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Home > Products > Discrete Semiconductor Products > Diodes > Bridge Rectifiers

Taiwan Semiconductor Corporation KBL407G

Name: KBL407G
Brand: Taiwan Semiconductor Corporation
SKU: KBL407G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KBL407G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Bridge Rectifiers

Package:: 4-SIP, KBL

Datasheet:: KBL407G.pdf

Description:: BRIDGE RECT 1PHASE 1KV 4A KBL

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Product details

Overview

KBL407G from Taiwan Semiconductor is a 4A, 1000V repetitive peak reverse voltage (V_RRM) standard single-phase bridge rectifier in KBL package, featuring glass-passivated junctions, UL Recognized (E-326243), RoHS-compliant construction, and rated for 150A non-repetitive surge current - used in high-voltage AC/DC front-end stages of industrial SMPS and lighting ballasts.

For engineers reviewing the KBL407G datasheet, KBL407G pinout, KBL407G application, or KBL407G equivalent, key selection criteria include verified V_RRM = 1000V, I_F = 4A continuous, I_FSM = 150A, R_θJL = 2.4°C/W, and KBL package thermal/mechanical compliance with J-STD-002 solderability and JESD201 Class 1A whisker resistance.

Technical Context

The KBL407G integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals, enabling direct AC-to-DC conversion without external interconnection. Its glass-passivated chip junction ensures stable reverse leakage (<500 µA at 125°C) and robust surge immunity under 8.3ms half-sine stress.

Thermally, it delivers R_θJL = 2.4°C/W to lead and R_θJA = 19°C/W to ambient, supporting PCB-mount operation up to T_J = 150°C. The KBL molded plastic case meets UL 94V-0 and weighs 5.60g, with matte tin-plated leads compliant to J-STD-002.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - maximum repetitive reverse voltage per diode; defines safe AC input handling up to ~707 V_RMS
I_F	4 A - average forward rectified current at T_C = 75°C; determines continuous DC output capability
I_FSM	150 A - peak non-repetitive surge current (8.3 ms); supports inrush and transient overload tolerance
V_F @ 4A	1.1 V max - forward voltage drop at full rated current; directly impacts conduction loss and thermal design
R_θJL	2.4 °C/W - junction-to-lead thermal resistance; enables direct heatsinking via PCB copper or clip-on heatsink
T_J max	150 °C - maximum allowable junction temperature; sets upper limit for thermal management margin
I²t	93 A²s - fusing rating for t < 8.3 ms; used for fuse coordination and short-circuit withstand analysis

Pinout & Package

Package: KBL - 4-terminal molded plastic body (19.5 × 15.2 × 16.3 mm), UL 94V-0 rated, matte tin-plated leads, polarity marked on top surface.

Pin/Terminal	Circuit Role	Design Meaning
AC1	AC input terminal 1	One leg of AC input; connects to line or neutral side of transformer secondary
AC2	AC input terminal 2	Second leg of AC input; completes full-wave bridge AC path
+ (Anode Common)	Positive DC output	Full-wave rectified positive output node; connects to bulk capacitor or PFC stage input
– (Cathode Common)	Negative DC output	Full-wave rectified negative/return node; system ground reference point for downstream converters

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable IR ≤ 500 µA at 125°C and long-term reliability under humid/harsh environments
UL Recognized (E-326243)	Validates safety compliance for end-equipment certification in industrial and commercial power supplies
J-STD-002 solderable leads	Guarantees consistent wetting and joint integrity during reflow or wave soldering processes
JESD201 Class 1A whisker resistance	Prevents tin whisker growth under thermal cycling, critical for automotive-adjacent and long-life deployments
UL 94V-0 molding compound	Ensures flame retardancy in enclosed power enclosures and prevents fire propagation risk

Applications

Industrial Switch-Mode Power Supplies	LED Driver Ballasts
Use Scenario: High-efficiency 100–500W offline SMPS for PLCs, motor drives, and factory automation controllers. IC Role / Device Role / Timing Role: Primary-side AC/DC bridge rectifier converting 230VAC mains to unregulated DC bus prior to PFC and DC/DC stages. Use Value: 1000V V_RRM provides 2× safety margin over 230VAC + line surges; 150A I_FSM handles cold-start inrush into large bulk capacitors.	Use Scenario: Constant-current LED drivers for street lighting and high-bay industrial fixtures operating from 277VAC or 347VAC utility lines. IC Role / Device Role / Timing Role: Input-stage bridge rectifier feeding isolated flyback or buck-boost topology with wide input voltage range. Use Value: Glass passivation maintains low IR drift across 125°C ambient; KBL package allows direct mounting to metal-core PCB for passive thermal management.
Universal Input Adapters	AC-DC Auxiliary Power Supplies
Use Scenario: Multi-range 90–264VAC input adapters for telecom and networking equipment requiring global compatibility. IC Role / Device Role / Timing Role: Front-end rectification stage delivering stable DC bus to primary controller IC and bias windings. Use Value: 4A I_F supports >60W output with margin; R_θJL = 2.4°C/W enables thermal coupling to chassis without active cooling.	Use Scenario: Standby and auxiliary power supplies in UPS, server PSUs, and industrial HMIs where reliability and space constraints coexist. IC Role / Device Role / Timing Role: Compact, self-contained bridge rectifier providing isolated low-power DC rails for microcontrollers and sensors. Use Value: UL Recognition simplifies end-product safety approvals; RoHS compliance meets global environmental mandates without redesign.

Industrial Switch-Mode Power Supplies

LED Driver Ballasts

Use Scenario: High-efficiency 100–500W offline SMPS for PLCs, motor drives, and factory automation controllers.

IC Role / Device Role / Timing Role: Primary-side AC/DC bridge rectifier converting 230VAC mains to unregulated DC bus prior to PFC and DC/DC stages.

Use Value: 1000V V_RRM provides 2× safety margin over 230VAC + line surges; 150A I_FSM handles cold-start inrush into large bulk capacitors.

Use Scenario: Constant-current LED drivers for street lighting and high-bay industrial fixtures operating from 277VAC or 347VAC utility lines.

IC Role / Device Role / Timing Role: Input-stage bridge rectifier feeding isolated flyback or buck-boost topology with wide input voltage range.

Use Value: Glass passivation maintains low IR drift across 125°C ambient; KBL package allows direct mounting to metal-core PCB for passive thermal management.

Universal Input Adapters

AC-DC Auxiliary Power Supplies

Use Scenario: Multi-range 90–264VAC input adapters for telecom and networking equipment requiring global compatibility.

IC Role / Device Role / Timing Role: Front-end rectification stage delivering stable DC bus to primary controller IC and bias windings.

Use Value: 4A I_F supports >60W output with margin; R_θJL = 2.4°C/W enables thermal coupling to chassis without active cooling.

Use Scenario: Standby and auxiliary power supplies in UPS, server PSUs, and industrial HMIs where reliability and space constraints coexist.

IC Role / Device Role / Timing Role: Compact, self-contained bridge rectifier providing isolated low-power DC rails for microcontrollers and sensors.

Use Value: UL Recognition simplifies end-product safety approvals; RoHS compliance meets global environmental mandates without redesign.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bridge rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GBU10K	V_RRM = 1000V, I_F = 10A, GBU package (larger, higher thermal mass), R_θJA = 15°C/W	Better thermal performance but requires larger PCB footprint; suited for higher-power or lower-ambient designs	Select GBU10K when board space permits and I_F margin >2× required; KBL407G preferred for compact, cost-sensitive layouts.
DB107S	V_RRM = 1000V, I_F = 1A, SMD DO-214AA package, R_θJA = 50°C/W	Lower current rating and significantly higher thermal resistance; limited to <15W applications	DB107S is not a functional replacement for KBL407G in 4A designs; only consider if load current is ≤1A and space is extremely constrained.

Compared with GBU10K and DB107S, the KBL407G uniquely balances 4A capacity, 1000V rating, and compact KBL footprint with proven manufacturability - making it optimal for mid-power industrial and lighting applications where size, cost, and UL compliance are jointly prioritized.

Availability

KBL407G is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, LED driver ballasts, and universal-input adapters requiring stable component supply, long-lifecycle support, and UL-recognized reliability.

Supply support for KBL407G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The KBL407G belongs to TSC's standard bridge rectifier product line, engineered for high-voltage AC/DC conversion in cost-sensitive, high-volume power supply applications with emphasis on safety certification, thermal robustness, and assembly compatibility.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the KBL407G?

The KBL407G has a V_RRM rating of 1000 V, as explicitly specified in the Absolute Maximum Ratings table for the KBL407G variant. This value is confirmed across all official Taiwan Semiconductor documentation versions (J2308) and distinguishes it from lower-voltage variants like KBL406G (800 V) and KBL405G (600 V).

Does the KBL407G meet UL safety recognition requirements?

Yes, the KBL407G is UL Recognized under File # E-326243, as stated in the FEATURES section of the official Taiwan Semiconductor datasheet. This applies to the entire KBL401G–KBL407G family, including KBL407G, and supports end-equipment safety certification for industrial and commercial power applications.

What is the forward voltage drop (V_F) of the KBL407G at rated current?

At I_F = 4 A and T_J = 25°C, the KBL407G exhibits a maximum forward voltage drop of 1.1 V per diode, as documented in the Electrical Specifications table. This value directly determines conduction losses and must be used in thermal calculations for the KBL407G.

Can the KBL407G be used in surface-mount assembly processes?

No - the KBL407G uses through-hole KBL packaging with 4 axial leads designed for wave or selective soldering. It is not an SMD device; its mechanical outline and lead geometry (including 1.40 mm diameter leads and 5.60 g weight) confirm through-hole mounting per JEDEC MS-012 standards.

What is the junction-to-lead thermal resistance (R_θJL) of the KBL407G?

The KBL407G has a typical junction-to-lead thermal resistance of 2.4°C/W, as published in the Thermal Performance section of the Taiwan Semiconductor datasheet. This parameter is critical for estimating die temperature rise when the KBL407G is mounted to a heatsink or thermally enhanced PCB copper area.

KBL407G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: 4-SIP, KBL

Packaging:: Tray

Product Status:: Active

Diode Type:: Single Phase

Technology:: Standard

Voltage - Peak Reverse (Max):: 1 kV

Current - Average Rectified (Io):: 4 A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 4 A

Current - Reverse Leakage @ Vr:: 10 µA @ 1000 V

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: KBL

KBL407G FAQ

1.How can I place an order for KBL407G through Aetrix?

Please submit a Request for Quotation (RFQ) for KBL407G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for KBL407G reliable?

The price and inventory of KBL407G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBL407G is usually 5 days.

3.What payment methods are accepted for KBL407G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBL407G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KBL407G?

KBL407G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KBL407G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for KBL407G?

For technical support, including KBL407G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBL407G requirements.

6.How does Aetrix verify that KBL407G is sourced from the original manufacturer or authorized distributors?

All KBL407G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that KBL407G meets industry standards.

7.What is the process for return or replacement of KBL407G?

All KBL407G units undergo pre-shipment inspection (PSI). If there is an issue with KBL407G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The KBL407G part is unused and in its original packaging.

Return procedure for KBL407G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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