BAT54SLT1 Equivalent & Substitute Parts

Part Overview

The BAT54SLT1 is a Schottky diode array in a 1 Pair Series Connection configuration, rated for 30 V DC reverse voltage and 200 mA average rectified current per diode. Manufactured by onsemi, this component is packaged in a surface mount TO-236-3 (SOT-23-3) form factor. The BAT54SLT1 is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional compatibility within defined parameter tolerances.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Series Connection	—
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 (Max)	125	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BAT54SLT1 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

Diode Configuration: 1 Pair Series Connection
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io) (per Diode): 200 mA (DC)
Reverse Recovery Time (trr): 5 ns
Current - Reverse Leakage @ Vr: 2 µA @ 25 V

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package / Case: TO-236-3, SC-59, SOT-23-3

Allowable Variations:

Voltage - Forward (Vf) (Max) @ If: Range 600 mV to 1 V @ 100 mA
Operating Temperature - Junction (Max): 125°C or higher
RoHS Status: Active parts are RoHS3 Compliant (improvement over obsolete part)
Product Status: Active parts are preferred over obsolete status

All identified substitute parts maintain the core electrical and mechanical specifications required for direct functional replacement in applications designed for the BAT54SLT1.

Parameter Comparison

Parameter	BAT54SLT1 (Main)	BAT54SLT1G	BAT5404E6327HTSA1	BAT54S-E3-08	BAT54S-G3-08	BAT54S-TP	BAT54S_R1_00001
Manufacturer	onsemi	onsemi	Infineon Technologies	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Micro Commercial Co	Panjit International Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Diode Configuration	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V	30 V	30 V	30 V	30 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)	200 mA (DC)	200 mA (DC)	200 mA (DC)	Not specified	200 mA (DC)	200 mA
Voltage - Forward (Vf) (Max) @ If	800 mV @ 100 mA	800 mV @ 100 mA	800 mV @ 100 mA	800 mV @ 100 mA	800 mV @ 100 mA	1 V @ 100 mA	600 mV @ 100 mA
Reverse Recovery Time (trr)	5 ns	5 ns	5 ns	5 ns	5 ns	5 ns	Not specified
Current - Reverse Leakage @ Vr	2 µA @ 25 V	2 µA @ 25 V	2 µA @ 25 V	2 µA @ 25 V	2 µA @ 25 V	2 µA @ 25 V	2 µA @ 25 V
Operating Temperature - Junction (Max)	125°C	125°C	150°C	125°C	125°C	125°C	125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: BAT54SLT1G

The BAT54SLT1G is the direct equivalent manufactured by onsemi, the original manufacturer of the BAT54SLT1. This part maintains identical electrical specifications and packaging while offering active product status and RoHS3 compliance. With 410,200 units in stock, BAT54SLT1G provides the highest availability and supply chain continuity.

Secondary Recommendations:

BAT54S-E3-08 (Vishay General Semiconductor - Diodes Division) and BAT54S-G3-08 (Vishay General Semiconductor - Diodes Division) are functionally equivalent alternatives with identical electrical parameters and packaging. Both parts are RoHS3 compliant and actively manufactured. BAT54S-E3-08 is supplied in Cut Tape & Digi-Reel packaging with 77,400 units available. BAT54S-G3-08 is supplied in Tape & Reel packaging with 57,558 units available.

BAT54S-TP (Micro Commercial Co) is functionally equivalent with a forward voltage specification of 1 V @ 100 mA, which remains within acceptable operating parameters. This part is RoHS3 compliant and available in Tape & Reel packaging with 41,200 units in stock.

BAT5404E6327HTSA1 (Infineon Technologies) is functionally equivalent with an enhanced maximum junction temperature of 150°C, providing thermal margin improvement over the original specification. This part is RoHS3 compliant with 2,000 units available.

BAT54S_R1_00001 (Panjit International Inc.) is functionally equivalent with a forward voltage specification of 600 mV @ 100 mA, representing improved forward voltage performance. This part is RoHS3 compliant with 90,200 units in stock.

All substitute parts are RoHS3 compliant, addressing regulatory requirements that the obsolete BAT54SLT1 does not meet. Selection among active alternatives should be based on packaging preference, supply availability, and thermal performance requirements.

Frequently Asked Questions (FAQ)

Q: Can BAT54SLT1G be used as a direct replacement for BAT54SLT1?

A: Yes. BAT54SLT1G is manufactured by onsemi and maintains identical electrical specifications, package configuration, and functional performance. The primary difference is product status: BAT54SLT1G is active and RoHS3 compliant, while BAT54SLT1 is obsolete.

Q: What is the difference between the substitute parts in forward voltage specification?

A: Forward voltage specifications vary across manufacturers: BAT54SLT1G, BAT54S-E3-08, and BAT54S-G3-08 specify 800 mV @ 100 mA; BAT54S-TP specifies 1 V @ 100 mA; BAT54S_R1_00001 specifies 600 mV @ 100 mA. All values fall within acceptable operating ranges for Schottky diode arrays in this class. Selection should account for circuit design requirements regarding forward voltage drop.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use the TO-236-3, SC-59, SOT-23-3 package. Packaging format (Cut Tape & Digi-Reel, Tape & Reel, or other) varies by supplier and part number. Verify packaging format with your procurement requirements.

Q: Does operating temperature range affect substitution compatibility?

A: The BAT54SLT1 specifies a maximum junction temperature of 125°C. All substitute parts meet or exceed this specification. BAT5404E6327HTSA1 offers 150°C maximum junction temperature, providing additional thermal margin. Operating temperature range does not restrict substitution; higher ratings provide design flexibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts are RoHS3 compliant. The original BAT54SLT1 is RoHS non-compliant. Compliance with RoHS3 regulations is a key advantage of transitioning to active substitute parts.

Q: What is the significance of the 1 Pair Series Connection configuration?

A: The 1 Pair Series Connection indicates the diode array contains two Schottky diodes connected in series within a single package. This configuration is maintained across all substitute parts, ensuring functional equivalence in applications designed for series-connected diode pairs.

Q: Can I substitute parts from different manufacturers interchangeably?

A: Yes, within the specified electrical and mechanical parameters. All substitute parts maintain the same diode configuration, voltage ratings, current ratings, reverse recovery time, and package form factor. Differences in forward voltage and maximum junction temperature are within acceptable tolerances for this component class.

Q: What should I consider when selecting among multiple substitute options?

A: Selection criteria include: (1) supply availability and lead time; (2) packaging format preference (Cut Tape & Digi-Reel vs. Tape & Reel); (3) forward voltage specification relative to circuit design requirements; (4) maximum junction temperature margin for thermal design; (5) manufacturer preference based on supply chain strategy.

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