DSA2401R0L Equivalent & Substitute Parts

Part Overview

The DSA2401R0L is a Panasonic Electronic Components PNP bipolar junction transistor (BJT) rated for 10 V collector-emitter breakdown voltage and 500 mA maximum collector current. This surface mount device is housed in a TO-236-3 (SOT-23-3) package and delivers 200 mW maximum power dissipation with a transition frequency of 250 MHz. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility within specified application parameters.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	500	mA
Voltage - Collector Emitter Breakdown (Max)	10	V
Power - Max	200	mW
Frequency - Transition	250	MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
Operating Temperature (Max)	150	°C
RoHS Status	RoHS Compliant	—

Substitute Part Grouping Explanation

Substitution of the DSA2401R0L is determined by strict equivalence across the following critical parameters:

Mandatory Electrical Compatibility:

Transistor polarity: PNP configuration
Maximum collector current: 500 mA or greater
Maximum power dissipation: 200 mW or greater
Transition frequency: 250 MHz or greater
Operating temperature range: 150°C or greater

Mandatory Mechanical Compatibility:

Package type: TO-236-3, SC-59, or SOT-23-3 surface mount package
Mounting method: Surface mount technology

Regulatory Compliance:

RoHS compliance status must be documented

The 2SA2119KT146 manufactured by Rohm Semiconductor meets all mandatory electrical and mechanical parameters. This part exceeds the DSA2401R0L in collector-emitter breakdown voltage (12 V versus 10 V), transition frequency (260 MHz versus 250 MHz), and DC current gain specifications, while maintaining identical maximum collector current (500 mA), power dissipation (200 mW), and package form factor (SOT-23-3).

Parameter Comparison

Parameter	DSA2401R0L (Panasonic)	2SA2119KT146 (Rohm)	Unit
Transistor Type	PNP	PNP	—
Current - Collector (Ic) Max	500	500	mA
Voltage - Collector Emitter Breakdown (Max)	10	12	V
Vce Saturation (Max) @ Ib, Ic	300mV @ 8mA, 400mA	250mV @ 10mA, 200mA	V
Current - Collector Cutoff (Max)	100	100	nA
Power - Max	200	200	mW
Frequency - Transition	250	260	MHz
Operating Temperature (Max)	150	150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	Surface Mount	—
RoHS Status	RoHS Compliant	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

The 2SA2119KT146 is a direct functional substitute for the discontinued DSA2401R0L. Both devices are RoHS compliant and maintain identical moisture sensitivity ratings (MSL 1). The substitute part demonstrates superior electrical performance in collector-emitter breakdown voltage and transition frequency, with equivalent maximum ratings for collector current and power dissipation. Both parts are housed in identical SOT-23-3 surface mount packages, ensuring mechanical compatibility without PCB redesign.

The 2SA2119KT146 is currently in active production status with substantial inventory availability (12,100 pieces), whereas the DSA2401R0L is discontinued. Selection of the Rohm device eliminates supply chain risk while maintaining full electrical and mechanical compatibility within the specified application envelope.

Frequently Asked Questions (FAQ)

Q: Can the 2SA2119KT146 directly replace the DSA2401R0L without circuit modification?

A: Yes. Both devices are PNP transistors in SOT-23-3 packages with identical maximum collector current (500 mA) and power dissipation (200 mW). The 2SA2119KT146 exceeds the DSA2401R0L in breakdown voltage and transition frequency, making it suitable for applications designed for the original part.

Q: What is the significance of the higher collector-emitter breakdown voltage in the 2SA2119KT146?

A: The 2SA2119KT146 is rated for 12 V breakdown voltage compared to 10 V for the DSA2401R0L. This provides additional voltage margin in applications operating near the maximum rating of the original part. Applications designed for 10 V operation remain fully compatible.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both the DSA2401R0L and 2SA2119KT146 use the TO-236-3 (SOT-23-3) surface mount package. No PCB layout modifications are required for substitution.

Q: What is the difference in saturation voltage between these devices?

A: The DSA2401R0L specifies 300 mV saturation voltage at 8 mA base current and 400 mA collector current. The 2SA2119KT146 specifies 250 mV saturation voltage at 10 mA base current and 200 mA collector current. The lower saturation voltage of the substitute part indicates improved switching performance at lower collector currents.

Q: Are both parts RoHS compliant?

A: Yes. The DSA2401R0L carries RoHS Compliant certification. The 2SA2119KT146 carries ROHS3 Compliant certification, which represents an updated compliance standard. Both parts meet RoHS requirements.

Q: What is the moisture sensitivity level for these transistors?

A: Both the DSA2401R0L and 2SA2119KT146 are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message