BAT54T1 Equivalent & Substitute Parts

Part Overview

The BAT54T1 is a Schottky detector/switching diode rated for 30 V DC reverse voltage with 200 mA average rectified current in a surface mount SOD-123 package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. Active alternatives with identical or enhanced electrical characteristics are available from multiple manufacturers, enabling seamless integration into existing and new applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	800 mV @ 100 mA	mV
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	2 µA @ 25 V	µA
Capacitance @ Vr, F	10 pF @ 1V, 1MHz	pF
Technology	Schottky	—
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—

Substitute Part Grouping Explanation

Substitution of the BAT54T1 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 30 V
Current - Average Rectified (Io): Must equal or exceed 200 mA
Mounting Type: Surface Mount
Package / Case: SOD-123 or SOD-123F (compatible footprint variants)
Technology: Schottky

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Electrical performance indicator
Reverse Recovery Time (trr): Speed classification parameter
Current - Reverse Leakage @ Vr: Leakage characteristic
Capacitance @ Vr, F: Frequency-dependent parameter
RoHS Compliance Status: Regulatory requirement for new designs

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical electrical specifications (30 V, 200 mA, SOD-123 package) from alternative manufacturers or packaging variants of the same base product.

Higher-Rated Alternatives: Parts with superior current ratings (500 mA, 1 A) or enhanced performance characteristics that maintain full backward compatibility while providing design margin and extended operational capability.

Parameter Comparison

Parameter	BAT54T1	BAT54T1G	BAT54H,115	BAT54W-E3-08	B0530W-7-F	B130LAW-7-F
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	Vishay General Semiconductor	Diodes Incorporated	Diodes Incorporated
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V	30 V	30 V	30 V
Current - Average Rectified (Io)	200 mA	200 mA	200 mA	200 mA	500 mA	1 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 100 mA	800 mV @ 100 mA	800 mV @ 100 mA	800 mV @ 100 mA	430 mV @ 500 mA	420 mV @ 1 A
Reverse Recovery Time (trr)	5 ns	5 ns	Not specified	5 ns	Not specified	Not specified
Current - Reverse Leakage @ Vr	2 µA @ 25 V	2 µA @ 25 V	2 µA @ 25 V	2 µA @ 25 V	130 µA @ 30 V	1 mA @ 30 V
Capacitance @ Vr, F	10 pF @ 1V, 1MHz	10 pF @ 1V, 1MHz	10 pF @ 1V, 1MHz	10 pF @ 1V, 1MHz	170 pF @ 0V, 1MHz	40 pF @ 10V, 1MHz
Package / Case	SOD-123	SOD-123	SOD-123F	SOD-123	SOD-123	SOD-123
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

The BAT54T1G (onsemi) is the primary direct equivalent, offering identical electrical specifications with active product status and ROHS3 compliance. This part maintains the same 30 V / 200 mA rating, forward voltage characteristics, and reverse recovery time as the obsolete BAT54T1, with significantly higher inventory availability (623,400 units).

The BAT54W-E3-08 (Vishay General Semiconductor - Diodes Division) provides an alternative direct equivalent with identical electrical performance and ROHS3 compliance. This option is suitable for applications requiring Vishay component qualification.

The BAT54H,115 (Nexperia USA Inc.) offers direct electrical equivalence with the addition of automotive-grade qualification (AEC-Q100) and is packaged in SOD-123F, a mechanically compatible variant. This part is recommended for automotive and high-reliability applications.

For Higher Current Capacity Applications:

The B0530W-7-F (Diodes Incorporated) provides 500 mA current capacity at 30 V with improved forward voltage characteristics (430 mV @ 500 mA). This part is suitable for applications requiring design margin or higher current throughput while maintaining the same package footprint.

The B130LAW-7-F (Diodes Incorporated) provides 1 A current capacity at 30 V with superior forward voltage performance (420 mV @ 1 A). This part is recommended for applications requiring maximum current handling capability within the 30 V rating.

Compliance and Regulatory Considerations:

All active substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for new product designs. The obsolete BAT54T1 is non-compliant with RoHS directives and should not be specified for new designs.

Frequently Asked Questions (FAQ)

Q: Can BAT54T1G be used as a direct replacement for BAT54T1?

A: Yes. The BAT54T1G is a direct equivalent with identical electrical specifications (30 V, 200 mA, 800 mV forward voltage @ 100 mA, 5 ns reverse recovery time) and compatible SOD-123 package. The primary difference is product status (active vs. obsolete) and regulatory compliance (ROHS3 compliant).

Q: What is the difference between SOD-123 and SOD-123F packages?

A: Both packages are mechanically and electrically compatible for PCB footprint purposes. SOD-123F is a variant designation used by some manufacturers. The BAT54H,115 in SOD-123F is functionally equivalent to BAT54T1 in SOD-123.

Q: Can higher-rated parts like B0530W-7-F or B130LAW-7-F replace BAT54T1?

A: Yes. Both parts maintain the 30 V reverse voltage rating and are backward compatible with BAT54T1 applications. The higher current ratings (500 mA and 1 A respectively) provide design margin and do not create incompatibility. However, the increased reverse leakage current and capacitance characteristics should be evaluated for applications sensitive to these parameters.

Q: Why does BAT54T1 show as obsolete?

A: The BAT54T1 is classified as obsolete due to its RoHS non-compliance and the availability of active, compliant alternatives. Modern designs require ROHS3-compliant components, making the BAT54T1 unsuitable for new product development.

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

A: Substitute parts are available in Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) packaging. Specific packaging availability varies by manufacturer and distributor. Verify packaging requirements with your procurement source.

Q: What is the operating temperature range for BAT54T1 substitutes?

A: Operating temperature ranges vary by manufacturer: BAT54T1G operates from -55°C to 125°C; B0530W-7-F operates from -65°C to 125°C; B130LAW-7-F operates from -55°C to 125°C; BAT54H,115 and BAT54W-E3-08 specify 125°C maximum junction temperature. Verify temperature requirements for your specific application.

Q: Is automotive qualification available for BAT54T1 substitutes?

A: Yes. The BAT54H,115 (Nexperia) carries AEC-Q100 automotive qualification and is suitable for automotive-grade applications requiring this certification.

Q: How do reverse leakage characteristics differ among substitutes?

A: BAT54T1, BAT54T1G, BAT54H,115, and BAT54W-E3-08 all specify 2 µA @ 25 V leakage. B0530W-7-F specifies 130 µA @ 30 V, and B130LAW-7-F specifies 1 mA @ 30 V. Applications sensitive to leakage current should prioritize the lower-leakage options.

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