PDTC114TK,115 Equivalent & Substitute Parts

Part Overview

The PDTC114TK,115 is a pre-biased NPN bipolar junction transistor (BJT) manufactured by NXP USA Inc. in a surface mount SMT3 package. This component is rated for 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and 250 mW power dissipation. The device features an integrated 10 kOhm base resistor and is designed for general-purpose switching and amplification applications in compact form factors.

The PDTC114TK,115 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transistor topology.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Pre-Biased	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	100	mA
Power - Max	250	mW
Resistor - Base (R1)	10	kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 1mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	150mV @ 500µA, 10mA	—
Current - Collector Cutoff (Max)	1	µA
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the PDTC114TK,115 is determined by the following critical parameters:

Primary Matching Criteria:

Transistor type: NPN - Pre-Biased
Voltage rating: 50 V collector-emitter breakdown (minimum)
Current rating: 100 mA collector current (minimum)
Package compatibility: TO-236-3 / SOT-23-3 surface mount
Base resistor value: 10 kOhms (primary criterion for direct substitution)

Secondary Compatibility Factors:

Power dissipation: 200 mW or greater
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)
Surface mount mounting type

Substitute parts are grouped into two categories:

Category A - Direct Substitutes (10 kOhm Base Resistor): Parts with identical 10 kOhm base resistor configuration: DDTC114GCA-7-F, DDTC114TCA-7-F, DTC114TCA-TP, DTC114TCAT116, DTC114TKAT146, MMUN2211LT1G, MMUN2211LT3G, MMUN2214LT1G.

Category B - Functional Alternatives (Different Base Resistor): Parts with alternative base resistor values that maintain electrical compatibility within the specified voltage and current parameters: DTC143TKAT146 (4.7 kOhm base resistor), DTD114GKT146 (500 mA collector current rating with 10 kOhm emitter-base resistor).

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	Vce Breakdown (Max) V	Base Resistor kOhms	hFE (Min) @ Ic, Vce	Vce Sat (Max) mV	Power (Max) mW	Package
PDTC114TK,115	NXP USA Inc.	Obsolete	100	50	10 (R1)	200 @ 1mA, 5V	150 @ 500µA, 10mA	250	SMT3
DDTC114GCA-7-F	Diodes Incorporated	Active	100	50	10 (R2)	30 @ 5mA, 5V	300 @ 500µA, 10mA	200	SOT-23-3
DDTC114TCA-7-F	Diodes Incorporated	Active	100	50	10 (R1)	100 @ 1mA, 5V	300 @ 100µA, 1mA	200	SOT-23-3
DTC114TCA-TP	Micro Commercial Co	Active	100	50	10 (R1)	100 @ 1mA, 5V	300 @ 1mA, 10mA	200	SOT-23-3
DTC114TCAT116	Rohm Semiconductor	Active	100	50	10 (R1)	100 @ 1mA, 5V	300 @ 1mA, 10mA	200	SST3
DTC114TKAT146	Rohm Semiconductor	Active	100	50	10 (R1)	100 @ 1mA, 5V	300 @ 1mA, 10mA	200	SMT3
DTC143TKAT146	Rohm Semiconductor	Active	100	50	4.7 (R1)	100 @ 1mA, 5V	150 @ 250µA, 5mA	200	SMT3
DTD114GKT146	Rohm Semiconductor	Active	500	50	10 (R2)	56 @ 50mA, 5V	300 @ 2.5mA, 50mA	200	SMT3
MMUN2211LT1G	onsemi	Active	100	50	10 (R1 & R2)	35 @ 5mA, 10V	250 @ 300µA, 10mA	246	SOT-23-3
MMUN2211LT3G	onsemi	Active	100	50	10 (R1 & R2)	35 @ 5mA, 10V	250 @ 300µA, 10mA	246	SOT-23-3
MMUN2214LT1G	onsemi	Active	100	50	10 (R1), 47 (R2)	80 @ 5mA, 10V	250 @ 300µA, 10mA	246	SOT-23-3

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement:

DTC114TKAT146 (Rohm Semiconductor) is the primary recommended substitute. This part maintains identical electrical specifications to the PDTC114TK,115, including 10 kOhm base resistor, 100 mA collector current rating, 50 V breakdown voltage, and SMT3 package configuration. The device is in active production status with high inventory availability (186,620 units in stock) and carries full RoHS3 compliance and REACH unaffected status.

For Alternative Package Configurations:

DDTC114TCA-7-F (Diodes Incorporated) and DTC114TCA-TP (Micro Commercial Co) provide functionally equivalent performance in SOT-23-3 package variants. Both devices maintain the 10 kOhm base resistor and 100 mA / 50 V ratings. These options are suitable when SOT-23-3 package compatibility is required.

For Higher Current Applications:

DTD114GKT146 (Rohm Semiconductor) extends the collector current capability to 500 mA while maintaining the 50 V voltage rating and SMT3 package. This substitute is appropriate for applications requiring increased current handling beyond the original 100 mA specification.

For Lower Base Resistor Applications:

DTC143TKAT146 (Rohm Semiconductor) features a 4.7 kOhm base resistor instead of 10 kOhms, resulting in lower saturation voltage (150 mV vs. 300 mV at comparable test conditions). This substitute is suitable for applications requiring faster switching response or lower saturation characteristics.

All recommended substitutes carry active product status, RoHS3 compliance, and unlimited moisture sensitivity level (MSL 1), ensuring long-term supply chain viability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can DDTC114GCA-7-F be used as a direct replacement for PDTC114TK,115?

A: DDTC114GCA-7-F maintains the same voltage (50 V) and current (100 mA) ratings and SOT-23-3 package compatibility. However, it features a 10 kOhm emitter-base resistor (R2) rather than a base resistor (R1), and exhibits different DC current gain characteristics (30 @ 5mA, 5V vs. 200 @ 1mA, 5V). This part is functionally compatible but operates with different biasing behavior.

Q: What is the difference between DTC114TKAT146 and DDTC114TCA-7-F?

A: DTC114TKAT146 uses an SMT3 package and features a 10 kOhm base resistor (R1) with 100 mA collector current gain at 1 mA. DDTC114TCA-7-F uses a SOT-23-3 package and features a 10 kOhm base resistor (R1) with 100 mA collector current gain at 1 mA. Both are electrically equivalent; the primary difference is package designation and manufacturer (Rohm vs. Diodes Incorporated).

Q: Is DTC143TKAT146 a suitable substitute for the PDTC114TK,115?

A: DTC143TKAT146 is functionally compatible within the 50 V / 100 mA operating envelope. The primary difference is the base resistor value: 4.7 kOhms instead of 10 kOhms. This lower resistance results in faster switching and lower saturation voltage (150 mV vs. 300 mV). Substitution is appropriate only if the application circuit design accommodates the different biasing characteristics.

Q: Why does DTD114GKT146 have a higher collector current rating?

A: DTD114GKT146 is designed for higher current applications, with a maximum collector current of 500 mA compared to 100 mA in the PDTC114TK,115. This device maintains the same 50 V voltage rating and SMT3 package but features different internal transistor geometry and resistor configuration (10 kOhm emitter-base resistor R2). Substitution is appropriate only for applications requiring the extended current capability.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed carry RoHS3 compliance certification. The PDTC114TK,115 original part also maintains RoHS3 compliance status.

Q: What is the difference between MMUN2211LT1G and MMUN2211LT3G?

A: MMUN2211LT1G and MMUN2211LT3G are electrically identical pre-biased NPN transistors with 10 kOhm base and emitter-base resistors. Both maintain 100 mA collector current, 50 V breakdown voltage, and SOT-23-3 package configuration. The designation suffix indicates different tape reel configurations or manufacturing date codes; no functional difference exists between these parts.

Q: Can MMUN2214LT1G replace PDTC114TK,115 directly?

A: MMUN2214LT1G maintains the same voltage (50 V) and current (100 mA) ratings and SOT-23-3 package compatibility. The primary difference is the resistor configuration: 10 kOhm base resistor (R1) and 47 kOhm emitter-base resistor (R2), compared to the original 10 kOhm base resistor only. This configuration results in different biasing behavior and is suitable only if the application circuit design accommodates the modified resistor network.

Q: What inventory considerations should guide substitute part selection?

A: DTC114TKAT146 offers the highest inventory availability (186,620 units in stock), followed by DTC143TKAT146 (365,200 units). MMUN2211LT1G and MMUN2211LT3G (onsemi) provide combined inventory exceeding 2.5 million units. For applications requiring immediate availability and long-term supply security, DTC114TKAT146 or DTC143TKAT146 are preferred selections.

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