2SAR523UBTL Equivalent & Substitute Parts Reference

Part Overview

The 2SAR523UBTL from Rohm Semiconductor is a PNP bipolar junction transistor (BJT) in the Transistors, Bipolar (BJT) category, offered in surface-mount UMT3F (SC-85) packaging. It features a 50 V maximum collector-emitter voltage, 100 mA maximum collector current, 200 mW power dissipation, and 300 MHz transition frequency. It is ROHS3 Compliant, has a moisture sensitivity level of 1, and is currently listed as Active.

Considering inventory management, design lifecycle, and potential supply chain issues, it is important to identify alternative models and substitutes with identical or closely aligned electrical and mechanical parameters to maintain uninterrupted production and simplify component qualification.

Key Parameters

Parameter	2SAR523UBTL
Transistor Type	PNP
Voltage - Collector Emitter Breakdown (Max)	50 V
Current - Collector (Ic) (Max)	100 mA
Vce Saturation (Max) @ Ib, Ic	400mV @ 5mA, 50mA
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 1mA, 6V
Current - Collector Cutoff (Max) (ICBO)	100nA
Power - Max	200 mW
Frequency - Transition	300MHz
Operating Temperature	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	SC-85
Supplier Device Package	UMT3F
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts are selected based on matching critical electrical parameters, package compatibility, and qualification criteria. The primary parameters considered for equivalency include:

Transistor type (PNP)
Maximum collector-emitter breakdown voltage (50 V)
Maximum collector current (≥100 mA)
Maximum Vce saturation voltage
Minimum DC gain (hFE)
Maximum collector cutoff current
Maximum power dissipation (200 mW)
Package style and mounting type (surface-mount, compatible supplier device package)
Compliance (RoHS, REACH)
Only parts strictly matching or exceeding these specifications within the provided data are included as substitutes.

Parameter Comparison

Parameter	2SAR523UBTL (Rohm Semiconductor)	2SA1576UBTLR (Rohm Semiconductor)	2PA1576R,115 (Nexperia USA Inc.)	2PA1576S,115 (Nexperia USA Inc.)	2PB1219AS,115 (Nexperia USA Inc.)
Transistor Type	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	50 V	50 V	50 V	50 V	50 V
Current - Collector (Ic) (Max)	100 mA	150 mA	150 mA	150 mA	500 mA
Vce Saturation (Max) @ Ib, Ic	400mV @ 5mA, 50mA	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	600mV @ 30mA, 300mA
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 1mA, 6V	120 @ 1mA, 6V	180 @ 1mA, 6V	270 @ 1mA, 6V	170 @ 150mA, 10V
Current - Collector Cutoff (Max) (ICBO)	100nA	100nA	100nA	100nA	100nA
Power - Max	200 mW	200 mW	200 mW	200 mW	200 mW
Frequency - Transition	300MHz	140MHz	100MHz	100MHz	140MHz
Operating Temperature	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-85	SC-85	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323
Supplier Device Package	UMT3F	UMT3F	SOT-323	SOT-323	SOT-323
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Not For New Designs	Active	Active	Active

Engineering Selection Recommendations

The 2SAR523UBTL is Active, ROHS3 Compliant, and REACH Unaffected.
All listed substitutes are ROHS3 Compliant and REACH Unaffected with identical moisture sensitivity levels (MSL 1).
Substitute product status varies: 2SA1576UBTLR is Not For New Designs; the other substitute parts are Active.
Alternate package styles are included; confirm device package compatibility with UMT3F (SC-85) or SOT-323 (SC-70) as required for mechanical or PCB fit.
Automotive grade or qualification (AEC-Q101) is provided for Nexperia 2PA1576R,115, 2PA1576S,115, and 2PB1219AS,115.

Frequently Asked Questions (FAQ)

Q1: What criteria determine suitable substitutes for the 2SAR523UBTL?
A1: Substitute selection is based on the following parameters: transistor type (PNP), maximum collector-emitter voltage (50 V), maximum collector current (≥100 mA), power dissipation (200 mW), package compatibility, RoHS/REACH compliance, operating temperature, and moisture sensitivity level.

Q2: How important is package compatibility when choosing a substitute?
A2: Package and supplier device package (UMT3F, SC-85, or SOT-323, SC-70) directly affect PCB mounting. Ensure the substitute's mechanical footprint aligns with the application layout.

Q3: Are there substitutes with higher current or gain?
A3: Yes. Substitute parts include versions rated for up to 500 mA (2PB1219AS,115) and higher minimum DC current gain (e.g., 270 for 2PA1576S,115). All other critical parameters are also considered.

Q4: Do all substitutes share environmental and compliance certifications?
A4: All listed alternatives are ROHS3 Compliant, REACH Unaffected, and have an unlimited moisture sensitivity level.

Q5: How do differences in transition frequency, Vce saturation, or DC gain impact equivalency?
A5: All parts match or exceed the specified electrical requirements. However, for applications with strict frequency or saturation voltage demands, cross-check against the specific values provided in the comparison table.

Q6: Can automotive-qualified substitutes be used for non-automotive designs?
A6: Automotive qualification is optional; these parts can be used in non-automotive applications if all other parameters are compatible.

Q7: What if the main device or a substitute is Not For New Designs?
A7: For new projects or long-term supply considerations, select only parts with an Active product status per the table above.

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