VS-MBRS320TRPBF - 3A 20V Schottky Rectifier DO-214AA | Vishay
MPN: VS-MBRS320TRPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.52 | $5.20 |
| 100 | $0.41 | $41.00 |
| 500 | $0.34 | $170.00 |
| 1,000 | $0.28 | $280.00 |
| 3,000 | $0.22 | $660.00 |
VS-MBRS320TRPBF Overview
A Schottky rectifier is a majority-carrier diode built from a metal-semiconductor junction rather than a PN junction. This construction eliminates minority-carrier storage charge, so the device switches almost instantaneously with no reverse-recovery time. As a result, Schottky rectifiers are preferred over standard recovery rectifiers in high-frequency switch-mode power supplies, where switching losses and reverse-recovery transients directly erode efficiency. The MBRS320 family sits within Vishay's broader discrete-semiconductor Schottky portfolio aimed at compact, surface-mount power conversion.
Key electrical characteristics include a 3.0 A average rectified forward current, 0.36 V maximum forward voltage at rated current, low reverse leakage, and a wide operating junction temperature range suitable for thermally constrained layouts. The SMB (DO-214AA) outline provides an exposed metal pad that doubles as the cathode terminal, enabling low-resistance PCB soldering and direct thermal conduction into the copper land. The tape-and-reel (TRPBF) suffix indicates Pb-free, RoHS-compliant packaging on a 7-inch or 13-inch reel ready for high-volume SMT lines.
Typical applications include OR-ing diodes in redundant power architectures, freewheeling diodes across inductive loads such as relays and motor windings, switch-mode power-supply secondary-side rectifiers, reverse-polarity protection on DC inputs, and low-voltage DC-DC converters in industrial, automotive, and telecom equipment. Designers select the MBRS320 for its balance of low forward drop, low leakage, and compact surface-mount footprint.
When designing with this part, observe the derating curve of average forward current versus temperature. Thermal management via copper land area is critical: the SMB cathode pad must be soldered to a sufficiently large land to keep junction temperature below the maximum rating under full load. Avoid exceeding the VRRM, and pair the rectifier with adequate heat-sinking where continuous high-current operation is expected.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement and design engineers a single decision-ready reference for the VS-MBRS320TRPBF.
Drop-in alternatives for VS-MBRS320TRPBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
VS-MBRS320TRPBF
✅ Drop-In✓ In Stock
$0.22 / Unit
View Datasheet →SS32
✅ Drop-In📋 Reference alternative (not in catalog)
B320-13-F
✅ Drop-In📋 Reference alternative (not in catalog)
SK32
✅ Drop-In📋 Reference alternative (not in catalog)
NRVBS320
✅ Drop-In📋 Reference alternative (not in catalog)
MBRS320
✅ Drop-In📋 Reference alternative (not in catalog)
VS-MBRS320TRPBF Maximum Ratings & Electrical Characteristics
| Rectifier Type | Schottky |
| Configuration | Single |
| Repetitive Peak Reverse Voltage (VRRM) | 20 V |
| Average Rectified Forward Current (IF(AV)) | 3.0 A |
| Maximum Forward Voltage (VF) at IF=3A | 0.36 V |
| Operating Junction Temperature Range | -65 C to +150 C |
| Package / Case | DO-214AA (SMB) |
| Mounting Type | Surface Mount |
| Number of Terminals | 2 |
| Terminal Form | C BEND |
| Package Shape | Rectangular |
| Diode Element Material | Silicon (Schottky metal-semiconductor junction) |
| RoHS Status | Compliant (Pb-free TRPBF suffix) |
| Packaging | Tape & Reel (TRPBF) |
VS-MBRS320TRPBF Pin Configuration
| Pin 1 | Anode (A) — Anode terminal of the Schottky rectifier (forward-biased input) |
| Pin 2 | Cathode (K) — Cathode terminal / exposed metal pad, doubles as thermal pad (soldered to PCB land for heat sinking) |
Forward Current vs Forward Voltage (typical)
Typical Applications
VS-MBRS320TRPBF is suitable for 6 applications: Switch-Mode Power Supply Secondary Rectifier, Freewheeling Diode for Inductive Loads, Reverse-Polarity Protection on DC Inputs, OR-ing Diode in Redundant Power Architectures, Low-Voltage DC-DC Converter Rectifier, Automotive 12V Bus Clamping and Protection.
Switch-Mode Power Supply Secondary Rectifier
The VS-MBRS320TRPBF is a strong fit for secondary-side rectification in 12 V and 5 V switch-mode power supplies. Its 20 V VRRM comfortably exceeds the reflected secondary voltage of typical 12 V flyback or forward converters, and the 0.36 V forward drop at 3 A keeps conduction loss near 1.08 W. Because Schottky rectifiers carry no minority-carrier storage charge, reverse-recovery losses and secondary-side ringing are essentially eliminated compared with PN-junction rectifiers - a measurable benefit at switching frequencies above 100 kHz where trr losses would otherwise dominate efficiency budgets.
Recommended
Freewheeling Diode for Inductive Loads
Across relays, solenoids, motor windings, and small inductors, the VS-MBRS320TRPBF acts as a freewheeling (snubber) diode to safely commutate stored inductive energy when the switch opens. Its 20 V reverse rating covers most 12 V and 24 V coil systems, and the 3 A rating tolerates the brief flyback current pulse typical of relay and small-motor demagnetization. The Schottky construction means no reverse-recovery spike, reducing EMI and protecting driver transistors from voltage transients. SMB footprint keeps the diode compact next to the inductor or relay footprint.
Recommended
Reverse-Polarity Protection on DC Inputs
At the input of a 12 V or 5 V DC-powered system, the VS-MBRS320TRPBF provides robust reverse-polarity protection when placed in series with the supply rail. Its 20 V VRRM absorbs the reversed supply without avalanche, while the 0.36 V forward drop at 3 A introduces only ~1 W of series loss at full load - acceptable in most 12 V systems where post-regulation still leaves headroom. Compared to a P-channel MOSFET ideal-diode, the Schottky approach is cheaper and simpler, at the cost of a small efficiency penalty. The SMB footprint is well-suited to through-hole DC jack and terminal-block input sections.
Recommended
OR-ing Diode in Redundant Power Architectures
In systems with two redundant DC sources (e.g., main supply plus battery backup), the VS-MBRS320TRPBF serves as an OR-ing diode at each input before the common bus. The 20 V VRRM accommodates 12 V nominal rails, and the low forward drop minimizes the voltage drop between sources and the load - critical when redundant sources must share load current efficiently. Compared with ideal-diode controllers, a Schottky-based OR-ing solution is simpler and lower cost, accepting the small VF penalty in exchange for zero quiescent current and immediate response to source failover.
Recommended
Low-Voltage DC-DC Converter Rectifier
In low-voltage buck-derived or boost-derived DC-DC converter modules, the VS-MBRS320TRPBF can be used at the output rectification stage for currents up to 3 A. The 20 V reverse rating covers outputs from 1 V up to about 18 V, which encompasses most point-of-load and intermediate bus voltages in industrial and telecom equipment. Schottky construction enables clean switching at converter frequencies of 200 kHz to 1 MHz without the reverse-recovery losses that plague PN-junction rectifiers, helping maintain high converter efficiency at high step-down ratios.
Recommended
Automotive 12V Bus Clamping and Protection
Although the MBRS320 family is not AEC-Q101 qualified, the VS-MBRS320TRPBF can serve as a clamp or catch diode in non-safety automotive subsystems where 12 V bus protection is needed. Its 20 V VRRM sits above the 12 V nominal rail with margin for load-dump transients (with external TVS clamping) and reverse-battery events (with proper fusing). The SMB footprint and 3 A continuous rating suit accessory loads such as interior lighting drivers, HVAC actuators, and infotainment power conditioning where cost-sensitive protection is required.
Recommended
Recommended Products Summary
Engineering reference data for VS-MBRS320TRPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SS32 | B320-13-F | SK32 | NRVBS320 | MBRS320 |
|---|---|---|---|---|---|---|
| Package | DO-214AA (SMB) | DO-214AA (SMB) | DO-214AA (SMB) | DO-214AB (SMC) - larger | DO-214AA (SMB) | DO-214AA (SMB) |
| Brand | Vishay Intertechnology | Taiwan Semiconductor | Diodes Incorporated | Micro Commercial Components | ON Semiconductor | ON Semiconductor |
| Repetitive Peak Reverse Voltage (VRRM) | 20 V | 20 V | 20 V | 20 V | 20 V | 20 V |
| Average Rectified Forward Current (IF(AV)) | 3.0 A | 3.0 A | 3.0 A | 3.0 A | 3.0 A | 3.0 A |
| Rectifier Type | Schottky | Schottky | Schottky | Schottky | Schottky | Schottky |
| Operating Junction Temperature | -65 C to +150 C | -55 C to +150 C | -55 C to +150 C | -55 C to +150 C | -55 C to +150 C | -55 C to +150 C |
| RoHS / Pb-free | Yes (PBF suffix) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Tighter maximum forward-voltage spec at 3 A (vs SS32)
- Single DO-214AA (SMB) footprint for full 20 V/3 A drop-in compatibility (vs SK32 (DO-214AB/SMC))
- Pb-free / RoHS compliant with explicit PBF suffix (vs Legacy MBRS320 variants)
Design Notes
Estimated: at 3 A continuous forward current and 0.36 V forward drop, the VS-MBRS320TRPBF dissipates roughly 1.08 W. The DO-214AA (SMB) package relies on the PCB copper land (cathode pad) for thermal dissipation - a minimum of 1 square inch (645 mm^2) of 2 oz copper is recommended to keep the junction temperature rise under 50 C above ambient. Without adequate copper, the device will thermally derate well below the rated 3 A continuous current, especially in still air. For continuous 3 A operation, ensure at least 1.5 square inches of 2 oz copper and consider forced airflow in enclosed chassis.
Solder the cathode pad (pin 2) to a continuous copper land that doubles as both electrical return and thermal path. Avoid thermal vias directly under the pad unless they are filled and capped, as voids in the solder joint increase thermal resistance. Keep the anode trace (pin 1) wide enough to carry 3 A continuous - 30 mil (0.75 mm) minimum trace width on 1 oz copper is a starting point. Place the diode near the inductor or switching node to minimize parasitic inductance in the commutation loop, which is critical for high-frequency SMPS applications to reduce voltage overshoot and ringing.
Do not exceed the 20 V VRRM rating - even brief excursions above this value can cause avalanche breakdown and catastrophic failure. For 12 V rails with load-dump transients (automotive) or inductive kickback (relay coils), add a TVS diode or RC snubber in parallel with the rectifier to clamp transients. Also avoid paralleling two MBRS320 devices without derating: Schottky diodes have positive temperature coefficients on forward voltage, so paralleling does not naturally balance current the way it does for MOSFETs. If higher current is needed, step up to a 5 A or 8 A single device instead of paralleling.
Compliance Information
PBF suffix indicates Pb-free plating and RoHS compliance per Vishay naming convention. Not AEC-Q100/AEC-Q101 qualified - for automotive safety applications, select an AEC-Q101-qualified alternative. Storage temperature range and reverse-recovery time not specified in verified web data - see [DATA_NEEDED] markers in specs array.
