BAT54/LF1R Equivalent & Substitute Parts

Part Overview

The BAT54/LF1R is a Schottky diode manufactured by NXP USA Inc. in the TO-236AB surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design requirements and production needs. The BAT54 base product series remains in active production across multiple manufacturers, providing viable alternatives for applications requiring Schottky rectifier functionality in compact surface mount form factors.

Substiute Parts

BAT54/LF1R

NXP USA Inc.In Stock: 776BAT54/LF1R Datasheet

Current PartRFQ

BAT54,215

Nexperia USA Inc.In Stock: 546192BAT54,215 Datasheet

DirectRFQ

BAT54-7-F

Diodes IncorporatedIn Stock: 443299BAT54-7-F Datasheet

DirectRFQ

BAT54ATA

Diodes IncorporatedIn Stock: 145406BAT54ATA Datasheet

DirectRFQ

BAT54-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 19308BAT54-E3-18 Datasheet

MFR RecommendedRFQ

BAT54-G3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 27127BAT54-G3-08 Datasheet

MFR RecommendedRFQ

BAT54-HE3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 28504BAT54-HE3-18 Datasheet

MFR RecommendedRFQ

SMMBD301LT3G

onsemiIn Stock: 5883SMMBD301LT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAT54/LF1R is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io): 200 mA
• Technology: Schottky
• Speed Classification: Small Signal ≤ 200 mA (Io), Any Speed
• Reverse Recovery Time (trr): 5 ns

Mechanical Parameters:

• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional equivalence within the BAT54 product family. Variations in forward voltage characteristics, reverse leakage current, and capacitance do not preclude substitution when the primary electrical ratings remain within specified limits.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance):

The following parts are recommended as primary substitutes due to active product status and complete ROHS3 and REACH compliance:

• BAT54,215 (Nexperia USA Inc.): Active status with 546,150 units in stock. Meets all electrical specifications at 30 V, 200 mA with 5 ns reverse recovery time. Operating temperature range extends to 150°C maximum junction temperature.

• BAT54-7-F (Diodes Incorporated): Active status with 443,200 units in stock. Identical electrical specifications with extended operating temperature range of -65°C to 150°C, providing broader thermal envelope for applications with extreme temperature requirements.

• BAT54-E3-18 (Vishay General Semiconductor - Diodes Division): Active status with 19,258 units in stock. Meets all core electrical specifications with Tape & Reel packaging option.

• BAT54-G3-08 (Vishay General Semiconductor - Diodes Division): Active status with 27,102 units in stock. Identical electrical specifications with Cut Tape & Digi-Reel packaging.

Secondary Substitutes (Specialized Applications):

• BAT54-HE3-18 (Vishay General Semiconductor - Diodes Division): Last Time Buy status with 28,402 units in stock. Automotive grade with AEC-Q101 qualification. Suitable for automotive applications requiring certified Schottky rectifier performance.

• SMMBD301LT3G (onsemi): Active status with 5,797 units in stock. Automotive grade with AEC-Q101 qualification. Superior reverse leakage characteristics (200 nA @ 25 V) and lower capacitance (1.5 pF @ 15V) compared to standard BAT54 variants. Operating temperature range -55°C to 125°C. Suitable for high-reliability and automotive applications where leakage minimization is critical.

Secondary Substitute (Diode Array Configuration):

• BAT54ATA (Diodes Incorporated): Active status with 145,390 units in stock. Diode array configuration with 1 pair common anode. Electrical specifications match core requirements at 30 V, 200 mA. Forward voltage specification is 1 V @ 100 mA, which is within acceptable tolerance. Suitable for applications requiring integrated dual-diode functionality.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original BAT54/LF1R specification.

Frequently Asked Questions (FAQ)

Q: Why is the BAT54/LF1R classified as obsolete?

A: The BAT54/LF1R is an NXP USA Inc. manufactured variant that has been discontinued. However, the BAT54 base product series remains in active production across multiple manufacturers including Nexperia, Diodes Incorporated, Vishay, and onsemi, ensuring continued availability of functionally equivalent components.

Q: What are the critical electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: Voltage - DC Reverse (Vr) of 30 V, Current - Average Rectified (Io) of 200 mA, Schottky technology classification, Small Signal speed category (≤ 200 mA), and Reverse Recovery Time (trr) of 5 ns. All listed substitutes meet these specifications.

Q: Are all substitute parts pin-compatible with the BAT54/LF1R?

A: Yes. All substitute parts use the TO-236-3, SC-59, or SOT-23-3 package designation, which are mechanically and electrically equivalent surface mount packages. Pin configuration and footprint compatibility are maintained across all listed substitutes.

Q: What is the difference between BAT54-7-F and BAT54,215?

A: Both parts meet identical electrical specifications at 30 V, 200 mA with 5 ns reverse recovery time. The primary difference is operating temperature range: BAT54-7-F operates from -65°C to 150°C, while BAT54,215 operates to 150°C maximum. BAT54-7-F is preferred for applications requiring extended low-temperature performance.

Q: Why would I select SMMBD301LT3G over standard BAT54 variants?

A: SMMBD301LT3G is selected for applications requiring automotive qualification (AEC-Q101), superior reverse leakage characteristics (200 nA @ 25 V versus 2 µA), and lower capacitance (1.5 pF @ 15V). These characteristics are beneficial in high-reliability applications and circuits sensitive to leakage current or capacitive loading.

Q: Is BAT54ATA a direct substitute for BAT54/LF1R?

A: BAT54ATA is functionally equivalent but differs in configuration: it is a diode array with 1 pair common anode rather than a single diode. It is suitable for applications where dual-diode functionality with common anode connection is required. Forward voltage is specified at 1 V @ 100 mA, which is within acceptable tolerance for BAT54 applications.

Q: What is the significance of the Last Time Buy status for BAT54-HE3-18?

A: Last Time Buy status indicates that Vishay will discontinue this part after a specified date. While currently available with 28,402 units in stock, long-term designs should transition to active status alternatives such as BAT54-G3-08 or BAT54-E3-18 from the same manufacturer.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compatibility with the original BAT54/LF1R specification.

Q: What packaging options are available for BAT54 substitutes?

A: Packaging options include Cut Tape (CT) & Digi-Reel, Tape & Reel (TR), and Cut Tape (CT) variants. Selection depends on production volume and assembly requirements. All variants maintain identical electrical and mechanical specifications.

Q: Can I use BAT54 substitutes in reverse polarity applications?

A: No. Schottky diodes are polarized components. All BAT54 variants and substitutes must be oriented correctly with respect to forward and reverse bias. Reverse polarity connection will result in component failure or circuit malfunction.