SDURB830 Equivalent & Substitute Parts

Part Overview

The SDURB830 is a general-purpose rectifier diode manufactured by SMC Diode Solutions, rated for 300 V DC reverse voltage and 8 A average rectified current. The device is packaged in a surface mount D2PAK (TO-263-3) configuration with fast recovery characteristics. This diode is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameters. Alternative sources provide equivalent functionality for applications requiring component availability, supply chain flexibility, or specific manufacturer certifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 8 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	45	ns
Current - Reverse Leakage @ Vr	10	µA @ 300 V
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SDURB830 are qualified based on the following electrical and mechanical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 300 V
Current - Average Rectified (Io): 8 A
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount
Technology: Standard rectifier diode

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: 1.25 V to 1.3 V @ 8 A
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): 35 ns to 45 ns
Current - Reverse Leakage @ Vr: 10 µA to 20 µA @ 300 V
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain the core electrical ratings and physical package specifications required for direct functional replacement in applications designed for the SDURB830.

Parameter Comparison

Parameter	SDURB830 (SMC)	STTH803G-TR (STMicroelectronics)	SFAS805G (Taiwan Semiconductor)	SFAS805GH (Taiwan Semiconductor)
Voltage - DC Reverse (Vr) (Max)	300 V	300 V	300 V	300 V
Current - Average Rectified (Io)	8 A	8 A	8 A	8 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A	1.25 V @ 8 A	1.3 V @ 8 A	1.3 V @ 8 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	45 ns	35 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	10 µA @ 300 V	20 µA @ 300 V	10 µA @ 300 V	10 µA @ 300 V
Capacitance @ Vr, F	-	-	60 pF @ 4V, 1MHz	60 pF @ 4V, 1MHz
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Operating Temperature - Junction	-55 to 150°C	175°C (Max)	-55 to 150°C	-55 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Grade / Qualification	Standard	Standard	Standard	Automotive / AEC-Q101

Engineering Selection Recommendations

STTH803G-TR (STMicroelectronics): This substitute maintains all critical electrical parameters with improved reverse recovery time (35 ns versus 45 ns). The forward voltage is marginally lower at 1.25 V compared to 1.3 V. The maximum junction temperature rating of 175°C exceeds the SDURB830 specification. Reverse leakage current is specified at 20 µA, which is within acceptable tolerance for general-purpose rectifier applications. RoHS3 compliance and MSL 1 rating are maintained. This part is suitable for applications where faster switching characteristics are beneficial.

SFAS805G (Taiwan Semiconductor Corporation): This parametric equivalent maintains identical forward voltage (1.3 V @ 8 A) and reverse leakage current (10 µA @ 300 V) specifications to the SDURB830. Reverse recovery time is improved at 35 ns. Capacitance specification is provided at 60 pF @ 4V, 1MHz. Operating temperature range matches the SDURB830 at -55°C to 150°C. RoHS3 compliance and MSL 1 rating are maintained. This part provides direct electrical equivalence with additional parametric documentation.

SFAS805GH (Taiwan Semiconductor Corporation): This variant is qualified to automotive standards with AEC-Q101 certification. Electrical parameters are identical to SFAS805G. The automotive-grade qualification provides additional process control and reliability documentation suitable for applications requiring automotive component traceability. Operating temperature range, RoHS3 compliance, and MSL 1 rating are maintained. This part is specified for applications requiring automotive-grade component certification.

Frequently Asked Questions (FAQ)

Q: Can STTH803G-TR be used as a direct replacement for SDURB830?

A: Yes. Both devices share identical voltage (300 V) and current (8 A) ratings, fast recovery speed classification, and D2PAK surface mount packaging. The STTH803G-TR exhibits faster reverse recovery time (35 ns versus 45 ns) and lower forward voltage (1.25 V versus 1.3 V), making it functionally compatible for direct substitution in applications designed for the SDURB830.

Q: What is the difference between SFAS805G and SFAS805GH?

A: Both parts are electrically identical with 300 V reverse voltage, 8 A current rating, and D2PAK packaging. The SFAS805GH includes automotive-grade qualification with AEC-Q101 certification, making it suitable for applications requiring automotive component standards. The SFAS805G is the standard industrial version without automotive qualification.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use the TO-263-3 D2PAK (2 Leads + Tab) surface mount package. However, packaging format differs: SDURB830 and SFAS805G/SFAS805GH are supplied in Tape & Reel (TR), while STTH803G-TR is supplied in Cut Tape (CT) & Digi-Reel format. Both formats are compatible with standard surface mount assembly equipment.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. SDURB830, STTH803G-TR, SFAS805G, and SFAS805GH are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, meeting environmental and regulatory requirements for industrial and commercial applications.

Q: Which substitute part has the fastest reverse recovery time?

A: Both STTH803G-TR and SFAS805G/SFAS805GH specify reverse recovery time at 35 ns, compared to 45 ns for the SDURB830. The faster recovery time reduces switching losses and improves efficiency in high-frequency rectification applications.

Q: What is the maximum operating temperature for each part?

A: SDURB830, SFAS805G, and SFAS805GH are rated to 150°C maximum junction temperature. STTH803G-TR has a higher maximum junction temperature of 175°C, providing additional thermal margin in high-temperature operating environments.

Q: Are substitute parts suitable for automotive applications?

A: SFAS805GH is specifically qualified for automotive applications with AEC-Q101 certification. SDURB830, STTH803G-TR, and SFAS805G are standard industrial-grade components without automotive qualification. Application requirements determine whether automotive-grade certification is necessary.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message