BAT54CWT1 Equivalent & Substitute Parts

Part Overview

The BAT54CWT1 is a Schottky diode array featuring one pair of common cathode configuration rated for 30 V DC reverse voltage and 200 mA average rectified current per diode. The device is packaged in SC-70, SOT-323 surface mount form factor and operates across a junction temperature range of -55°C to 125°C.

The BAT54CWT1 is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode array configuration.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io) (per Diode)	200	mA (DC)
Voltage - Forward (Vf) (Max) @ If	800	mV @ 100 mA
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	2	µA @ 25 V
Operating Temperature - Junction	-55 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	SC-70, SOT-323	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BAT54CWT1 are classified into three categories based on electrical and mechanical parameter alignment:

Direct Manufacturer Equivalents maintain identical electrical specifications and package form factor. These parts satisfy all critical parameters: 30 V reverse voltage rating, 200 mA average rectified current, 800 mV forward voltage at 100 mA, 5 ns reverse recovery time, and SC-70 SOT-323 surface mount packaging. Direct equivalents differ primarily in product status (active versus obsolete) and RoHS compliance status.

Parametric Equivalents provide identical electrical performance and package compatibility but may originate from different manufacturers or include additional qualifications such as automotive grade certification (AEC-Q101). These parts maintain the same voltage, current, and thermal specifications while offering enhanced supply availability and compliance certifications.

Similar Parts share the same diode configuration, technology, and package form factor but exhibit variations in one or more electrical parameters. These variations include higher voltage ratings (40 V), increased current capacity (300 mA), different forward voltage characteristics (1 V @ 100 mA), or alternative package options (SOT-23-3). Similar parts are suitable for applications where the specified parameter variation does not compromise circuit performance.

The following key parameters determine substitution eligibility:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 30 V minimum
Current - Average Rectified (Io) (per Diode): 200 mA minimum
Package / Case: SC-70, SOT-323 (or compatible surface mount package)
Mounting Type: Surface Mount

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	Tj (Max) [°C]	Package	RoHS Status	Qualification
BAT54CWT1	onsemi	Obsolete	30	200	800 @ 100	5	2 @ 25	125	SC-70, SOT-323	Non-compliant	—
BAT54CWT1G	onsemi	Active	30	200	800 @ 100	5	2 @ 25	125	SC-70, SOT-323	ROHS3 Compliant	—
SBAT54CWT1G	onsemi	Active	30	200	800 @ 100	5	2 @ 25	125	SC-70, SOT-323	ROHS3 Compliant	AEC-Q101
SBAT54CWT3G	onsemi	Active	30	200	800 @ 100	5	2 @ 25	125	SC-70, SOT-323	ROHS3 Compliant	AEC-Q101
1PS70SB15,115	Nexperia USA Inc.	Active	30	200	800 @ 100	—	2 @ 25	150	SC-70, SOT-323	ROHS3 Compliant	AEC-Q100
BAT54CW-7-F	Diodes Incorporated	Active	30	200	1000 @ 100	5	2 @ 25	125	SC-70, SOT-323	ROHS3 Compliant	—
BAT5405E6327HTSA1	Infineon Technologies	Active	30	200	800 @ 100	5	2 @ 25	150	TO-236-3, SC-59, SOT-23-3	ROHS3 Compliant	—
BAT54CWFILM	STMicroelectronics	Active	40	300	900 @ 100	5	1 @ 30	150	SC-70, SOT-323	ROHS3 Compliant	—
BAT54CWQ-7-F	Diodes Incorporated	Active	30	200	1000 @ 100	5	2 @ 25	125	SC-70, SOT-323	ROHS3 Compliant	AEC-Q101
BAT54CWT-TP	Micro Commercial Co	Active	30	200	1000 @ 100	5	2 @ 25	125	SC-70, SOT-323	ROHS3 Compliant	—
BAT5405WH6327XTSA1	Infineon Technologies	Active	30	200	800 @ 100	5	2 @ 25	150	SC-70, SOT-323	ROHS3 Compliant	—

Engineering Selection Recommendations

For Direct Replacement with Active Product Status:

BAT54CWT1G (onsemi) provides the most direct substitution path. This part maintains identical electrical specifications and SC-70 SOT-323 packaging while transitioning from obsolete to active product status. RoHS3 compliance is achieved without parameter compromise. This part is suitable for new designs and ongoing production where RoHS compliance is required.

For Automotive Applications:

SBAT54CWT1G and SBAT54CWT3G (onsemi) are recommended for automotive-grade applications. Both parts carry AEC-Q101 qualification, maintain identical electrical specifications to the BAT54CWT1, and provide active product status with RoHS3 compliance. These parts are appropriate for designs requiring automotive qualification standards.

SBAT54CWT1G and SBAT54CWT3G differ only in packaging configuration (SBAT54CWT1G supplied in Tape & Reel format; SBAT54CWT3G supplied in alternative packaging). Selection between these variants depends on procurement and assembly requirements.

For Alternative Manufacturer Sources:

1PS70SB15,115 (Nexperia USA Inc.) provides parametric equivalence with identical voltage and current ratings. This part carries AEC-Q100 automotive qualification and extends maximum junction temperature to 150°C. RoHS3 compliance is provided. This part is suitable for applications requiring multi-source qualification.

BAT5405WH6327XTSA1 (Infineon Technologies) maintains identical electrical specifications with extended maximum junction temperature (150°C). This part is supplied in Tape & Reel packaging and provides RoHS3 compliance. Suitable for high-temperature applications within the specified parameter envelope.

For Applications Tolerating Forward Voltage Variation:

BAT54CW-7-F, BAT54CWQ-7-F, and BAT54CWT-TP maintain 30 V reverse voltage and 200 mA current ratings but exhibit forward voltage of 1 V at 100 mA (compared to 800 mV specification of the BAT54CWT1). These parts are suitable for applications where the additional forward voltage drop does not compromise circuit performance. BAT54CWQ-7-F includes AEC-Q101 automotive qualification.

For Applications Requiring Enhanced Ratings:

BAT54CWFILM (STMicroelectronics) provides enhanced electrical specifications: 40 V reverse voltage rating and 300 mA average rectified current per diode. This part is suitable for applications requiring higher voltage or current margins. Extended maximum junction temperature (150°C) is provided. Forward voltage is specified at 900 mV @ 100 mA. This part is not a direct replacement but serves applications where enhanced ratings provide design benefits.

For Package Compatibility Considerations:

BAT5405E6327HTSA1 (Infineon Technologies) utilizes TO-236-3, SC-59, SOT-23-3 packaging instead of SC-70 SOT-323. This part maintains identical electrical specifications but requires PCB layout modification. This part is suitable only for designs where package footprint change is acceptable.

Frequently Asked Questions (FAQ)

Q: Can BAT54CWT1G be used as a direct replacement for BAT54CWT1?

A: Yes. BAT54CWT1G maintains identical electrical specifications: 30 V reverse voltage, 200 mA average rectified current, 800 mV forward voltage at 100 mA, 5 ns reverse recovery time, and SC-70 SOT-323 packaging. The primary differences are product status (active versus obsolete) and RoHS3 compliance. No circuit modification is required.

Q: What is the difference between BAT54CWT1G and SBAT54CWT1G?

A: Both parts maintain identical electrical specifications and SC-70 SOT-323 packaging. SBAT54CWT1G includes AEC-Q101 automotive qualification and is designated for automotive applications. BAT54CWT1G is suitable for general industrial and commercial applications. Selection depends on application requirements and qualification standards.

Q: Can BAT54CW-7-F be substituted for BAT54CWT1?

A: Electrical substitution is possible with parameter consideration. BAT54CW-7-F maintains 30 V reverse voltage, 200 mA average rectified current, and SC-70 SOT-323 packaging. Forward voltage is specified at 1 V @ 100 mA compared to 800 mV for the BAT54CWT1. The additional 200 mV forward voltage drop must be evaluated against circuit performance requirements. This part is suitable only if the increased forward voltage does not compromise circuit operation.

Q: Is BAT54CWFILM a suitable replacement for BAT54CWT1?

A: BAT54CWFILM is not a direct replacement. While both parts share SC-70 SOT-323 packaging and Schottky technology, BAT54CWFILM provides enhanced electrical specifications: 40 V reverse voltage (versus 30 V) and 300 mA average rectified current (versus 200 mA). Forward voltage is 900 mV @ 100 mA. This part is suitable for applications requiring higher voltage or current ratings but is not interchangeable with BAT54CWT1 in existing designs without circuit analysis.

Q: What packaging options are available for BAT54CWT1 substitutes?

A: Most substitute parts maintain SC-70 SOT-323 surface mount packaging, ensuring PCB compatibility. BAT5405E6327HTSA1 utilizes TO-236-3, SC-59, SOT-23-3 packaging, which requires PCB layout modification. Packaging selection depends on existing PCB design and assembly capabilities.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts carry RoHS3 compliance status. The original BAT54CWT1 is RoHS non-compliant. Transition to RoHS3-compliant alternatives is necessary for designs subject to RoHS regulatory requirements.

Q: Which substitute part is recommended for new automotive designs?

A: SBAT54CWT1G or SBAT54CWT3G (onsemi) are recommended for new automotive designs. Both parts carry AEC-Q101 qualification, maintain identical electrical specifications to BAT54CWT1, and provide active product status with RoHS3 compliance. Alternative automotive-qualified option is 1PS70SB15,115 (Nexperia USA Inc.) with AEC-Q100 qualification.

Q: What is the maximum junction temperature difference among substitute parts?

A: The BAT54CWT1 and most onsemi/Diodes Incorporated substitutes specify maximum junction temperature of 125°C. Nexperia 1PS70SB15,115, Infineon BAT5405E6327HTSA1, and STMicroelectronics BAT54CWFILM extend maximum junction temperature to 150°C. This difference is significant for high-temperature applications and should be considered during part selection.

Q: Can substitute parts be mixed in the same production batch?

A: Electrical interchangeability exists among parts with identical specifications (BAT54CWT1G, SBAT54CWT1G, SBAT54CWT3G, 1PS70SB15,115, and BAT5405WH6327XTSA1). Parts with parameter variations (BAT54CW-7-F, BAT54CWQ-7-F, BAT54CWT-TP, BAT54CWFILM, BAT5405E6327HTSA1) require circuit-level evaluation before mixing. Production batch consistency is recommended to simplify quality control and traceability.

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