SL1G Equivalent & Substitute Parts

Part Overview

The SL1G is a general-purpose rectifier diode manufactured by Diotec Semiconductor, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount SOD-123F package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	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	1	µA @ 400 V
Mounting Type	Surface Mount	-
Package / Case	SOD-123F	-
Operating Temperature - Junction	-50 to 150	°C
Technology	Standard	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SL1G are qualified based on the following critical parameters that determine functional equivalence:

Electrical Parameters (Must Match):

Voltage - DC Reverse (Vr) (Max): 400 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: 1 µA @ 400 V

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package / Case: SOD-123F
Operating Temperature - Junction: -50°C to 150°C (minimum range requirement)

Compliance Parameters (Must Match):

Technology: Standard
RoHS Status: ROHS3 Compliant

All substitute parts listed maintain identical electrical ratings and mechanical compatibility with the SL1G, ensuring direct functional replacement in circuit applications.

Parameter Comparison

Parameter	SL1G (Diotec)	GS1004FL_R1_00001 (Panjit)	S1GFL (Taiwan Semi)	SL1G (Diotec)	SL1G-AQ (Diotec)
Manufacturer	Diotec Semiconductor	Panjit International Inc.	Taiwan Semiconductor Corporation	Diotec Semiconductor	Diotec Semiconductor
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 µA @ 400 V	1 µA @ 400 V	1 µA @ 400 V	1 µA @ 400 V	1 µA @ 400 V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123F	SOD-123F	SOD-123F	SOD-123F	SOD-123F
Operating Temperature - Junction	-50°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 150°C	-50°C ~ 150°C	-50°C ~ 150°C
Technology	Standard	Standard	Standard	Standard	Standard
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical equivalence to the SL1G. Selection among these alternatives is based on the following factors:

Inventory Availability:

SL1G-AQ (Diotec): 64,073 pcs available
GS1004FL_R1_00001 (Panjit): 47,100 pcs available
S1GFL (Taiwan Semiconductor): 15,520 pcs available
SL1G (Diotec): 3,418 pcs available

Compliance Status: All substitute parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Product Status: All substitute parts maintain Active product status, ensuring continued manufacturer support and availability.

Temperature Range: S1GFL provides an extended lower operating temperature limit of -55°C compared to -50°C for other alternatives, offering additional thermal margin in applications requiring lower temperature operation.

Frequently Asked Questions (FAQ)

Q: Can SL1G be directly replaced with GS1004FL_R1_00001?

A: Yes. Both components share identical electrical ratings (400 V, 1 A, 1.1 V forward voltage), standard recovery speed characteristics, and SOD-123F surface mount packaging. Mechanical and electrical compatibility is complete.

Q: What is the difference between SL1G and SL1G-AQ?

A: Both are manufactured by Diotec Semiconductor with identical electrical specifications, package type, and operating temperature range. SL1G-AQ has significantly higher inventory availability (64,073 pcs versus 3,418 pcs for SL1G).

Q: Is S1GFL compatible with the SL1G in all applications?

A: S1GFL is electrically and mechanically equivalent to SL1G. The S1GFL offers an extended lower operating temperature limit of -55°C compared to -50°C for the SL1G, providing additional thermal margin in low-temperature environments.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, meeting current environmental standards for electronic components.

Q: What packaging formats are available for these substitute parts?

A: GS1004FL_R1_00001, SL1G, and SL1G-AQ are supplied in Tape & Reel (TR) format. S1GFL is available in both Cut Tape (CT) and Digi-Reel® packaging options.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. All substitute parts use the SOD-123F surface mount package with identical pin configuration and footprint, enabling direct PCB assembly interchange without layout modifications.

Q: What is the reverse recovery time specification for these diodes?

A: The SL1G and SL1G-AQ specify a reverse recovery time (trr) of 1 µs. This parameter is not specified for GS1004FL_R1_00001 and S1GFL in the provided data, though both maintain standard recovery speed characteristics of >500ns at >200mA.

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