LL4003G L0 Equivalent & Substitute Parts

Part Overview

The LL4003G L0 is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 1 A average rectified current in a surface mount MELF package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts satisfy the same functional requirements within the allowed parameter ranges for this diode category.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the LL4003G L0 is determined by equivalence in the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 1 A
Mounting Type: Surface Mount
Package / Case: DO-213AB or MELF

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Up to 1.1 V @ 1 A
Current - Reverse Leakage @ Vr: Up to 10 µA @ 200 V
Capacitance @ Vr, F: Up to 15 pF @ 4V, 1MHz
Operating Temperature - Junction: -65°C minimum, 150°C minimum upper limit
Recovery Speed: Standard or faster recovery characteristics

All substitute parts listed maintain the mandatory electrical and mechanical parameters. Variations in forward voltage, reverse leakage, and capacitance remain within acceptable ranges for general-purpose rectification applications. All substitute parts are RoHS3 compliant and MSL 1 rated.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	Reverse Leakage @ Vr [µA]	Capacitance @ 4V, 1MHz [pF]	Tj (Max) [°C]	Product Status	Technology
LL4003G L0	Taiwan Semiconductor Corporation	200	1	1.1	5	15	150	Obsolete	Standard
1N6480-E3/96	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Standard
1N6480-E3/97	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Standard
1N6480HE3/96	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Standard
1N6480HE3/97	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Standard
BYM10-200-E3/96	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Avalanche
BYM10-200-E3/97	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Avalanche
BYM10-200HE3/96	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Avalanche
BYM10-200HE3/97	Vishay General Semiconductor	200	1	1.1	10	8	175	Active	Avalanche
BYM11-200-E3/96	Vishay General Semiconductor	200	1	1.3	5	15	175	Active	Standard
BYM11-200-E3/97	Vishay General Semiconductor	200	1	1.3	5	15	175	Active	Standard

Engineering Selection Recommendations

Primary Substitutes (Closest Electrical Match):

The 1N6480 series (1N6480-E3/96, 1N6480-E3/97, 1N6480HE3/96, 1N6480HE3/97) from Vishay General Semiconductor provides direct functional equivalence to the LL4003G L0. These parts maintain identical voltage and current ratings, forward voltage characteristics, and recovery speed classification. All variants are active products with RoHS3 compliance and MSL 1 rating. The 1N6480-E3/96 and 1N6480-E3/97 are available in Tape & Reel packaging with higher inventory levels (46,012 and 893 units respectively).

Secondary Substitutes (Avalanche Technology):

The BYM10 series (BYM10-200-E3/96, BYM10-200-E3/97, BYM10-200HE3/96, BYM10-200HE3/97) offers avalanche-rated technology while maintaining the same voltage, current, and forward voltage specifications. These parts are suitable for applications requiring avalanche protection. The BYM10-200-E3/97 variant has the highest inventory availability at 39,758 units.

Alternative Substitutes (Fast Recovery):

The BYM11 series (BYM11-200-E3/96, BYM11-200-E3/97) provides fast recovery characteristics (≤500 ns, >200 mA) with reverse recovery time of 150 ns. Forward voltage is specified at 1.3 V @ 1 A, which remains within acceptable substitution parameters. Reverse leakage and capacitance match the original LL4003G L0 specifications. Both variants are active products with full compliance certifications.

All recommended substitutes are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0080, matching the regulatory status of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 1N6480-E3/96 directly replace the LL4003G L0 in existing designs?

A: Yes. The 1N6480-E3/96 maintains identical voltage (200 V), current (1 A), and forward voltage (1.1 V @ 1 A) specifications. Both use DO-213AB MELF surface mount packaging. The primary difference is the extended operating temperature range (175°C vs. 150°C) and lower reverse leakage (10 µA vs. 5 µA), which are improvements over the original specification.

Q: What is the difference between the 1N6480 and BYM10 series?

A: Both series maintain identical voltage, current, and forward voltage ratings. The BYM10 series incorporates avalanche technology, providing additional protection against reverse voltage transients. The BYM10 is suitable for applications requiring avalanche-rated diodes, while the 1N6480 is a standard rectifier. Selection depends on application requirements for transient protection.

Q: Why do some part numbers include "HE3" designation?

A: The "HE3" designation indicates a specific packaging variant or manufacturing code from Vishay. Electrically and functionally, 1N6480-E3/96 and 1N6480HE3/96 are equivalent. The designation does not affect substitution compatibility.

Q: Are the -E3/96 and -E3/97 variants interchangeable?

A: Yes. Both variants maintain identical electrical specifications. The suffix difference (96 vs. 97) represents manufacturing date codes or tape reel configurations. Functionally, they are interchangeable for circuit applications.

Q: What is the significance of the BYM11 series having 1.3 V forward voltage instead of 1.1 V?

A: The BYM11 series incorporates fast recovery technology (≤500 ns) with a specified reverse recovery time of 150 ns. The higher forward voltage (1.3 V @ 1 A) is characteristic of this technology. This 0.2 V difference remains within acceptable substitution parameters for general-purpose rectification. Selection of BYM11 is appropriate when fast recovery characteristics are required by the application.

Q: Is the LL4003G L0 still available for procurement?

A: The LL4003G L0 is classified as obsolete. Current inventory is limited to 1,122 units. For new designs and ongoing procurement, active substitutes from the 1N6480, BYM10, or BYM11 series are recommended to ensure long-term supply chain continuity.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All listed substitute parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is MSL 1 (unlimited) for all variants, matching the original LL4003G L0 specifications.

Q: Which substitute offers the best inventory availability?

A: The BYM10-200-E3/97 offers the highest inventory level at 39,758 units, followed by BYM10-200-E3/96 with 20,200 units. Both are active products with Tape & Reel packaging suitable for automated assembly.

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