BAT54TC Equivalent & Substitute Parts

Part Overview

The BAT54TC is a Schottky diode array with one pair common cathode configuration, rated for 30 V DC reverse voltage and 200 mA average rectified current per diode. Manufactured by Diodes Incorporated in SOT-23-3 surface mount package, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts maintain electrical compatibility while offering improved availability and extended product lifecycle support.

Key Parameters

Parameter	BAT54TC Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 100 mA	—
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	4 µA @ 25 V	—
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction (Max)	125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BAT54TC is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Technology: Schottky diode
Voltage - DC Reverse (Vr) (Max): 30 V minimum
Current - Average Rectified (Io): 200 mA minimum
Reverse Recovery Time (trr): 5 ns
Mounting Type: Surface Mount
Package / Case: TO-236-3, SC-59, SOT-23-3 compatible

Substitution Categories:

Category 1: Parametric Equivalents (Identical Electrical Specifications) Parts that match all key electrical parameters and maintain the same diode configuration. These parts are direct functional replacements with identical performance characteristics.

Category 2: Manufacturer Recommended Substitutes (Enhanced Specifications) Parts that exceed the minimum electrical requirements while maintaining package compatibility. These parts offer improved performance characteristics such as higher reverse voltage ratings or lower reverse leakage current.

Category 3: Direct Manufacturer Alternatives (Cross-Manufacturer Options) Parts from alternative manufacturers that meet or exceed the electrical specifications and package requirements, providing supply chain flexibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If	trr [ns]	Ir @ Vr	Package	Product Status	Tj (Max) [°C]
BAT54TC	Diodes Incorporated	30	200	1 V @ 100 mA	5	4 µA @ 25 V	SOT-23-3	Obsolete	125
BAS40-7-F	Diodes Incorporated	40	200	1 V @ 40 mA	5	200 nA @ 30 V	SOT-23-3	Active	125
BAT54CTA	Diodes Incorporated	30	200	1 V @ 100 mA	5	4 µA @ 25 V	SOT-23-3	Active	125
BAR43-TP	Micro Commercial Co	30	200	800 mV @ 100 mA	5	500 nA @ 25 V	SOT-23	Active	150
BAT54E6327HTSA1	Infineon Technologies	30	200	800 mV @ 100 mA	5	2 µA @ 25 V	SOT-23-3	Active	150
BAT54,215	Nexperia USA Inc.	30	200	800 mV @ 100 mA	5	2 µA @ 25 V	SOT-23-3	Active	150
BAT54,235	Nexperia USA Inc.	30	200	800 mV @ 100 mA	5	2 µA @ 25 V	SOT-23-3	Active	150
BAT54-E3-18	Vishay General Semiconductor - Diodes Division	30	200	800 mV @ 100 mA	5	2 µA @ 25 V	SOT-23-3	Active	125
BAT54-G3-08	Vishay General Semiconductor - Diodes Division	30	200	800 mV @ 100 mA	5	2 µA @ 25 V	SOT-23-3	Active	125
BAT54-HE3-18	Vishay General Semiconductor - Diodes Division	30	200	800 mV @ 100 mA	5	2 µA @ 25 V	SOT-23-3	Last Time Buy	125
BAT54-TP	Micro Commercial Co	30	200	1 V @ 100 mA	5	2 µA @ 25 V	SOT-23	Active	125

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalent):

BAT54CTA from Diodes Incorporated is the primary parametric equivalent. This part maintains identical electrical specifications to the BAT54TC, including 30 V reverse voltage, 200 mA current rating, and 1 V forward voltage at 100 mA. The part is in active production status with Tape & Reel packaging, ensuring long-term availability and supply chain stability.

For Enhanced Performance with Active Status:

BAT54-E3-18, BAT54-G3-08, and BAT54-TP provide active product alternatives with improved reverse leakage characteristics (2 µA @ 25 V versus 4 µA @ 25 V). These parts maintain the 30 V / 200 mA electrical specifications and SOT-23-3 package compatibility. BAT54-E3-18 and BAT54-G3-08 are available in standard packaging formats (Tape & Reel, Cut Tape & Digi-Reel).

For Higher Voltage Applications:

BAS40-7-F from Diodes Incorporated offers 40 V reverse voltage rating while maintaining 200 mA current capacity and 5 ns reverse recovery time. This part is suitable for applications requiring voltage margin above the 30 V specification.

For Cross-Manufacturer Supply Diversification:

BAT54E6327HTSA1 from Infineon Technologies and BAT54,215 / BAT54,235 from Nexperia USA Inc. provide equivalent electrical performance with active product status. These parts support supply chain redundancy and long-term availability assurance.

For Automotive Applications:

BAT54-HE3-18 from Vishay General Semiconductor carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. This part is currently in Last Time Buy status; transition planning to alternative qualified parts is recommended for new designs.

All recommended substitutes maintain RoHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and REACH unaffected status, ensuring regulatory compliance across manufacturing and deployment environments.

Frequently Asked Questions (FAQ)

Q: Can BAT54CTA be used as a direct replacement for BAT54TC?

A: Yes. BAT54CTA is a parametric equivalent with identical electrical specifications: 30 V reverse voltage, 200 mA current rating, 1 V forward voltage at 100 mA, and 5 ns reverse recovery time. Both parts use SOT-23-3 package. The primary difference is product status: BAT54CTA is in active production while BAT54TC is obsolete.

Q: What is the difference between BAT54-E3-18 and BAT54-G3-08?

A: Both parts are electrically identical with 30 V reverse voltage, 200 mA current rating, and SOT-23-3 package. The difference is packaging format: BAT54-E3-18 is supplied in Tape & Reel format, while BAT54-G3-08 is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly process requirements.

Q: Why does BAS40-7-F have a higher reverse voltage rating?

A: BAS40-7-F is rated for 40 V reverse voltage compared to the BAT54TC specification of 30 V. This higher rating provides additional voltage margin for applications with transient overvoltage conditions. The 200 mA current rating and 5 ns reverse recovery time remain identical to the BAT54TC.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance status, ensuring compatibility with environmental and regulatory requirements for manufacturing and deployment.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and does not require special moisture control during storage or handling. This simplifies inventory management and reduces risk of moisture-related failures during assembly.

Q: Can BAT54-HE3-18 be used in non-automotive applications?

A: Yes. BAT54-HE3-18 meets all electrical specifications for general-purpose applications. The AEC-Q101 automotive qualification indicates additional quality and reliability testing, making it suitable for both automotive and non-automotive applications. However, this part is in Last Time Buy status; for new designs, BAT54-E3-18 or BAT54-G3-08 are recommended for long-term availability.

Q: What is the difference between TO-236-3 and SOT-23-3 package designations?

A: TO-236-3 and SOT-23-3 refer to the same physical package. TO-236-3 is the older JEDEC designation, while SOT-23-3 is the modern surface mount package designation. SC-59 is an alternative designation for the same package. All substitute parts use this identical package footprint.

Q: How does reverse leakage current affect circuit performance?

A: Reverse leakage current (Ir) represents the small current flowing through the diode in reverse bias condition. Lower reverse leakage reduces power dissipation and improves circuit efficiency. BAT54TC specifies 4 µA @ 25 V, while most active substitutes specify 2 µA @ 25 V, representing a 50% improvement in leakage performance.

Q: Is BAT54-TP suitable for high-temperature applications?

A: BAT54-TP is rated for junction temperature up to 125°C maximum, identical to BAT54TC. For applications requiring higher temperature operation, BAR43-TP and BAT54E6327HTSA1 are rated to 150°C maximum junction temperature.

Q: What packaging options are available for BAT54CTA?

A: BAT54CTA is supplied in Tape & Reel (TR) packaging format. For alternative packaging formats, BAT54-E3-18 (Tape & Reel) and BAT54-G3-08 (Cut Tape & Digi-Reel) provide equivalent electrical performance with different packaging options.

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