Equivalent & Substitute Parts for 2SA1900T100Q

Part Overview

The 2SA1900T100Q by Rohm Semiconductor is a PNP bipolar junction transistor (BJT) specified for 50V collector-emitter breakdown voltage, 1A collector current, and 2W maximum power dissipation, housed in a surface mount MPT3 package. The device features a transition frequency of 150MHz and operates up to 150°C junction temperature. It is categorized as Transistors, Bipolar (BJT), and is currently listed as Not For New Designs, necessitating explicit evaluation of alternative models for ongoing and future applications.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	1 A
Voltage - Collector Emitter Breakdown (Max)	50 V
Vce Saturation (Max) @ Ib, Ic	400mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 500mA, 3V
Power - Max	2 W
Frequency - Transition	150MHz
Operating Temperature	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-243AA
Supplier Device Package	MPT3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution for 2SA1900T100Q in the transistors, bipolar (BJT) category is determined strictly by matching the following key parameters: PNP polarity, collector-emitter breakdown voltage (minimum 50V), maximum collector current (minimum 1A), maximum power dissipation, package compatibility (surface mount, TO-243AA form factor), and equivalent RoHS and REACH environmental statuses. Devices must also meet or exceed key electrical performance metrics as provided: Vce(sat), ICBO, hFE, transition frequency, and maximum operating temperature.

Parameter Comparison

Part Number	Manufacturer	Transistor Type	Ic (Max)	Vce Breakdown (Max)	Vce Saturation (Max) @ Ib, Ic	ICBO (Max)	hFE (Min) @ Ic, Vce	Power Max	Transition Frequency	Operating Temp (Max)	Mounting Type	Package / Case	Device Package	RoHS Status	MSL	REACH Status
2SA1900T100Q	Rohm Semiconductor	PNP	1 A	50 V	400mV @ 50mA, 500mA	100nA	120 @ 500mA, 3V	2 W	150MHz	150°C	Surface Mount	TO-243AA	MPT3	ROHS3	1	Unaffected
2SAR553PT100	Rohm Semiconductor	PNP	2 A	50 V	400mV @ 35mA, 700mA	1µA	180 @ 50mA, 2V	2 W	320MHz	150°C	Surface Mount	TO-243AA	MPT3	ROHS3	1	Unaffected
BSR31,115	Nexperia USA Inc.	PNP	1 A	60 V	500mV @ 50mA, 500mA	100nA	100 @ 100mA, 5V	1.35 W	100MHz	150°C	Surface Mount	TO-243AA	SOT-89	ROHS3	1	Unaffected
2SA2070(TE12L,F)	Toshiba Semiconductor and Storage	PNP	1 A	50 V	200mV @ 10mA, 300mA	100nA	200 @ 100mA, 2V	1 W	-	150°C	Surface Mount	TO-243AA	PW-MINI	ROHS3	1	Unaffected
2SB1122T-TD-E	onsemi	PNP	1 A	50 V	500mV @ 50mA, 500mA	100nA	100 @ 100mA, 2V	500 mW	150MHz	150°C	Surface Mount	TO-243AA	PCP	ROHS3	1	Unaffected
2SB1123T-TD-E	onsemi	PNP	2 A	50 V	700mV @ 50mA, 1A	100nA	200 @ 100mA, 2V	500 mW	150MHz	150°C	Surface Mount	TO-243AA	PCP	ROHS3	1	Unaffected

Engineering Selection Recommendations

When selecting substitutes for 2SA1900T100Q, use only devices with ROHS3 compliance, MSL 1 rating, and REACH Unaffected status as listed in the comparison table. Confirm the product status field, selecting only active or directly listed parts unless otherwise specified by application requirements.

Frequently Asked Questions (FAQ)

Q1: What parameters are critical when selecting substitute BJTs for 2SA1900T100Q?
A1: Core parameters include transistor polarity (PNP), collector-emitter breakdown voltage (at least 50V), maximum collector current (minimum 1A), maximum power dissipation, electrical characteristics (Vce(sat), ICBO, hFE), frequency response, operating temperature, and surface-mount package compatibility.

Q2: Are all the listed substitutes compatible in terms of package and mounting type?
A2: All parts are surface-mount and utilize the TO-243AA package or a direct variant (MPT3, SOT-89, PW-MINI, PCP). Device supplier package variations should be matched with board design requirements.

Q3: Does product status affect substitute suitability?
A3: Yes. Substitute parts in "Active" product status should be prioritized for new or ongoing designs to ensure long-term availability.

Q4: Are environmental and compliance certifications equivalent across the listed substitutes?
A4: All compared devices are ROHS3 compliant, REACH Unaffected, and have an MSL rating of 1 (Unlimited), ensuring similar compliance levels.

Q5: How is DC current gain (hFE) matched for substitution?
A5: Substitutes are selected with a specified minimum DC current gain at defined operating points as explicitly listed in the table, ensuring overlap with the main part requirements.

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