Equivalent & Substitute Parts for 2DB1689-7

Part Overview

The 2DB1689-7 is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-323 package. This component operates at 12 V with a maximum collector current of 1.5 A and a maximum power dissipation of 300 mW. The device is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing production and maintenance applications. Active alternatives with compatible electrical and mechanical specifications are available to ensure design continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	12	V
Current - Collector (Ic) (Max)	1.5	A
Power - Max	300	mW
Frequency - Transition	300	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-323	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 2DB1689-7 is determined by the following critical parameters:

Primary Compatibility Criteria:

Transistor type (PNP)
Voltage rating (12 V minimum collector-emitter breakdown voltage)
Current capability (minimum 1.5 A collector current)
Package type (SOT-323 surface mount)
Operating temperature range (-55°C to 150°C)
RoHS3 compliance

Substitution Logic:

The ZUMT717TA (Diodes Incorporated) qualifies as a manufacturer-recommended substitute despite a reduced maximum collector current specification of 1.25 A. This part maintains the 12 V voltage rating, SOT-323 package, and full operating temperature range. The ZUMT717TA is an active product with enhanced power dissipation (500 mW) and improved frequency response (220 MHz), making it suitable for applications where the 1.25 A current rating is sufficient.

The 2SB1689T106 (Rohm Semiconductor) qualifies as a direct substitute with identical electrical specifications to the 2DB1689-7, including 1.5 A maximum collector current and 12 V voltage rating. This part is packaged in UMT3 (functionally equivalent to SOT-323) and is an active product with superior frequency response (400 MHz). The 2SB1689T106 provides the closest electrical match to the obsolete 2DB1689-7.

Parameter Comparison

Parameter	2DB1689-7 (Main)	ZUMT717TA (Substitute)	2SB1689T106 (Substitute)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Rohm Semiconductor
Transistor Type	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	12 V	12 V	12 V
Current - Collector (Ic) (Max)	1.5 A	1.25 A	1.5 A
Vce Saturation (Max) @ Ib, Ic	200mV @ 25mA, 500mA	240mV @ 100mA, 1.25A	200mV @ 25mA, 500mA
Current - Collector Cutoff (Max)	100nA (ICBO)	10nA	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	270 @ 200mA, 2V	200 @ 500mA, 2V	270 @ 200mA, 2V
Power - Max	300 mW	500 mW	200 mW
Frequency - Transition	300 MHz	220 MHz	400 MHz
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	SOT-323	SOT-323	UMT3
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

The 2SB1689T106 from Rohm Semiconductor is the optimal choice for applications requiring exact electrical equivalence to the 2DB1689-7. This part maintains the 1.5 A collector current rating, 12 V voltage specification, and identical DC current gain characteristics. The UMT3 package is mechanically and functionally equivalent to SOT-323 for surface mount applications. As an active product with ROHS3 compliance and unlimited moisture sensitivity rating, the 2SB1689T106 ensures long-term supply availability and regulatory compliance.

For Current-Limited Applications:

The ZUMT717TA from Diodes Incorporated serves as an alternative for designs where the maximum collector current requirement does not exceed 1.25 A. This part offers enhanced power dissipation capability (500 mW versus 300 mW) and maintains full voltage and temperature specifications. The ZUMT717TA is supplied in tape and reel packaging and is an active product with ROHS3 compliance. Selection of this part is appropriate when circuit design permits operation within the reduced current specification.

Compliance and Supply Considerations:

Both substitute parts are active products with ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the obsolete 2DB1689-7. Both substitutes feature MSL 1 (unlimited) moisture sensitivity, eliminating special handling requirements. The 2SB1689T106 offers significantly higher inventory availability (225,300 pieces) compared to the ZUMT717TA (6,445 pieces), providing supply chain advantages for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the ZUMT717TA be used as a direct replacement for the 2DB1689-7 in all applications?

A: The ZUMT717TA is suitable for applications where the maximum collector current requirement does not exceed 1.25 A. If the circuit design requires the full 1.5 A capability of the 2DB1689-7, the 2SB1689T106 is the appropriate choice. Both parts maintain the 12 V voltage rating and SOT-323 package compatibility.

Q: What is the difference between SOT-323 and UMT3 packages?

A: SOT-323 and UMT3 are functionally equivalent surface mount packages for small-signal transistors. Both packages provide the same pin configuration and mechanical footprint for PCB assembly. The 2SB1689T106 in UMT3 packaging is mechanically compatible with designs specified for SOT-323.

Q: Are there any thermal considerations when substituting the 2DB1689-7?

A: The 2SB1689T106 has a maximum power rating of 200 mW, which is lower than the 2DB1689-7 (300 mW). The ZUMT717TA has a maximum power rating of 500 mW. Thermal design should account for these power dissipation differences. Both substitutes maintain the full operating temperature range of -55°C to 150°C.

Q: Do the substitute parts have the same DC current gain characteristics?

A: The 2SB1689T106 maintains identical DC current gain specifications (270 @ 200mA, 2V) to the 2DB1689-7. The ZUMT717TA has a lower minimum DC current gain (200 @ 500mA, 2V). Circuit designs dependent on specific current gain values should account for these differences.

Q: What is the frequency response difference between the main part and substitutes?

A: The 2DB1689-7 has a transition frequency of 300 MHz. The ZUMT717TA operates at 220 MHz, while the 2SB1689T106 operates at 400 MHz. For high-frequency applications, the 2SB1689T106 provides superior performance. For applications below 220 MHz, both substitutes are suitable.

Q: Are both substitute parts RoHS compliant?

A: Yes, both the ZUMT717TA and 2SB1689T106 are ROHS3 compliant, matching the compliance status of the 2DB1689-7. Both parts are also REACH unaffected and classified as EAR99 for export control purposes.

Q: What packaging options are available for the substitute parts?

A: The ZUMT717TA is supplied in tape and reel (TR) packaging. The 2SB1689T106 is supplied in cut tape (CT) and Digi-Reel® packaging. Both formats are standard for surface mount component distribution and assembly.

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