HERAF805G C0G Equivalent & Substitute Parts

Part Overview

The HERAF805G C0G is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 8 A average rectified current in a through-hole TO-220-2 package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. The part operates across a junction temperature range of -55°C to 150°C and features fast recovery characteristics with a 50 ns reverse recovery time.

Substiute Parts

HERAF805G C0G

Taiwan Semiconductor CorporationIn Stock: 1072HERAF805G C0G Datasheet

Current PartRFQ

HERAF805G

Taiwan Semiconductor CorporationIn Stock: 2096HERAF805G Datasheet

DirectRFQ

SFAF806G

Taiwan Semiconductor CorporationIn Stock: 10461SFAF806G Datasheet

Parametric EquivalentRFQ

SFAF806GHC0G

Taiwan Semiconductor CorporationIn Stock: 949SFAF806GHC0G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HERAF805G C0G is determined by equivalence in the following critical electrical and mechanical parameters:

• Voltage Rating: 400 V DC reverse voltage (Vr)
• Current Rating: 8 A average rectified current (Io)
• Forward Voltage: 1.3 V maximum at 8 A
• Reverse Leakage: 10 µA at 400 V
• Package: TO-220-2 through-hole configuration
• Mounting: Through-hole technology
• Temperature Range: -55°C to 150°C junction operating range

Substitute parts are grouped into two categories: direct equivalents matching all specified parameters, and parametric equivalents that maintain functional compatibility within the defined electrical envelope while offering improved performance characteristics in secondary parameters such as reverse recovery time and junction capacitance.

Parameter Comparison

Engineering Selection Recommendations

HERAF805G (Direct Equivalent)

The HERAF805G in tube packaging is a direct functional equivalent to the HERAF805G C0G. This part maintains identical electrical specifications across all primary parameters including voltage rating, current capacity, forward voltage, and reverse leakage characteristics. The primary distinction is product status: HERAF805G is currently active in inventory with 2022 units available, whereas the main part number is discontinued. This substitute is suitable for direct replacement in applications where the original specification is required without modification.

SFAF806G (Parametric Equivalent)

The SFAF806G is a parametric equivalent offering improved performance in secondary characteristics. This part maintains the same voltage rating (400 V), current rating (8 A), forward voltage (1.3 V @ 8 A), and reverse leakage (10 µA @ 400 V). The SFAF806G features a reduced reverse recovery time of 35 ns compared to 50 ns in the main part, and lower junction capacitance of 60 pF versus 80 pF. These improvements result in faster switching performance and reduced capacitive effects. The part is active with 10399 units in inventory. This substitute is applicable in applications where faster recovery characteristics provide system-level benefits.

SFAF806GHC0G (Parametric Equivalent with Automotive Qualification)

The SFAF806GHC0G is a parametric equivalent with automotive-grade qualification to AEC-Q101 standard. This part shares the same electrical specifications as SFAF806G, including the improved 35 ns reverse recovery time and 60 pF capacitance. The addition of automotive qualification makes this part suitable for applications requiring automotive-grade component certification. The part is active with 926 units in inventory. Selection of this part is appropriate for automotive applications or systems requiring AEC-Q101 compliance.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and the same operating temperature range of -55°C to 150°C.

Frequently Asked Questions (FAQ)

Q: Can HERAF805G be directly replaced with SFAF806G?

A: Yes. Both parts share identical primary electrical specifications: 400 V reverse voltage, 8 A average rectified current, 1.3 V forward voltage at 8 A, and 10 µA reverse leakage at 400 V. The SFAF806G offers improved reverse recovery time (35 ns versus 50 ns) and lower capacitance (60 pF versus 80 pF), making it functionally compatible for direct substitution. The TO-220-2 package and through-hole mounting are identical.

Q: What is the difference between SFAF806G and SFAF806GHC0G?

A: Both parts are electrically identical with 35 ns reverse recovery time and 60 pF capacitance. The SFAF806GHC0G carries automotive-grade qualification to AEC-Q101 standard, making it suitable for automotive applications. Selection between these parts depends on whether automotive qualification is required for the application.

Q: Is the HERAF805G (tube packaging) equivalent to HERAF805G C0G?

A: Yes. These parts are electrically and mechanically identical. The difference is packaging format: the main part number HERAF805G C0G is discontinued, while HERAF805G in tube packaging is currently active. Both maintain the same electrical specifications and TO-220-2 package configuration.

Q: Can these diodes be used in high-frequency switching applications?

A: The SFAF806G and SFAF806GHC0G are better suited for high-frequency applications due to their 35 ns reverse recovery time compared to the 50 ns of HERAF805G. The reduced reverse recovery time results in faster switching performance and lower switching losses.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed—HERAF805G, SFAF806G, and SFAF806GHC0G—are ROHS3 compliant and REACH unaffected.

Q: What is the inventory status of each substitute part?

A: HERAF805G (tube) has 2022 units in stock. SFAF806G has 10399 units in stock. SFAF806GHC0G has 926 units in stock. All parts are currently active and available for procurement.

Q: Do these parts operate across the same temperature range?

A: Yes. All substitute parts operate across the identical junction temperature range of -55°C to 150°C.