BAT54LT3G Equivalent & Substitute Parts

Part Overview

The BAT54LT3G is a Schottky diode manufactured by onsemi, rated for 30V reverse voltage and 200mA average rectified current in a surface mount SOT-23-3 package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The BAT54LT3G serves applications requiring small-signal rectification, switching, and protection circuits where low forward voltage drop and fast switching characteristics are required.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	200 mA
Voltage - Forward (Vf) (Max) @ If	800 mV @ 100 mA
Reverse Recovery Time (trr)	5 ns
Current - Reverse Leakage @ Vr	2 µA @ 25 V
Capacitance @ Vr, F	10 pF @ 1V, 1MHz
Package / Case	TO-236-3, SC-59, SOT-23-3
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the BAT54LT3G is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

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

Secondary Matching Parameters:

Voltage - Forward (Vf) (Max) @ If: 800 mV @ 100 mA
Reverse Recovery Time (trr): 5 ns
Current - Reverse Leakage @ Vr: 2 µA @ 25 V
Capacitance @ Vr, F: 10 pF @ 1V, 1MHz
Operating Temperature - Junction: -55°C ~ 125°C

Substitute parts are grouped into two categories: parametric equivalents (matching all critical and secondary parameters) and similar parts (matching critical parameters with minor variations in secondary specifications or packaging options).

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Package	Temp Range
BAT54LT3G	onsemi	Obsolete	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	SOT-23-3	-55°C ~ 125°C
NSVBAT54LT1G	onsemi	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	SOT-23-3	-55°C ~ 125°C
BAT54-E3-08	Vishay General Semiconductor - Diodes Division	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	SOT-23-3	-55°C ~ 125°C
BAT54-E3-18	Vishay General Semiconductor - Diodes Division	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	SOT-23-3	-55°C ~ 125°C
BAT54-G3-08	Vishay General Semiconductor - Diodes Division	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	SOT-23-3	-55°C ~ 125°C
BAT54_R1_00001	Panjit International Inc.	Active	30 V	200 mA	600 mV @ 100 mA	Not specified	2 µA @ 25 V	SOT-23-3	-55°C ~ 125°C
BAT54HE3-TP	Micro Commercial Co	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	SOT-23-3	-55°C ~ 125°C

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes):

NSVBAT54LT1G (onsemi) and BAT54HE3-TP (Micro Commercial Co) are parametric equivalents to the BAT54LT3G. Both parts match all critical electrical parameters and operating temperature range. NSVBAT54LT1G is an active product from the original manufacturer onsemi, providing continuity in design support. BAT54HE3-TP carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability.

Similar Substitutes (Cross-Compatible):

BAT54-E3-08, BAT54-E3-18, and BAT54-G3-08 (Vishay General Semiconductor - Diodes Division) are similar substitutes matching all critical electrical parameters. These parts are active products with established supply chains. The primary difference is packaging format: BAT54-E3-08 and BAT54-G3-08 are supplied in Cut Tape (CT) & Digi-Reel format, while BAT54-E3-18 is supplied in Tape & Reel (TR) format.

Alternative with Parameter Variation:

BAT54_R1_00001 (Panjit International Inc.) matches critical electrical parameters but specifies a lower forward voltage of 600 mV @ 100 mA compared to the 800 mV specification of the BAT54LT3G. This part is suitable for applications where lower forward voltage drop is beneficial or acceptable.

All substitute parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the original BAT54LT3G.

Frequently Asked Questions (FAQ)

Q: Can NSVBAT54LT1G directly replace BAT54LT3G in existing designs?

A: Yes. NSVBAT54LT1G is a parametric equivalent with identical electrical specifications, operating temperature range, and package configuration. The primary difference is product status: NSVBAT54LT1G is active while BAT54LT3G is obsolete.

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

A: Both parts are electrically identical. The difference is packaging format: BAT54-E3-08 is supplied in Cut Tape (CT) & Digi-Reel format, while BAT54-E3-18 is supplied in Tape & Reel (TR) format. Selection depends on assembly equipment and procurement requirements.

Q: Is BAT54_R1_00001 suitable as a substitute despite lower forward voltage?

A: BAT54_R1_00001 matches all critical electrical parameters and package requirements. The lower forward voltage specification (600 mV @ 100 mA versus 800 mV) represents improved performance in rectification efficiency. Compatibility depends on circuit design margins and whether the lower forward voltage is acceptable for the application.

Q: Does BAT54HE3-TP offer advantages over other substitutes?

A: BAT54HE3-TP carries AEC-Q101 automotive qualification, making it suitable for automotive and high-reliability applications. Electrically, it is a parametric equivalent to BAT54LT3G. Selection should be based on application requirements and qualification standards.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the compliance status of the original BAT54LT3G.

Q: What packaging options are available for substitutes?

A: All substitute parts use the SOT-23-3 (TO-236-3, SC-59) surface mount package, maintaining mechanical compatibility. Packaging format varies: some are supplied in Cut Tape (CT) & Digi-Reel, others in Tape & Reel (TR). Selection depends on assembly process requirements.

Q: Can I use BAT54-G3-08 in place of BAT54-E3-08?

A: Yes. Both parts are electrically identical and use the same SOT-23-3 package. Both are supplied in Cut Tape (CT) & Digi-Reel format. Selection between them depends on supplier availability and procurement lead times.

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