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Diodes Incorporated MB154
- Part No.:
- MB154
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-Square, MB
- Datasheet:
-
MB154.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 15A MB
- Quantity:
- Payment:
- Shipping:
Inventory:3,007
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Product details
Overview
MB154 from Diodes Incorporated is a high-current silicon bridge rectifier with 400 V maximum recurrent peak reverse voltage (VRRM), 15.0 A average rectified output current at TC = 55°C, and 1.1 V typical forward voltage drop at 7.5 A. It features universal solderable terminals (0.25" Faston), metal case for superior thermal conduction, and is rated for industrial AC/DC power conversion in switch-mode power supplies and motor drives.
For engineers reviewing the MB154 datasheet, MB154 pinout, MB154 application, or MB154 equivalent, key selection criteria include its 400 V blocking rating, 300 A non-repetitive surge capability, 2.5 °C/W junction-to-case thermal resistance, 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 common metal case to convert AC input (e.g., 60 Hz line voltage) into pulsating DC output. Its design centers on high thermal efficiency via direct metal-case heat transfer and low forward conduction loss under sustained load.
Rated for operation from –55°C to +150°C, it supports resistive or inductive loads and exhibits <10 µA reverse leakage at 25°C and <1.0 mA at 100°C - critical for stable DC bus hold-up in unregulated power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum AC peak voltage the device blocks without breakdown; defines usable input voltage range (e.g., ≤280 V RMS). |
| I(AV) | 15.0 A at TC = 55°C - Continuous DC output current capability when case temperature is held at 55°C using heatsink. |
| VF | 1.1 V at 7.5 A - Forward voltage per diode pair; determines conduction loss (≈8.25 W total at 7.5 A). |
| IFSM | 300 A (8.3 ms half-sine) - Surge withstand capacity for inrush or short-circuit events in AC line-fed systems. |
| RJC | 2.5 °C/W - Thermal resistance from junction to case; requires low-RθSA heatsink to maintain Tj ≤150°C. |
| IR | 10 µA at 25°C - Reverse leakage per element; ensures minimal DC bus discharge during off-state in standby mode. |
Pinout & Package
Package: Metal-case, bolt-down bridge rectifier with 4-terminal configuration (AC1, AC2, +, –); UL 94V-0 flammability rating; 29 g mass; mounting torque ≤20 in·lb.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | AC Input Terminal 1 | One leg of AC input; connects to live/phase side of transformer secondary or AC source. |
| AC2 | AC Input Terminal 2 | Second leg of AC input; completes full-wave bridge input path with AC1. |
| (+) | Positive DC Output | Full-wave rectified positive output node; feeds smoothing capacitor or downstream regulator. |
| (–) | Negative DC Output / Common Return | DC return path; serves as reference for output voltage and heatsink ground connection. |
Key Features
| Feature | Design Value |
|---|---|
| High-conductivity metal case | Enables direct bolt-down thermal coupling to heatsink; reduces RθJA by >50% vs. plastic-packaged bridges. |
| Universal mounting terminals | 0.25" Faston lugs support snap-on, solder, or PCB-mounting - simplifies mechanical integration across platforms. |
| UL 94V-0 case material | Meets flame-retardant safety requirements for enclosed industrial power equipment. |
| RoHS-compliant lead-free finish | Complies with EU Directive 2002/95/EC; compatible with modern reflow and wave solder processes. |
Applications
| Industrial Switch-Mode Power Supply | AC Motor Drive Front-End |
|---|---|
Use Scenario: Rectifying 230 VAC mains input in 500–1000 W open-frame SMPS for factory automation controllers. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC line to unregulated DC bus prior to PFC and DC/DC stages. Use Value: 400 V VRRM safely handles 230 VAC ±10% with margin; 15 A I(AV) supports continuous 600 W output with forced-air cooling. | Use Scenario: Converting single-phase AC supply to DC link for 1 HP inverter-driven pumps and fans. IC Role / Device Role / Timing Role: Input-stage rectifier feeding bulk capacitor bank; must survive motor startup surges. Use Value: 300 A IFSM withstands locked-rotor inrush; metal case maintains Tj <125°C under 100% load at 40°C ambient. |
| Uninterruptible Power Supply (UPS) | Welding Equipment Power Stage |
Use Scenario: Battery-charging rectifier in line-interactive UPS handling generator-backed 240 VAC input. IC Role / Device Role / Timing Role: Bidirectional-capable rectifier (when used with external control) managing AC-to-DC and DC-to-AC energy flow. Use Value: Low IR (<10 µA) minimizes battery self-discharge during AC-fail standby; robust case resists vibration-induced fatigue. | Use Scenario: Primary rectification in portable arc-welding inverters drawing 15–20 A from 230 VAC generators. IC Role / Device Role / Timing Role: High-current, high-surge rectifier delivering pulsed DC to inverter H-bridge. Use Value: 2.5 °C/W RJC enables compact heatsink design; 1.1 V VF limits conduction loss during 100% duty-cycle weld cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBPC1504 | Same 400 V VRRM and 15 A I(AV), but plastic DIP-4 package with lower thermal conductivity (RJC ≈ 3.5 °C/W). | Lower-cost alternative where heatsinking is less constrained and vibration resistance is not critical. | Select GBPC1504 only if board space allows larger footprint and thermal budget permits higher junction temperature rise. |
| KBPC1504 | Identical electrical ratings, but uses epoxy-encapsulated metal frame; slightly higher VF (1.15 V) and IR (15 µA at 25°C). | Suitable for cost-sensitive consumer-grade power adapters where UL 94V-0 is not mandated. | Prefer KBPC1504 for non-industrial environments; avoid in high-reliability or high-temperature deployments. |
Compared with MB154, GBPC1504 trades thermal performance for lower assembly cost, while KBPC1504 sacrifices leakage and forward loss for packaging simplicity - making MB154 the optimal choice for thermally demanding, long-life industrial rectification.
Availability
MB154 is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, AC motor drive front-ends, and uninterruptible power supply (UPS) systems requiring stable component supply and long-term lifecycle continuity.
Supply support for MB154 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, specializing in high-efficiency power management, signal integrity, and protection solutions.
The MB series belongs to Diodes' high-current bridge rectifier product line, engineered specifically for ruggedized AC/DC conversion in industrial, automotive, and infrastructure power systems where thermal reliability and surge resilience are critical.
FAQ
Is MB154 RoHS compliant?
Yes, MB154 features a lead-free finish compliant with EU Directive 2002/95/EC (RoHS), effective for date codes 0514 and later. Exemptions for high-temperature solder and glass are applied per Annex Notes 5 and 7 of the directive.
What is the recommended mounting method for MB154?
MB154 must be bolted directly to a heatsink using a #10 screw with maximum torque of 20 in·lb. A silicone thermal compound layer between the metal case and heatsink surface is mandatory to achieve specified RJC = 2.5 °C/W and prevent thermal runaway.
Can MB154 replace MB152 in an existing design?
Yes, MB154 is pin-compatible and mechanically identical to MB152, differing only in VRRM (400 V vs. 200 V). No layout change is needed, but verify that the 400 V rating aligns with system overvoltage requirements and transient protection strategy.
Why is MB154 marked "Not Recommended for New Design"?
Diodes Incorporated recommends migrating to the GBPC15 series due to improved thermal efficiency, smaller footprint, and enhanced surge robustness. However, MB154 remains fully supported for legacy repair, maintenance, and long-lifecycle industrial programs where redesign is impractical.
MB154 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-Square, MB
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 400 V
- Current - Average Rectified (Io):
- 15 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 7.5 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- QC Terminal
- Supplier Device Package:
- MB
MB154 FAQ
1.How can I place an order for MB154 through Aetrix?
Please submit a Request for Quotation (RFQ) for MB154 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 MB154 reliable?
The price and inventory of MB154 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MB154 is usually 5 days.
3.What payment methods are accepted for MB154?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MB154 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MB154?
MB154 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MB154 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 MB154?
For technical support, including MB154 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MB154 requirements.
6.How does Aetrix verify that MB154 is sourced from the original manufacturer or authorized distributors?
All MB154 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 MB154 meets industry standards.
7.What is the process for return or replacement of MB154?
All MB154 units undergo pre-shipment inspection (PSI). If there is an issue with MB154, 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 MB154 part is unused and in its original packaging.
Return procedure for MB154:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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