BA033FP-E2 Equivalent & Substitute Parts

Part Overview

The BA033FP-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, delivering a fixed 3.3V output at 1A in a TO-252-3 (DPAK) surface mount package. This device is classified as "Not For New Designs," indicating it has reached end-of-life status. The part provides positive fixed output regulation with integrated over-current, over-temperature, and over-voltage protection, operating across the industrial temperature range of -40°C to 85°C.

Due to its obsolete status, identifying functionally equivalent and compatible substitute parts is essential for ongoing production support, maintenance applications, and design continuity. Substitute selection must maintain compatibility across output voltage, current capacity, package type, and protection features while considering product lifecycle status and availability.

Key Parameters

Parameter	BA033FP-E2 Value
Manufacturer	Rohm Semiconductor
Output Voltage (Fixed)	3.3V
Output Current	1A
Input Voltage (Max)	25V
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature, Over Voltage
RoHS Status	ROHS3 Compliant
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitute parts for the BA033FP-E2 are selected based on the following critical parameters:

Primary Substitution Criteria:

Output voltage: 3.3V fixed (exact match required)
Package type: TO-252-3 DPAK surface mount (mechanical and thermal compatibility)
Output current capacity: Equal to or greater than 1A
Input voltage rating: Minimum 25V or higher
Protection features: Over-current and over-temperature protection (minimum requirement)
RoHS compliance: ROHS3 Compliant

Substitution Logic: Parts are grouped into two categories based on output current capacity and product lifecycle status. Category A includes parts with output current ≥1A, suitable for direct replacement in applications requiring full 1A capability. Category B includes parts with lower output current (100mA–500mA), suitable only for applications with reduced current requirements. Product status (Active vs. Obsolete) is noted for supply chain planning but does not disqualify functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Package	Operating Temp Range	Product Status
BA033FP-E2	Rohm Semiconductor	3.3V	1A	25V	—	TO-252-3 DPAK	-40°C ~ 85°C	Not For New Designs
LD29150DT33R	STMicroelectronics	3.3V	1.5A	14V	0.7V @ 1.5A	TO-252-3 DPAK	-40°C ~ 125°C	Active
NCV1117DT33T5G	onsemi	3.3V	1A	20V	1.2V @ 800mA	TO-252-3 DPAK	-40°C ~ 125°C	Active
TL760M33QKVURQ1	Texas Instruments	3.3V	500mA	26V	0.5V @ 500mA	TO-252-3 DPAK	-40°C ~ 125°C	Last Time Buy
LF33CDT-TR	STMicroelectronics	3.3V	500mA	16V	0.7V @ 500mA	TO-252-3 DPAK	-40°C ~ 125°C	Active
LP2950CDTX-3.3/NOPB	Texas Instruments	3.3V	100mA	30V	0.6V @ 100mA	TO-252-3 DPAK	-40°C ~ 125°C	Active
LP2950CDT-3.3G	onsemi	3.3V	100mA	30V	0.45V @ 100mA	TO-252-3 DPAK	-40°C ~ 125°C	Active
LP2950CDT-3.3RKG	onsemi	3.3V	100mA	30V	0.45V @ 100mA	TO-252-3 DPAK	-40°C ~ 125°C	Active
LP2950ACDT-3.3RG	onsemi	3.3V	100mA	30V	0.45V @ 100mA	TO-252-3 DPAK	-40°C ~ 125°C	Active
LP2950CDT-3.3/NOPB	Texas Instruments	3.3V	100mA	30V	0.6V @ 100mA	TO-252-3 DPAK	-40°C ~ 125°C	Active
LF33CDT-TRY	STMicroelectronics	3.3V	500mA	16V	1.3V @ 500mA	TO-252-3 DPAK	-40°C ~ 125°C	Obsolete

Engineering Selection Recommendations

Category A: Full Current Replacement (≥1A Output)

LD29150DT33R (STMicroelectronics) and NCV1117DT33T5G (onsemi) are the primary direct replacements for the BA033FP-E2. Both deliver 1A or greater output current in the identical TO-252-3 DPAK package with active product status. LD29150DT33R provides 1.5A output capacity with a maximum input voltage of 14V, suitable for applications with lower input voltage headroom. NCV1117DT33T5G delivers 1A output with a maximum input voltage of 20V and includes AEC-Q100 automotive qualification, appropriate for automotive and industrial applications requiring extended temperature operation to 125°C.

Category B: Reduced Current Replacement (500mA–100mA Output)

TL760M33QKVURQ1 (Texas Instruments) and LF33CDT-TR (STMicroelectronics) provide 500mA output capacity. TL760M33QKVURQ1 carries Last Time Buy status with a maximum input voltage of 26V and includes AEC-Q100 automotive qualification. LF33CDT-TR is active with a maximum input voltage of 16V. Both are suitable for applications with current requirements not exceeding 500mA.

LP2950 series variants (LP2950CDTX-3.3/NOPB, LP2950CDT-3.3G, LP2950CDT-3.3RKG, LP2950ACDT-3.3RG, LP2950CDT-3.3/NOPB) from Texas Instruments and onsemi provide 100mA output capacity with maximum input voltages of 30V. These are suitable only for low-current applications and are not appropriate for direct replacement in designs requiring 1A output.

Compliance and Lifecycle Considerations

All substitute parts listed are ROHS3 compliant and REACH unaffected. Parts with Active status (LD29150DT33R, NCV1117DT33T5G, LF33CDT-TR, LP2950 series) are recommended for new production and long-term supply chain stability. TL760M33QKVURQ1 (Last Time Buy) and LF33CDT-TRY (Obsolete) should be evaluated for existing inventory and legacy support only.

Frequently Asked Questions (FAQ)

Q: Can LD29150DT33R directly replace BA033FP-E2 in all applications?

A: LD29150DT33R is mechanically and electrically compatible in the TO-252-3 DPAK package with identical 3.3V output. However, its maximum input voltage is 14V compared to BA033FP-E2's 25V. Verify that your input voltage does not exceed 14V. LD29150DT33R provides higher output current (1.5A vs. 1A), making it suitable for equal or lower current applications.

Q: What is the difference between NCV1117DT33T5G and LD29150DT33R?

A: Both deliver 1A output in TO-252-3 DPAK. NCV1117DT33T5G has a maximum input voltage of 20V and includes AEC-Q100 automotive qualification. LD29150DT33R has a maximum input voltage of 14V and higher output current (1.5A). Select based on your input voltage requirements and automotive qualification needs.

Q: Can I use LP2950 series parts as a replacement?

A: LP2950 series parts (100mA output) are not suitable for direct replacement in applications requiring 1A output. They are appropriate only for low-current designs with maximum current requirements of 100mA. Verify your application's actual current draw before selecting this option.

Q: Why do some substitute parts have higher operating temperature ranges (-40°C ~ 125°C vs. -40°C ~ 85°C)?

A: Extended temperature range indicates the part is qualified for broader environmental conditions. If your application operates within -40°C ~ 85°C, parts with -40°C ~ 125°C ratings are fully compatible and provide additional margin. This does not affect substitution suitability.

Q: What does "Last Time Buy" status mean for TL760M33QKVURQ1?

A: Last Time Buy indicates the manufacturer has announced end-of-production. Existing inventory may be available, but future supply is not guaranteed. For new designs or long-term production, select parts with Active status such as LD29150DT33R or NCV1117DT33T5G.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of BA033FP-E2.

Q: Does package type affect thermal performance?

A: All substitute parts use the identical TO-252-3 DPAK (SC-63) package with 2 leads plus tab. Thermal performance is determined by die design and junction-to-case characteristics, which vary by manufacturer. Consult individual datasheets for thermal resistance (θJC) specifications if thermal management is critical to your application.

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