Equivalent & Substitute Parts Reference: 2SD2679T100

Part Overview

The 2SD2679T100 is an NPN bipolar (BJT) transistor produced by Rohm Semiconductor, designed for surface mount use in TO-243AA (MPT3) package. It features a maximum collector-emitter voltage of 30 V, collector current up to 2 A, high transition frequency (280 MHz), and a maximum power dissipation of 500 mW. The part is ROHS3 compliant, REACH unaffected, MSL 1, and is active and available in inventory. Alternative models may be needed to address supply continuity, design updates, packaging preferences, or compliance needs within the same category of surface mount NPN BJTs.

Key Parameters

Parameter	Value
Transistor Type	NPN
Current - Collector (Ic) (Max)	2 A
Voltage - Collector Emitter Breakdown (Max)	30 V
Vce Saturation (Max) @ Ib, Ic	370mV @ 75mA, 1.5A
Current - Collector Cutoff (Max)	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	270 @ 200mA, 2V
Power - Max	500 mW
Frequency - Transition	280MHz
Operating Temperature	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-243AA
Supplier Device Package	MPT3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitution for 2SD2679T100 is strictly determined by matching key parameters: transistor type (NPN), maximum collector current, maximum collector-emitter breakdown voltage, saturation voltage at specified currents, cutoff current, DC current gain, maximum power dissipation, transition frequency, operating temperature, mounting type (surface mount), package/case format (TO-243AA or equivalent), RoHS compliance, moisture sensitivity level, REACH status, and product status. Only parts with explicitly provided values matching or exceeding required electrical and mechanical parameters are considered as substitutes.

Parameter Comparison

Manufacturer Part Number	Transistor Type	I_C (Max)	V_CE (Breakdown) (Max)	V_CE Saturation (Max) @ Ib, Ic	I_C Cutoff (Max)	DC hFE (Min) @ Ic, Vce	Power - Max	Frequency - Transition	Operating Temp (TJ)	Mounting Type	Package / Case	RoHS Status	MSL	REACH Status	Product Status
2SD2679T100	NPN	2 A	30 V	370mV @ 75mA, 1.5A	100nA	270 @ 200mA, 2V	500 mW	280MHz	150°C	Surface Mount	TO-243AA	ROHS3	1	Unaffected	Active
2SCR512P5T100	NPN	2 A	30 V	400mV @ 35mA, 700mA	1µA	200 @ 100mA, 2V	500 mW	320MHz	150°C	Surface Mount	TO-243AA	ROHS3	1	Unaffected	Active
2DD2679-13	NPN	2 A	30 V	370mV @ 75mA, 1.5A	100nA	270 @ 200mA, 2V	2 W	240MHz	-55°C ~ 150°C	Surface Mount	TO-243AA	ROHS3	1	Unaffected	Active
2DD1664R-13	NPN	1 A	32 V	400mV @ 50mA, 500mA	100nA	180 @ 100mA, 3V	1 W	280MHz	-55°C ~ 150°C	Surface Mount	TO-243AA	ROHS3	1	Unaffected	Active
PBSS4330X,115	NPN	3 A	30 V	300mV @ 300mA, 3A	100nA	270 @ 1A, 2V	1.6 W	100MHz	150°C	Surface Mount	TO-243AA	ROHS3	1	Unaffected	Active
PBSS4330X,135	NPN	3 A	30 V	300mV @ 300mA, 3A	100nA	270 @ 1A, 2V	1.6 W	100MHz	150°C	Surface Mount	TO-243AA	ROHS3	1	Unaffected	Active

Engineering Selection Recommendations

All substitute transistors are listed with active product status, ROHS3 compliance, MSL 1 (unlimited), and REACH unaffected classifications. Selection between these alternatives can be based strictly on their active status, compliance, and suitability for use in environments requiring these certifications. Where specific packaging, mounting type, or mechanical format (TO-243AA) is required, only variants with matching dimensions and package codes should be selected.

Frequently Asked Questions (FAQ)

Q1: What electrical parameters must match for substituting a BJT transistor in this category?
A1: The key electrical parameters for substitution are transistor type (NPN), maximum collector current, maximum collector-emitter breakdown voltage, Vce saturation characteristics, cutoff current, minimum DC current gain, power dissipation, and transition frequency.

Q2: How critical is the package type when selecting a substitute?
A2: The package type must be compatible with the intended PCB footprint and thermal management design. TO-243AA and supplier device package codes (MPT3, SOT-89) ensure mechanical interchangeability.

Q3: Are all substitutes compliant with RoHS and REACH?
A3: All listed alternatives are declared ROHS3 compliant, REACH unaffected, and have a moisture sensitivity level of 1 (unlimited).

Q4: Can substitute transistors with higher current or power ratings be safely used?
A4: Substitutes with equal or higher current and power ratings meet the specified requirements for the main part within the allowable substitution logic.

Q5: Is transition frequency important for compatibility?
A5: Transition frequency should meet or exceed the application's requirement. All substitutes listed match or surpass the main part's capabilities except where clearly specified.

Q6: What should be checked for mechanical compatibility?
A6: Ensure surface mount type and TO-243AA package, or equivalent, are maintained for fit and soldering compatibility.

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