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Diodes Incorporated MB356-F
- Part No.:
- MB356-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-Square, MB
- Datasheet:
-
MB356-F.pdf
- Description:
- BRIDGE RECT 1PHASE 600V 35A MB
- Quantity:
- Payment:
- Shipping:
Inventory:4,361
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Product details
Overview
MB356-F from Diodes Incorporated is a high-current silicon bridge rectifier with 600 V maximum recurrent peak reverse voltage, 35 A average rectified output current at TC = 55°C, and 1.2 V typical forward voltage drop at 17.5 A, used in industrial AC/DC power supplies and motor drive front-end rectification.
For engineers reviewing the MB356-F datasheet, MB356-F pinout, MB356-F application, or MB356-F equivalent, key selection criteria include thermal resistance (2.5 °C/W junction-to-case), I²t fusing rating (664 A²s), RoHS-compliant lead-free finish, and bolt-down mounting requirement for heatsink coupling.
Technical Context
This single-phase full-wave bridge rectifier integrates four high-conductivity silicon diodes in a metal case optimized for thermal dissipation. It operates across –55°C to +150°C junction temperature range and supports 60 Hz resistive or inductive loads without derating below 55°C case temperature.
The device uses universal terminals compatible with snap-on, solder, or PCB mounting, and features UL 94V-0 case material with moisture sensitivity Level 1 per J-STD-020C. Polarity symbols are marked directly on the case for unambiguous AC/DC terminal identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Maximum peak reverse voltage per diode leg; defines safe AC input voltage ceiling (e.g., ≤424 V RMS). |
| I(AV) | 35.0 A at TC = 55°C - Continuous DC output current capability when case is actively cooled to 55°C. |
| VF | 1.2 V at 17.5 A - Forward voltage drop per conducting diode pair; determines conduction loss (≈42 W total at full load). |
| IFSM | 400 A (8.3 ms half-sine) - Surge withstand capacity; supports inrush limiting in transformer-fed supplies. |
| RJC | 2.5 °C/W - Junction-to-case thermal resistance; requires low-thermal-resistance interface (e.g., silicone compound) to heatsink. |
| I²t | 664 A²s - Fusing integral; enables coordination with upstream fast-acting fuses for short-circuit protection. |
Pinout & Package
Package: High-conductivity metal case with 0.25" Faston terminals and bolt-down mounting interface (M3.5 or #10 screw). Dimensions: 28.4–28.7 mm (A) × 10.97–11.23 mm (B) × 15.5–17.6 mm (C); weight ≈29 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 / AC2 | AC Input Terminals | Two symmetrical AC inputs accepting full-wave bridge input; polarity-insensitive for line-neutral or line-line AC sources. |
| (+) | Positive DC Output | Anode of internal diode pair; delivers rectified positive rail; must connect to load/high-side return path. |
| (–) | Negative DC Output | Cathode of internal diode pair; serves as common DC return; requires low-impedance path to system ground or negative rail. |
Key Features
| Feature | Design Value |
|---|---|
| High thermal conductivity metal case | Enables direct bolt-down heatsinking with RJC = 2.5 °C/W - critical for sustained 35 A operation without forced air. |
| UL 94V-0 flame-retardant housing | Meets safety standards for enclosed industrial equipment; eliminates need for supplemental enclosure flame barriers. |
| Universal mounting terminals | Supports snap-on, solder, or PCB-mount integration - simplifies mechanical design across legacy and new board layouts. |
| RoHS-compliant lead-free finish (Date Code 0514+) | Complies with EU Directive 2002/95/EC; eliminates hazardous substances without compromising solderability or thermal performance. |
Applications
| Industrial AC/DC Power Supplies | Motor Drive Front-End Rectification |
|---|---|
Use Scenario: 3-phase or single-phase input rectification in DIN-rail mounted 24–48 V DC power systems delivering up to 1 kW. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC mains to unregulated DC bus prior to filtering and regulation. Use Value: 35 A continuous rating and 400 A surge capacity support high-startup-current loads like solenoids and contactors. | Use Scenario: Rectifying AC input for variable-frequency drive (VFD) DC link in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Primary AC-to-DC conversion stage feeding bulk capacitor bank and inverter stage. Use Value: Metal-case thermal design sustains operation under ambient temperatures up to 70°C with passive heatsinking only. |
| Welding Equipment Power Stages | Uninterruptible Power Supply (UPS) Input Stage |
Use Scenario: High-duty-cycle rectification in arc welding inverters requiring robust surge handling and thermal stability. IC Role / Device Role / Timing Role: Main rectifier delivering high-current DC to inverter H-bridge; subjected to repetitive 400 A surges. Use Value: 664 A²s I²t rating allows coordination with Class T fuses for selective short-circuit protection. | Use Scenario: Line-powered UPS units where reliability and long-term thermal cycling endurance are critical. IC Role / Device Role / Timing Role: Input-stage bridge enabling battery backup during AC failure; operates continuously during normal mode. Use Value: –55°C to +150°C operating range ensures functionality across storage, transport, and operational environments. |
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 |
|---|---|---|---|
| GBPC3506 | Same 600 V VRRM and 35 A I(AV), but plastic package (RJC = 3.0 °C/W); lower IFSM (350 A). | Less suitable for bolt-down heatsinking; requires larger heatsink or forced cooling for same thermal load. | Select when PCB footprint compatibility or lower cost outweighs thermal performance needs. |
| KBPC3506 | Identical electrical ratings, but ceramic/metal hybrid package; RJC = 2.8 °C/W; no UL 94V-0 marking. | Limited compliance documentation for safety-critical industrial enclosures. | Prefer where legacy KBPC footprint reuse is mandatory and UL certification is not required. |
Compared with MB356-F, GBPC3506 trades thermal efficiency for lower cost and surface-mount adaptability, while KBPC3506 offers near-equivalent thermal performance but lacks UL safety certification - making MB356-F optimal for thermally constrained, safety-certified industrial designs.
Availability
MB356-F is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive front-end rectification, and welding equipment power stages requiring stable component supply and long-lifecycle support.
Supply support for MB356-F 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, with design and manufacturing operations across Asia and the Americas.
The MB-series bridge rectifiers target high-reliability industrial power conversion, emphasizing thermal robustness, surge resilience, and mechanical mounting flexibility for harsh-environment applications.
FAQ
What is the recommended heatsink interface for MB356-F?
MB356-F requires direct bolt-down mounting to a flat, clean heatsink using silicone thermal compound between the metal case and heatsink surface. Mounting torque must not exceed 20 in·lb to avoid case deformation. No insulating pads should be used unless electrically isolated mounting is explicitly required.
Is MB356-F suitable for PCB through-hole mounting?
Yes - MB356-F supports PCB mounting via its universal 0.25" Faston terminals, which accept standard 6.35 mm spade connectors or can be soldered directly to plated-through holes. Mechanical retention requires additional strain relief or bracketing due to weight (29 g) and thermal cycling stress.
Why is MB356-F marked "NOT RECOMMENDED FOR NEW DESIGN"?
Diodes Incorporated recommends migrating to the GBPC35 series due to improved manufacturability, broader global distribution, and enhanced packaging consistency. MB356-F remains fully supported for existing designs and legacy replacements, with no announced obsolescence date.
Does MB356-F meet automotive AEC-Q101 requirements?
No - MB356-F is not qualified to AEC-Q101. It is rated for industrial temperature range (–55°C to +150°C) and complies with RoHS and UL 94V-0, but lacks automotive-specific qualification testing such as HTOL, temperature cycling, or ESD robustness per AEC standards.
MB356-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-Square, MB
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 600 V
- Current - Average Rectified (Io):
- 35 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 17.5 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 600 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- QC Terminal
- Supplier Device Package:
- MB
MB356-F FAQ
1.How can I place an order for MB356-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MB356-F 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 MB356-F reliable?
The price and inventory of MB356-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MB356-F is usually 5 days.
3.What payment methods are accepted for MB356-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MB356-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MB356-F?
MB356-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MB356-F 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 MB356-F?
For technical support, including MB356-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MB356-F requirements.
6.How does Aetrix verify that MB356-F is sourced from the original manufacturer or authorized distributors?
All MB356-F 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 MB356-F meets industry standards.
7.What is the process for return or replacement of MB356-F?
All MB356-F units undergo pre-shipment inspection (PSI). If there is an issue with MB356-F, 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 MB356-F part is unused and in its original packaging.
Return procedure for MB356-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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