2SD1664T100R Equivalent & Substitute Parts Reference

Part Overview

The Rohm Semiconductor 2SD1664T100R is a surface-mount NPN bipolar junction transistor (BJT) specified for 32 V collector-emitter voltage, 1 A maximum collector current, 150 MHz transition frequency, and 2 W power dissipation. The product is supplied in MPT3 (TO-243AA) packaging and is categorized under Transistors, Bipolar (BJT). The part is designated as "Not For New Designs," making it necessary to identify directly compatible alternatives for ongoing and future applications.

Key Parameters

Parameter	2SD1664T100R
Transistor Type	NPN
Current - Collector (Ic) (Max)	1 A
Voltage - Collector Emitter Breakdown (Max)	32 V
Vce Saturation (Max) @ Ib, Ic	400mV @ 50mA, 500mA
Current - Collector Cutoff (Max) (ICBO)	500nA
DC Current Gain (hFE) (Min) @ Ic, Vce	180 @ 100mA, 3V
Power - Max	2 W
Frequency - Transition (fT)	150MHz
Operating Temperature (TJ)	150°C
Mounting Type	Surface Mount
Package / Case	TO-243AA
Supplier Device Package	MPT3
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99

Substitute Part Grouping Explanation

Substitution is strictly based on alignment with the following key electrical and mechanical parameters: NPN transistor type, collector current rating (1 A max), collector-emitter breakdown voltage (≥32 V), Vce saturation (≤400mV @ specified Ib/Ic), minimum DC current gain (hFE ≥180 @ 100mA, 3V), power dissipation, frequency (fT), operating temperature, mounting type (surface mount), and similar package format (TO-243AA or equivalent). Compliance statuses (RoHS3, REACH, ECCN, MSL) are also matched. Only parts explicitly listed are considered.

Parameter Comparison

Parameter	2SD1664T100R	2DD1664R-13	BSR41,115
Manufacturer	Rohm Semiconductor	Diodes Incorporated	Nexperia USA Inc.
Transistor Type	NPN	NPN	NPN
Current - Collector (Ic) (Max)	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	32 V	32 V	60 V
Vce Saturation (Max) @ Ib, Ic	400mV @ 50mA, 500mA	400mV @ 50mA, 500mA	500mV @ 50mA, 500mA
Current - Collector Cutoff (Max) (ICBO)	500nA	100nA	100nA
DC Current Gain (hFE) (Min) @ Ic, Vce	180 @ 100mA, 3V	180 @ 100mA, 3V	100 @ 100mA, 5V
Power - Max	2 W	1 W	1.35 W
Frequency - Transition (fT)	150MHz	280MHz	100MHz
Operating Temperature (TJ)	150°C	-55°C ~ 150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-243AA	TO-243AA	TO-243AA
Supplier Device Package	MPT3	SOT-89-3	SOT-89
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99

Engineering Selection Recommendations

The 2SD1664T100R is not for new designs. The substitute parts 2DD1664R-13 and BSR41,115 are both active, ROHS3 compliant, REACH unaffected, and have MSL 1 (Unlimited) and EAR99 classification. These substitutes are suitable for selection in applications where ongoing availability and current compliance are required for transistors in the same category and package type.

Frequently Asked Questions (FAQ)

Q: What key parameters must be matched when selecting a substitute for 2SD1664T100R?
A: Substitution requires matching NPN type, maximum collector current, collector-emitter breakdown voltage, Vce saturation, minimum DC current gain, power dissipation, transition frequency, operating temperature, surface-mount form factor, and TO-243AA-compatible package.

Q: Are the package types for these substitutes compatible?
A: All listed devices use TO-243AA or package variants (MPT3, SOT-89-3, SOT-89) that are mechanically and footprint compatible within the surface-mount application category.

Q: Do these substitutes comply with current RoHS and REACH requirements?
A: All parts are listed as ROHS3 Compliant and REACH Unaffected.

Q: Is the electrical performance identical among substitutes?
A: Key parameters are explicitly matched where specified. Differences such as power rating, transition frequency, or collector-emitter voltage exceeding the original part are specified in the table for comparison.

Q: Is it necessary to review application requirements before substitution?
A: Compatibility is based strictly on the provided electrical and mechanical parameters and compliance designations in this reference.

Q: What is the significance of "Not For New Designs" designation?
A: The original part is not recommended for use in new designs due to lifecycle status, prompting the selection of functionally equivalent, currently active substitute models.

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