S1GL RTG Equivalent & Substitute Parts

Part Overview

The S1GL RTG is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 1 A average rectified current in a Sub SMA surface mount package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts become necessary when the primary part number reaches end-of-life status, experiences supply constraints, or when design requirements permit operation within the electrical and mechanical parameters of alternative qualified components. The S1GL RTG maintains compatibility with substitute parts that share identical or superior electrical ratings and identical package specifications.

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
Reverse Recovery Time (trr)	1.8	µs
Current - Reverse Leakage @ Vr	5 @ 400 V	µA
Capacitance @ Vr, F	9 @ 4V, 1MHz	pF
Package / Case	DO-219AB	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the S1GL RTG is determined by the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Package / Case: DO-219AB (Sub SMA)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Allowable Variation Criteria:

Current - Average Rectified (Io): Equal or greater than 1 A
Voltage - Forward (Vf) (Max) @ If: Equal or less than 1.1 V @ 1 A
Reverse Recovery Time (trr): Equal or less than 1.8 µs
Current - Reverse Leakage @ Vr: Equal or less than 5 µA @ 400 V
Operating Temperature - Junction: Range must encompass -55°C to 175°C or higher

Substitute parts S07G-GS08 and S07G-GS18 operate at reduced average rectified current (700 mA) compared to the primary specification (1 A). These parts are suitable for applications where the circuit design permits operation at the lower current rating while maintaining all other electrical and thermal characteristics within acceptable limits.

Parameter Comparison

Parameter	S1GL RTG (Main)	S1GL (Parametric Equivalent)	S07G-GS08 (Similar)	S07G-GS18 (Similar)
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Product Status	Active	Not For New Designs	Active	Active
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	700 mA	700 mA
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
Reverse Recovery Time (trr)	1.8 µs	1.8 µs	1.8 µs	1.8 µs
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	10 µA @ 400 V	10 µA @ 200 V
Capacitance @ Vr, F	9 pF @ 4V, 1MHz	9 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C to 175°C	-55°C to 175°C	-55°C to 150°C	-55°C to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Qualification	-	-	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

S1GL (Parametric Equivalent): The S1GL from Taiwan Semiconductor Corporation is a parametric equivalent with identical electrical specifications and package configuration. However, this part carries "Not For New Designs" product status. Selection of this substitute is appropriate only for legacy system maintenance, repair operations, or continuation of existing production runs where design changes are not feasible. For new design implementations, the S1GL RTG (Active status) remains the preferred primary selection.

S07G-GS08 and S07G-GS18 (Similar Alternatives): Both Vishay General Semiconductor parts maintain Active product status and carry AEC-Q101 automotive qualification. These components are suitable substitutes when circuit design permits operation at 700 mA average rectified current instead of the primary 1 A specification. The reduced current rating does not affect voltage, forward drop, or recovery time characteristics. The maximum junction temperature of 150°C is 25°C lower than the primary part; this difference must be evaluated against the specific thermal environment of the application. Both parts are available in high inventory quantities, supporting supply chain continuity.

Selection between S07G-GS08 and S07G-GS18 depends on reverse leakage current requirements at specific voltage conditions. S07G-GS08 specifies 10 µA @ 400 V, while S07G-GS18 specifies 10 µA @ 200 V. Applications requiring leakage specification at full 400 V rating should reference S07G-GS08.

Frequently Asked Questions (FAQ)

Q: Can the S1GL RTG be directly replaced with the S1GL (Parametric Equivalent)?

A: Direct replacement is electrically and mechanically compatible. Both parts share identical voltage ratings, current ratings, forward voltage drop, recovery time, and DO-219AB package specifications. However, the S1GL carries "Not For New Designs" status. Replacement is appropriate for maintenance and repair of existing systems but not recommended for new product development.

Q: What is the primary difference between the S1GL RTG and the Vishay S07G-GS08 / S07G-GS18 parts?

A: The primary difference is average rectified current rating: S1GL RTG is rated for 1 A, while both Vishay parts are rated for 700 mA. All other electrical parameters (voltage, forward drop, recovery time) are identical. The Vishay parts also feature AEC-Q101 automotive qualification and operate at a maximum junction temperature of 150°C versus 175°C for the S1GL RTG.

Q: Can I use S07G-GS08 or S07G-GS18 in an application designed for 1 A operation?

A: Substitution is permissible only if the actual circuit current demand does not exceed 700 mA. The lower current rating of the Vishay parts does not affect voltage handling, forward voltage drop, or switching characteristics. Circuit analysis must confirm that peak and average current requirements remain below 700 mA under all operating conditions, including transient events.

Q: Are there packaging differences between these substitute parts?

A: All parts use the DO-219AB (Sub SMA) surface mount package. Mechanical dimensions, PCB footprint, and reflow soldering profiles are identical. No layout or assembly process changes are required when substituting between these parts.

Q: What is the significance of AEC-Q101 qualification on the Vishay parts?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts carrying this qualification have undergone additional reliability testing and are approved for automotive applications. This qualification does not affect electrical performance but indicates suitability for automotive-grade reliability requirements.

Q: How do the reverse leakage current specifications differ between substitute options?

A: S1GL RTG specifies 5 µA @ 400 V. S07G-GS08 specifies 10 µA @ 400 V. S07G-GS18 specifies 10 µA @ 200 V. Applications sensitive to reverse leakage at full 400 V rating should prioritize S1GL RTG or S1GL. The Vishay parts exhibit higher leakage but remain within acceptable limits for general-purpose rectification applications.

Q: What inventory considerations apply to these substitute parts?

A: S1GL RTG has 895 pieces in stock. S1GL (Parametric Equivalent) has 30,400 pieces available. S07G-GS08 has 658,490 pieces in stock. S07G-GS18 has 95,100 pieces available. The Vishay alternatives offer significantly higher inventory availability, supporting extended production runs and reducing supply chain risk.

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