KBU810-G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBU810-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 1 kV peak reverse voltage with 8 A average rectified current. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance, repair, and redesign applications. Bridge rectifiers in the KBU package series are standard components for AC-to-DC conversion in industrial and consumer electronics applications. Due to the obsolete status of the KBU810-G, sourcing equivalent alternatives from active manufacturers ensures supply chain continuity and design flexibility.

Substiute Parts

KBU810-G

Comchip TechnologyIn Stock: 1224KBU810-G Datasheet

Current PartRFQ

KBU8M

onsemiIn Stock: 968KBU8M Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KBU810-G is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

• Voltage - Peak Reverse (Max): 1 kV
• Current - Average Rectified (Io): 8 A
• Diode Type: Single Phase
• Technology: Standard
• Current - Reverse Leakage @ Vr: 10 µA @ 1000 V
• Operating Temperature Range: -55°C ~ 150°C (TJ)

Mechanical Matching Criteria:

• Mounting Type: Through Hole
• Package / Case: 4-SIP, KBU
• Supplier Device Package: KBU

The KBU8M manufactured by onsemi meets all specified electrical and mechanical parameters and serves as a direct parametric equivalent. Both components share identical voltage ratings, current ratings, leakage characteristics, temperature operating range, and physical packaging. The primary difference lies in the forward voltage specification point (Vf measured at 8 A for KBU8M versus 4 A for KBU810-G), which does not affect substitution compatibility as both maintain the 1 V maximum specification.

Parameter Comparison

Engineering Selection Recommendations

The KBU8M from onsemi is the primary equivalent substitute for the KBU810-G. Both components are classified as obsolete; however, the KBU8M maintains active inventory availability (913 pieces in stock) compared to the KBU810-G (1193 pieces in stock). Selection between these two parts should prioritize current inventory status and supply chain accessibility.

From a compliance perspective, both components carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, ensuring equivalent regulatory treatment. The KBU8M carries REACH Unaffected status and Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating superior handling and storage characteristics compared to the KBU810-G.

For applications requiring active component sourcing, the KBU8M is the recommended selection due to its current availability status and documented compliance certifications. Direct pin-for-pin and functional replacement is supported by the matching 4-SIP KBU package configuration and identical electrical specifications across all critical parameters.

Frequently Asked Questions (FAQ)

Q: Can the KBU8M directly replace the KBU810-G in existing circuit designs?

A: Yes. The KBU8M provides direct functional and pin-for-pin replacement. Both components share identical voltage ratings (1 kV), current ratings (8 A), leakage characteristics (10 µA @ 1000 V), temperature operating range (-55°C ~ 150°C), and physical packaging (4-SIP KBU). No circuit modifications are required.

Q: What is the significance of the different forward voltage test points (Vf @ 4 A versus Vf @ 8 A)?

A: Both components specify a maximum forward voltage of 1 V, with the KBU810-G measured at 4 A and the KBU8M measured at 8 A. This difference reflects manufacturer test methodology and does not affect substitution compatibility. The maximum specification of 1 V is maintained in both cases, ensuring equivalent performance in rectification applications.

Q: Are there any package or mounting differences between these components?

A: No. Both the KBU810-G and KBU8M utilize identical 4-SIP KBU package configuration with through-hole mounting. PCB layout and mechanical integration remain unchanged during substitution.

Q: Why are both the KBU810-G and KBU8M classified as obsolete?

A: Obsolete status indicates that these components are no longer in active production by their respective manufacturers. This classification is common for standard bridge rectifier designs as technology evolves and product lines are consolidated. Obsolete status does not affect functional performance or substitution compatibility; it reflects manufacturing lifecycle status.

Q: What compliance certifications apply to the KBU8M substitute?

A: The KBU8M carries ECCN EAR99 classification (identical to KBU810-G), REACH Unaffected status, and Moisture Sensitivity Level (MSL) 1 (Unlimited). These certifications ensure equivalent regulatory treatment and superior handling characteristics for storage and transportation.

Q: How should inventory availability influence the selection between KBU810-G and KBU8M?

A: Current inventory status should be the primary selection criterion for immediate procurement needs. The KBU8M currently maintains 913 pieces in stock, while the KBU810-G maintains 1193 pieces. For long-term supply chain planning, the KBU8M is recommended due to its active manufacturer status and documented compliance certifications.