S1GL RHG Equivalent & Substitute Parts

Part Overview

The S1GL RHG 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, inventory constraints occur, or design requirements necessitate alternative qualified sources. The S1GL RHG maintains electrical and mechanical compatibility with specific alternative diode models that share identical or functionally equivalent parameters within the rectifier diode category.

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	µA @ 400 V
Capacitance @ Vr, F	9	pF @ 4V, 1MHz
Package / Case	DO-219AB	Sub SMA
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1	Unlimited

Substitute Part Grouping Explanation

Substitution eligibility for the S1GL RHG is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Package / Case: DO-219AB (Sub SMA)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

Reverse Recovery Time (trr): 1.8 µs
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
Current - Reverse Leakage @ Vr: ≤ 5 µA @ 400 V

Substitute parts are grouped into two categories:

Parametric Equivalent: S1GL (Taiwan Semiconductor Corporation) maintains identical electrical specifications and package configuration. This part differs only in packaging format (Tape & Reel) and product status designation.

Similar Manufacturer Parts: S07G-GS08 and S07G-GS18 (Vishay General Semiconductor - Diodes Division) share the same 400 V reverse voltage rating and DO-219AB package. These parts operate at reduced average rectified current (700 mA versus 1 A) and include automotive-grade qualification (AEC-Q101). Operating temperature range differs at -55°C to 150°C versus -55°C to 175°C for the main part.

Parameter Comparison

Parameter	S1GL RHG (Main)	S1GL (Parametric Equivalent)	S07G-GS08 (Similar)	S07G-GS18 (Similar)
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor	Vishay General Semiconductor
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
Operating Temperature - Junction	-55°C to 175°C	-55°C to 175°C	-55°C to 150°C	-55°C to 150°C
Product Status	Active	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	Standard	Standard	Automotive	Automotive
Qualification	Not specified	Not specified	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

S1GL (Parametric Equivalent): This part maintains complete electrical and mechanical equivalence to the S1GL RHG with identical voltage, current, and thermal specifications. However, the product status designation "Not For New Designs" indicates this part is in mature lifecycle phase. Selection of S1GL is appropriate for legacy system maintenance, repair operations, or inventory replenishment where design continuity is required. The part carries ROHS3 compliance and unlimited moisture sensitivity level identical to the main part.

S07G-GS08 and S07G-GS18 (Similar Alternatives): Both Vishay parts maintain the 400 V reverse voltage rating and DO-219AB package compatibility. These parts are designated Active product status with AEC-Q101 automotive qualification, indicating current manufacturing support and automotive-grade reliability. Selection of these alternatives is appropriate for applications where:

Average rectified current requirement does not exceed 700 mA
Operating junction temperature does not exceed 150°C
Automotive-grade qualification is beneficial or required
Current manufacturing support and availability are priorities

The S07G-GS08 and S07G-GS18 exhibit lower reverse leakage current (10 µA versus 5 µA) and reduced capacitance (4 pF versus 9 pF), which may provide performance advantages in specific circuit topologies.

Frequently Asked Questions (FAQ)

Q: Can S1GL RHG be directly replaced with S1GL?

A: Yes, S1GL provides complete parametric equivalence with identical voltage (400 V), current (1 A), forward voltage (1.1 V @ 1 A), and operating temperature range (-55°C to 175°C). The primary difference is packaging format (Tape & Reel versus bulk) and product lifecycle status. Direct substitution is electrically and mechanically valid.

Q: What is the primary limitation when substituting S07G-GS08 or S07G-GS18?

A: The average rectified current rating is reduced from 1 A to 700 mA. Substitution is valid only for applications where peak and average current demands do not exceed 700 mA. The maximum operating junction temperature is also reduced from 175°C to 150°C. Both parts maintain the 400 V reverse voltage rating and DO-219AB package compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. S1GL, S07G-GS08, and S07G-GS18 are all ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). All parts meet REACH unaffected status and carry EAR99 ECCN classification.

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. S07G-GS08 and S07G-GS18 carry this qualification, indicating compliance with automotive reliability and quality requirements. This qualification is not specified for the S1GL RHG or S1GL parts.

Q: Can reverse recovery time differences affect circuit performance?

A: All substitute parts maintain identical reverse recovery time (trr) of 1.8 µs, which is the critical parameter for switching speed and EMI characteristics. No performance variation occurs in this parameter across all listed alternatives.

Q: How do capacitance differences impact substitution decisions?

A: S1GL RHG and S1GL both exhibit 9 pF capacitance at 4V, 1MHz, while S07G-GS08 and S07G-GS18 exhibit 4 pF. Lower capacitance in the Vishay parts may reduce parasitic effects in high-frequency applications. This difference should be evaluated in circuit-specific applications where capacitive loading is a design constraint.

Q: What inventory considerations apply to these substitutes?

A: S1GL RHG has 945 pieces in stock. S1GL (parametric equivalent) has 30,400 pieces available. S07G-GS08 has 658,490 pieces in stock, and S07G-GS18 has 95,100 pieces available. Vishay alternatives offer significantly higher inventory availability for immediate procurement.

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