DCX114TK-7-F Equivalent & Substitute Parts

Part Overview

The DCX114TK-7-F is a pre-biased dual bipolar transistor (BJT) manufactured by Diodes Incorporated, combining 1 NPN and 1 PNP transistor in a single surface mount package. This device is classified as Active product status and is designed for applications requiring integrated bias resistor networks to simplify circuit design and reduce component count.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design flexibility permits the use of functionally equivalent alternatives. The DCX114TK-7-F has been identified with manufacturer-recommended substitutes that maintain electrical and mechanical compatibility within specified parameters.

Key Parameters

Parameter	Value	Unit
Transistor Type	1 NPN, 1 PNP - Pre-Biased (Dual)	—
Current - Collector (Ic) (Max)	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	10	kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 1mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	300 @ 100µA, 1mA	mV
Frequency - Transition	250	MHz
Power - Max	300	mW
Mounting Type	Surface Mount	—
Package / Case	SC-74, SOT-457	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the DCX114TK-7-F is determined by strict alignment of the following critical parameters:

Electrical Compatibility Requirements:

Maximum collector current: 100mA
Maximum collector-emitter breakdown voltage: 50V
Base resistor value: 10kOhms
Transition frequency: 250MHz
Maximum power dissipation: 300mW
Surface mount packaging: SC-74 / SOT-457

Regulatory & Environmental Compliance:

RoHS compliance status (ROHS3 or equivalent)
Moisture sensitivity level: 1 (Unlimited)
ECCN classification: EAR99

The substitute part RN1611(TE85L,F) from Toshiba Semiconductor and Storage meets all specified electrical parameters and maintains equivalent regulatory compliance. While the transistor configuration differs (2 NPN vs. 1 NPN/1 PNP), the electrical performance envelope and package footprint remain compatible for applications where the dual NPN configuration is functionally acceptable.

Parameter Comparison

Parameter	DCX114TK-7-F (Diodes Inc.)	RN1611(TE85L,F) (Toshiba)	Match Status
Current - Collector (Ic) (Max)	100 mA	100 mA	Equivalent
Voltage - Collector Emitter Breakdown (Max)	50 V	50 V	Equivalent
Resistor - Base (R1)	10 kOhms	10 kOhms	Equivalent
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 1mA, 5V	120 @ 1mA, 5V	Compatible (Higher Gain)
Vce Saturation (Max) @ Ib, Ic	300 mV @ 100µA, 1mA	300 mV @ 250µA, 5mA	Compatible (Different Test Conditions)
Frequency - Transition	250 MHz	250 MHz	Equivalent
Power - Max	300 mW	300 mW	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	SC-74, SOT-457	SC-74, SOT-457	Equivalent
RoHS Status	ROHS3 Compliant	RoHS Compliant	Compatible
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Primary Part: DCX114TK-7-F

The DCX114TK-7-F remains the preferred selection when available. This part carries Active product status and ROHS3 compliance certification. The dual NPN/PNP configuration provides integrated functionality for complementary switching applications.

Substitute Part: RN1611(TE85L,F)

The RN1611(TE85L,F) from Toshiba is a qualified manufacturer-recommended substitute. This part maintains Active product status and RoHS compliance. The dual NPN configuration (versus the original NPN/PNP pairing) requires circuit-level evaluation to confirm functional compatibility. All electrical parameters—collector current, breakdown voltage, base resistor value, transition frequency, and power rating—are equivalent or superior to the primary part.

Both parts are surface mount devices in SC-74/SOT-457 packages with MSL 1 rating, ensuring compatibility with standard PCB assembly processes and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the RN1611(TE85L,F) be used as a direct replacement for the DCX114TK-7-F?

A: The RN1611(TE85L,F) is electrically compatible in terms of current, voltage, frequency, and power ratings. However, the transistor configuration differs: the DCX114TK-7-F contains 1 NPN and 1 PNP transistor, while the RN1611(TE85L,F) contains 2 NPN transistors. Direct substitution is possible only if the circuit design does not require the PNP transistor functionality.

Q: Are the package footprints identical?

A: Both parts use SC-74/SOT-457 surface mount packages. The physical footprint and pin layout are compatible, allowing for direct PCB placement without layout modifications.

Q: What are the key electrical parameters that determine substitution eligibility?

A: The critical parameters are maximum collector current (100mA), collector-emitter breakdown voltage (50V), base resistor value (10kOhms), transition frequency (250MHz), and maximum power dissipation (300mW). Both parts meet these specifications.

Q: Do both parts meet the same regulatory compliance standards?

A: Both parts are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. The DCX114TK-7-F is ROHS3 compliant, while the RN1611(TE85L,F) is RoHS compliant. Both are classified as EAR99 for export control purposes.

Q: What is the difference in DC current gain between the two parts?

A: The DCX114TK-7-F specifies a minimum DC current gain (hFE) of 100 @ 1mA, 5V. The RN1611(TE85L,F) specifies a minimum hFE of 120 @ 1mA, 5V. The substitute part exhibits higher current gain, which may affect circuit biasing and should be evaluated in the specific application context.

Q: Are there any storage or handling differences between these parts?

A: Both parts carry MSL 1 (Unlimited) ratings, indicating no moisture sensitivity restrictions. Standard surface mount component handling and storage procedures apply to both devices.

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