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Diodes Incorporated MBRD835L-T
- Part No.:
- MBRD835L-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MBRD835L-T.pdf
- Description:
- DIODE SCHOTTKY 35V 8A TO252
- Quantity:
- Payment:
- Shipping:
Inventory:8,112
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Product details
Overview
MBRD835L-T from Diodes Incorporated is an 8A, 35V low-forward-voltage Schottky barrier rectifier in DPAK (TO-252) package, featuring 0.48V typical VF at 8A/25°C, 6.0°C/W junction-to-case thermal resistance, and guard-ring die construction for transient protection - used in DC-DC converter output rectification, reverse polarity protection, and freewheeling diode applications.
For engineers reviewing the MBRD835L-T datasheet, MBRD835L-T pinout, MBRD835L-T application, or MBRD835L-T equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance under PCB-mounted conditions, surge current capability (75A IFSM), and derating behavior for capacitive loads and elevated case temperatures.
Technical Context
This Schottky rectifier employs a planar, guard-ringed silicon die optimized for low conduction loss and fast switching with no minority-carrier storage delay. Its DPAK package enables direct heatsinking via Pin 1 & 3 connection to a large copper pad (14 mm², 0.013 mm thick), supporting 8A average forward current at TC = 88°C.
Electrical performance is characterized at 25°C and 125°C junction temperature, with specified VF shift (0.41V @ 125°C), IR increase (1.4 mA @ 100°C), and Cj = 600 pF @ 4V - confirming suitability for high-frequency (<1 MHz) switching topologies where low recovery loss and predictable capacitance are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 35 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking range in 24V/32V bus systems. |
| IF(AV) | 8 A @ TC = 88°C - Sustained DC output current capability when mounted on recommended PCB copper area. |
| VF | 0.48 V typ @ 8A, 25°C - Directly reduces conduction loss in high-current paths; drops to 0.41V at 125°C. |
| IFSM | 75 A @ 8.3 ms half-sine - Withstands inrush and short-circuit surge without failure under JEDEC test conditions. |
| RJC | 6.0 °C/W - Enables precise junction temperature estimation when heatsink path is defined via PCB copper. |
| Cj | 600 pF @ 1 MHz, 4V - Limits high-frequency displacement current; impacts EMI and snubber design in SMPS. |
Pinout & Package
DPAK (TO-252) surface-mount package with exposed heat sink tab (Pin 4). Pins 1 and 3 must be electrically connected on PCB for optimal thermal and current sharing. Case material meets UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Main current entry point; requires low-impedance connection to source node and shared with Pin 3 for thermal uniformity. |
| Pin 2 | Cathode | Current exit terminal; connects to output rail or ground return; carries full load current. |
| Pin 3 | Anode (tie point) | Secondary anode connection; must be shorted to Pin 1 on PCB to reduce parasitic inductance and improve thermal spreading. |
| Pin 4 | Exposed Heat Sink Tab | Thermal interface to PCB copper; not electrically isolated - must be connected to cathode or ground plane per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Guard-ring die construction | Improves ruggedness against voltage transients and prevents edge breakdown during reverse-biased operation. |
| Low VF (0.48V @ 8A) | Reduces power loss by >30% vs. standard PN rectifiers at same current, lowering thermal stress in compact layouts. |
| 75A non-repetitive surge rating | Supports reliable operation during cold-start, hot-swap, or fault events without bond-wire fusing. |
| 6.0°C/W RJC | Enables accurate thermal modeling when using 14 mm² copper pad; allows 8A continuous current at 88°C case temp. |
Applications
| DC-DC Converter Output Rectification | Reverse Polarity Protection |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in 12V–24V input buck converters delivering up to 8A. IC Role / Device Role / Timing Role: Uncontrolled rectifier conducting only during positive half-cycle of transformer secondary voltage. Use Value: 0.48V VF minimizes conduction loss at high duty cycles, improving efficiency over Si PN alternatives. | Use Scenario: Series-connected protection in automotive infotainment power inputs exposed to accidental battery reversal. IC Role / Device Role / Timing Role: Forward-conducting anode-to-cathode path during correct polarity; blocks reverse current during miswiring. Use Value: Low VF ensures <1V drop at full load, preserving system voltage margin while surviving 75A surge. |
| Freewheeling Diode in Motor Drivers | High-Frequency Inverter Freewheel Path |
Use Scenario: Clamp path for inductive kickback in 24V brushed DC motor H-bridge drivers operating at ≤20 kHz PWM. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during MOSFET off-time; zero reverse recovery charge. Use Value: Absence of Qrr eliminates switching loss and EMI spikes associated with PN diodes. | Use Scenario: Output stage clamp in 100 kHz resonant LLC inverters powering LED arrays or industrial sensors. IC Role / Device Role / Timing Role: Conducts high di/dt freewheel current with minimal voltage overshoot due to low inductance layout and low VF. Use Value: 600 pF junction capacitance remains stable up to 4V reverse bias, enabling predictable snubber tuning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS835D | Same 35V VRRM, 8A IF(AV), but TO-252-2L (2-pin) package; no Pin 3 tie requirement. | Lacks dual-anode configuration; lower thermal spreading capability (RJC = 7.5°C/W). | Prefer when simplified layout and reduced PCB routing complexity outweigh thermal margin needs. |
| SS8P3L | 35V, 8A, DPAK-3L, but higher VF (0.55V typ @ 8A) and lower IFSM (60A). | Higher conduction loss increases thermal load; less robust for surge-intensive environments. | Select only if cost sensitivity dominates and peak surge events are absent or externally clamped. |
Compared with STPS835D and SS8P3L, the MBRD835L-T delivers superior thermal performance via its dual-anode DPAK layout and lowest VF, making it optimal for space-constrained, thermally demanding 8A rectification where reliability under surge and elevated temperature is critical.
Availability
MBRD835L-T is available at Aetrix Electronics and suitable for DC-DC converter output rectification, reverse polarity protection, and freewheeling diode applications requiring stable component supply across automotive, industrial control, and embedded power designs.
Supply support for MBRD835L-T 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, specializing in high-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.
The MBRD835L-T belongs to Diodes' low-VF Schottky rectifier product line, engineered for high-current, high-frequency power conversion where minimizing conduction loss and thermal resistance is essential.
FAQ
What is the correct PCB layout practice for Pins 1 and 3?
Pins 1 and 3 must be electrically shorted together on the PCB using a low-impedance copper trace or polygon pour. This ensures balanced current distribution and optimal thermal spreading across both anode terminals, reducing localized heating and improving long-term reliability under 8A load.
Can MBRD835L-T be used in capacitive-input filter applications?
Yes, but with 20% current derating applied - limiting IF(AV) to 6.4A when used with capacitive loads. This accounts for increased peak current stress caused by the narrow conduction angle, as specified in the datasheet's application note section.
Is the exposed tab (Pin 4) electrically isolated?
No - the exposed heat sink tab is internally connected to the cathode (Pin 2). It must be routed to the same net as the cathode and cannot be used as a floating thermal pad; isolation requires insulating thermal interface materials and careful clearance design.
How does junction temperature affect forward voltage?
VF decreases with rising junction temperature: from 0.48V at 25°C to 0.41V at 125°C at 8A. This negative temperature coefficient improves current sharing in parallel configurations but requires thermal design to stay within the -65°C to +125°C operating range.
MBRD835L-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 35 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 510 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1.4 mA @ 35 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252 (DPAK)
- Operating Temperature - Junction:
- -65°C ~ 125°C
MBRD835L-T FAQ
1.How can I place an order for MBRD835L-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRD835L-T 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 MBRD835L-T reliable?
The price and inventory of MBRD835L-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRD835L-T is usually 5 days.
3.What payment methods are accepted for MBRD835L-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRD835L-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRD835L-T?
MBRD835L-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRD835L-T 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 MBRD835L-T?
For technical support, including MBRD835L-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRD835L-T requirements.
6.How does Aetrix verify that MBRD835L-T is sourced from the original manufacturer or authorized distributors?
All MBRD835L-T 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 MBRD835L-T meets industry standards.
7.What is the process for return or replacement of MBRD835L-T?
All MBRD835L-T units undergo pre-shipment inspection (PSI). If there is an issue with MBRD835L-T, 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 MBRD835L-T part is unused and in its original packaging.
Return procedure for MBRD835L-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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