BSR33-TP Equivalent & Substitute Parts

Part Overview

The BSR33-TP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for interface applications in surface mount configurations. This component operates at 80 V collector-emitter breakdown voltage with a maximum collector current of 1 A and 500 mW power dissipation. The BSR33-TP is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Identifying equivalent and substitute parts is necessary for legacy system support, maintenance, and repair applications where the original component may no longer be readily available or where design flexibility permits component selection from active product lines.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	1	A
Voltage - Collector Emitter Breakdown (Max)	80	V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 100mA, 5V	—
Power - Max	500	mW
Frequency - Transition	100	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA (SOT-89)	—

Substitute Part Grouping Explanation

Substitution of the BSR33-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Transistor Type: PNP
Current - Collector (Ic) Max: 1 A
Voltage - Collector Emitter Breakdown (Max): 80 V
Vce Saturation (Max) @ Ib, Ic: 500mV @ 50mA, 500mA
Current - Collector Cutoff (Max): 100nA (ICBO)
Mounting Type: Surface Mount
Package / Case: TO-243AA (SOT-89)

Parameters Permitting Variation:

DC Current Gain (hFE): Substitute parts may have different minimum hFE values at different test conditions
Power - Max: Substitute parts may have equal or higher power ratings
Frequency - Transition: Substitute parts may have equal or higher transition frequencies
Operating Temperature Range: Substitute parts may have equal or extended temperature ranges
Product Status: Active substitute parts are preferred over obsolete designs

All three identified substitute parts (BCX53,115; BCX5316-13R; BSR33,115) meet the mandatory matching parameters and are therefore electrically and mechanically compatible with the BSR33-TP in applications where the specified electrical characteristics are required.

Parameter Comparison

Parameter	BSR33-TP (Main)	BCX53,115	BCX5316-13R	BSR33,115
Manufacturer	Micro Commercial Co	Nexperia USA Inc.	Diodes Incorporated	Nexperia USA Inc.
Transistor Type	PNP	PNP	PNP	PNP
Current - Collector (Ic) Max	1 A	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	80 V	80 V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA	100nA	100nA	100nA
DC Current Gain (hFE) Min	100 @ 100mA, 5V	63 @ 150mA, 2V	40 @ 150mA, 2V	100 @ 100mA, 5V
Power - Max	500 mW	1.3 W	1 W	1.35 W
Frequency - Transition	100 MHz	145 MHz	150 MHz	100 MHz
Operating Temperature Range	-55 to 150°C	150°C (TJ)	-65 to 150°C	150°C (TJ)
Product Status	Not For New Designs	Active	Active	Active
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-243AA (SOT-89)	TO-243AA (SOT-89)	TO-243AA (SOT-89-3)	TO-243AA (SOT-89)
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Qualification	—	AEC-Q100	—	AEC-Q100

Engineering Selection Recommendations

BSR33,115 (Nexperia USA Inc.)

The BSR33,115 is the primary substitute for the BSR33-TP. Both parts share the same base product number (BSR33) and are manufactured by Nexperia USA Inc. This part maintains identical electrical specifications including DC current gain (hFE) of 100 @ 100mA, 5V and transition frequency of 100 MHz. The BSR33,115 carries Active product status, AEC-Q100 automotive qualification, and ROHS3 compliance. The primary difference is packaging format (Tape & Reel versus Bulk) and higher power rating (1.35 W versus 500 mW). This part is suitable for direct replacement in all applications where the BSR33-TP was originally specified.

BCX53,115 (Nexperia USA Inc.)

The BCX53,115 is an active substitute meeting all mandatory electrical and mechanical parameters. This part offers higher power dissipation capability (1.3 W versus 500 mW) and higher transition frequency (145 MHz versus 100 MHz). The BCX53,115 carries AEC-Q100 automotive qualification and ROHS3 compliance. The DC current gain specification differs (63 @ 150mA, 2V versus 100 @ 100mA, 5V), indicating different test conditions but equivalent functional performance within the specified operating envelope. This part is suitable for applications requiring enhanced thermal performance or higher frequency operation.

BCX5316-13R (Diodes Incorporated)

The BCX5316-13R is an active substitute meeting all mandatory electrical and mechanical parameters. This part offers higher power dissipation capability (1 W versus 500 mW) and higher transition frequency (150 MHz versus 100 MHz). The BCX5316-13R carries ROHS3 compliance and supports an extended operating temperature range (-65 to 150°C versus -55 to 150°C). The DC current gain specification differs (40 @ 150mA, 2V versus 100 @ 100mA, 5V), indicating different test conditions but equivalent functional performance within the specified operating envelope. This part is suitable for applications requiring extended low-temperature operation or higher frequency operation.

Frequently Asked Questions (FAQ)

Q: Can the BSR33-TP be directly replaced with any of the listed substitute parts?

A: Yes. All three substitute parts (BCX53,115; BCX5316-13R; BSR33,115) meet the mandatory electrical and mechanical specifications of the BSR33-TP, including collector current rating (1 A), collector-emitter breakdown voltage (80 V), saturation voltage characteristics, and surface mount SOT-89 packaging. Direct substitution is electrically and mechanically valid.

Q: What is the difference between the DC current gain (hFE) specifications across these parts?

A: The hFE specifications are measured at different test conditions. The BSR33-TP and BSR33,115 specify hFE at 100mA collector current and 5V collector-emitter voltage, while BCX53,115 and BCX5316-13R specify hFE at 150mA and 2V. These differences reflect manufacturer test methodologies but do not affect functional compatibility. All parts meet the mandatory saturation voltage specification of 500mV @ 50mA, 500mA, which is the critical parameter for switching applications.

Q: Why do some substitute parts have higher power ratings than the BSR33-TP?

A: The substitute parts (BCX53,115 at 1.3 W, BCX5316-13R at 1 W, BSR33,115 at 1.35 W) have higher maximum power dissipation ratings than the BSR33-TP (500 mW). Higher power ratings indicate improved thermal performance and do not affect compatibility. These parts can be used in applications where the BSR33-TP was originally specified without modification.

Q: Are there temperature range differences between the substitute parts?

A: The BCX5316-13R supports an extended low-temperature range (-65 to 150°C) compared to the BSR33-TP (-55 to 150°C). The BCX53,115 and BSR33,115 specify only the upper temperature limit (150°C). For applications requiring operation below -55°C, the BCX5316-13R is the appropriate selection.

Q: What is the significance of the AEC-Q100 qualification on some substitute parts?

A: AEC-Q100 qualification indicates that the part meets automotive industry reliability and quality standards. The BSR33,115 and BCX53,115 carry this qualification, making them suitable for automotive applications. The BCX5316-13R does not list this qualification but carries ROHS3 compliance. Selection should be based on application requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts (BCX53,115, BCX5316-13R, and BSR33,115) are ROHS3 compliant. The BSR33-TP does not specify RoHS status in the provided data.

Q: What is the difference between SOT-89 and SOT-89-3 packaging?

A: Both are surface mount packages in the TO-243AA family with identical pin configurations and footprints. The BCX5316-13R is specified as SOT-89-3, while other parts are specified as SOT-89. These designations refer to the same physical package and are interchangeable for PCB layout purposes.

Q: Which substitute part should be selected for new designs?

A: The BSR33,115 is the recommended selection for new designs, as it maintains identical electrical specifications to the BSR33-TP (including hFE and transition frequency) while offering Active product status, AEC-Q100 qualification, and higher power rating. This part provides the most direct functional equivalence.

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