KBL408G Bridge Rectifier Single Phase 800V 4A Equivalent & Substitute Parts

Part Overview

The KBL408G is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, designed for applications requiring 800V peak reverse voltage with 4A average rectified current capacity. This component operates across an extended temperature range of -50°C to 150°C and is housed in a 4-SIP KBL through-hole package. The part maintains Active product status and carries RoHS Compliance certification.

Substitute parts are identified when electrical specifications, mechanical packaging, and operational parameters align within the defined tolerance envelope for this product category. Equivalent components enable design flexibility, supply chain continuity, and procurement optimization without compromising circuit performance.

Substiute Parts

KBL408G

GeneSiC SemiconductorIn Stock: 759KBL408G Datasheet

Current PartRFQ

KBL08-E4/51

Vishay General Semiconductor - Diodes DivisionIn Stock: 2915KBL08-E4/51 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KBL408G is determined by strict parametric alignment across the following critical specifications:

Electrical Parameters (Must Match Exactly):

• Voltage - Peak Reverse (Max): 800 V
• Current - Average Rectified (Io): 4 A
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 4 A
• Current - Reverse Leakage @ Vr: 5 µA @ 800 V

Mechanical & Operational Parameters (Must Match Exactly):

• Diode Type: Single Phase
• Technology: Standard
• Operating Temperature Range: -50°C to 150°C (TJ)
• Mounting Type: Through Hole
• Package / Case: 4-SIP, KBL

Compliance & Status:

• Product Status: Active
• RoHS Compliance: Required

The KBL08-E4/51 manufactured by Vishay General Semiconductor - Diodes Division satisfies all substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

KBL408G (GeneSiC Semiconductor)

Primary selection when GeneSiC supply chain availability is confirmed. Maintains Active product status with RoHS Compliance certification. Suitable for applications where GeneSiC device qualification is specified or preferred.

KBL08-E4/51 (Vishay General Semiconductor - Diodes Division)

Direct parametric equivalent with identical electrical and mechanical specifications. Carries Active product status with ROHS3 Compliance certification, representing an enhanced compliance level. Inventory availability of 2835 units supports high-volume procurement requirements. Suitable for applications where Vishay device qualification is specified or where supply continuity is prioritized.

Both components satisfy identical functional requirements and are interchangeable within the defined electrical and mechanical parameter envelope. Selection between these parts is determined by supply availability, procurement policy, and device qualification requirements specific to the end application.

Frequently Asked Questions (FAQ)

Q: What determines whether KBL08-E4/51 can substitute for KBL408G?

A: Substitution is valid when all electrical parameters (voltage, current, forward voltage drop, reverse leakage), operating temperature range, mounting type, package configuration, and product status are identical. The KBL08-E4/51 meets all these criteria.

Q: Are there differences in RoHS compliance between these parts?

A: KBL408G carries RoHS Compliance certification, while KBL08-E4/51 carries ROHS3 Compliance certification. ROHS3 represents an updated compliance standard. Both are acceptable for applications requiring RoHS compliance.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Both components use identical 4-SIP KBL through-hole packaging and share identical pin configurations. No PCB layout modifications are required for substitution.

Q: What is the significance of the 800V peak reverse voltage rating?

A: This rating defines the maximum reverse voltage the bridge rectifier can withstand without breakdown. Both parts are rated identically at 800V, ensuring equivalent performance in rectification circuits operating at this voltage level.

Q: How do forward voltage drops compare between these parts?

A: Both parts specify identical maximum forward voltage of 1.1V at 4A rectified current. This ensures equivalent power dissipation and thermal performance in circuit applications.

Q: What does the 5 µA reverse leakage current specification indicate?

A: Reverse leakage current measured at 800V peak reverse voltage is identical for both parts at 5 µA. This parameter indicates the quality of the rectifier junction and affects standby power consumption in DC applications.

Q: Are temperature operating ranges identical?

A: Yes. Both KBL408G and KBL08-E4/51 operate across -50°C to 150°C junction temperature range, ensuring equivalent thermal performance across industrial and commercial temperature environments.

Q: What packaging considerations apply to these through-hole components?

A: Both parts use 4-SIP KBL through-hole packages with identical lead configurations. Standard PCB through-hole soldering processes apply without modification. No special handling or thermal management differences exist between the two parts.