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Diodes Incorporated SBR20A45D1-13
- Part No.:
- SBR20A45D1-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
SBR20A45D1-13.pdf
- Description:
- DIODE SBR 45V 20A TO252
- Quantity:
- Payment:
- Shipping:
Inventory:4,978
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Product details
Overview
SBR20A45D1-13 from Diodes Incorporated is a 20A, 45V Super Barrier Rectifier (SBR®) optimized for high-efficiency DC-DC converters and switching power supplies. It delivers ultra-low forward voltage (0.59 V max at 20 A, 25°C), low leakage current (0.5 mA max at 45 V, 25°C), and operates up to +175°C junction temperature - enabling compact, thermally robust designs in server VRMs and telecom rectifiers.
For engineers reviewing the SBR20A45D1-13 datasheet, SBR20A45D1-13 pinout, SBR20A45D1-13 application, or SBR20A45D1-13 equivalent, key selection criteria include forward voltage vs. temperature stability, surge current rating (140 A IFSM), TO252 thermal resistance (RθJC = 2.5°C/W), and RoHS/Green compliance for industrial and telecom deployments.
Technical Context
This SBR device replaces conventional Schottky and fast recovery diodes in medium-power SMPS outputs by combining low VF with soft reverse recovery - reducing EMI and eliminating snubber circuits. Its patented Super Barrier structure achieves lower conduction loss than standard Schottkys while maintaining superior high-temperature IR stability.
The TO252 (DPAK) package enables surface-mount assembly with direct heatsink attachment via the exposed cathode tab. Thermal resistance from junction to case is 2.5°C/W under standard test conditions, supporting high-current operation without forced air cooling in space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 48V bus applications. |
| IO (AV) | 20 A - Average rectified output current at TA = 25°C; derates linearly above 25°C per Figure 4. |
| VF (max) | 0.59 V @ 20 A, 25°C - Enables <1.2 W conduction loss per diode at full load, critical for >95% efficiency designs. |
| IR (max) | 0.50 mA @ 45 V, 25°C - Low leakage preserves efficiency in standby modes and high-temperature operation. |
| IFSM | 140 A @ 8.3 ms - Withstands inrush and transient surges common in hot-plug and PFC-stage outputs. |
| TJ Range | –55°C to +175°C - Supports operation in automotive under-hood, industrial motor drives, and base station power modules. |
| RθJC | 2.5°C/W - Enables direct thermal coupling to heatsinks; allows >15 W dissipation with 37.5°C ΔT to case. |
Pinout & Package
Package: TO252 (DPAK), surface-mount, with exposed cathode pad for thermal and electrical connection. Dimensions per Diodes Inc. outline DS39370 Rev.3: 6.10 × 6.58 × 1.59 mm (L × W × H), weight ≈ 0.4 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Anode connection | Input terminal for forward conduction; connects to switching node or transformer secondary. |
| Pin 2 (Cathode) | Cathode connection | Output terminal; electrically and thermally tied to large exposed metal tab on underside of package. |
| Pin 3 (Tab / Cathode) | Common cathode / thermal pad | Primary heat path to PCB copper pour or heatsink; must be soldered for rated current and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF | 0.41 V typ @ 10 A, 25°C - Reduces conduction loss by ≥30% vs. comparable 45V Schottkys, directly improving system efficiency. |
| Soft switching | No hard reverse recovery snap-off - eliminates voltage spikes and reduces EMI filtering requirements in high-frequency converters. |
| High-temp IR stability | 40 mA max IR @ 45 V, 125°C - Maintains low leakage under thermal stress, avoiding runaway in parallel configurations. |
| Green construction | Halogen- and antimony-free, RoHS-compliant molding compound (UL 94V-0) - meets IPC-1752a environmental reporting and OEM sustainability mandates. |
Applications
| Server VRM Output Rectification | Telecom 48V DC-DC Converter |
|---|---|
Use Scenario: High-current, high-efficiency 12V/5V point-of-load regulation in cloud server motherboards. IC Role / Device Role / Timing Role: Primary synchronous rectifier replacement; conducts during low-side MOSFET on-time in buck topology. Use Value: 0.59 V VF at 20 A lowers conduction loss by ~0.8 W vs. legacy Schottky, reducing local hotspot temperature rise by >15°C. | Use Scenario: Secondary-side rectification in isolated 48V-to-12V telecom power modules. IC Role / Device Role / Timing Role: Freewheeling diode in active-clamp forward or LLC resonant converter outputs. Use Value: Soft recovery behavior suppresses ringing across transformer leakage inductance, easing EMI filter design and passing CISPR-22 Class B. |
| Industrial Motor Drive Power Supply | Automotive ADAS Camera Power Module |
Use Scenario: Auxiliary 24V supply for PLC I/O modules operating in ambient up to +85°C. IC Role / Device Role / Timing Role: Output rectifier in flyback-derived auxiliary supply with wide input range (85–265 VAC). Use Value: 175°C max TJ and stable IR up to 125°C enable reliable operation without derating in sealed enclosures. | Use Scenario: Compact 12V-to-3.3V buck converter powering image sensor and ISP in rear-view camera modules. IC Role / Device Role / Timing Role: Synchronous rectifier in high-frequency (500 kHz) buck stage where size and thermal density are critical. Use Value: TO252 footprint and 0.4 g mass support ultra-thin mechanical profiles; green material satisfies automotive ELV directive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT20A45CT-13 | Dual common-cathode configuration (2×10A); VF slightly higher (0.61 V max @ 10 A). | Requires dual-output or interleaved topologies; not drop-in for single-anode designs. | Select when designing dual-rail outputs or need shared cathode layout simplification. |
| MBR2045CTG | Standard Schottky; VF = 0.75 V max @ 20 A; IR = 1.0 mA @ 45 V, 25°C; no soft recovery. | Higher conduction loss and EMI risk limit use to lower-frequency (<100 kHz) or cost-sensitive non-telecom applications. | Choose only if thermal budget allows +3.2 W extra loss and EMI filtering headroom exists. |
Compared with SBRT20A45CT-13 and MBR2045CTG, the SBR20A45D1-13 provides the lowest VF among TO252 45V rectifiers with verified soft switching - making it optimal for high-frequency, high-efficiency, and thermally constrained applications where both loss and EMI must be minimized.
Availability
SBR20A45D1-13 is available at Aetrix Electronics and suitable for server VRMs, telecom DC-DC converters, and industrial motor drive auxiliary supplies requiring stable component supply, long-term lifecycle assurance, and RoHS/Green compliance.
Supply support for SBR20A45D1-13 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The SBR® Super Barrier Rectifier product line targets high-efficiency power conversion in computing, communications, and industrial systems - delivering Schottky-like VF with improved thermal stability and reduced EMI over conventional alternatives.
FAQ
What is the maximum recommended PCB copper area for thermal relief with SBR20A45D1-13?
Per Diodes Inc. thermal test condition (Note 5), a 2-inch × 2-inch Al board with 50 mm × 50 mm × 23 mm heatsink achieves RθJA = 15°C/W. For standalone PCB mounting, ≥400 mm² of 2-oz copper connected to the cathode tab is recommended to maintain RθJA ≤ 35°C/W at 20 A continuous.
Does SBR20A45D1-13 support paralleling for higher current?
Yes - its positive temperature coefficient of VF ensures inherent current sharing. At 125°C, VF increases by ~0.1 V vs. 25°C, promoting balanced conduction. Use matched layout symmetry and Kelvin sensing for best results; avoid paralleling with Schottky diodes due to differing thermal coefficients.
Is the TO252 package lead (Pb)-free and compatible with lead-free reflow profiles?
Yes - the device uses matte tin-finish terminals over copper leadframe and is qualified for Pb-free reflow per JEDEC J-STD-020. Peak temperature tolerance is 260°C for 30 seconds; moisture sensitivity level is MSL1, allowing unlimited floor life before reflow.
How does SBR20A45D1-13 perform under capacitive load conditions?
Diodes Inc. specifies a 20% IO derating for capacitive loads. At 20 A rated current, limit average forward current to 16 A when driving bulk capacitance directly - due to higher peak charging currents that increase localized heating and reduce reliability margin under repeated cold-start cycles.
SBR20A45D1-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- SBR®
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Super Barrier
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 590 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252 (DPAK)
- Operating Temperature - Junction:
- -55°C ~ 175°C
SBR20A45D1-13 FAQ
1.How can I place an order for SBR20A45D1-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR20A45D1-13 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 SBR20A45D1-13 reliable?
The price and inventory of SBR20A45D1-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR20A45D1-13 is usually 5 days.
3.What payment methods are accepted for SBR20A45D1-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR20A45D1-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR20A45D1-13?
SBR20A45D1-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR20A45D1-13 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 SBR20A45D1-13?
For technical support, including SBR20A45D1-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR20A45D1-13 requirements.
6.How does Aetrix verify that SBR20A45D1-13 is sourced from the original manufacturer or authorized distributors?
All SBR20A45D1-13 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 SBR20A45D1-13 meets industry standards.
7.What is the process for return or replacement of SBR20A45D1-13?
All SBR20A45D1-13 units undergo pre-shipment inspection (PSI). If there is an issue with SBR20A45D1-13, 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 SBR20A45D1-13 part is unused and in its original packaging.
Return procedure for SBR20A45D1-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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