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Vishay General Semiconductor - Diodes Division MBRB1645HE3_B/P
- Part No.:
- MBRB1645HE3_B/P
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRB1645HE3_B/P.pdf
- Description:
- DIODE SCHOTTKY 45V 16A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,960
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Product details
Overview
MBRB1645HE3_B/P from Vishay General Semiconductor is a Schottky barrier rectifier in D2PAK (TO-263AB) package, rated for 16 A average forward current, 45 V repetitive peak reverse voltage, and 150 A surge capability at 8.3 ms. It delivers low 0.57 V forward voltage at 16 A and 125 °C, enabling high-efficiency DC/DC conversion and freewheeling in automotive-grade power supplies.
For engineers reviewing the MBRB1645HE3_B/P datasheet, MBRB1645HE3_B/P pinout, MBRB1645HE3_B/P application, or MBRB1645HE3_B/P equivalent, key selection criteria include junction-to-case thermal resistance (1.5 °C/W), AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and guardring-enabled overvoltage protection in high-frequency switching environments.
Technical Context
This device implements a single-die Schottky barrier structure with integrated guardring for enhanced transient overvoltage robustness. Its low VF and high IFSM support high-efficiency synchronous rectification in 48 V–12 V DC/DC stages and polarity protection circuits where fast recovery and minimal conduction loss are critical.
The D2PAK package provides direct heatsink mounting via the exposed cathode tab (Pin 3), enabling effective thermal management under sustained 16 A loads. Junction temperature is rated to +150 °C, with thermal resistance RθJC = 1.5 °C/W confirming suitability for thermally constrained automotive and industrial power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 16 A average forward current - supports continuous operation in high-current DC/DC converters without forced air cooling |
| VRRM | 45 V repetitive peak reverse voltage - suitable for 36 V nominal input systems with 20 % margin |
| VF @ 16 A, 125 °C | 0.57 V - reduces conduction loss by ~30 % vs. comparable silicon diodes, improving system efficiency |
| IFSM (8.3 ms) | 150 A non-repetitive surge - withstands inrush and fault currents in automotive load-dump scenarios |
| RθJC | 1.5 °C/W - enables >10 W power dissipation with ≤15 °C rise above heatsink temperature |
| TJ max. | +150 °C - qualified for under-hood automotive applications per AEC-Q101 requirements |
Pinout & Package
Package: D2PAK (TO-263AB) with exposed cathode tab (Pin 3) for direct heatsink mounting; matte tin-plated leads compliant with J-STD-002 solderability and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Anode connection | Input terminal for forward current flow; connects to switching node in buck/flyback topologies |
| Pin 2 (Cathode) | Cathode connection | Output terminal; electrically tied to exposed metal tab (Pin 3) for low-inductance, high-current return path |
| Pin 3 (Heatsink / Cathode Tab) | Thermal & electrical cathode | Provides primary thermal conduction path to PCB heatsink; must be electrically connected to cathode net |
Key Features
| Feature | Design Value |
|---|---|
| Guardring overvoltage protection | Prevents premature avalanche breakdown during line transients, extending reliability in 12 V/24 V automotive systems |
| MSL Level 1 (245 °C peak) | Enables standard lead-free reflow without baking or special handling prior to assembly |
| AEC-Q101 qualified variant available | Validated for automotive use including temperature cycling, HTRB, and ESD testing per stress test plan |
| Low dV/dt rating (10,000 V/μs) | Suppresses false triggering in high-di/dt environments such as motor drive freewheeling paths |
Applications
| Automotive DC/DC Converter | Industrial SMPS Output Rectification |
|---|---|
Use Scenario: Step-down conversion from 48 V battery to 12 V auxiliary rail in ADAS domain controllers. IC Role / Device Role / Timing Role: Synchronous rectifier replacing MOSFET gate driver + FET pair in secondary-side regulation. Use Value: 0.57 V VF at 125 °C reduces conduction loss by 1.8 W vs. Si diode, lowering thermal design burden in sealed enclosures. | Use Scenario: Output rectification in 500 W telecom power supply with 36 V input and 5 V/50 A output. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter operating at 300 kHz. Use Value: 150 A IFSM handles startup surges without derating; 1.5 °C/W RθJC allows passive heatsinking on 2 oz copper layer. |
| Polarity Protection Circuit | Server PSU OR-ing Diode |
Use Scenario: Reverse-voltage protection at main 24 V input of programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Series-blocking diode preventing damage from accidental battery reversal during field maintenance. Use Value: 45 V VRRM provides 25 % margin over 24 V nominal; guardring ensures robustness against 100 V load-dump transients. | Use Scenario: OR-ing function in redundant 12 V server power distribution unit with hot-swap capability. IC Role / Device Role / Timing Role: Low-loss forward path enabling seamless switchover between dual PSUs without voltage droop. Use Value: 0.57 V VF minimizes voltage drop across diode, preserving <10 mV output regulation error at full 40 A load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1645CGY-TR | Same 16 A / 45 V rating; VF = 0.62 V @ 16 A, 125 °C; TO-252 package (DPAK), no exposed heatsink tab | Limited thermal performance (RθJC ≈ 3.0 °C/W); unsuitable for >10 A continuous without active cooling | Select when board space is constrained and power dissipation ≤8 W; avoid in automotive under-hood locations |
| ON Semi MBR1645CT | 16 A / 45 V dual common-cathode configuration; VF = 0.60 V @ 16 A, 125 °C; TO-220AC package | Requires two devices for single-channel use; larger footprint and higher thermal resistance (RθJC = 2.5 °C/W) | Choose only if dual-output topology or legacy TO-220 mounting is required; inferior thermal performance vs. MBRB1645HE3_B/P |
Compared with STPS1645CGY-TR and MBR1645CT, the MBRB1645HE3_B/P offers superior thermal management via its D2PAK heatsink tab and lower VF, making it the preferred choice for high-reliability, high-power-density automotive and industrial rectification where junction temperature control is critical.
Availability
MBRB1645HE3_B/P is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS output rectification, and polarity protection applications requiring stable component supply, AEC-Q101 traceability, and long-term lifecycle support.
Supply support for MBRB1645HE3_B/P 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, power efficiency, and automotive qualification.
The MBRB16xx family was designed specifically for high-current, high-frequency rectification in automotive and industrial power systems, prioritizing low VF, robust surge capability, and AEC-Q101 compliance from wafer to final test.
FAQ
Is MBRB1645HE3_B/P AEC-Q101 qualified?
No - MBRB1645HE3_B/P is not AEC-Q101 qualified. The AEC-Q101 variant carries the HM3 suffix (e.g., MBRB1645HM3/I). MBRB1645HE3_B/P is commercial-grade with M3 suffix, RoHS-compliant and halogen-free, but lacks the extended stress testing required for automotive qualification. For automotive designs, specify MBRB1645HM3/I instead of MBRB1645HE3_B/P.
What is the pin configuration of MBRB1645HE3_B/P?
MBRB1645HE3_B/P uses a 3-terminal D2PAK (TO-263AB) package: Pin 1 is the anode, Pin 2 is the cathode, and the exposed metal tab (Pin 3) is electrically and thermally connected to the cathode. This configuration enables low-inductance, high-current return paths and direct heatsink mounting - critical for maintaining TJ ≤ 150 °C under 16 A continuous load in MBRB1645HE3_B/P applications.
What does the "HE3_B/P" suffix indicate in MBRB1645HE3_B/P?
The "HE3_B/P" suffix denotes tape-and-reel packaging (HE3), RoHS-compliant and halogen-free materials (B), and Vishay's proprietary packaging process (P). It corresponds to the base ordering code MBRB1645-M3/I, confirming commercial-grade qualification, J-STD-020 MSL Level 1 rating, and compatibility with standard lead-free reflow profiles - all verified for MBRB1645HE3_B/P in production documentation.
Can MBRB1645HE3_B/P replace MBRB1645-M3/I?
Yes - MBRB1645HE3_B/P is functionally and mechanically identical to MBRB1645-M3/I. Both share the same D2PAK package, electrical specifications (16 A IF(AV), 45 V VRRM, 0.57 V VF @ 125 °C), thermal characteristics (RθJC = 1.5 °C/W), and RoHS/halogen-free compliance. The HE3_B/P designation reflects updated packaging nomenclature; no design or layout changes are needed when substituting MBRB1645HE3_B/P for MBRB1645-M3/I.
What is the maximum operating temperature for MBRB1645HE3_B/P?
The maximum operating junction temperature for MBRB1645HE3_B/P is +150 °C, validated per JEDEC standards. This rating applies under conditions where case temperature (TC) is maintained ≤125 °C at 16 A average forward current. Thermal design must ensure RθJA remains within limits to prevent exceeding TJ max.; the 1.5 °C/W RθJC value of MBRB1645HE3_B/P enables this with appropriate heatsinking.
MBRB1645HE3_B/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 630 mV @ 16 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB
- Operating Temperature - Junction:
- -65°C ~ 150°C
MBRB1645HE3_B/P FAQ
1.How can I place an order for MBRB1645HE3_B/P through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRB1645HE3_B/P 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 MBRB1645HE3_B/P reliable?
The price and inventory of MBRB1645HE3_B/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRB1645HE3_B/P is usually 5 days.
3.What payment methods are accepted for MBRB1645HE3_B/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRB1645HE3_B/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRB1645HE3_B/P?
MBRB1645HE3_B/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRB1645HE3_B/P 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 MBRB1645HE3_B/P?
For technical support, including MBRB1645HE3_B/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRB1645HE3_B/P requirements.
6.How does Aetrix verify that MBRB1645HE3_B/P is sourced from the original manufacturer or authorized distributors?
All MBRB1645HE3_B/P 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 MBRB1645HE3_B/P meets industry standards.
7.What is the process for return or replacement of MBRB1645HE3_B/P?
All MBRB1645HE3_B/P units undergo pre-shipment inspection (PSI). If there is an issue with MBRB1645HE3_B/P, 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 MBRB1645HE3_B/P part is unused and in its original packaging.
Return procedure for MBRB1645HE3_B/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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