S1GLH Equivalent & Substitute Parts

Part Overview

The S1GLH 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 (DO-219AB). This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identification of equivalent and substitute parts is necessary for ongoing support of legacy designs, inventory management, and sourcing optimization where alternative packaging or product status may be preferred.

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

Substitute Part Grouping Explanation

Substitution of the S1GLH is determined by strict equivalence across the following critical parameters:

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
Operating Temperature - Junction: -55°C to 175°C
Technology: Standard

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Base Product Number: S1G

Compliance Parameters (Must Match):

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Manufacturer Recommended Substitute (Different Package)

S1GLWH: Functionally equivalent but in SOD-123W package instead of Sub SMA. Product status is Active, providing long-term availability.

Category 2: Parametric Equivalents (Same Package, Different Variants)

S1GL, S1GL M2G, S1GL MHG, S1GL MTG, S1GL RFG, S1GL RHG, S1GL RQG, S1GL RTG, S1GL RUG: All maintain identical electrical and mechanical specifications in DO-219AB Sub SMA package. These represent manufacturing variants or date codes with Active product status.

Parameter Comparison

Parameter	S1GLH	S1GLWH	S1GL	S1GL M2G	S1GL MHG	S1GL MTG	S1GL RFG	S1GL RHG	S1GL RQG	S1GL RTG	S1GL RUG
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V	400 V	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A	1 A	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	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	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)	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)	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	1.8 µs	Not specified	1.8 µs	1.8 µs	1.8 µs	1.8 µs	1.8 µs	1.8 µs	1.8 µs	1.8 µs	1.8 µs
Current - Reverse Leakage @ Vr	5 µA @ 400 V	1 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Operating Temperature - Junction	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C
Package / Case	DO-219AB (Sub SMA)	SOD-123W	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)	DO-219AB (Sub SMA)
Product Status	Not For New Designs	Active	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Package):

Select from the parametric equivalent variants (S1GL, S1GL M2G, S1GL MHG, S1GL MTG, S1GL RFG, S1GL RHG, S1GL RQG, S1GL RTG, S1GL RUG) when maintaining the DO-219AB Sub SMA package footprint is required. These parts provide identical electrical performance and are available with Active product status, ensuring continued supply. The S1GL RUG variant is available in Tape & Reel packaging, matching the original S1GLH packaging format.

For Package Migration:

Select S1GLWH when transitioning to SOD-123W package is acceptable. This part is the manufacturer-recommended substitute and carries Active product status. The SOD-123W package is a standard industry format with broader component availability. Reverse leakage current is improved at 1 µA compared to 5 µA in the S1GLH, representing enhanced performance. PCB layout and thermal management characteristics differ due to package geometry and must be evaluated for the specific application.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes. All parts are manufactured by Taiwan Semiconductor Corporation under the same base product number (S1G), confirming design lineage and quality consistency.

Frequently Asked Questions (FAQ)

Q: Can S1GLWH be used as a direct replacement for S1GLH on the same PCB?

A: No. S1GLWH uses SOD-123W package while S1GLH uses DO-219AB Sub SMA package. These packages have different footprints, lead spacing, and thermal characteristics. PCB layout modification is required. However, electrical performance is equivalent.

Q: What is the difference between S1GL and S1GL RUG?

A: Both parts are electrically and mechanically identical with DO-219AB Sub SMA packaging. The primary difference is packaging format: S1GL RUG is supplied in Tape & Reel (TR), while S1GL packaging format is not specified. For high-volume production requiring automated assembly, S1GL RUG is the appropriate selection.

Q: Why is S1GLH marked "Not For New Designs"?

A: This designation indicates the part has been superseded in the manufacturer's active product line. Existing inventory remains available for legacy design support, but new designs should utilize Active status alternatives such as S1GL M2G, S1GL MHG, S1GL MTG, S1GL RFG, S1GL RHG, S1GL RQG, S1GL RTG, or S1GL RUG for long-term availability assurance.

Q: Are all substitute parts AEC-Q101 qualified?

A: The S1GLH carries AEC-Q101 automotive qualification. This specification is not provided for the substitute parts in the available data. Verification of automotive qualification status with the manufacturer is required if AEC-Q101 compliance is mandatory for the application.

Q: What is the inventory status of substitute parts?

A: S1GLWH has 29,532 pieces in stock. S1GL variants range from 807 to 976 pieces in stock. S1GL RUG has 976 pieces available in Tape & Reel format. Current inventory levels support both legacy design support and new production requirements.

Q: Can S1GL variants be used interchangeably?

A: Yes. All S1GL variants (M2G, MHG, MTG, RFG, RHG, RQG, RTG, RUG) are parametrically equivalent with identical electrical specifications, operating temperature range, and DO-219AB Sub SMA packaging. Selection between variants is based on packaging format (Tape & Reel vs. bulk) and availability requirements.

Q: Is reverse recovery time critical for substitution?

A: Reverse recovery time (trr) is specified at 1.8 µs for S1GLH and all DO-219AB Sub SMA variants. S1GLWH does not specify this parameter. If reverse recovery time is a critical circuit parameter, maintain selection within the DO-219AB Sub SMA family or obtain trr specification for S1GLWH from the manufacturer.

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