KSP94TA Equivalent & Substitute Parts

Part Overview

The KSP94TA is a Bipolar (BJT) Transistor with PNP configuration manufactured by onsemi. This component is rated for 400 V collector-emitter breakdown voltage with a maximum collector current of 300 mA and 625 mW power dissipation in a Through Hole TO-92-3 package. The KSP94TA is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified voltage, current, and power parameters while accommodating available packaging options.

Substiute Parts

KSP94TA

onsemiIn Stock: 2021KSP94TA Datasheet

Current PartRFQ

ZTX758STZ

Diodes IncorporatedIn Stock: 10111ZTX758STZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSP94TA is determined by equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

• Transistor Type: PNP configuration required
• Voltage - Collector Emitter Breakdown: Minimum 400 V
• Current - Collector (Ic) (Max): Minimum 300 mA
• Power - Max: Minimum 625 mW
• Mounting Type: Through Hole
• Package Compatibility: TO-92-3 or TO-92 compatible form factor

The ZTX758STZ qualifies as a substitute part because it meets or exceeds all critical electrical parameters while maintaining Through Hole mounting and TO-92 compatible packaging. The substitute part demonstrates superior electrical performance in collector current capacity (500 mA versus 300 mA) and power dissipation (1 W versus 625 mW), with equivalent voltage rating (400 V) and compatible saturation characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ZTX758STZ is a direct substitute for the obsolete KSP94TA in applications requiring PNP Bipolar (BJT) Transistor functionality at 400 V collector-emitter breakdown voltage with 300 mA minimum collector current capacity.

Substitution Basis:

The ZTX758STZ maintains electrical equivalence across all critical parameters while offering enhanced performance margins. Both components are ROHS3 compliant, REACH unaffected, and feature unlimited moisture sensitivity classification (MSL 1), ensuring regulatory and environmental compatibility.

The substitute part is classified as Active product status, providing long-term availability and supply chain stability compared to the obsolete KSP94TA. The ZTX758STZ demonstrates superior electrical characteristics including higher maximum collector current (500 mA), increased power dissipation capability (1 W), improved saturation voltage performance (500 mV), and extended operating temperature range (−55°C to 200°C).

Package compatibility is maintained through E-Line-3 form factor with TO-92 compatible formed leads, enabling direct mechanical substitution in Through Hole mounting applications without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can the ZTX758STZ directly replace the KSP94TA in existing circuit designs?

A: Yes. The ZTX758STZ meets all electrical requirements for the KSP94TA application. Both components feature identical 400 V collector-emitter breakdown voltage, PNP configuration, and Through Hole mounting. The substitute part provides equal or superior performance across all specified parameters. Physical form factor compatibility (TO-92 compatible leads) permits direct board-level substitution.

Q: What are the key electrical differences between these components?

A: The ZTX758STZ provides enhanced electrical performance: maximum collector current of 500 mA versus 300 mA, power dissipation of 1 W versus 625 mW, and improved saturation voltage of 500 mV versus 750 mV. Operating temperature range extends to 200°C compared to 150°C maximum for the KSP94TA. These differences represent performance improvements suitable for applications with higher current or thermal demands.

Q: Are there packaging considerations for substitution?

A: Both components utilize Through Hole mounting with compatible three-lead configurations. The KSP94TA uses TO-92-3 packaging while the ZTX758STZ employs E-Line-3 form factor specified as TO-92 compatible. Formed lead geometry and spacing are compatible with standard TO-92 circuit board footprints, eliminating packaging-related substitution barriers.

Q: What compliance certifications apply to the substitute part?

A: The ZTX758STZ carries ROHS3 compliance and REACH unaffected status, matching the regulatory classification of the KSP94TA. Moisture sensitivity level remains at MSL 1 (unlimited), indicating no special handling requirements during storage or assembly.

Q: Why is the KSP94TA classified as obsolete?

A: The KSP94TA is designated obsolete by the manufacturer onsemi. The ZTX758STZ from Diodes Incorporated is classified as Active product, ensuring continued availability, manufacturing support, and supply chain reliability for new designs and production requirements.

Q: How do the DC current gain specifications compare?

A: The KSP94TA specifies minimum DC current gain (hFE) of 50 at 10 mA collector current and 10 V collector-emitter voltage. The ZTX758STZ specifies minimum DC current gain of 40 at 200 mA collector current and 10 V collector-emitter voltage. The substitute part maintains adequate current gain performance across its extended current operating range.