DMC2640F0R Equivalent & Substitute Parts Reference

Part Overview

The DMC2640F0R (Rohm Semiconductor) is a dual NPN, pre-biased bipolar transistor intended for surface mount applications. It features integrated base and emitter resistors, suitable for compact designs requiring simple biasing. The product is marked obsolete, necessitating identification of substitute models for continuity in maintenance, repair, and new design.

Substiute Parts

DMC2640F0R

Rohm SemiconductorIn Stock: 1168DMC2640F0R Datasheet

Current PartRFQ

DTC143XKAT146

Rohm SemiconductorIn Stock: 2405282DTC143XKAT146 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The substitution logic for DMC2640F0R in the transistors, bipolar (BJT) category is based strictly on matching the following provided key parameters: transistor type (pre-biased NPN), collector current rating, collector-emitter breakdown voltage, base and emitter resistor values, DC current gain, saturation voltage, collector cutoff current, maximum power dissipation, and surface mount capability. RoHS and MSL compliance are observed for regulatory compatibility. Package compatibility must be confirmed based on provided information.

Parameter Comparison

Engineering Selection Recommendations

The main part DMC2640F0R is designated obsolete. Substitute models such as DTC143XKAT146, meeting provided parameters and compliance standards (ROHS3 Compliant, MSL 1), offer continuity for replacement and new designs within the pre-biased NPN transistor functional class. Package and maximum power ratings differ and should be verified according to application constraints.

Frequently Asked Questions (FAQ)

Q1: What are the essential substitution criteria for transistors in this category?
Substitution is determined strictly by transistor type, collector current rating, collector-emitter voltage, integrated resistor values, DC current gain, cutoff current, saturation voltage, power dissipation, mounting type, package details, and compliance (RoHS, MSL).

Q2: Is package compatibility guaranteed between DMC2640F0R and DTC143XKAT146?
Package compatibility is not identical; DMC2640F0R uses SOT-23-6 while DTC143XKAT146 is supplied in TO-236-3, SC-59, SOT-23-3. Suitability depends on PCB layout and mechanical constraints specified in the design.

Q3: Does the substitute part provide equivalent electrical performance?
The substitute DTC143XKAT146 matches the main electrical parameters such as collector current, voltage, resistor values, and compliance status, with differences in maximum power dissipation and DC current gain test conditions as provided.

Q4: Are both parts compliant with RoHS and MSL requirements?
Both DMC2640F0R and DTC143XKAT146 are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited).

Q5: What is the impact of the main part’s obsolete status on component selection?
Obsolete status requires selection of an active substitute with matching parameters to maintain technical and regulatory continuity in assemblies where the original part is no longer available.

Q6: Are dual NPN configurations supported in the substitute part?
The substitute DTC143XKAT146 is specified as NPN - Pre-Biased. Dual configuration is not indicated in the substitute part’s provided description. Detailed schematic requirements must be confirmed according to application.