2DD1766R-13 Equivalent & Substitute Parts

Part Overview

The 2DD1766R-13 is an NPN bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-89-3 package. This device is rated for 32 V collector-emitter breakdown voltage and 2 A maximum collector current, with a maximum power dissipation of 1 W and transition frequency of 220 MHz. The part is classified as obsolete, necessitating identification of active substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	2	A
Voltage - Collector Emitter Breakdown (Max)	32	V
Vce Saturation (Max)	800	mV @ 200mA, 2A
Power - Max	1	W
Frequency - Transition	220	MHz
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA	—
Supplier Device Package	SOT-89-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 2DD1766R-13 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Collector current rating must equal or exceed 2 A
Collector-emitter breakdown voltage must equal or exceed 32 V
Maximum power dissipation must support the application requirements
Operating temperature range must encompass the design operating window

Mechanical Compatibility Criteria:

Surface mount mounting type
Package footprint compatibility (TO-243AA or equivalent)
Supplier device package must be compatible with existing PCB layouts

Substitute parts are grouped based on whether they meet these minimum requirements while maintaining functional equivalence. Parts that exceed the original specifications in current rating, voltage rating, or power dissipation are acceptable substitutes provided they maintain the same package footprint and mounting characteristics.

Parameter Comparison

Parameter	2DD1766R-13	FCX491ATA	2SD2679T100	NSS30101LT1G	PBSS303NX,115	PBSS4240XF
Manufacturer	Diodes Incorporated	Diodes Incorporated	Rohm Semiconductor	onsemi	Nexperia USA Inc.	Nexperia USA Inc.
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Current - Collector (Ic) (Max)	2 A	1 A	2 A	1 A	5.1 A	2 A
Voltage - Collector Emitter Breakdown (Max)	32 V	40 V	30 V	30 V	30 V	40 V
Power - Max	1 W	1 W	500 mW	310 mW	2.1 W	500 mW
Frequency - Transition	220 MHz	150 MHz	280 MHz	100 MHz	130 MHz	150 MHz
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C	150°C
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-236-3, SC-59, SOT-23-3	TO-243AA	TO-243AA
Supplier Device Package	SOT-89-3	SOT-89-3	MPT3	SOT-23-3 (TO-236)	SOT-89	SOT-89
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: PBSS4240XF

The PBSS4240XF from Nexperia USA Inc. is the most direct substitute for the 2DD1766R-13. This device maintains the same 2 A collector current rating and exceeds the 32 V breakdown voltage specification with a 40 V rating. The package footprint (TO-243AA / SOT-89) is identical, ensuring direct PCB compatibility. The PBSS4240XF is AEC-Q100 qualified and carries active product status with established supply chain availability. Power dissipation is rated at 500 mW, which is lower than the original 1 W specification; applications requiring the full 1 W dissipation must evaluate thermal performance in the specific circuit context.

Secondary Substitute: 2SD2679T100

The 2SD2679T100 from Rohm Semiconductor provides equivalent 2 A collector current and maintains the TO-243AA package footprint. This device offers superior transition frequency (280 MHz versus 220 MHz) and improved saturation voltage characteristics. However, the maximum power dissipation is 500 mW, and the collector-emitter breakdown voltage is 30 V, which is below the original 32 V specification. This substitute is suitable for applications where the 30 V rating is sufficient and thermal dissipation does not exceed 500 mW.

Alternative Substitute: PBSS303NX,115

The PBSS303NX,115 from Nexperia USA Inc. exceeds the original specifications with 5.1 A collector current and 2.1 W power dissipation, providing design margin for higher-current applications. The 30 V breakdown voltage is below the original 32 V specification. This device is AEC-Q100 qualified and suitable for automotive applications. The SOT-89 package is compatible with the original SOT-89-3 footprint.

Not Recommended: FCX491ATA and NSS30101LT1G

The FCX491ATA is limited to 1 A maximum collector current, which is insufficient for applications requiring the full 2 A rating of the original device. The NSS30101LT1G is similarly limited to 1 A and uses a different package (SOT-23-3), which requires PCB layout modification and is not a direct footprint replacement.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and operating temperature ranges compatible with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the FCX491ATA be used as a substitute for the 2DD1766R-13?

A: The FCX491ATA is not suitable as a direct substitute. Although it shares the same SOT-89-3 package and manufacturer (Diodes Incorporated), the maximum collector current is limited to 1 A, compared to the 2 A requirement of the 2DD1766R-13. Applications requiring 2 A operation will experience current limiting or circuit malfunction with this substitute.

Q: What is the primary difference between the PBSS4240XF and the 2DD1766R-13?

A: The PBSS4240XF maintains the same 2 A collector current and TO-243AA package footprint as the 2DD1766R-13. The primary differences are: (1) collector-emitter breakdown voltage is increased from 32 V to 40 V, providing additional voltage margin; (2) maximum power dissipation is reduced from 1 W to 500 mW; (3) transition frequency is reduced from 220 MHz to 150 MHz; (4) product status is active with established supply availability. The PBSS4240XF is AEC-Q100 qualified, making it suitable for automotive applications.

Q: Why is the NSS30101LT1G listed as a substitute if it uses a different package?

A: The NSS30101LT1G is listed in the original substitute list provided but is not recommended for direct substitution due to package incompatibility. The NSS30101LT1G uses SOT-23-3 (TO-236) packaging, which has a different footprint than the SOT-89-3 (TO-243AA) of the original device. Additionally, the 1 A current rating is insufficient for 2 A applications. Package conversion would require PCB redesign.

Q: Can the 2SD2679T100 be used in applications requiring full 1 W power dissipation?

A: The 2SD2679T100 is rated for 500 mW maximum power dissipation, which is half the original 1 W specification. Applications requiring sustained 1 W dissipation must evaluate whether the circuit can operate within the 500 mW thermal budget. Thermal analysis of the specific application is necessary to determine suitability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (PBSS4240XF, 2SD2679T100, NSS30101LT1G, PBSS303NX,115, and FCX491ATA) are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of the original 2DD1766R-13.

Q: What is the significance of AEC-Q100 qualification on the PBSS4240XF and PBSS303NX,115?

A: AEC-Q100 qualification indicates that these devices meet automotive industry reliability and quality standards established by the Automotive Electronics Council. This qualification is relevant for applications in automotive or other high-reliability environments where component qualification documentation is required. The original 2DD1766R-13 does not carry this qualification.

Q: Can the PBSS303NX,115 be used in place of the 2DD1766R-13 despite the lower voltage rating?

A: The PBSS303NX,115 has a 30 V collector-emitter breakdown voltage, compared to 32 V for the original device. This 2 V difference may be acceptable in applications where the actual operating voltage is significantly below 30 V, providing adequate safety margin. However, applications designed to operate near 32 V should not use this substitute without circuit analysis to confirm voltage margin remains adequate.

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