S1G-AQ Equivalent & Substitute Parts

Part Overview

The S1G-AQ 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 DO-214AC (SMA) package. This component is classified as Active and complies with ROHS3 and REACH standards. Substitute parts are identified based on matching electrical specifications, package compatibility, and operational temperature ranges to ensure functional equivalence in circuit applications.

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	V @ 1 A
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Operating Temperature - Junction	-50 to 150	°C
Package / Case	DO-214AC, SMA	-
Mounting Type	Surface Mount	-
Technology	Standard	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the S1G-AQ are identified through parametric equivalence across critical electrical and mechanical specifications. The substitution logic is based on the following matching criteria:

Primary Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
Package / Case: DO-214AC or SMA equivalent
Mounting Type: Surface Mount
Technology: Standard
RoHS Status: ROHS3 Compliant

Parts meeting all primary parameters are classified as parametric equivalents and are suitable for direct substitution in applications where the S1G-AQ is specified.

Parameter Comparison

Parameter	S1G-AQ (Main Part)	S1G (Substitute)	M4 (Substitute)
Manufacturer	Diotec Semiconductor	Diotec Semiconductor	MDD
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V
Current - Average Rectified (Io)	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
Reverse Recovery Time (trr)	1.5 µs	1.5 µs	Not Specified
Current - Reverse Leakage @ Vr	5 µA @ 400 V	1 µA @ 400 V	Not Specified
Operating Temperature - Junction	-50 to 150 °C	-50 to 150 °C	-55 to 150 °C
Package / Case	DO-214AC, SMA	DO-214AC, SMA	SOD-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Technology	Standard	Standard	Standard
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

S1G (Diotec Semiconductor): This substitute part is manufactured by the same supplier as the main part and maintains identical electrical specifications including reverse recovery time and operating temperature range. Both parts carry ROHS3 compliance and REACH Unaffected status. The S1G is available in Tape & Reel (TR) packaging and represents a direct functional equivalent with 29,439 units in stock.

M4 (MDD): This substitute part meets all primary electrical parameters including 400 V reverse voltage, 1 A average rectified current, and 1.1 V forward voltage. The M4 operates across an extended temperature range (-55 to 150 °C) compared to the S1G-AQ (-50 to 150 °C), providing additional thermal margin. Both parts maintain ROHS3 compliance and REACH Unaffected status. The M4 is available in high inventory (600,723 units) and is classified as Active. Package designation is SOD-214AC, SMA, which is mechanically and electrically compatible with DO-214AC, SMA applications.

Frequently Asked Questions (FAQ)

Q: Can the S1G be used as a direct replacement for the S1G-AQ?

A: Yes. The S1G is a parametric equivalent manufactured by Diotec Semiconductor with identical electrical specifications, including 400 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage, 1.5 µs reverse recovery time, and -50 to 150 °C operating temperature range. Both parts use DO-214AC (SMA) packaging and are ROHS3 compliant.

Q: What are the differences between the S1G-AQ and M4?

A: The primary differences are manufacturer (Diotec Semiconductor versus MDD) and reverse leakage current specification (5 µA versus not specified for M4). The M4 operates across a wider temperature range (-55 to 150 °C versus -50 to 150 °C). Both parts meet the core electrical requirements of 400 V, 1 A, and 1.1 V forward voltage. Package designations are DO-214AC, SMA for S1G-AQ and SOD-214AC, SMA for M4, which are mechanically compatible.

Q: Are the package designations DO-214AC and SOD-214AC interchangeable?

A: DO-214AC and SOD-214AC refer to the same physical package form factor (SMA). Both designations describe a Surface Mount diode package with identical mechanical dimensions and PCB footprint compatibility.

Q: What is the significance of the reverse recovery time specification?

A: Reverse recovery time (trr) of 1.5 µs indicates the time required for the diode to transition from forward conduction to reverse blocking. This parameter is specified for the S1G-AQ and S1G but not provided for the M4. For applications where switching speed is critical, the S1G-AQ or S1G are preferred.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The S1G-AQ, S1G, and M4 are all ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Which substitute part has the lowest reverse leakage current?

A: The S1G specifies 1 µA @ 400 V reverse leakage current, which is lower than the S1G-AQ specification of 5 µA @ 400 V. The M4 does not provide reverse leakage current specification in the available data.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message