MBRB1045HM3/I - 10A, 45V Schottky Rectifier D2PAK | Vishay
Référence : MBRB1045HM3/I ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.21 | $12,10 |
| 100 | $0.98 | $98,00 |
| 500 | $0.83 | $415,00 |
| 1 000 | $0.74 | $740,00 |
| 3 000 | $0.62 | $1 860,00 |
MBRB1045HM3/I Présentation
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.
Alternatives de remplacement direct pour MBRB1045HM3/I — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MBRB1035HM3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
VS-MBRB1045HM3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
VS-MBRB1045-M3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MBRB2545CT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SBR10U45P1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MBRB1045
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MBRB1045HM3/I Valeurs maximales et caractéristiques électriques
| 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 |
| Plage de température de jonction en fonctionnement | -40 C to +150 C |
| Boîtier | TO-263AB (D2PAK) surface mount, 2 leads + tab |
| Type de montage | Surface Mount |
| Configuration | Single (1 diode) |
| Sans halogène | Yes |
| Lead-Free / RoHS Status | Yes - RoHS compliant |
Configuration des broches de MBRB1045HM3/I
| Broche 1 | Anode — Anode lead (positive terminal of the Schottky rectifier) |
| Broche 2 | Cathode — Cathode lead (negative terminal), internally connected to the mounting tab |
| Broche 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)
Applications typiques
MBRB1045HM3/I convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MBRB1045HM3/I — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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) |
Principaux différenciateurs
- Drop-in compatible with 35 V MBRB1035HM3 (same die, same package) (vs MBRB1035HM3)
- Cross-brand compatibility with Diodes Incorporated SBR family (vs SBR10U45P1)
- High-performance Schottky with low leakage at high temperature (vs VS-MBRB1045HM3)
Notes de conception
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.
Informations de conformité
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).
