PDTC114EE,115 Equivalent & Substitute Parts Reference

Part Overview

The PDTC114EE,115 is a pre-biased NPN bipolar junction transistor (BJT) manufactured by NXP USA Inc., designed for surface mount applications in the SC-75 (SOT-416) package. This component integrates internal base and emitter resistors, enabling simplified circuit design for switching and amplification applications. The device is rated for 50 V collector-emitter breakdown voltage and 100 mA maximum collector current with 150 mW power dissipation.

The PDTC114EE,115 is classified as obsolete. Equivalent and substitute parts from active manufacturers are available to support ongoing production requirements and design continuity. Substitute selection depends on matching critical electrical parameters including collector current rating, breakdown voltage, internal resistor values, and saturation characteristics.

Key Parameters

Parameter	PDTC114EE,115 Value	Unit
Transistor Type	NPN - Pre-Biased	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	10	kOhms
Resistor - Emitter Base (R2)	10	kOhms
DC Current Gain (hFE) Min @ Ic, Vce	30 @ 5mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	150 @ 500µA, 10mA	mV
Current - Collector Cutoff (Max)	1	µA
Frequency - Transition	230	MHz
Power - Max	150	mW
Package / Case	SC-75, SOT-416	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the PDTC114EE,115 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Collector-emitter breakdown voltage: 50 V (all substitutes match)
Transistor type: NPN pre-biased configuration
Internal resistor network: R1 and R2 values determine switching behavior and bias point
Maximum collector current: 100 mA baseline, with lower-rated alternatives acceptable for current-limited applications
Package compatibility: SC-75 (SOT-416) or functionally equivalent packages (SOT-523, EMT3)
Surface mount mounting type

Substitution Logic:

Parts are classified into two categories based on resistor configuration and current rating:

Category A - Direct Electrical Equivalents (R1=10kΩ, R2=10kΩ, Ic=100mA): These parts maintain identical internal resistor values and full 100 mA collector current rating, ensuring drop-in compatibility with minimal circuit impact.

Category B - Modified Resistor Configuration (R1=10kΩ, R2=47kΩ, or alternative R1/R2 values): These parts feature different internal resistor networks, resulting in altered bias characteristics and switching thresholds. Selection requires circuit-level analysis to confirm functional compatibility.

Category C - Reduced Current Rating (Ic < 100mA): These parts are suitable for applications where collector current requirements are lower than 100 mA, provided the specific application current does not exceed the substitute part's rating.

Parameter Comparison

Part Number	Manufacturer	Ic Max (mA)	Vce Breakdown (V)	R1 (kΩ)	R2 (kΩ)	hFE Min @ 5mA	Vce Sat (mV)	Package	Status
PDTC114EE,115	NXP USA Inc.	100	50	10	10	30	150	SC-75	Obsolete
DTC114EET1G	onsemi	100	50	10	10	35	250	SC-75	Active
DDTC114GE-7-F	Diodes Incorporated	100	50	—	10	30	300	SOT-523	Active
DDTC114YE-7-F	Diodes Incorporated	100	50	10	47	68	300	SOT-523	Active
DTC114EETL	Rohm Semiconductor	50	50	10	10	30	300	EMT3	Active
DTC114TET1G	onsemi	100	50	10	—	160	250	SC-75	Active
DTC114YET1G	onsemi	100	50	10	47	80	250	SC-75	Active
DTC114YETL	Rohm Semiconductor	70	50	10	47	68	300	EMT3	Active
DTC115EETL	Rohm Semiconductor	20	50	100	100	82	300	EMT3	Active
DTC123EETL	Rohm Semiconductor	100	50	2.2	2.2	20	300	EMT3	Active
DTC124EETL	Rohm Semiconductor	30	50	22	22	56	300	EMT3	Active

Engineering Selection Recommendations

Primary Substitute - Category A (Direct Equivalent):

DTC114EET1G (onsemi) is the recommended primary substitute. This part maintains identical internal resistor configuration (R1=10kΩ, R2=10kΩ) and 100 mA collector current rating. The part is in active production status with high inventory availability (161,200 units). RoHS3 compliance and MSL-1 rating match the original specification. The higher Vce saturation (250 mV vs. 150 mV) and lower cutoff current (500 nA vs. 1 µA) represent acceptable performance variations within typical circuit tolerances.

Secondary Substitute - Category A (SC-75 Package):

DTC114TET1G (onsemi) provides SC-75 package compatibility with 100 mA rating and 10 kΩ base resistor. This part features elevated hFE (160 @ 5mA) compared to the original (30 @ 5mA), which may affect switching speed and bias point in sensitive applications. Inventory is limited (7,961 units).

Alternative Substitute - Modified Resistor Configuration:

DTC114YET1G (onsemi) offers 100 mA rating in SC-75 package with modified emitter-base resistor (R2=47kΩ vs. 10kΩ). This configuration increases DC current gain (80 @ 5mA) and alters bias characteristics. Selection requires circuit verification to confirm functional compatibility.

Reduced Current Rating Alternatives:

DTC114EETL (Rohm Semiconductor) and DTC114YETL (Rohm Semiconductor) are suitable only for applications where collector current does not exceed 50 mA and 70 mA respectively. These parts use EMT3 package (functionally equivalent to SC-75) and are in active production with high inventory.

Compliance Verification:

All recommended substitutes maintain RoHS3 compliance, MSL-1 rating, and REACH unaffected status. All parts are classified as EAR99 for export control purposes.

Frequently Asked Questions (FAQ)

Q1: Can DTC114EET1G directly replace PDTC114EE,115 without circuit modification?

DTC114EET1G maintains identical internal resistor values (R1=10kΩ, R2=10kΩ) and collector current rating (100 mA). The part is mechanically and electrically compatible for direct substitution. Minor differences in Vce saturation and cutoff current are within acceptable engineering tolerances for most applications.

Q2: What is the difference between parts with R2=10kΩ and R2=47kΩ?

The emitter-base resistor (R2) value directly affects the bias network and DC current gain. Parts with R2=47kΩ (such as DTC114YET1G and DDTC114YE-7-F) exhibit higher hFE and different switching thresholds compared to R2=10kΩ variants. Circuit-level analysis is required to confirm functional compatibility when switching between these configurations.

Q3: Are SOT-523 package parts (DDTC114GE-7-F, DDTC114YE-7-F) compatible with SC-75 footprints?

No. SOT-523 and SC-75 (SOT-416) are physically distinct packages with different pin configurations and footprints. PCB layout modification is required for package substitution. Verify mechanical compatibility before design implementation.

Q4: Can DTC114EETL (50 mA rating) be used in place of PDTC114EE,115 (100 mA rating)?

DTC114EETL is suitable only for applications where the actual collector current requirement does not exceed 50 mA. If the circuit design requires 100 mA capability, this part is not appropriate. Verify application current requirements before selection.

Q5: What does "pre-biased" mean in the context of these transistors?

Pre-biased transistors integrate internal resistor networks (R1 between base and collector, R2 between emitter and base) that establish a defined bias point without external resistors. This simplifies circuit design and reduces component count. The specific R1 and R2 values determine the bias characteristics and must be matched to application requirements.

Q6: Are all substitute parts RoHS3 compliant?

Yes. All substitute parts listed in this reference maintain RoHS3 compliance and are suitable for applications requiring lead-free, halogen-free construction.

Q7: What is the significance of the "E" and "Y" designations in part numbers (DTC114EET1G vs. DTC114YET1G)?

The letter designation typically indicates the internal resistor configuration. "E" variants generally feature R1=R2=10kΩ, while "Y" variants feature R1=10kΩ, R2=47kΩ. Consult manufacturer datasheets to confirm specific resistor values for each designation.

Q8: Which substitute offers the best inventory availability?

DTC124EETL (Rohm Semiconductor) has the highest inventory level at 905,200 units. However, this part features different resistor values (R1=R2=22kΩ) and reduced current rating (30 mA), making it suitable only for specific applications. For direct PDTC114EE,115 replacement, DTC114EET1G (161,200 units) offers the best combination of availability and electrical compatibility.

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