DDC124EUQ-7-F Equivalent & Substitute Parts

Part Overview

The DDC124EUQ-7-F is a pre-biased dual NPN bipolar transistor (BJT) manufactured by Diodes Incorporated in SOT-363 surface mount packaging. This component integrates two NPN transistors with internal biasing resistors, designed for applications requiring compact switching and amplification functionality. The part is active in production status with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or manufacturing transitions.

Key Parameters

Parameter	Value	Unit
Transistor Type	2 NPN - Pre-Biased (Dual)	—
Current - Collector (Ic) (Max)	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	22	kOhms
Resistor - Emitter Base (R2)	22	kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce	56 @ 5mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	300	mV @ 500µA, 10mA
Current - Collector Cutoff (Max)	500	nA
Frequency - Transition	250	MHz
Power - Max	200	mW
Package / Case	6-TSSOP, SC-88, SOT-363	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the DDC124EUQ-7-F is determined by the following critical parameters:

Electrical Compatibility Criteria:

Maximum collector current (100 mA minimum)
Collector-emitter breakdown voltage (50 V minimum)
Transistor configuration (2 NPN - Pre-Biased Dual, or 1 NPN + 1 PNP - Pre-Biased Dual for mixed-type applications)
Internal biasing resistor values (10 kOhms or 22 kOhms)
Power dissipation capability (200 mW or higher)
Surface mount package compatibility (6-TSSOP, SC-88, SOT-363)

Compliance & Status Criteria:

Active product status
ROHS3 compliance
REACH unaffected status

Substitute parts are grouped into two categories:

Category 1: Dual NPN Configuration (Direct Functional Equivalents)

PUMH11,115 (Nexperia, 2 NPN, 10 kOhms biasing)
PUMH11F (Nexperia, 2 NPN, 10 kOhms biasing)
RN1902,LF(CT (Toshiba, 2 NPN, 10 kOhms biasing)

Category 2: Mixed NPN/PNP Configuration (Functional Alternatives)

PUMD3,115 (Nexperia, 1 NPN + 1 PNP, 10 kOhms biasing)
PUMD3,165 (Nexperia, 1 NPN + 1 PNP, 10 kOhms biasing)
RN4902,LF(CT (Toshiba, 1 NPN + 1 PNP, 10 kOhms biasing)
RN4982,LF(CT (Toshiba, 1 NPN + 1 PNP, 10 kOhms biasing)

Parameter Comparison

Part Number	Manufacturer	Transistor Type	Ic (Max) mA	Vce Breakdown (Max) V	R1 (Base) kOhms	R2 (Emitter Base) kOhms	hFE (Min) @ Ic, Vce	Vce Sat (Max) mV	Icbo (Max)	Freq - Transition MHz	Power (Max) mW	Package	Packaging Type
DDC124EUQ-7-F	Diodes Incorporated	2 NPN	100	50	22	22	56 @ 5mA, 5V	300 @ 500µA, 10mA	500 nA	250	200	SOT-363	Tape & Reel
PUMH11,115	Nexperia USA Inc.	2 NPN	100	50	10	10	30 @ 5mA, 5V	150 @ 500µA, 10mA	1 µA	—	300	6-TSSOP	Tape & Reel
PUMH11F	Nexperia USA Inc.	2 NPN	100	50	10	10	30 @ 5mA, 5V	150 @ 500µA, 10mA	1 µA	—	300	6-TSSOP	Tape & Reel
RN1902,LF(CT	Toshiba Semiconductor and Storage	2 NPN	100	50	10	10	50 @ 10mA, 5V	300 @ 250µA, 5mA	500 nA	250	200	SOT-363	Tape & Reel
PUMD3,115	Nexperia USA Inc.	1 NPN, 1 PNP	100	50	10	10	30 @ 5mA, 5V	150 @ 500µA, 10mA	1 µA	—	300	6-TSSOP	Cut Tape & Digi-Reel
PUMD3,165	Nexperia USA Inc.	1 NPN, 1 PNP	100	50	10	10	30 @ 5mA, 5V	150 @ 500µA, 10mA	1 µA	—	300	6-TSSOP	Tape & Reel
RN4902,LF(CT	Toshiba Semiconductor and Storage	1 NPN, 1 PNP	100	50	10	10	50 @ 10mA, 5V	300 @ 250µA, 5mA	500 nA	200	200	SOT-363	Tape & Reel
RN4982,LF(CT	Toshiba Semiconductor and Storage	1 NPN, 1 PNP	100	50	10	10	50 @ 10mA, 5V	300 @ 250µA, 5mA	100 nA	250, 200	200	SOT-363	Tape & Reel

Engineering Selection Recommendations

For Direct Dual NPN Replacement (Identical Functional Role):

The RN1902,LF(CT from Toshiba Semiconductor and Storage is the primary substitute for the DDC124EUQ-7-F. Both parts share identical maximum ratings (100 mA collector current, 50 V breakdown voltage, 200 mW power dissipation, 250 MHz transition frequency) and identical transistor configuration (2 NPN - Pre-Biased Dual). The RN1902,LF(CT maintains the same saturation voltage characteristics (300 mV) and collector cutoff current (500 nA), ensuring functional equivalence in switching and amplification circuits. Both parts are ROHS3 compliant and active in production status.

The PUMH11,115 and PUMH11F from Nexperia USA Inc. are functionally compatible substitutes with the same electrical ratings and transistor configuration. These parts feature lower internal biasing resistors (10 kOhms versus 22 kOhms) and improved saturation characteristics (150 mV versus 300 mV), resulting in faster switching response and lower on-state losses. Higher power dissipation capability (300 mW versus 200 mW) provides additional thermal margin. Both Nexperia parts are ROHS3 compliant and active in production.

For Mixed NPN/PNP Configuration (Functional Alternatives):

The PUMD3,115 and PUMD3,165 from Nexperia USA Inc., and RN4902,LF(CT and RN4982,LF(CT from Toshiba Semiconductor and Storage are suitable substitutes when circuit design requires complementary NPN and PNP transistor pairs within a single package. These parts maintain identical maximum ratings (100 mA, 50 V, 200 mW or 300 mW) and are ROHS3 compliant. The mixed configuration enables push-pull output stages and complementary switching applications not possible with dual NPN devices.

Compliance & Availability Considerations:

All substitute parts listed are active in production status with ROHS3 compliance and REACH unaffected status. The Nexperia PUMD3,165 and PUMH11,115 offer the highest inventory availability (158,277 and 6,300 units respectively). The Toshiba RN1902,LF(CT provides the closest electrical match to the original DDC124EUQ-7-F with 3,820 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the PUMH11,115 directly replace the DDC124EUQ-7-F in all applications?

A: The PUMH11,115 is electrically compatible as a dual NPN pre-biased transistor with identical maximum ratings. The primary difference is the internal biasing resistor value (10 kOhms versus 22 kOhms), which results in faster switching and lower saturation voltage. Applications sensitive to biasing resistor values or requiring specific DC current gain characteristics must be evaluated individually. Both parts are surface mount SOT-363 compatible.

Q: What is the difference between the Nexperia PUMD3 and PUMH11 series?

A: The PUMD3 series contains one NPN and one PNP transistor (complementary pair), while the PUMH11 series contains two NPN transistors (dual NPN). The DDC124EUQ-7-F is a dual NPN device, making the PUMH11 series the direct functional equivalent. The PUMD3 series is suitable for applications requiring both NPN and PNP switching or amplification within a single package.

Q: Are there packaging differences between substitute parts?

A: All substitute parts use 6-TSSOP or SOT-363 surface mount packages, which are mechanically and electrically compatible. Packaging type (Tape & Reel versus Cut Tape & Digi-Reel) affects supply format only and does not impact circuit performance. The DDC124EUQ-7-F is supplied in Tape & Reel format; equivalent Tape & Reel substitutes include PUMH11,115, PUMH11F, RN1902,LF(CT, PUMD3,165, RN4902,LF(CT, and RN4982,LF(CT.

Q: How do the Toshiba RN1902 and RN4902 parts differ from the Nexperia alternatives?

A: The Toshiba RN1902,LF(CT is a dual NPN device matching the DDC124EUQ-7-F configuration exactly. The Toshiba RN4902,LF(CT is a mixed NPN/PNP device. Both Toshiba parts feature higher DC current gain (50 @ 10mA, 5V versus 30 @ 5mA, 5V for Nexperia), identical saturation voltage (300 mV), and identical transition frequency (250 MHz for RN1902, 200 MHz for RN4902). Toshiba parts maintain 200 mW power dissipation matching the original DDC124EUQ-7-F.

Q: What is the significance of the internal biasing resistor values?

A: The internal biasing resistors (R1 and R2) determine the base current and switching characteristics of the pre-biased transistor. The DDC124EUQ-7-F uses 22 kOhms resistors, while most substitutes use 10 kOhms. Lower resistance values produce higher base current, resulting in faster switching speed and lower saturation voltage. Applications with strict timing requirements or low-loss switching specifications may require evaluation of this parameter.

Q: Are all substitute parts automotive qualified?

A: The DDC124EUQ-7-F carries AEC-Q101 automotive qualification. The substitute parts listed are ROHS3 compliant and active in production status. Specific automotive qualification status for individual substitute parts should be confirmed with the manufacturer if automotive-grade certification is a design requirement.

Q: Can the mixed NPN/PNP parts (PUMD3, RN4902, RN4982) be used in place of the dual NPN DDC124EUQ-7-F?

A: Mixed NPN/PNP parts are functionally compatible only in applications where the circuit design can utilize both transistor types. If the circuit requires two independent NPN transistors, the mixed configuration will not function correctly. For dual NPN requirements, use PUMH11,115, PUMH11F, or RN1902,LF(CT exclusively.

Q: What inventory considerations should guide part selection?

A: The PUMD3,165 offers the highest inventory availability (158,277 units), followed by PUMD3,115 (230,197 units in Cut Tape format). For dual NPN configurations, PUMH11F provides 10,517 units and PUMH11,115 provides 6,300 units. The Toshiba RN1902,LF(CT offers 3,820 units with the closest electrical match to the original DDC124EUQ-7-F. Supply chain requirements should be balanced against electrical performance specifications.

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