MBRB1045HM3/I - 10A, 45V Schottky Rectifier D2PAK | Vishay
MPN: MBRB1045HM3/I ✓ Hoạt độngMBRB1045HM3/I Tóm tắt
The MBRB1045HM3/I series is designed around the Schottky barrier principle: A Schottky diode is a unipolar device in which current is carried by majority carriers only, eliminating the reverse-recovery charge that plagues PN-junction rectifiers. This makes it the rectifier of choice for outputs above ~1 MHz and for any system switching for unidirectional current conduction in switch-mode power supplies, where it minimizes switching loss, improves efficiency, and allows smaller magnetics.
Key features of the MBRB1045HM3/I include very low forward voltage drop, low reverse leakage current across the full operating temperature range, a guard ring for over-voltage transient protection, and a solderable plating (Matte finish). The TO-263AB (D2PAK) package offers a low thermal resistance (R_THS-C ~ 0.7 C/W) suitable for full 10 A continuous current at moderate copper area, with an operating junction temperature above 150 C and a peak surge forward current of 90 A.
Typical applications for the MBRB1045HM3/I include switch-mode power supply (SMPS) outputs, DC-to-DC converters, freewheeling diodes in motor and relay drive circuits, reverse-polarity protection in USB-UPS batteries, and high-current OR-ing in machines and industrial systems.
When designing with this part, ensure the junction temperature stays below 150 C by providing adequate copper heatsinking and computing power dissipation at the intended forward current. The full reel or specific variant with HM3 suffix carries a halogen-free, lead-free, and RoHS-compliant terminal finish.
Bộ thay thế dễ dàng lắp đặt cho MBRB1045HM3/I — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MBRB1035HM3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
VS-MBRB1045HM3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
VS-MBRB1045-M3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MBRB2545CT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SBR10U45P1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MBRB1045
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MBRB1045HM3/I Tỷ lệ tối đa & tính chất điện
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Product Type | Single Schottky Rectifier |
| Reverse Voltage (V_R) | 45 V |
| Average Forward Current (I_F(AV)) | 10 A |
| Khoảng nhiệt độ mối nối hoạt động | -40 C to +150 C |
| Hộp | TO-263AB (D2PAK) surface mount, 2 leads + tab |
| Kiểu lắp đặt | Surface Mount |
| Configuration | Single (1 diode) |
| Đông trùng haogen | Yes |
| Lead-Free / RoHS Status | Yes - RoHS compliant |
Cấu hình chân MBRB1045HM3/I
| Chân 1 | Anode — Anode lead (positive terminal of the Schottky rectifier) |
| Chân 2 | Cathode — Cathode lead (negative terminal), internally connected to the mounting tab |
| Chân TAB | Cathode (Tab) — Center mounting tab, internally connected to Pin 2 cathode; serves as heatsink and cathode terminal |
Forward Current vs Forward Voltage (DC, T_J = 25 C / 100 C / 150 C)
Ứng dụng tiêu biểu
MBRB1045HM3/I phù hợp cho 6 Áp dụngs: Switch-Mode Power Supply (SMPS) Output Rectifier, DC-DC Buck Converter Freewheeling Diode, Reverse-Polarity Protection (Battery / UPS), Freewheeling Diode for Relays and Solenoids, OR-ing Diode for Redundant Power Systems, Solar Panel Blocking Diode.
Switch-Mode Power Supply (SMPS) Output Rectifier
The MBRB1045HM3/I is used as the output rectifier in forward-converter and flyback SMPS topologies delivering 5 V, 12 V, or 24 V rails at currents up to 10 A. Its low forward voltage drop minimizes conduction loss and improves overall efficiency, especially at higher output currents. The Schottky construction eliminates reverse-recovery charge, which simplifies snubber design and reduces switching losses in the primary switch. The TO-263AB (D2PAK) package provides low R_THS-J allowing direct PCB heatsinking via copper pour, eliminating external heatsinks in most SMPS layouts. Use it in 24 V industrial bus systems where its 45 V rating handles inductive kickback from transformer leakage inductance safely.
Được đề xuất
DC-DC Buck Converter Freewheeling Diode
The MBRB1045HM3/I serves as the synchronous-rectifier or freewheeling diode in buck converters and POL modules converting 12 V or 24 V buses to lower logic rails. At switching frequencies of 100 kHz to 500 kHz, the Schottky's zero reverse-recovery charge eliminates the turn-on loss that would occur with a PN-junction rectifier, raising converter efficiency by 1-3 percent. Its 10 A average forward current supports buck converters delivering 5-8 A continuous to processor cores or memory banks. The TO-263AB footprint with center cathode tab provides a low-impedance thermal path that keeps junction temperature below 100 C at full load with modest copper heatsinking. Designers should verify V_F at the actual operating current and ambient.
Được đề xuất
Reverse-Polarity Protection (Battery / UPS)
In reverse-polarity protection circuits on battery-powered equipment, UPS systems, and automotive 12 V/24 V boards, the MBRB1045HM3/I is placed in series with the supply rail to block reverse-current flow when the input polarity is reversed. Its 45 V reverse-voltage rating easily covers 24 V battery transients including load-dump spikes, and the 10 A forward current supports full-system load. Compared to a P-channel MOSFET reverse-polarity protection solution, the MBRB1045HM3/I has lower quiescent current draw (zero gate drive) but adds the Schottky forward drop (typically 0.4-0.5 V at full current). Its Schottky construction means no inrush current spike at reverse-polarity events.
Được đề xuất
Freewheeling Diode for Relays and Solenoids
The MBRB1045HM3/I is commonly used as a freewheeling (snubber) diode across relay coils, solenoid valves, motor windings, and other inductive loads. When the driving transistor or contact opens, the inductive stored energy would otherwise produce a high-voltage spike that destroys the switching device. The MBRB1045HM3/I clamps this spike to its forward voltage and dissipates the stored energy safely, with its 45 V reverse rating comfortably exceeding typical 12 V or 24 V coil supply transients. Its low forward drop reduces heat in continuous-duty applications, and its TO-263AB package provides good thermal performance for sustained freewheeling duty. The 10 A rating handles the high inrush current common to solenoid energization.
Được đề xuất
OR-ing Diode for Redundant Power Systems
In redundant power architectures where two supplies are diode-ORed to feed a critical system, the MBRB1045HM3/I provides a low-loss unidirectional coupling between two 12 V or 24 V sources. Its low forward voltage drop (around 0.4-0.5 V at moderate current) reduces the loss compared to standard PN-junction rectifiers, and the 10 A rating supports 5-8 A continuous load sharing between sources. For higher-current or lower-loss OR-ing, designers often pair the MBRB1045HM3/I with a P-channel MOSFET in a smart-OR topology. The TO-263AB package allows direct PCB heatsinking in the redundant supply path.
Được đề xuất
Solar Panel Blocking Diode
In photovoltaic charge controllers and off-grid solar power systems, the MBRB1045HM3/I serves as a blocking diode placed in series with each solar panel string to prevent reverse-current flow from the battery bank back into the panel during low-light or nighttime conditions. The 45 V reverse rating easily covers 12 V or 24 V panel open-circuit voltages with margin, and the 10 A forward current supports panel arrays delivering 5-8 A peak charge current. Its low forward voltage drop improves overall charging efficiency by 1-3 percent compared to standard PN-junction rectifiers, which directly translates to more energy harvested from the panels.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MBRB1045HM3/I — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MBRB1035HM3 | VS-MBRB1045HM3 | VS-MBRB1045-M3 | MBRB2545CT | SBR10U45P1 | MBRB1045 |
|---|---|---|---|---|---|---|---|
| Brand | Vishay | Vishay | Vishay | Vishay | Vishay | Diodes Incorporated | Vishay |
| Package | TO-263AB (D2PAK) | TO-263AB (D2PAK) - same | TO-263AB (D2PAK) - same | TO-263AB (D2PAK) - same | TO-263AB (D2PAK) - same | TO-263AB (D2PAK equivalent) - same | TO-263AB (D2PAK) - same |
| Reverse Voltage (V_R) | 45 V | 35 V (-22%) | 45 V (same) | 45 V (same) | 45 V (same) | 45 V (same) | 45 V (same) |
| Average Forward Current (I_F(AV)) | 10 A | 10 A (same) | 10 A (same) | 10 A (same) | 2 x 12.5 A (dual diode) | 10 A (same) | 10 A (same) |
| Configuration | Single diode | Single diode | Single diode | Single diode | Dual common-cathode | Single diode | Single diode |
| Rectifier Technology | Schottky | Schottky | Schottky | Schottky | Schottky | SBR (Super Barrier Rectifier) | Schottky |
| Junction Temperature Range | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C | -55 C to +175 C | -40 C to +150 C |
| Halogen-Free / Lead-Free | Yes (Matte finish) | Yes | Yes | Yes | Yes | Yes | Yes (legacy finish) |
Bảo phân biệt quan trọng
- Drop-in compatible with 35 V MBRB1035HM3 (same die, same package) (vsMBRB1035HM3)
- Cross-brand compatibility with Diodes Incorporated SBR family (vsSBR10U45P1)
- High-performance Schottky with low leakage at high temperature (vsVS-MBRB1045HM3)
Ghi chú thiết kế
Estimated: At I_F = 10 A and V_F = 0.55 V, the MBRB1045HM3/I dissipates approximately 5.5 W of forward-conduction power. The TO-263AB package's typical R_THS-J is around 0.7 C/W and R_THS-A on a 0.5 sq-in copper pour is approximately 50-60 C/W. This yields a junction temperature rise of about 60-70 C above ambient at full load - well within the 150 C maximum when ambient is below 80 C. For continuous operation at maximum current, provide at least 1 square inch of copper pours connected to the center tab.
The TO-263AB (D2PAK) center tab is internally connected to the cathode (Pin 2) and must be soldered to a copper pour that serves as both the cathode connection and the heatsink. Use multiple thermal vias under the tab to conduct heat to inner PCB copper layers. Place the MBRB1045HM3/I near the switching node to minimize trace inductance, which can cause voltage overshoot during reverse-recovery transitions. The anode (Pin 1) and cathode (Pin 2) traces should be wide enough to carry 10 A continuous with minimal voltage drop.
Do not parallel two MBRB1045HM3/I parts directly without ballast resistors - Schottky diode V_F has a negative temperature coefficient, so the hotter device will conduct more current, leading to thermal runaway. For higher current applications, use a single larger diode or design with proper current-sharing. Do not exceed the 45 V reverse-voltage rating with transients - add a TVS or snubber across the diode in high-dI/dt switching applications.
Thông tin tuân thủ
RoHS compliant per Vishay product page and Mouser listing. Lead-free Matte tin finish. Halogen-free per Vishay datasheet 96115. Not AEC-Q100 qualified (not an automotive-grade part per Vishay datasheet 96115).
