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Diodes Incorporated KBP404G
- Part No.:
- KBP404G
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, KBP
- Datasheet:
-
KBP404G.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 4A KBP
- Quantity:
- Payment:
- Shipping:
Inventory:67
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Product details
Overview
KBP404G from Diodes Incorporated is a 4.0A, 400V standard recovery bridge rectifier in KBP package, featuring 1.1V max forward voltage at 4.0A, ≤5μA reverse leakage at 1000V/25°C, and 130A non-repetitive surge rating - deployed in AC/DC power supplies for LED lighting and office equipment.
For engineers reviewing the KBP404G datasheet, KBP404G pinout, KBP404G application, or KBP404G equivalent, key selection criteria include peak repetitive reverse voltage (400V), thermal resistance junction-to-case (6°C/W with heatsink), surge current capability (130A @ 8.3ms), and RoHS-compliant lead-free finish.
Technical Context
This single-phase, full-wave bridge rectifier integrates four silicon diodes in one molded plastic KBP package, configured for standard recovery operation with typical 40pF capacitance per element at 4V/1MHz. It supports resistive or inductive loads at 60Hz, with derating required for capacitive loads.
Thermal performance is defined by two operating conditions: with heatsink (RθJC = 6°C/W) and without (RθJA = 40°C/W), enabling design flexibility across low- to medium-power applications where thermal management varies significantly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum peak repetitive reverse voltage; defines safe AC input voltage ceiling before breakdown. |
| IO (TC=105°C) | 4.0 A - average rectified output current with heatsink; sets continuous DC load capacity in thermally managed designs. |
| VF (IF=4.0A) | 1.1 V max - forward voltage drop per diode element; directly impacts conduction loss and thermal rise in power stage. |
| IR (VR=1000V) | 5 μA max at 25°C - reverse leakage current; critical for low-power standby efficiency and high-impedance hold-up circuits. |
| IFSM (8.3ms) | 130 A - non-repetitive surge current rating; determines robustness against line transients and inrush events. |
| RθJC | 6 °C/W - junction-to-case thermal resistance with heatsink; enables accurate temperature rise calculation for thermal design. |
Pinout & Package
Package: KBP - molded plastic, UL 94V-0 rated, 1.52g weight, with bright tin-plated leads solderable per MIL-STD-202 Method 208. Polarity marked on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~ (AC1) | AC Input Terminal 1 | One of two AC input nodes; connects to live/neutral side of transformer secondary or AC line. |
| ~ (AC2) | AC Input Terminal 2 | Second AC input node; completes full-wave bridge input path with AC1. |
| + (DC+) | Positive DC Output | Anode of internal bridge output; delivers rectified positive voltage to filter capacitor or load. |
| – (DC–) | Negative DC Output / Ground Reference | Cathode of internal bridge output; serves as return path and system ground reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die construction | Enhances long-term reliability and moisture resistance in humid or industrial environments. |
| UL Recognized File # E95060 | Validates safety compliance for end-equipment certification in North American markets. |
| Surge overload rating: 130A (8.3ms) | Withstands common AC line surges without failure, reducing need for external MOVs in cost-sensitive designs. |
| Lead-free, RoHS-compliant finish | Meets global environmental regulations and enables compatibility with Pb-free reflow soldering processes. |
Applications
| LED Driver Power Supply | Office Equipment AC/DC Adapter |
|---|---|
Use Scenario: Converts 120/230VAC mains to unregulated DC for constant-current LED drivers in commercial lighting fixtures. IC Role / Device Role / Timing Role: Full-wave bridge rectifier providing polarity-insensitive AC input conversion prior to bulk capacitor filtering. Use Value: 4.0A IO rating supports up to 40W LED loads; low VF minimizes heat generation in enclosed fixture housings. |
Use Scenario: Rectifies transformer secondary output in compact wall adapters powering printers, scanners, and monitors. IC Role / Device Role / Timing Role: Primary AC-to-DC conversion stage delivering stable DC bus for downstream switching regulator ICs. Use Value: KBP package footprint enables PCB space savings vs. discrete diode solutions; 130A IFSM handles adapter plug-in surges. |
| Home Appliance Control Board | Telecom Wall-Mounted Power Module |
Use Scenario: Supplies auxiliary DC power for microcontroller, display, and sensor circuitry in washing machines and microwaves. IC Role / Device Role / Timing Role: Mains-fed bridge rectifier feeding linear regulator or buck converter for low-noise logic supply. Use Value: ≤5μA IR ensures minimal standby power draw; glass passivation improves lifetime under thermal cycling. |
Use Scenario: Provides primary rectification in compact telecom power modules for VoIP phones and network gateways. IC Role / Device Role / Timing Role: Input-stage bridge converting AC input to DC bus for isolated flyback or forward converters. Use Value: UL recognition simplifies end-product safety approvals; 400V VRRM accommodates 264VAC nominal inputs with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU4K | Same 4A/400V rating, GBU package (larger footprint, higher RθJA = 50°C/W), no UL recognition. | Suitable for non-certified industrial controls where safety agency approval is not required. | Select when board space allows larger package and UL listing is unnecessary. |
| KBL404 | Identical electrical specs, KBL package (in-line, 4-pin), different pinout (AC1/AC2/+/- arranged linearly). | Fits through-hole layouts requiring straight-pin orientation; incompatible with KBP footprint. | Choose only if mechanical layout mandates in-line lead configuration and PCB rework is feasible. |
Compared with GBU4K and KBL404, KBP404G offers certified safety compliance, optimized thermal performance with heatsink, and surface-mount-compatible KBP footprint - making it preferred for regulated consumer and telecom power supplies where certification, size, and thermal efficiency are jointly critical.
Availability
KBP404G is available at Aetrix Electronics and suitable for LED lighting drivers, office equipment adapters, home appliance control boards, and telecom power modules requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for KBP404G 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
KBP404G belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-volume AC/DC front-end conversion in safety-certified power supplies.
FAQ
What is the maximum operating temperature for KBP404G?
KBP404G has an operating junction temperature range of –55°C to +150°C. Its thermal resistance junction-to-case is 6°C/W with heatsink, allowing sustained 4.0A operation at TC = +105°C. Without heatsink, derating applies per Figure 1 in DS39310.
Is KBP404G suitable for capacitive-input filter applications?
No - the datasheet explicitly requires 20% current derating for capacitive loads due to high peak currents. It is optimized for resistive or inductive loads at 60Hz; use with bulk capacitors demands careful thermal analysis and may require oversized heatsinking or alternative soft-recovery devices.
Does KBP404G meet automotive qualification standards?
KBP404G is not AEC-Q101 qualified. While Diodes offers automotive-grade variants (e.g., KBP404G-A), this standard version lacks PPAP documentation, IATF 16949 manufacturing evidence, and extended temperature validation required for automotive use.
How is polarity marked on the KBP404G package?
Polarity is marked on the top surface of the KBP package: a white bar identifies the DC+ (anode) output terminal, while the cathode (DC–) and AC terminals are positioned accordingly per the standard KBP outline drawing. Pin 1 (AC1) is adjacent to the marking bar.
KBP404G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SIP, KBP
- Packaging:
- Tube
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 400 V
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 4 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- KBP
KBP404G FAQ
1.How can I place an order for KBP404G through Aetrix?
Please submit a Request for Quotation (RFQ) for KBP404G 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 KBP404G reliable?
The price and inventory of KBP404G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBP404G is usually 5 days.
3.What payment methods are accepted for KBP404G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBP404G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBP404G?
KBP404G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBP404G 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 KBP404G?
For technical support, including KBP404G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBP404G requirements.
6.How does Aetrix verify that KBP404G is sourced from the original manufacturer or authorized distributors?
All KBP404G 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 KBP404G meets industry standards.
7.What is the process for return or replacement of KBP404G?
All KBP404G units undergo pre-shipment inspection (PSI). If there is an issue with KBP404G, 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 KBP404G part is unused and in its original packaging.
Return procedure for KBP404G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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