DTC123JCA-TP Equivalent & Substitute Parts

Part Overview

The DTC123JCA-TP is a pre-biased NPN bipolar junction transistor (BJT) manufactured by Micro Commercial Co, designed for surface mount applications in the SOT-23 package. This component operates at 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and transition frequency of 250 MHz. The part is actively produced and ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and manufacturing optimization. Alternative sources from qualified manufacturers provide functionally compatible solutions while maintaining electrical and mechanical specifications within acceptable engineering tolerances.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Pre-Biased	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	2.2	kOhms
DC Current Gain (hFE) Min @ Ic, Vce	80 @ 10mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	300mV @ 250µA, 5mA	—
Current - Collector Cutoff (Max)	500	nA
Frequency - Transition	250	MHz
Power - Max	200	mW
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the DTC123JCA-TP are qualified based on the following critical parameters:

Electrical Compatibility Criteria:

Transistor type: NPN pre-biased configuration
Maximum collector current: 100 mA
Collector-emitter breakdown voltage: 50 V
Base resistor (R1): 2.2 kOhms
DC current gain minimum: 80 (at specified test conditions)
Vce saturation: 300 mV or lower (at specified test conditions)
Collector cutoff current: 500 nA or lower
Transition frequency: 250 MHz or higher
Power dissipation: 200 mW or higher

Mechanical Compatibility Criteria:

Package type: TO-236-3 / SC-59 / SOT-23-3 footprint
Mounting type: Surface mount
Lead configuration: 3-pin

Compliance Criteria:

RoHS3 compliance
MSL rating: 1 (Unlimited)
Active product status

Substitute parts are grouped into three categories: direct equivalents (identical specifications), upgrades (enhanced performance characteristics), and similar alternatives (functionally compatible with minor specification variations).

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	R1 kOhms	hFE Min	Vce Sat (Max) mV	Icbo (Max) nA	Freq MHz	Power mW	Package
DTC123JCA-TP	Micro Commercial Co	100	50	2.2	80 @ 10mA, 5V	300 @ 250µA, 5mA	500	250	200	SOT-23
DTC123JCAT116	Rohm Semiconductor	100	50	2.2	80 @ 10mA, 5V	300 @ 250µA, 5mA	500	250	200	SST3
DTC123JKAT146	Rohm Semiconductor	100	50	2.2	80 @ 10mA, 5V	300 @ 250µA, 5mA	500	250	200	SMT3
RN1405,LF	Toshiba Semiconductor and Storage	100	50	2.2	80 @ 10mA, 5V	300 @ 250µA, 5mA	500	250	200	S-Mini
DDTC123JCA-7-F	Diodes Incorporated	100	50	2.2	80 @ 10mA, 5V	300 @ 250µA, 5mA	500	250	200	SOT-23-3
MMUN2235LT1G	onsemi	100	50	2.2	80 @ 5mA, 10V	250 @ 1mA, 10mA	500	—	246	SOT-23-3
NSVMMUN2235LT1G	onsemi	100	50	2.2	80 @ 5mA, 10V	250 @ 1mA, 10mA	500	—	246	SOT-23-3
PDTC123JT,215	Nexperia USA Inc.	100	50	2.2	100 @ 10mA, 5V	100 @ 250µA, 5mA	1000	—	250	TO-236AB

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Specifications):

The DTC123JCAT116 (Rohm Semiconductor), DTC123JKAT146 (Rohm Semiconductor), and RN1405,LF (Toshiba Semiconductor and Storage) provide direct electrical equivalence to the DTC123JCA-TP. These parts maintain identical collector current, breakdown voltage, base resistor value, current gain, saturation voltage, and transition frequency specifications. All three are ROHS3 compliant with MSL 1 rating and active product status. Selection among these direct equivalents is determined by packaging format availability (SST3, SMT3, or S-Mini) and supply chain requirements.

Upgrade Alternative (Enhanced Performance):

The DDTC123JCA-7-F (Diodes Incorporated) is classified as an upgrade substitute, maintaining all electrical specifications of the main part while offering enhanced availability (23,200 units in stock) and SOT-23-3 package standardization. This part is suitable for applications requiring higher volume production or standardized packaging across multiple designs.

Similar Alternatives (Functionally Compatible with Specification Variations):

The MMUN2235LT1G and NSVMMUN2235LT1G (both onsemi) are functionally compatible alternatives with the following variations: DC current gain is specified at different test conditions (5 mA, 10 V versus 10 mA, 5 V), Vce saturation is lower (250 mV versus 300 mV), and collector cutoff current is higher (500 nA versus 1 µA for PDTC123JT,215). The NSVMMUN2235LT1G includes automotive-grade qualification (AEC-Q101) for applications requiring automotive reliability standards. Power dissipation is rated at 246 mW, exceeding the 200 mW specification of the main part.

The PDTC123JT,215 (Nexperia USA Inc.) offers enhanced performance with higher DC current gain (100 minimum), significantly lower Vce saturation (100 mV), and higher power rating (250 mW). Collector cutoff current is specified at 1 µA, representing a relaxation from the 500 nA specification. This part is suitable for applications where improved saturation characteristics and higher current gain provide design advantages.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and active product status. Selection should be based on specific application requirements, packaging constraints, and supply availability.

Frequently Asked Questions (FAQ)

Q: Can DTC123JCAT116 be used as a direct replacement for DTC123JCA-TP?

A: Yes. The DTC123JCAT116 maintains identical electrical specifications including collector current (100 mA), breakdown voltage (50 V), base resistor (2.2 kOhms), DC current gain (80 minimum), and saturation voltage (300 mV). The primary difference is the package format (SST3 versus SOT-23). Both are surface mount, three-pin configurations with identical footprint dimensions. Verification of PCB assembly equipment compatibility with the SST3 package designation is required.

Q: What is the difference between DTC123JKAT146 and DTC123JCAT116?

A: Both parts are manufactured by Rohm Semiconductor and maintain identical electrical specifications. The distinction is in the supplier device package designation: DTC123JKAT146 uses SMT3 packaging while DTC123JCAT116 uses SST3 packaging. Both are compatible with TO-236-3 / SC-59 / SOT-23-3 footprints. Selection depends on assembly equipment specifications and supplier availability.

Q: Is MMUN2235LT1G a suitable substitute for DTC123JCA-TP?

A: The MMUN2235LT1G is functionally compatible with specification variations. It maintains the same collector current (100 mA), breakdown voltage (50 V), and base resistor (2.2 kOhms). However, DC current gain is specified at different test conditions (5 mA, 10 V versus 10 mA, 5 V), Vce saturation is lower (250 mV versus 300 mV), and power dissipation is higher (246 mW versus 200 mW). These variations represent improved performance characteristics suitable for applications where lower saturation voltage is beneficial.

Q: What is the advantage of NSVMMUN2235LT1G over MMUN2235LT1G?

A: The NSVMMUN2235LT1G is qualified to automotive-grade standards (AEC-Q101) and carries automotive-grade designation. Electrical specifications are identical to the MMUN2235LT1G. Selection of the NSVMMUN2235LT1G is required for applications subject to automotive reliability and qualification requirements.

Q: How does PDTC123JT,215 differ from the main part DTC123JCA-TP?

A: The PDTC123JT,215 offers enhanced performance with higher DC current gain (100 minimum versus 80 minimum), significantly lower Vce saturation (100 mV versus 300 mV), and higher power dissipation rating (250 mW versus 200 mW). Collector cutoff current is specified at 1 µA versus 500 nA. These characteristics make PDTC123JT,215 suitable for applications requiring improved saturation performance and higher current gain, though the relaxed cutoff current specification should be evaluated against application leakage requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the DTC123JCA-TP.

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

A: Substitute parts are available in the following package formats: SOT-23 (DTC123JCA-TP), SST3 (DTC123JCAT116), SMT3 (DTC123JKAT146), S-Mini (RN1405,LF), SOT-23-3 (DDTC123JCA-7-F, MMUN2235LT1G, NSVMMUN2235LT1G), and TO-236AB (PDTC123JT,215). All are surface mount configurations with three-pin leads compatible with TO-236-3 / SC-59 / SOT-23-3 footprints. PCB assembly equipment must support the specific package designation selected.

Q: Which substitute part has the highest inventory availability?

A: The PDTC123JT,215 (Nexperia USA Inc.) has the highest inventory availability at 105,052 units in stock, followed by DTC123JKAT146 (Rohm Semiconductor) at 50,400 units. The main part DTC123JCA-TP has 1,019 units available.

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