. These enhancements do not prevent substitution; they provide additional design margin.

Q: Why is the ZTX712 classified as obsolete?

A: The ZTX712 is no longer in active production. The ZTX705 serves as the active replacement in the Diodes Incorporated product portfolio, offering improved specifications and regulatory compliance.

Q: Does the ZTX705 meet current regulatory requirements?

A: Yes. The ZTX705 is ROHS3 compliant, meeting current environmental and regulatory standards. The ZTX712 is RoHS non-compliant and does not meet modern regulatory requirements for new product designs.

Q: Are there any performance limitations when substituting the ZTX705 for the ZTX712?

A: No performance limitations exist for applications within the ZTX712's original specifications. The ZTX705's higher voltage and current ratings ensure compatibility with all ZTX712 applications. Circuit operation must remain within the ZTX705's electrical specifications.

Q: What is the difference in DC current gain between these devices?

A: The ZTX712 specifies a minimum DC current gain (hFE) of 10000 at 500 mA and 5 V. The ZTX705 specifies a minimum hFE of 3000 at 1 A and 5 V. The ZTX712 exhibits higher current gain at lower collector current levels. For applications sensitive to current gain characteristics, circuit performance should be verified against the ZTX705's specifications.

Q: Can the ZTX712 be used in new designs?

A: No. The ZTX712 is obsolete and RoHS non-compliant. New designs must utilize the ZTX705 or equivalent active alternatives to ensure long-term component availability and regulatory compliance.