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Diodes Incorporated MB252
- Part No.:
- MB252
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-Square, MB
- Datasheet:
-
MB252.pdf
- Description:
- BRIDGE RECT 1PHASE 200V 25A MB
- Quantity:
- Payment:
- Shipping:
Inventory:7,142
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Product details
Overview
MB252 from Diodes Incorporated is a high-current silicon bridge rectifier with 200 V maximum recurrent peak reverse voltage, 25 A average rectified output current at TC = 55°C, and 1.1 V typical forward voltage drop at 12.5 A. It features solderable universal terminals (0.25" Faston), metal case for superior thermal dissipation, and RoHS-compliant lead-free finish - used in industrial AC/DC power supplies requiring robust line-frequency rectification.
For engineers reviewing the MB252 datasheet, MB252 pinout, MB252 application, or MB252 equivalent, key selection criteria include its 200 V VRRM rating, 25 A I(AV) derating curve vs. case temperature, thermal resistance of 2.5 °C/W (junction-to-case), and mechanical mounting requirements for bolt-down heat-sink integration with thermal compound.
Technical Context
This single-phase full-wave bridge rectifier integrates four silicon diodes in a compact metal-case package optimized for conduction at 50/60 Hz line frequencies. Its design supports resistive or inductive loads with defined IFSM surge capability (300 A, 8.3 ms half-sine) and low thermal resistance to enable high-power density operation without forced air cooling.
Rated performance assumes case temperature control via direct mounting to a heatsink using #10 screw (20 in·lb max torque) and silicone thermal interface material. Polarity markings (+, −, AC) are physically embossed on the case, and terminal configuration enables snap-on, solder, or PCB board mounting per MIL-STD-202 Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse voltage each diode withstands without breakdown; defines safe AC input voltage range (e.g., ≤141 V RMS). |
| I(AV) | 25.0 A at TC = 55°C - Continuous DC output current capability when case is actively cooled to 55°C; derates to ~17.5 A at TC = 85°C per Fig. 2. |
| VF | 1.1 V at 12.5 A - Forward voltage per diode pair under rated load; determines conduction loss (≈27.5 W total at 25 A output). |
| IFSM | 300 A, 8.3 ms - Non-repetitive surge current tolerance; supports inrush limiting in transformer-fed supplies without fuse coordination issues. |
| RJC | 2.5 °C/W - Junction-to-case thermal resistance; enables calculation of junction temperature rise (e.g., +62.5°C above case at 25 A). |
| IR | 10 µA at 25°C, 1.0 mA at 100°C - Reverse leakage per element; impacts standby power and high-impedance sensing accuracy in precision circuits. |
| Weight | 29 g - Metal-case mass contributes to thermal inertia and mechanical stability during vibration or thermal cycling. |
Pinout & Package
Package: High-conductivity metal case with 0.25" Faston terminals; UL 94V-0 flammability rating; bolt-down mounting with #10 screw hole (H: 4.85–5.59 mm diameter); dimensions A=28.40–28.70 mm, B=10.97–11.23 mm, C=15.50–17.60 mm, E=22.86–25.40 mm, G=13.30–15.30 mm, J=17.10–19.10 mm, K=10.40–12.40 mm, L=0.97–1.07 mm, M=30.50 mm, N=10.97–11.23 mm, P=17.10–19.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC (1) | Input AC terminal (first) | One of two AC input nodes; accepts full-wave AC input; symmetrical with AC (2) for bidirectional line connection. |
| AC (2) | Input AC terminal (second) | Second AC input node; electrically identical to AC (1); enables flexible transformer center-tap or dual-winding routing. |
| (+) | Positive DC output | Anode of internal upper diodes; delivers rectified positive rail; marked with "+" symbol on case surface. |
| (−) | Negative DC output | Cathode of internal lower diodes; serves as return path and system ground reference; marked with "−" symbol. |
Key Features
| Feature | Design Value |
|---|---|
| High-conductivity metal case | Enables direct bolt-down heatsinking with RJC = 2.5 °C/W; eliminates need for insulated mounting hardware in most industrial enclosures. |
| Universal 0.25" Faston terminals | Supports snap-on, solder, or PCB-mounting per MIL-STD-202 Method 208; simplifies field service and prototyping without custom tooling. |
| UL 94V-0 case material | Meets flame-retardant safety requirement for enclosed power equipment; avoids additional enclosure-level fire barrier design. |
| RoHS-compliant lead-free finish | Complies with EU Directive 2002/95/EC (date code 0514+); eliminates Pb-based solder compatibility concerns in automated assembly lines. |
| Moisture sensitivity Level 1 | No baking required prior to reflow; compatible with standard SMT handling and storage protocols per J-STD-020C. |
Applications
| Industrial AC/DC Power Supply | Motor Drive Front-End Rectification |
|---|---|
|
Use Scenario: Converts 115/230 VAC mains to unregulated DC bus in DIN-rail mounted power supplies for PLCs and HMIs. IC Role / Device Role / Timing Role: Full-wave bridge rectifier providing primary DC conversion stage; operates at line frequency with no timing function. Use Value: 25 A continuous output supports ≥300 W power delivery; metal case ensures stable thermal performance under sustained load without fan cooling. |
Use Scenario: Rectifies AC input from variable-frequency drive (VFD) input chokes feeding 3-phase inverter stages in HVAC blowers. IC Role / Device Role / Timing Role: Line-frequency AC-to-DC conversion block; interfaces directly with transformer secondary and bulk capacitor bank. Use Value: 300 A surge rating handles motor startup inrush; low VF minimizes conduction loss in high-duty-cycle applications. |
| Welding Equipment DC Power Stage | Uninterruptible Power Supply (UPS) Input Stage |
|
Use Scenario: Provides high-current DC input to thyristor-controlled welding inverters operating from 208 VAC three-phase sources. IC Role / Device Role / Timing Role: Primary rectification element in high-current, low-voltage DC bus generation; non-switching, passive role. Use Value: Bolt-down mounting and 2.5 °C/W RJC allow operation at >90% duty cycle without thermal shutdown in compact chassis. |
Use Scenario: Rectifies utility AC input in online double-conversion UPS systems before battery charging and inverter stages. IC Role / Device Role / Timing Role: Input-stage bridge rectifier; operates continuously during normal and bypass modes; no signal timing involvement. Use Value: 200 V VRRM supports 170 V peak line voltage with margin; 10 µA IR at 25°C reduces standby power drain in battery-backup mode. |
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 |
|---|---|---|---|
| GBPC252 | Same 200 V VRRM and 25 A I(AV), but plastic DIP-4 package (RJC = 3.0 °C/W); no metal case or Faston terminals. | Requires PCB footprint and heatsink isolation; unsuitable for direct bolt-down or terminal strip wiring. | Select GBPC252 only when space-constrained PCB mounting is mandatory and thermal management uses dedicated heatsink clamps. |
| GBU252 | 200 V VRRM, 25 A I(AV), but GBU-style molded plastic case with leads; RJC = 3.5 °C/W; no Faston or bolt-down option. | Limited to through-hole PCB assembly; lacks mechanical robustness for high-vibration environments like motor control cabinets. | Choose GBU252 for cost-sensitive, low-volume consumer-grade supplies where thermal margin exceeds 15°C and mounting is static. |
Compared with MB252, GBPC252 offers PCB integration but sacrifices thermal efficiency and mounting flexibility, while GBU252 further reduces mechanical ruggedness and thermal performance - making MB252 the preferred choice for industrial systems demanding direct heatsink coupling and field-serviceable terminals.
Availability
MB252 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive front-end rectification, welding equipment DC power stages, and uninterruptible power supply (UPS) input stages requiring stable component supply across multi-year production cycles.
Supply support for MB252 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.
MB252 belongs to the MB15(W)/25(W)/35(W) high-current bridge rectifier product line, engineered specifically for industrial and commercial power conversion systems requiring high thermal reliability, mechanical durability, and legacy-compatible terminal interfaces.
FAQ
What is the maximum ambient temperature for MB252 without heatsink?
MB252 is not rated for operation without a heatsink. Its I(AV) rating is specified at TC = 55°C, meaning case temperature must be maintained at or below that level. Without active heatsinking, junction temperature will exceed safe limits rapidly - even at room ambient - due to 2.5 °C/W RJC and 27.5 W conduction loss at full load. Mounting to a heatsink is mandatory.
Can MB252 be used in a three-phase rectifier configuration?
No. MB252 is a single-phase, full-wave bridge rectifier with two AC inputs and one DC output pair. It cannot replace a three-phase bridge (e.g., six-diode configuration). For three-phase applications, discrete diodes or dedicated three-phase modules such as DB100J or KBPC3510 must be used instead.
Does MB252 support surface-mount assembly?
No. MB252 uses 0.25" Faston terminals and requires bolt-down mounting to a heatsink. It has no surface-mount footprint or reflow-compatible terminations. Its mechanical design targets through-hole, snap-on, or solder-lug assembly - not automated SMT placement or reflow processes.
Why is MB252 marked "Not Recommended for New Design"?
Diodes Incorporated recommends GBPC25 series as a modern replacement due to improved thermal performance (lower RJC), smaller footprint, and enhanced surge robustness. MB252 remains fully functional and supported, but new designs should evaluate GBPC252 for better long-term supply assurance and packaging efficiency - especially in space-constrained or high-volume applications.
MB252 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):
- 200 V
- Current - Average Rectified (Io):
- 25 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 12.5 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 200 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- QC Terminal
- Supplier Device Package:
- MB
MB252 FAQ
1.How can I place an order for MB252 through Aetrix?
Please submit a Request for Quotation (RFQ) for MB252 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 MB252 reliable?
The price and inventory of MB252 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MB252 is usually 5 days.
3.What payment methods are accepted for MB252?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MB252 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MB252?
MB252 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MB252 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 MB252?
For technical support, including MB252 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MB252 requirements.
6.How does Aetrix verify that MB252 is sourced from the original manufacturer or authorized distributors?
All MB252 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 MB252 meets industry standards.
7.What is the process for return or replacement of MB252?
All MB252 units undergo pre-shipment inspection (PSI). If there is an issue with MB252, 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 MB252 part is unused and in its original packaging.
Return procedure for MB252:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MB252 Tags
-
HDS10M-13
Diodes Incorporated
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CD-MBL106S
Bourns Inc.
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MB10S-13
Diodes Incorporated
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CD-MBL206SL
Bourns Inc.
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MB4S-TP
Micro Commercial Co
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MB6S-TP
Micro Commercial Co
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CD-MBL210S
Bourns Inc.
-
BAS3007ARPPE6327HTSA1
Infineon Technologies
-
DF02M
Diodes Incorporated
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CD-MBL210SL
Bourns Inc.
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DF04M
Diodes Incorporated
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DF01M
Diodes Incorporated
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