HERA804G C0G Equivalent & Substitute Parts

Part Overview

The HERA804G C0G is a general-purpose rectifier diode rated for 300 V DC reverse voltage and 8 A average rectified current in a through-hole TO-220AC package. This component is classified as discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity. The part operates across a junction temperature range of -55°C to 150°C and features fast recovery characteristics with a reverse recovery time of 50 ns, suitable for standard rectification applications requiring moderate voltage and current ratings.

Substiute Parts

HERA804G C0G

Taiwan Semiconductor CorporationIn Stock: 866HERA804G C0G Datasheet

Current PartRFQ

HERA804G

Taiwan Semiconductor CorporationIn Stock: 1820HERA804G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HERA804G C0G is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 300 V
• Current - Average Rectified (Io): 8 A
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 8 A
• Reverse Recovery Time (trr): 50 ns
• Current - Reverse Leakage @ Vr: 10 µA @ 300 V
• Capacitance @ Vr, F: 65 pF @ 4V, 1MHz
• Technology: Standard
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Parameters (Must Match):

• Package / Case: TO-220-2
• Mounting Type: Through Hole
• Supplier Device Package: TO-220AC

Environmental & Compliance Parameters (Must Match):

• Operating Temperature - Junction: -55°C to 150°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

Substitute parts must satisfy all parameters listed above to ensure functional and mechanical compatibility within the original application circuit.

Parameter Comparison

Engineering Selection Recommendations

The HERA804G (Tube packaging) serves as a direct substitute for the HERA804G C0G. Both parts are manufactured by Taiwan Semiconductor Corporation and share identical electrical specifications, mechanical dimensions, and environmental ratings. The primary distinction is product status: the main part is discontinued at DiGi Electronics, while the substitute remains in active production status with confirmed inventory availability of 1755 pieces.

Selection of the HERA804G substitute is supported by:

• Full electrical parameter equivalence across all voltage, current, and transient characteristics
• Identical TO-220-2 package and through-hole mounting configuration
• Matching operating temperature range (-55°C to 150°C)
• Equivalent RoHS3 compliance and REACH unaffected status
• Moisture sensitivity level MSL 1 (Unlimited) for standard handling and storage
• Active product status ensuring continued availability and supply chain stability

The substitute part is suitable for direct replacement in applications originally designed for the HERA804G C0G without circuit modification or thermal redesign.

Frequently Asked Questions (FAQ)

Q: Can the HERA804G substitute be used as a direct replacement for the HERA804G C0G?

A: Yes. Both parts are electrically and mechanically identical. All critical parameters including reverse voltage rating (300 V), average rectified current (8 A), forward voltage drop (1 V @ 8 A), reverse recovery time (50 ns), and package configuration (TO-220-2 through-hole) are equivalent. The substitute is suitable for direct board-level replacement without circuit modification.

Q: What is the difference between the main part and the substitute?

A: The HERA804G C0G is discontinued at DiGi Electronics, while the HERA804G remains in active production. The substitute offers the same electrical and mechanical specifications with improved supply chain availability. Packaging differs (the substitute is supplied in Tube format), but this does not affect component performance or compatibility.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate across the same junction temperature range (-55°C to 150°C) and exhibit identical thermal and electrical characteristics. Forward voltage drop, reverse leakage current, capacitance, and reverse recovery time are specified identically.

Q: Does the packaging format (Tube vs. other formats) affect compatibility?

A: Packaging format affects handling, storage, and procurement logistics but does not affect electrical performance or board-level compatibility. The TO-220-2 package and through-hole mounting configuration remain unchanged. Component leads and pinout are identical.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the HERA804G C0G and HERA804G are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is MSL 1 (Unlimited) for both parts, indicating standard handling and storage requirements with no special moisture control measures required.

Q: What is the reverse recovery time specification, and why is it important?

A: Reverse recovery time (trr) is specified at 50 ns for both parts. This parameter defines the time required for the diode to transition from forward conduction to reverse blocking state. The 50 ns specification classifies both parts as fast recovery diodes, suitable for applications requiring rapid switching transitions and reduced switching losses.

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

A: Both parts are classified as fast recovery diodes with trr ≤ 500 ns and are suitable for applications with switching frequencies up to the limits defined by the 50 ns reverse recovery time. Specific frequency suitability depends on circuit design and thermal management; the provided specifications define the component characteristics only.