QST3TR Equivalent & Substitute Parts Reference

Part Overview

QST3TR is a PNP bipolar junction transistor (BJT) manufactured by Rohm Semiconductor, classified under the Transistors, Bipolar (BJT) category. The device features a maximum collector current of 5 A and a maximum collector-emitter voltage of 30 V, suitable for surface-mount power switching applications. With its SOT-23-6 Thin (TSMT6, SC-95) package and active product status, QST3TR is widely used in power management systems. The process of identifying equivalent or substitute models such as PBSS5440D,115 is essential for ensuring supply chain flexibility and continuous manufacturing in the event of procurement challenges or when optimizing inventory.

Substiute Parts

QST3TR

Rohm SemiconductorIn Stock: 36835QST3TR Datasheet

Current PartRFQ

PBSS5440D,115

Nexperia USA Inc.In Stock: 5799PBSS5440D,115 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is determined exclusively by matching or exceeding the specific electrical and package parameters of QST3TR, as given:

• Transistor Type: PNP
• Current - Collector (Ic) (Max)
• Voltage - Collector Emitter Breakdown (Max)
• Vce Saturation (Max)
• Current - Collector Cutoff (Max)
• DC Current Gain (hFE) (Min)
• Power - Max
• Frequency - Transition
• Operating Temperature
• Mounting Type
• Package / Case
• RoHS and REACH Compliance
• Moisture Sensitivity Level (MSL)
• ECCN

These parameters define the fundamental interchangeability required for a direct engineering substitute in the “Transistors, Bipolar (BJT)” category.

Parameter Comparison

Engineering Selection Recommendations

Both QST3TR and PBSS5440D,115 are classified as “Active” status, are ROHS3 compliant, REACH unaffected, and assigned the same (unrestricted) Moisture Sensitivity Level (MSL 1). Their ECCN (EAR99) status aligns for unrestricted global commerce. The parameters in compliance and product status allow for consideration of PBSS5440D,115 as an alternative in qualified engineering designs.

Frequently Asked Questions (FAQ)

Q1: Which parameters are critical for selecting a substitute for QST3TR in Transistors, Bipolar (BJT) applications?
A1: Critical parameters include transistor type (PNP), maximum collector current, collector-emitter breakdown voltage, Vce saturation maximum, cutoff current, DC current gain, power dissipation, transition frequency, mounting type, package, RoHS and REACH compliance, and moisture sensitivity level.

Q2: Are there differences in package compatibility between QST3TR and PBSS5440D,115?
A2: QST3TR uses SOT-23-6 Thin (TSMT6, SC-95) while PBSS5440D,115 is supplied in SC-74 (SOT-457, 6-TSOP). Engineering evaluation is necessary for circuit board footprint compatibility.

Q3: Does PBSS5440D,115 match all electrical parameters of QST3TR?
A3: Parameters such as transistor type, cutoff current, mounting type, operating temperature, RoHS status, REACH status, and MSL are aligned. Variances exist in collector current, collector-emitter breakdown voltage, Vce saturation, current gain, maximum power, and transition frequency. Detailed review of use-case requirements is necessary.

Q4: Are there compliance or certification differences between QST3TR and PBSS5440D,115?
A4: Both devices are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity levels are identical (1, unlimited).

Q5: Is the PBSS5440D,115 suitable for automotive applications?
A5: The provided input notes 'Grade: Automotive; Qualification: AEC-Q100' for PBSS5440D,115, which may be relevant where automotive grade qualification is required.

Q6: Is device availability a factor for substituting QST3TR?
A6: Inventory levels are provided for informational purposes only. Substitute selection in engineering is based on electrical, mechanical, compliance, and manufacturing status parameters.