SL34AFL-TP Equivalent & Substitute Parts

Part Overview

The SL34AFL-TP is an active Schottky rectifier diode manufactured by Micro Commercial Co, rated for 40 V DC reverse voltage and 3 A average rectified current in a surface mount DO-221AC (SMA Flat Leads) package. This component is designed for fast recovery applications with switching speeds ≤ 500 ns at currents > 200 mA. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-221AC, SMA Flat Leads	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SL34AFL-TP are identified based on electrical and mechanical compatibility within the following criteria:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Package / Case: DO-221AC, SMA Flat Leads
Mounting Type: Surface Mount
Technology: Schottky
Operating Temperature Range: -55°C to 150°C
Speed Classification: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Allowable Variation Parameters:

Current - Average Rectified (Io): Equal to or greater than 3 A
Voltage - Forward (Vf) (Max) @ If: Within acceptable forward voltage specification
Current - Reverse Leakage @ Vr: Equal to or less than 500 µA @ 40 V

The B140AF-13 from Diodes Incorporated meets the mandatory matching criteria for voltage rating, package type, mounting configuration, and temperature range. However, the current rating of 1 A is below the 3 A requirement of the main part, restricting its use to applications with lower current demands.

Parameter Comparison

Parameter	SL34AFL-TP (Micro Commercial Co)	B140AF-13 (Diodes Incorporated)
Voltage - DC Reverse (Vr) (Max)	40 V	40 V
Current - Average Rectified (Io)	3 A	1 A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 3 A	500 mV @ 1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V	200 µA @ 40 V
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-221AC, SMA Flat Leads	DO-221AC, SMA Flat Leads
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C
Technology	Schottky	Schottky
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SL34AFL-TP (Primary Component)

The SL34AFL-TP is the specified component for applications requiring 3 A average rectified current at 40 V reverse voltage. This part is active, ROHS3 compliant, and carries unlimited moisture sensitivity classification (MSL 1), suitable for standard manufacturing and storage conditions. The 450 mV forward voltage drop at 3 A and 500 µA reverse leakage at 40 V define the baseline performance envelope.

B140AF-13 (Substitute with Current Limitation)

The B140AF-13 is electrically and mechanically compatible with the SL34AFL-TP for applications where the average rectified current requirement does not exceed 1 A. Both components share identical voltage ratings (40 V), package configuration (DO-221AC, SMA Flat Leads), temperature operating range (-55°C to 150°C), and fast recovery speed classification. The B140AF-13 exhibits lower reverse leakage (200 µA vs. 500 µA at 40 V), which may provide performance advantages in low-leakage applications. However, the 1 A current rating restricts substitution to lower-power circuit designs. Both parts are ROHS3 compliant and carry MSL 1 classification.

Frequently Asked Questions (FAQ)

Q: Can the B140AF-13 be used as a direct replacement for the SL34AFL-TP in all applications?

A: No. The B140AF-13 is rated for 1 A average rectified current, while the SL34AFL-TP is rated for 3 A. Direct substitution is limited to circuits where the actual operating current does not exceed 1 A. Exceeding this rating will result in component failure or degraded performance.

Q: Are the package dimensions identical between SL34AFL-TP and B140AF-13?

A: Both components use the DO-221AC (SMA Flat Leads) package configuration. Physical dimensions and PCB footprints are compatible for surface mount assembly.

Q: What is the difference in forward voltage drop between these parts?

A: The SL34AFL-TP exhibits 450 mV forward voltage drop at 3 A, while the B140AF-13 exhibits 500 mV at 1 A. Forward voltage characteristics are current-dependent and cannot be directly compared across different current ratings.

Q: Are both parts compliant with environmental and regulatory standards?

A: Yes. Both the SL34AFL-TP and B140AF-13 are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity). Both carry EAR99 export classification and HTSUS code 8541.10.0080.

Q: What is the reverse leakage current specification for each part?

A: The SL34AFL-TP specifies 500 µA reverse leakage at 40 V. The B140AF-13 specifies 200 µA reverse leakage at 40 V. Lower reverse leakage in the B140AF-13 may be advantageous in precision analog circuits or high-impedance applications.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: Both parts meet the fast recovery speed specification (≤ 500 ns at > 200 mA). Interchangeability in switching applications depends on the actual circuit current requirements. The 3 A rating of the SL34AFL-TP supports higher-frequency, higher-current switching designs compared to the 1 A B140AF-13.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message