ZTX751 Equivalent & Substitute Parts

Part Overview

The ZTX751 is an active PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for general-purpose switching and amplification applications. This through-hole component operates at maximum collector current of 2 A and collector-emitter breakdown voltage of 60 V, with a maximum power dissipation of 1 W. The ZTX751 is packaged in E-Line (TO-92 compatible) configuration and maintains RoHS3 compliance with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified for applications requiring compatible electrical and mechanical characteristics or alternative packaging and inventory availability.

Substiute Parts

ZTX751

Diodes IncorporatedIn Stock: 5697ZTX751 Datasheet

Current PartRFQ

KSA708YBU

Fairchild SemiconductorIn Stock: 91057KSA708YBU Datasheet

MFR RecommendedRFQ

MPS751

Fairchild SemiconductorIn Stock: 1377MPS751 Datasheet

MFR RecommendedRFQ

MPS751-D26Z

onsemiIn Stock: 35297MPS751-D26Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ZTX751 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

• Transistor Type: PNP configuration
• Voltage - Collector Emitter Breakdown (Max): 60 V minimum
• Current - Collector (Ic) (Max): 2 A or greater
• Vce Saturation: 500mV @ 200mA, 2A
• Current - Collector Cutoff (Max): 100nA (ICBO)
• Mounting Type: Through Hole
• Package Compatibility: TO-92-3 or E-Line equivalent

Group 1: Full Electrical and Mechanical Equivalents Parts MPS751 and MPS751-D26Z maintain identical maximum collector current (2 A), collector-emitter breakdown voltage (60 V), and saturation voltage specifications. Both are packaged in TO-92-3 configuration with through-hole mounting. These parts differ in packaging format (bulk versus cut tape) and manufacturer (Fairchild Semiconductor versus onsemi).

Group 2: Reduced Current Rating Substitute Part KSA708YBU is classified as a substitute with reduced maximum collector current (700 mA versus 2 A). This part maintains the 60 V collector-emitter breakdown voltage and through-hole TO-92-3 packaging. The reduced current rating restricts its use to applications where collector current does not exceed 700 mA.

Parameter Comparison

Engineering Selection Recommendations

MPS751 and MPS751-D26Z Selection

The MPS751 and MPS751-D26Z are direct electrical equivalents to the ZTX751, maintaining identical maximum collector current (2 A) and collector-emitter breakdown voltage (60 V) specifications. Both parts are active products with through-hole TO-92-3 packaging compatible with E-Line footprints. The MPS751-D26Z variant, manufactured by onsemi, carries ROHS3 compliance certification and is available in cut tape packaging with 35,200 units in stock. The standard MPS751 variant is available from Fairchild Semiconductor in bulk packaging with 1,300 units in stock. Selection between these two should be based on packaging requirements (cut tape versus bulk) and inventory availability.

KSA708YBU Selection

The KSA708YBU is a substitute part suitable only for applications where maximum collector current does not exceed 700 mA. This part maintains the 60 V collector-emitter breakdown voltage and through-hole TO-92-3 packaging. The KSA708YBU exhibits higher saturation voltage (700mV @ 50mA, 500mA) compared to the ZTX751 (500mV @ 200mA, 2A), resulting in increased power dissipation in saturation conditions. The KSA708YBU is available from Fairchild Semiconductor with 91,001 units in stock.

Compliance and Certification

The ZTX751 and MPS751-D26Z both maintain ROHS3 compliance. All substitute parts are classified as REACH Unaffected. Selection should prioritize parts with matching compliance certifications for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the KSA708YBU replace the ZTX751 in all applications?

A: No. The KSA708YBU has a maximum collector current rating of 700 mA, compared to the ZTX751's 2 A rating. The KSA708YBU is suitable only for applications where collector current does not exceed 700 mA. Additionally, the KSA708YBU exhibits higher saturation voltage (700mV versus 500mV), resulting in increased power dissipation.

Q: What is the difference between MPS751 and MPS751-D26Z?

A: Both parts are electrically identical with 2 A maximum collector current and 60 V collector-emitter breakdown voltage. The primary differences are manufacturer (Fairchild Semiconductor versus onsemi), packaging format (bulk versus cut tape), and RoHS certification status. The MPS751-D26Z carries ROHS3 compliance certification.

Q: Are the ZTX751 and MPS751 pin-compatible?

A: Yes. Both parts use through-hole TO-92-3 packaging with identical pin configurations. The ZTX751 E-Line package is compatible with standard TO-92-3 footprints.

Q: What are the key electrical differences between the ZTX751 and its substitutes?

A: The ZTX751 operates at higher maximum power dissipation (1 W versus 625 mW for MPS751/MPS751-D26Z) and higher transition frequency (140 MHz versus 75 MHz). The ZTX751 also supports higher operating temperature (200°C versus 150°C). The KSA708YBU has reduced collector current (700 mA) and transition frequency (50 MHz).

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

A: For new designs requiring full electrical equivalence to the ZTX751, select either MPS751 or MPS751-D26Z. The MPS751-D26Z is recommended for applications requiring ROHS3 compliance certification. The KSA708YBU should be selected only when collector current requirements do not exceed 700 mA and higher saturation voltage is acceptable.

Q: Are all substitute parts available in the same packaging options?

A: No. The ZTX751 is available in bulk E-Line packaging. The MPS751 is available in bulk packaging. The MPS751-D26Z is available in cut tape (CT) packaging. The KSA708YBU is available in bulk packaging. Packaging selection should be based on procurement and assembly requirements.