LL4002G L0 Equivalent & Substitute Parts

Part Overview

The LL4002G L0 is a general-purpose rectifier diode rated for 100 V DC reverse voltage and 1 A average rectified current in a surface mount MELF package. Manufactured by Taiwan Semiconductor Corporation, this component is classified as obsolete. Due to its obsolete status and limited inventory availability (759 pieces), identifying equivalent and substitute parts from active manufacturers is necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 µA @ 100 V
Capacitance @ Vr, F	15pF @ 4V, 1MHz
Mounting Type	Surface Mount
Package / Case	DO-213AB, MELF
Operating Temperature - Junction	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LL4002G L0 are selected based on electrical and mechanical compatibility within the following criteria:

Electrical Parameters (Critical for Substitution):

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 1 A
Mounting Type: Surface Mount
Package / Case: DO-213AB, MELF

Acceptable Parameter Variations:

Forward Voltage (Vf): The LL4002G L0 specifies 1.1 V @ 1 A. Substitute parts with Vf up to 1.3 V @ 1 A are functionally compatible for general-purpose rectification applications.
Recovery Speed: The LL4002G L0 operates at Standard Recovery (>500ns). Substitute parts with Fast Recovery (≤500ns) are compatible and offer improved performance characteristics.
Reverse Leakage Current: The LL4002G L0 specifies 5 µA @ 100 V. Substitute parts with up to 10 µA @ 100 V remain within acceptable limits for general-purpose applications.
Capacitance: The LL4002G L0 specifies 15pF @ 4V, 1MHz. Substitute parts with 8pF @ 4V, 1MHz are compatible.
Operating Temperature Range: The LL4002G L0 operates from -65°C to 150°C. Substitute parts with extended ranges (-65°C to 175°C) are compatible.

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Unaffected
ECCN: EAR99

All substitute parts listed meet these criteria and are sourced from active manufacturers with confirmed inventory availability.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Reverse Leakage @ Vr	Capacitance @ Vr, F	Package	Tj (Operating)	Product Status
LL4002G L0	Taiwan Semiconductor Corporation	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	5 µA @ 100 V	15pF @ 4V, 1MHz	DO-213AB, MELF	-65°C ~ 150°C	Obsolete
1N6479-E3/96	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
1N6479-E3/97	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
1N6479HE3/96	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
1N6479HE3/97	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
BYM10-100-E3/96	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
BYM10-100-E3/97	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
BYM10-100HE3/96	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
BYM10-100HE3/97	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns, > 200mA	10 µA @ 100 V	8pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
BYM11-100-E3/96	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns, > 200mA	5 µA @ 100 V	15pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active
BYM11-100-E3/97	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns, > 200mA	5 µA @ 100 V	15pF @ 4V, 1MHz	DO-213AB, MELF (Glass)	-65°C ~ 175°C	Active

Engineering Selection Recommendations

Primary Substitutes (Closest Electrical Match):

The 1N6479 series (1N6479-E3/96, 1N6479-E3/97, 1N6479HE3/96, 1N6479HE3/97) from Vishay General Semiconductor - Diodes Division provide the most direct substitution for the LL4002G L0. These parts maintain identical electrical specifications for reverse voltage (100 V), average rectified current (1 A), and forward voltage (1.1 V @ 1 A). All variants are active products with confirmed inventory availability ranging from 802 to 1129 pieces. These parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) rating, matching the compliance profile of the original part.

Secondary Substitutes (Avalanche Technology):

The BYM10 series (BYM10-100-E3/96, BYM10-100-E3/97, BYM10-100HE3/96, BYM10-100HE3/97) from Vishay General Semiconductor - Diodes Division utilize Avalanche technology and maintain the same electrical ratings as the 1N6479 series. These parts are active products with higher inventory availability (907 to 6814 pieces). The Avalanche technology provides enhanced reverse voltage capability and is suitable for applications requiring additional overvoltage protection.

Alternative Substitutes (Fast Recovery Technology):

The BYM11 series (BYM11-100-E3/96, BYM11-100-E3/97) from Vishay General Semiconductor - Diodes Division employ Fast Recovery technology with recovery time of 150 ns (compared to Standard Recovery >500ns in the original part). These parts feature forward voltage of 1.3 V @ 1 A and reverse leakage current of 5 µA @ 100 V, matching the original part's leakage specification. The BYM11 series is suitable for applications where faster switching performance is beneficial. Inventory availability is substantial (1033 to 123702 pieces).

Selection Criteria:

For direct replacement with identical performance characteristics: Select from the 1N6479 series.
For enhanced overvoltage protection: Select from the BYM10 series.
For improved switching speed: Select from the BYM11 series.
All substitute parts are active products from established manufacturers with long-term availability assurance.
All substitute parts meet RoHS3 compliance and REACH requirements.
All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the 1N6479-E3/96 directly replace the LL4002G L0?

A: Yes. The 1N6479-E3/96 maintains identical electrical specifications for reverse voltage (100 V), average rectified current (1 A), and forward voltage (1.1 V @ 1 A). Both parts use the DO-213AB MELF package for surface mount applications. The 1N6479-E3/96 is an active product with confirmed inventory availability.

Q: What is the difference between the 1N6479 and BYM10 series?

A: Both series maintain identical electrical ratings (100 V, 1 A, 1.1 V forward voltage). The primary difference is the semiconductor technology: 1N6479 uses Standard technology, while BYM10 uses Avalanche technology. Avalanche diodes provide enhanced reverse voltage capability and are suitable for applications requiring additional overvoltage protection.

Q: Why does the BYM11 series have a higher forward voltage (1.3 V vs. 1.1 V)?

A: The BYM11 series employs Fast Recovery technology with a recovery time of 150 ns, compared to Standard Recovery (>500ns) in the original part and other substitutes. The higher forward voltage is a characteristic of this faster switching technology. The BYM11 series is suitable for applications where improved switching speed provides system-level benefits that offset the slightly higher forward voltage drop.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original LL4002G L0.

Q: What is the difference between the -E3/96 and -E3/97 variants?

A: The -E3/96 and -E3/97 designations represent different manufacturing date codes or tape reel specifications. Both variants maintain identical electrical specifications and are functionally interchangeable. Selection between these variants is based on packaging preference and inventory availability.

Q: Can I use the BYM11-100-E3/96 in a circuit designed for the LL4002G L0?

A: The BYM11-100-E3/96 is electrically compatible with the LL4002G L0 for the core rectification function. However, the higher forward voltage (1.3 V vs. 1.1 V) and faster recovery time (150 ns vs. >500ns) may affect circuit performance in applications with tight voltage budgets or specific timing requirements. Verification of circuit performance is necessary for applications where these parameter differences are critical.

Q: What is the moisture sensitivity level (MSL) for all substitute parts?

A: All substitute parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture control requirements. This matches the original LL4002G L0 specification.

Q: Which substitute part has the highest inventory availability?

A: The BYM11-100-E3/96 has the highest inventory availability with 123702 pieces in stock, followed by BYM10-100-E3/96 with 6814 pieces. The 1N6479 series variants range from 802 to 1129 pieces.

Q: Are the substitute parts available in different packaging options?

A: Yes. The 1N6479-E3/96 and 1N6479-E3/97 are available in Tape & Reel (TR) packaging. The BYM10-100-E3/96 and BYM10-100-E3/97 are available in Cut Tape (CT) & Digi-Reel® packaging. The 1N6479HE3 and BYM10-100HE3 variants do not specify packaging type. The BYM11 series is available in Tape & Reel (TR) packaging. Selection of packaging type depends on assembly equipment and production requirements.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts operate from -65°C to 175°C junction temperature, which exceeds the original LL4002G L0 specification of -65°C to 150°C. This extended temperature range provides additional design margin for applications operating at elevated temperatures.

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