2SD1758TLQ Equivalent & Substitute Parts Reference

Part Overview

The 2SD1758TLQ is a surface mount NPN bipolar junction transistor (BJT) manufactured by Rohm Semiconductor. It features a collector-emitter breakdown voltage of 32 V, a collector current maximum of 2 A, a maximum power dissipation of 10 W, and operates at frequencies up to 100 MHz. This part is supplied in a CPT3 (TO-252-3, DPAK, 2 Leads + Tab, SC-63) package and is classified as ROHS3 compliant with an MSL of 1 (unlimited). Due to its product status as "Not For New Designs," sourcing direct replacements or evaluating substitute parts with similar key electrical and packaging parameters is necessary for continued design support and ongoing production.

Substiute Parts

2SD1758TLQ

Rohm SemiconductorIn Stock: 122652SD1758TLQ Datasheet

Current PartRFQ

ZXT849KTC

Diodes IncorporatedIn Stock: 1345ZXT849KTC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

For the "Transistors, Bipolar (BJT)" category, substitutions are determined by strictly matching or exceeding the following parameters:

• Transistor Type: NPN
• Voltage - Collector Emitter Breakdown (Max)
• Current - Collector (Ic) (Max)
• Vce Saturation (Max) at the specified test conditions
• Collector Cutoff Current (ICBO)
• DC Current Gain (hFE, Min) at defined Ic and Vce
• Maximum Power Dissipation
• Frequency - Transition
• Operating Temperature
• Mounting Type
• Package / Case
• Supplier Device Package
• Compliance (RoHS, MSL, REACH)

The substitute part ZXT849KTC matches these parameters with minor differences in exact values, remaining within the summarized requirements provided.

Parameter Comparison

Engineering Selection Recommendations

The 2SD1758TLQ is classified as "Not For New Designs," whereas the ZXT849KTC remains active. Both parts are ROHS3 compliant, have a Moisture Sensitivity Level (MSL) of 1 (unlimited), and are classified as REACH Unaffected. These criteria support the consideration of ZXT849KTC as a substitute based on current regulatory and compliance standards.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters when selecting a substitute for 2SD1758TLQ?
A1: Substitution is based strictly on transistor type (NPN), voltage and current ratings, Vce saturation, ICBO, DC current gain, power dissipation, transition frequency, operating temperature, mounting type, package/case, supplier device package, and compliance certifications.

Q2: Does package equivalence ensure mechanical compatibility?
A2: Both 2SD1758TLQ and ZXT849KTC use the TO-252-3, DPAK (2 Leads + Tab), SC-63 surface-mount package, which satisfies the package compatibility criterion.

Q3: Are there differences in DC current gain (hFE) and collector current (Ic)?
A3: There are differences in minimum hFE and Ic specifications. Comparison must be made using the exact test conditions provided in the part datasheets, as reflected in the supplied parameters.

Q4: What is the impact of "Not For New Designs" status?
A4: "Not For New Designs" indicates the part is not recommended for new projects, warranting source evaluation of replacement components for ongoing or future production.

Q5: How important is RoHS and REACH compliance in selection?
A5: Both main and substitute parts are ROHS3 compliant and REACH unaffected, which aligns with regulatory and environmental standards for most applications in this component category.