LL4148-13 Equivalent & Substitute Parts

Part Overview

The LL4148-13 is a general-purpose rectifier diode rated for 75 V DC reverse voltage and 150 mA average rectified current in a surface mount SOD-80 MiniMELF package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts with active availability are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	75 V
Current - Average Rectified (Io)	150 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 50 mA
Reverse Recovery Time (trr)	8 ns
Current - Reverse Leakage @ Vr	5 µA @ 75 V
Capacitance @ Vr, F	4 pF @ 0 V, 1 MHz
Package / Case	DO-213AC, MINI-MELF, SOD-80
Mounting Type	Surface Mount
Operating Temperature - Junction (Max)	175°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LL4148-13 is determined by the following critical parameters: DC reverse voltage rating (75 V), average rectified current capacity (150 mA), forward voltage characteristics, package type (SOD-80 MiniMELF), and surface mount compatibility. All substitute parts must maintain the same voltage and current ratings to ensure functional equivalence in the circuit.

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes: Parts from the same manufacturer (Vishay) with identical or higher current ratings and active product status.

Parametric Equivalents: Parts from alternative manufacturers or different product lines that match the electrical specifications of the LL4148-13, including voltage, current, and package requirements.

Parameter Comparison

Parameter	LL4148-13	LL4148-GS18	LS4148-GS08	LS4148-GS18	CDSL4148-G
Manufacturer	Vishay	Vishay	Vishay	Vishay	Comchip Technology
Product Status	Obsolete	Active	Active	Active	Obsolete
Voltage - DC Reverse (Vr) (Max)	75 V	75 V	75 V	75 V	75 V
Current - Average Rectified (Io)	150 mA	300 mA	150 mA	150 mA	150 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 50 mA	1 V @ 50 mA	1 V @ 50 mA	1 V @ 50 mA	1 V @ 100 mA
Reverse Recovery Time (trr)	8 ns	4 ns	8 ns	8 ns	4 ns
Current - Reverse Leakage @ Vr	5 µA @ 75 V	5 µA @ 75 V	5 µA @ 75 V	5 µA @ 75 V	2.5 µA @ 75 V
Capacitance @ Vr, F	4 pF @ 0 V, 1 MHz	4 pF @ 0 V, 1 MHz	4 pF @ 0 V, 1 MHz	4 pF @ 0 V, 1 MHz	4 pF @ 0 V, 1 MHz
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction (Max)	175°C	175°C	175°C	175°C	175°C
Grade	Automotive	Not specified	Automotive	Automotive	Not specified
Qualification	AEC-Q101	Not specified	AEC-Q101	AEC-Q101	Not specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

LS4148-GS08 and LS4148-GS18 are the primary recommended substitutes for the LL4148-13. Both parts are manufactured by Vishay General Semiconductor - Diodes Division with active product status, ensuring long-term availability. These parts maintain identical electrical specifications including 75 V reverse voltage, 150 mA average rectified current, and 8 ns reverse recovery time. Both carry automotive grade designation and AEC-Q101 qualification, matching the compliance profile of the original part. LS4148-GS08 and LS4148-GS18 are functionally equivalent with no performance trade-offs.

LL4148-GS18 is a direct manufacturer substitute from Vishay with higher current capacity (300 mA) and faster recovery time (4 ns). This part is suitable for applications where increased current headroom or faster switching performance is beneficial. The higher current rating ensures compatibility in circuits designed for the LL4148-13 without risk of current limitation.

CDSL4148-G from Comchip Technology is a parametric equivalent with matching voltage and current ratings. However, this part carries obsolete product status, limiting its suitability for new designs requiring long-term component availability. The CDSL4148-G exhibits lower reverse leakage current (2.5 µA) and faster recovery time (4 ns) compared to the LL4148-13, but lacks automotive grade and AEC-Q101 qualification.

For applications requiring automotive compliance and long-term supply assurance, LS4148-GS08 or LS4148-GS18 are the optimal selections.

Frequently Asked Questions (FAQ)

Q: Can LL4148-GS18 be used as a direct replacement for LL4148-13?

A: Yes. LL4148-GS18 is a direct manufacturer substitute with identical voltage and current ratings. The higher current capacity (300 mA versus 150 mA) and faster recovery time (4 ns versus 8 ns) provide enhanced performance margins without circuit modification.

Q: What is the difference between LS4148-GS08 and LS4148-GS18?

A: Both parts are parametric equivalents with identical electrical specifications: 75 V reverse voltage, 150 mA average rectified current, and 8 ns reverse recovery time. The primary difference is packaging format and inventory availability. Both are suitable substitutes for the LL4148-13.

Q: Are all substitute parts compatible with the SOD-80 MiniMELF footprint?

A: Yes. All listed substitute parts use the DO-213AC, MINI-MELF, SOD-80 package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the LL4148-13.

Q: Does CDSL4148-G meet automotive requirements?

A: CDSL4148-G does not carry automotive grade designation or AEC-Q101 qualification. For applications requiring automotive compliance, LS4148-GS08 or LS4148-GS18 are the appropriate selections.

Q: Why is the LL4148-13 listed as obsolete?

A: The LL4148-13 has reached end-of-life status with the manufacturer. Active substitute parts with equivalent or superior specifications are available to support ongoing production and new design requirements.

Q: What is the significance of the reverse recovery time difference between LL4148-13 and LL4148-GS18?

A: LL4148-GS18 has a faster reverse recovery time (4 ns versus 8 ns). This characteristic indicates faster switching performance, which may reduce switching losses in high-frequency applications. Both parts are functionally compatible in circuits designed for the LL4148-13.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, meeting environmental and regulatory requirements equivalent to the LL4148-13.

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