Equivalent & Substitute Parts Reference for 2SC1741ASTPQ

Part Overview

The 2SC1741ASTPQ is an NPN bipolar junction transistor (BJT) from Rohm Semiconductor. It is specified for 50 V collector-emitter breakdown, 500 mA maximum collector current, 250MHz transition frequency, and is designed for through-hole mounting in an SC-72 package (SPT formed leads). As this product is now classified as obsolete, identification of alternatives or substitutes is required to maintain continuity for designs or manufacturing processes that previously utilized the 2SC1741ASTPQ.

Substiute Parts

2SC1741ASTPQ

Rohm SemiconductorIn Stock: 52772SC1741ASTPQ Datasheet

Current PartRFQ

KSC1815YTA

onsemiIn Stock: 57230KSC1815YTA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for bipolar NPN transistors are determined by matching critical electrical and mechanical parameters. These parameters include: transistor type (NPN), maximum collector current (Ic), collector-emitter breakdown voltage (Vce), saturation voltage, cutoff current, minimum DC current gain (hFE), maximum power dissipation, transition frequency, operating temperature, mounting type, package and compliance (RoHS and REACH). Only those substitutes meeting these specified characteristics are considered equivalent for direct replacement within the given category and application envelope.

Parameter Comparison

Engineering Selection Recommendations

The 2SC1741ASTPQ is specified as obsolete. Substitute selection is based upon status as active or available in inventory, combined with compliance to ROHS3 and REACH standards. The substitute KSC1815YTA is compliant with ROHS3 and REACH requirements and possesses active product status, supporting continued application within certified and regulated environments.

Frequently Asked Questions (FAQ)

Q1: What parameters must be matched for substitution in bipolar NPN transistors?
Substitution requires equivalence in transistor type, collector-emitter breakdown voltage, maximum collector current, saturation voltage, cutoff current, minimum DC current gain, power dissipation, frequency, operating temperature, mounting type, and package.

Q2: Is package compatibility maintained between 2SC1741ASTPQ and KSC1815YTA?
Both devices are designed for through-hole mounting; however, the main part uses SC-72 formed leads (SPT) and the substitute uses TO-92-3 formed leads (TO-226AA). Dimensional and footprint considerations may require evaluation based on provided mechanical data.

Q3: Why is a substitute required for 2SC1741ASTPQ?
Substitution is necessary because the 2SC1741ASTPQ is currently classified as obsolete.

Q4: Are the substitute parts compliant with relevant environmental regulations?
Both 2SC1741ASTPQ and KSC1815YTA are specified as ROHS3 compliant and REACH unaffected by provided input parameters.

Q5: How does transition frequency impact selection between these parts?
Transition frequency (250MHz vs. 80MHz) indicates the frequency response characteristic of each BJT, which may affect high-frequency applications according to provided data.

Q6: Does the substitute KSC1815YTA offer certified inventory for manufacturing scale?
The provided data indicates inventory availability for KSC1815YTA, supporting its use in ongoing production.