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

Diodes Incorporated MB1505W

Name: MB1505W
Brand: Diodes Incorporated
SKU: MB1505W
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MB1505W

Manufacturer:: Diodes Incorporated

Category:: Bridge Rectifiers

Package:: 4-Square, MB-W

Datasheet:: MB1505W.pdf

Description:: BRIDGE RECT 1PHASE 50V 15A MB-W

Quantity:: RFQ Add To RFQ list

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Inventory:5,847

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Product details

Overview

MB1505W from Diodes Incorporated is a high-current silicon bridge rectifier with wire-lead termination (suffix "W"), rated for 50 V recurrent peak reverse voltage and 15 A average rectified output current at TC = 55°C, featuring 1.1 V typical forward voltage drop at 7.5 A and UL 94V-0 case material. It is designed for AC-to-DC conversion in industrial power supplies and motor drive front-end rectification.

For engineers reviewing the MB1505W datasheet, MB1505W pinout, MB1505W application, or MB1505W equivalent, key selection criteria include thermal resistance (R_JC = 2.5 °C/W), surge current rating (I_FSM = 300 A), RoHS-compliant lead-free finish, and bolt-down mounting requirement with thermal compound for heat-sink coupling.

Technical Context

This single-phase full-wave bridge rectifier integrates four silicon diodes in a monolithic metal-case package optimized for high thermal conductivity and mechanical robustness. Its universal terminals support snap-on, solder, or PCB mounting, and polarity symbols are marked directly on the case.

The device operates across –55°C to +150°C junction temperature range, with I²t fusing rating of 373 A²s (8.3 ms), and exhibits <10 µA reverse leakage at 25°C and rated V_R, rising to 1.0 mA at 100°C - critical for reliability in thermally demanding environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - maximum non-repetitive peak reverse voltage per diode leg; defines safe AC input swing before breakdown
I_(AV)	15.0 A - average DC output current at case temperature 55°C; determines continuous power-handling capability
V_F	1.1 V @ 7.5 A - forward voltage drop per conducting diode pair; sets conduction loss and thermal load under nominal load
I_FSM	300 A - peak non-repetitive surge current (60 Hz half-sine); supports inrush tolerance during cold start
R_JC	2.5 °C/W - junction-to-case thermal resistance; enables thermal design using heatsink interface with silicone compound
I_R	10 µA @ 25°C - reverse leakage per element; low leakage preserves efficiency in high-impedance hold-up stages
Weight	29 g - physical mass impacts mechanical mounting stability and thermal inertia in chassis-mounted systems

Pinout & Package

MB1505W uses a metal-case, wire-lead (W-suffix) package with four insulated tinned copper leads: two AC inputs (marked ~), one positive DC output (+), and one negative DC output (–). Mounting requires bolt-down to heatsink with thermal compound.

Pin/Terminal	Circuit Role	Design Meaning
AC1 / AC2	AC Input Terminals	Accept full-wave AC input; internally connected to opposite anode/cathode pairs of the bridge
+	Positive DC Output	Full-wave rectified output node; connects to bulk capacitor positive rail or downstream regulator input
–	Negative DC Output	Common return path; serves as system ground reference for DC output stage

Key Features

Feature	Design Value
High-conductivity metal case	Enables direct bolt-down thermal coupling to heatsink, reducing R_JA by up to 50% vs. plastic-packaged bridges
UL 94V-0 flammability rating	Meets safety standards for enclosure-integrated power modules in industrial equipment
Lead-free, RoHS-compliant finish	Complies with EU Directive 2002/95/EC; compatible with modern reflow and wave solder processes
0.25" Faston-compatible leads	Supports field-serviceable terminal connections without PCB footprint redesign

Applications

Industrial Power Supply

Motor Drive Front-End

Use Scenario: 50–60 Hz AC line rectification feeding 300–500 V DC bus in DIN-rail mounted PSUs.

IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC mains to unregulated DC; no timing function.

Use Value: 15 A I_(AV) and 300 A I_FSM sustain repeated motor startup surges without degradation.

Use Scenario: Rectifying three-phase auxiliary supply (via center-tapped transformer) for gate driver bias rails.

IC Role / Device Role / Timing Role: Discrete bridge rectifier providing isolated low-power DC for control circuitry; no timing role.

Use Value: Low 1.1 V V_F minimizes self-heating in compact enclosures where airflow is restricted.

Welding Equipment Power Stage

UPS Input Rectifier Module

Use Scenario: High-duty-cycle rectification in portable arc welders with intermittent 100% load cycles.

IC Role / Device Role / Timing Role: Primary AC/DC conversion element; handles repetitive short-duration overloads.

Use Value: 373 A²s I²t rating ensures fuse coordination and prevents thermal runaway during 100 ms surges.

Use Scenario: Line-frequency rectification in online double-conversion UPS systems with battery backup.

IC Role / Device Role / Timing Role: Bulk rectifier in input stage; operates continuously under varying load profiles.

Use Value: –55°C to +150°C operating range supports reliable operation in battery rooms with wide ambient swings.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
GBPC1505	Same 50 V V_RRM, 15 A I_(AV), but molded plastic case with PCB mount footprint; R_JC = 3.0 °C/W	Designed for automated PCB assembly; lacks bolt-down metal case for direct heatsinking	Select when board space and SMT compatibility outweigh thermal performance needs
KBPC1505	Identical electrical ratings, but industry-standard KBPC outline with 0.25" spade terminals; R_JC = 2.7 °C/W	Widely stocked legacy part; same mounting method but slightly higher thermal resistance	Choose for drop-in replacement where existing tooling supports KBPC form factor

Compared with MB1505W, GBPC1505 trades thermal performance for PCB integration, while KBPC1505 offers near-identical mechanical and thermal behavior but with broader distributor availability and longer production history.

Availability

MB1505W is available at Aetrix Electronics and suitable for industrial power supplies, motor drive front-ends, and welding equipment requiring stable component supply and long-term BOM continuity.

Supply support for MB1505W 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 industrial, computing, consumer, and communications markets.

The MB series belongs to Diodes' high-current bridge rectifier product line, engineered specifically for ruggedized AC/DC conversion in thermally constrained, high-reliability power systems.

FAQ

What does the "W" suffix mean in MB1505W?

The "W" suffix denotes wire-lead termination - tinned copper leads replacing the standard 0.25" Faston terminals. This allows direct soldering or crimping in applications where spade connectors are impractical, while retaining identical electrical and thermal specifications.

Is MB1505W suitable for PCB mounting?

MB1505W is not designed for standard PCB through-hole or surface-mount assembly. Its wire leads require external mechanical support and bolt-down heatsink mounting with thermal compound. PCB mounting would compromise thermal performance and violate mechanical stress limits specified in DS21303 Rev. 7.

Why is MB1505W marked "Not Recommended for New Design"?

Diodes Incorporated recommends migrating to the GBPC15 series due to enhanced manufacturing consistency, wider global distribution, and improved long-term availability. MB1505W remains fully functional and supported, but new designs should evaluate GBPC1505 for better supply chain resilience.

What is the required mounting torque for MB1505W?

The recommended mounting torque for the #10 screw used to secure MB1505W to a heatsink is 20 in·lb maximum. Exceeding this risks case deformation, internal bond-wire damage, or compromised thermal interface integrity, directly affecting R_JC and long-term reliability.

MB1505W Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 4-Square, MB-W

Packaging:: Bulk

Product Status:: Obsolete

Diode Type:: Single Phase

Technology:: Standard

Voltage - Peak Reverse (Max):: 50 V

Current - Average Rectified (Io):: 15 A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 7.5 A

Current - Reverse Leakage @ Vr:: 10 µA @ 50 V

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: MB-W

MB1505W FAQ

1.How can I place an order for MB1505W through Aetrix?

Please submit a Request for Quotation (RFQ) for MB1505W 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 MB1505W reliable?

The price and inventory of MB1505W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MB1505W is usually 5 days.

3.What payment methods are accepted for MB1505W?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MB1505W transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MB1505W?

MB1505W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MB1505W 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 MB1505W?

For technical support, including MB1505W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MB1505W requirements.

6.How does Aetrix verify that MB1505W is sourced from the original manufacturer or authorized distributors?

All MB1505W 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 MB1505W meets industry standards.

7.What is the process for return or replacement of MB1505W?

All MB1505W units undergo pre-shipment inspection (PSI). If there is an issue with MB1505W, 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 MB1505W part is unused and in its original packaging.

Return procedure for MB1505W:

1.Submit a request within 90 days.

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

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