DTC144GKAT146 Equivalent & Substitute Parts Reference

Part Overview

The Rohm Semiconductor DTC144GKAT146 is a surface mount NPN pre-biased bipolar junction transistor (BJT) rated for 50 V, 100 mA, and 200 mW, housed in an SMT3 (TO-236-3, SC-59, SOT-23-3) package. This product is noted as "Not For New Designs," making it necessary to identify fully compatible alternative and substitute models for new designs or ongoing manufacturing support.

Key Parameters

Parameter	Value
Transistor Type	NPN - Pre-Biased
Voltage - Collector Emitter Breakdown (Max)	50 V
Current - Collector (Ic) (Max)	100 mA
Resistor - Emitter Base (R2)	47 kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce	68 @ 5mA, 5V
Vce Saturation (Max) @ Ib, Ic	300 mV @ 500µA, 10mA
Current - Collector Cutoff (Max)	500 nA (ICBO)
Frequency - Transition	250 MHz
Power - Max	200 mW
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SMT3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution is determined strictly by the following parameters:

Transistor type (NPN - Pre-Biased)
Maximum voltage between collector and emitter (50 V)
Maximum collector current (100 mA)
Bias resistor value (R2)
Minimum DC current gain (hFE) at specified Ic and Vce
Maximum collector cutoff current (ICBO)
Power dissipation rating (minimum required: 200 mW)
Package equivalence (TO-236-3, SC-59, SOT-23-3, SMT3)
Mounting type (Surface Mount)
Environmental compliance (RoHS/REACH)
Moisture Sensitivity Level Only components that match these criteria can be considered direct equivalents or substitutes for the DTC144GKAT146 in applications where strict interchangeability is required.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Transistor Type	Vce (Max)	Ic (Max)	Resistor - Emitter Base (R2)	hFE (Min) @ Ic, Vce	Vce(sat) (Max) @ Ib, Ic	ICBO (Max)	fT	Pd (Max)	Mounting Type	Package	Supplier Device Package	RoHS Status	MSL	REACH Status
DTC144GKAT146	Rohm Semiconductor	NPN - Pre-Biased	50 V	100 mA	47 kOhms	68 @ 5mA, 5V	300 mV @ 500µA, 10mA	500 nA	250 MHz	200 mW	Surface Mount	TO-236-3, SC-59, SOT-23-3	SMT3	ROHS3	1	REACH Unaffected
DDTC144GCA-7-F	Diodes Incorporated	NPN - Pre-Biased	50 V	100 mA	47 kOhms	68 @ 5mA, 5V	300 mV @ 500µA, 10mA	500 nA	250 MHz	200 mW	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3	ROHS3	1	REACH Unaffected
RN1413(TE85L,F)	Toshiba Semiconductor and Storage	NPN - Pre-Biased	50 V	100 mA	47 kOhms	120 @ 1mA, 5V	300 mV @ 250µA, 5mA	100 nA	250 MHz	200 mW	Surface Mount	TO-236-3, SC-59, SOT-23-3	S-Mini	RoHS	1	-
MUN2240T1G	onsemi	NPN - Pre-Biased	50 V	100 mA	47 kOhms	120 @ 5mA, 10V	250 mV @ 1mA, 10mA	500 nA	-	338 mW	Surface Mount	TO-236-3, SC-59, SOT-23-3	SC-59	ROHS3	1	REACH Unaffected
PDTC144TT,215	Nexperia USA Inc.	NPN - Pre-Biased	50 V	100 mA	47 kOhms	100 @ 1mA, 5V	150 mV @ 500µA, 10mA	1 µA	250 MHz	250 mW	Surface Mount	TO-236-3, SC-59, SOT-23-3	TO-236AB	ROHS3	1	REACH Unaffected
DTC144TCA-TP	Micro Commercial Co	NPN - Pre-Biased	50 V	100 mA	47 kOhms	100 @ 1mA, 5V	300 mV @ 1mA, 10mA	500 nA	250 MHz	200 mW	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23	ROHS3	1	REACH Unaffected

Engineering Selection Recommendations

For new designs or replacement in manufacturing, select only parts with matching RoHS compliance (ROHS3 Compliant, RoHS Compliant), REACH status (REACH Unaffected), and Moisture Sensitivity Level (MSL 1—Unlimited). Selection is recommended only for parts marked as Active or equivalent in product status. Avoid parts not meeting environmental or compliance requirements listed in the Key Parameters.

Frequently Asked Questions (FAQ)

Q1: What criteria are crucial when substituting the DTC144GKAT146?
A1: Substitution requires identical NPN pre-biased transistor type, maximum voltage (50 V), maximum collector current (100 mA), emitter-base resistor value (47 kOhms), minimum DC current gain, collector cutoff current, power dissipation, package compatibility (TO-236-3, SC-59, SOT-23-3, SMT3), mounting type, and environmental compliance.

Q2: Are all packages interchangeable?
A2: All listed substitute parts are offered in package types TO-236-3, SC-59, SOT-23-3, SOT-23, S-Mini, or equivalent; these are functionally compatible for automated surface mount processes provided footprint and pick-and-place considerations are met.

Q3: Is it necessary to match the bias resistor (R2) value?
A3: For direct replacement, the R2 value must match (47 kOhms) to ensure identical circuit operation.

Q4: Can I use a part with higher power rating than the original DTC144GKAT146?
A4: Parts with higher maximum power rating are included if all other parameters match; exceeding the minimum is allowed within the same category.

Q5: What about compliance and certifications?
A5: Only parts with equivalent or superior RoHS and REACH compliance and same or lower MSL are listed as substitutes.

Q6: Why must environmental and compliance parameters be matched?
A6: Matching RoHS, REACH, and MSL ensures compatibility with existing manufacturing and global regulatory requirements for direct product substitution.

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