BAR43C Equivalent & Substitute Parts

Part Overview

The BAR43C is a Schottky diode array manufactured by onsemi, configured as a 1 Pair Common Cathode diode array rated for 30 V DC reverse voltage and 200 mA average rectified current per diode. The device is packaged in a surface mount TO-236-3 (SOT-23-3) package and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain electrical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	BAR43C Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io) (per Diode)	200 mA
Voltage - Forward (Vf) (Max) @ If	800 mV @ 100 mA
Reverse Recovery Time (trr)	5 ns
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the BAR43C is determined by strict electrical and mechanical compatibility across the following parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Common Cathode (mandatory)
Technology: Schottky (mandatory)
Voltage - DC Reverse (Vr) (Max): 30 V minimum (equal or higher acceptable)
Current - Average Rectified (Io) (per Diode): 200 mA minimum (equal or higher acceptable)
Voltage - Forward (Vf) (Max) @ If: 800 mV @ 100 mA maximum (equal or lower acceptable)
Reverse Recovery Time (trr): 5 ns (equal or lower acceptable)
Mounting Type: Surface Mount (mandatory)
Package / Case: TO-236-3, SC-59, SOT-23-3 (mandatory for direct substitution)

Substitute parts are grouped into two categories:

Category 1: Direct Package Substitutes (TO-236-3, SOT-23-3) Parts that maintain identical package form factor and all electrical parameters within acceptable ranges. These parts are pin-compatible and require no PCB layout modifications.

Category 2: Enhanced Performance Substitutes Parts that exceed BAR43C electrical specifications while maintaining the same package. These parts provide improved performance margins and are suitable for applications requiring higher voltage or current ratings.

Category 3: Alternative Package Substitutes (SOT-323) Parts that maintain electrical compatibility but use a different surface mount package (SOT-323). These require PCB layout modifications but offer equivalent electrical performance.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Package	Product Status
BAR43C	onsemi	30 V	200 mA	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Obsolete
BAT54CLT1G	onsemi	30 V	200 mA (DC)	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAT54CLT3G	onsemi	30 V	200 mA (DC)	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAR43C-TP	Micro Commercial Co	30 V	200 mA	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAR43CFILM	STMicroelectronics	30 V	100 mA	1 V @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAT5405E6327HTSA1	Infineon Technologies	30 V	200 mA (DC)	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAT5405WH6327XTSA1	Infineon Technologies	30 V	200 mA (DC)	800 mV @ 100 mA	5 ns	SC-70, SOT-323	Active
BAT54C,215	Nexperia USA Inc.	30 V	200 mA (DC)	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAT54C-7-F	Diodes Incorporated	30 V	200 mA (DC)	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAT54C-E3-08	Vishay General Semiconductor - Diodes Division	30 V	200 mA (DC)	800 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active
BAT54CFILM	STMicroelectronics	40 V	300 mA (DC)	900 mV @ 100 mA	5 ns	TO-236-3, SOT-23-3	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Package Specifications):

The following parts are direct substitutes for the BAR43C and require no design modifications:

BAT54CLT1G (onsemi): Active product status with ROHS3 compliance. Identical electrical specifications and package. Extended operating temperature range (-55°C to 125°C).
BAT54CLT3G (onsemi): Active product status with ROHS3 compliance. Identical electrical specifications and package. Extended operating temperature range (-55°C to 125°C).
BAT54C,215 (Nexperia USA Inc.): Active product status with ROHS3 compliance and AEC-Q101 automotive qualification. Identical electrical specifications and package. Suitable for automotive applications.
BAT54C-7-F (Diodes Incorporated): Active product status with ROHS3 compliance. Identical electrical specifications and package. Extended operating temperature range (-65°C to 150°C).
BAT54C-E3-08 (Vishay General Semiconductor - Diodes Division): Active product status with ROHS3 compliance. Identical electrical specifications and package.
BAT5405E6327HTSA1 (Infineon Technologies): Active product status with ROHS3 compliance. Identical electrical specifications and package.
BAR43C-TP (Micro Commercial Co): Active product status. Identical electrical specifications and package. Bulk packaging option.

Enhanced Performance Substitute (Higher Voltage and Current Rating):

BAT54CFILM (STMicroelectronics): Active product status with ROHS3 compliance. Exceeds BAR43C specifications with 40 V reverse voltage rating and 300 mA current rating. Forward voltage is 900 mV @ 100 mA. Suitable for applications requiring higher performance margins. Same package form factor.

Alternative Package Substitute (SOT-323):

BAT5405WH6327XTSA1 (Infineon Technologies): Active product status with ROHS3 compliance. Identical electrical specifications to BAR43C but packaged in SC-70 (SOT-323). Requires PCB layout modification due to different package footprint.

Limited Current Rating Substitute:

BAR43CFILM (STMicroelectronics): Active product status with ROHS3 compliance. Rated for 100 mA per diode (50% of BAR43C rating). Forward voltage is 1 V @ 100 mA. Suitable only for applications with reduced current requirements.

Frequently Asked Questions (FAQ)

Q: Can BAT54CLT1G be used as a direct replacement for BAR43C?

A: Yes. BAT54CLT1G is a direct substitute. Both parts share identical diode configuration (1 Pair Common Cathode), technology (Schottky), voltage rating (30 V), current rating (200 mA), forward voltage (800 mV @ 100 mA), and package (TO-236-3, SOT-23-3). BAT54CLT1G is active and ROHS3 compliant.

Q: What is the difference between BAT54CLT1G and BAT54CLT3G?

A: Both parts are electrically and mechanically identical. The difference is in packaging format: BAT54CLT1G is supplied in Cut Tape (CT) & Digi-Reel format, while BAT54CLT3G is also supplied in Cut Tape (CT) & Digi-Reel format. Both are active products from onsemi with identical specifications.

Q: Can BAT54CFILM replace BAR43C?

A: BAT54CFILM is not a direct replacement. While it maintains the same package (TO-236-3, SOT-23-3) and diode configuration, it has higher voltage (40 V) and current (300 mA) ratings, and higher forward voltage (900 mV @ 100 mA). It is suitable only for applications where the BAR43C's specifications are insufficient and higher performance margins are required.

Q: Can BAR43CFILM replace BAR43C?

A: BAR43CFILM is not a direct replacement. It is rated for only 100 mA per diode, which is 50% of the BAR43C's 200 mA rating. It is suitable only for applications with reduced current requirements. Forward voltage is also higher at 1 V @ 100 mA.

Q: What is the difference between BAT5405E6327HTSA1 and BAT5405WH6327XTSA1?

A: Both parts are from Infineon Technologies with identical electrical specifications (30 V, 200 mA, 800 mV @ 100 mA). The primary difference is the package: BAT5405E6327HTSA1 uses TO-236-3 (SOT-23-3), while BAT5405WH6327XTSA1 uses SC-70 (SOT-323). The SOT-323 package is smaller and requires different PCB layout.

Q: Is BAT54C,215 suitable for automotive applications?

A: Yes. BAT54C,215 from Nexperia USA Inc. carries AEC-Q101 automotive qualification and is ROHS3 compliant. It is suitable for automotive applications requiring a Schottky diode array with 30 V, 200 mA specifications in SOT-23-3 package.

Q: What is the operating temperature range of BAT54C-7-F?

A: BAT54C-7-F from Diodes Incorporated has an operating temperature range of -65°C to 150°C, which is wider than the BAR43C's maximum junction temperature of 150°C.

Q: Can I use BAR43C-TP as a substitute?

A: Yes. BAR43C-TP from Micro Commercial Co is an active product with identical electrical specifications and package to BAR43C. It is supplied in bulk packaging format.

Q: Are all substitute parts ROHS3 compliant?

A: Most active substitute parts are ROHS3 compliant. BAR43C-TP does not list RoHS status in the provided specifications. Verify RoHS compliance requirements for your specific application before selection.

Q: What is the moisture sensitivity level (MSL) for these diodes?

A: All listed parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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