2SC1740STPR Equivalent & Substitute Parts Reference

Part Overview

The Rohm Semiconductor 2SC1740STPR is an NPN bipolar junction transistor (BJT) designed for through-hole mounting and general-purpose signal amplification. This device features a maximum collector current of 150 mA, collector-emitter voltage of 50 V, transition frequency of 180 MHz, and maximum power dissipation of 300 mW, housed in an SC-72 (SPT) package. The 2SC1740STPR is classified as "Obsolete," necessitating the identification of electrically and mechanically compatible substitute transistors to ensure ongoing design support and maintenance.

Substiute Parts

2SC1740STPR

Rohm SemiconductorIn Stock: 33132SC1740STPR Datasheet

Current PartRFQ

KSC945YTA

onsemiIn Stock: 49007KSC945YTA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are selected based strictly on alignment of key electrical and mechanical parameters including: transistor type (NPN), maximum collector current, collector-emitter voltage, current gain (hFE), maximum power dissipation, frequency characteristics, package type, RoHS, and REACH compliance. Only parts with through-hole mounting and equivalent package formats are considered for substitution. Parameters must meet or exceed the original 2SC1740STPR values where relevant.

Parameter Comparison

Engineering Selection Recommendations

Select substitute parts only from components that match the RoHS and REACH compliance status, and meet EAR99 and HTSUS: 8541.21.0075 requirements as provided. KSC945YTA (onsemi) is listed as an active part and matches these compliance attributes.

Frequently Asked Questions (FAQ)

Q1: What are the main criteria for substituting the 2SC1740STPR?
A1: The main criteria include transistor type, maximum collector current, collector-emitter voltage breakdown, current gain, frequency specification, power dissipation limit, mounting type, package compatibility, and compliance certifications.

Q2: Is the KSC945YTA an exact mechanical replacement for the 2SC1740STPR?
A2: KSC945YTA uses a TO-226-3, TO-92-3 (TO-226AA) formed leads package, while the 2SC1740STPR uses SC-72 formed leads. Both are through-hole types with formed leads, but exact pinout and fit require matching the specified package format.

Q3: Are there differences in current gain (hFE) that affect substitution?
A3: The 2SC1740STPR specifies a hFE (min) of 180 @ 1mA, 6V, while the KSC945YTA specifies 120 @ 1mA, 6V. For applications requiring higher current gain, this difference must be considered.

Q4: What compliance and environmental certifications are covered for substitutes?
A4: Substitute parts listed must be ROHS3 compliant, REACH unaffected, and have the specified ECCN and HTSUS codes.

Q5: How should inventory status be considered in substitution?
A5: The 2SC1740STPR is obsolete. Substitute selection prioritizes parts listed as "active" and with current inventory.