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Diodes Incorporated SBR12A45SP5-13
- Part No.:
- SBR12A45SP5-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- PowerDI™ 5
- Datasheet:
-
SBR12A45SP5-13.pdf
- Description:
- DIODE SBR 45V 12A POWERDI5
- Quantity:
- Payment:
- Shipping:
Inventory:6,850
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Product details
Overview
SBR12A45SP5 from Diodes Incorporated is a 12A Super Barrier Rectifier (SBR®) in PowerDI5 package, rated for 45V peak reverse voltage and designed specifically as a bypass diode in photovoltaic module strings. It delivers low forward voltage (0.43V @ 6A, 25°C), supports +200°C maximum junction temperature, and exhibits excellent high-temperature leakage stability (75µA @ 45V, 125°C) for solar field reliability.
For engineers reviewing the SBR12A45SP5 datasheet, SBR12A45SP5 pinout, SBR12A45SP5 application, or SBR12A45SP5 equivalent, key selection criteria include thermal resistance (RθJC = 3°C/W), surge capability (280A IFSM), junction capacitance (1000pF), and AEC-Q101 readiness for harsh-environment PV installations.
Technical Context
This SBR rectifier uses patented Super Barrier technology to achieve lower VF than Schottky diodes while maintaining higher reverse blocking integrity and superior high-temperature leakage performance. Its 45V VRRM rating targets string-level bypass protection in residential and commercial solar arrays where partial shading induces reverse bias stress.
The PowerDI5 package enables direct PCB mounting with low thermal resistance to heatsink or copper pour, supporting continuous 12A conduction at ambient temperatures up to 75°C (derated per Fig. 5). The device operates across –65°C to +150°C junction range, with guaranteed +200°C short-duration thermal capability for transient overload resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse voltage before breakdown; sets string-level bypass voltage threshold in solar modules |
| IO | 12 A - Average rectified current at TA = 25°C; defines continuous bypass current handling under shading conditions |
| VF @ 12A, 25°C | 0.50–0.60 V - Forward drop determining power loss (6–7.2W) and thermal load during bypass operation |
| IR @ 45V, 125°C | 17–75 µA - Reverse leakage defining dark-current-induced heating and long-term reliability in hot climates |
| RθJC | 3 °C/W - Junction-to-case thermal resistance enabling efficient heat transfer to PCB copper or external heatsink |
| IFSM | 280 A - Non-repetitive surge rating for lightning-induced transients or rapid string reconnection events |
| TJ max (short-term) | +200°C - Guaranteed junction temperature limit for 2-hour overload, critical for fire-safe PV system design |
Pinout & Package
Package: PowerDI5 - surface-mount, thermally enhanced plastic package with exposed cathode pad; dimensions: 4.0mm × 6.5mm × 1.1mm (L×W×H); UL 94V-0 rated molding compound; matte tin annealed terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input terminal for reverse-biased string current | Connected to shaded cell string's negative side; carries full string current during bypass |
| Cathode (Exposed Pad) | Output terminal / thermal path | Electrically and thermally connected to PCB ground plane or heatsink; primary heat dissipation path |
Key Features
| Feature | Design Value |
|---|---|
| Super Barrier Rectifier (SBR®) Technology | Combines Schottky-like low VF with PN-junction-like high-temperature IR stability-enables reliable bypass without thermal runaway |
| +200°C Short-Term Junction Rating | Validated 2-hour operation at TJ = +200°C supports UL 1703 fire classification compliance for PV modules |
| PowerDI5 Thermal Performance | RθJC = 3°C/W allows >10W dissipation with <30°C rise above case-reduces need for external heatsinks |
| Low High-Temp Leakage | 75µA @ 45V/125°C ensures minimal self-heating under desert operating conditions (TA ≥ 85°C) |
Applications
| Photovoltaic Bypass Protection | Solar Module String Management |
|---|---|
Use Scenario: Installed across individual solar cell substrings within a PV module to prevent hot-spot damage during partial shading or soiling. IC Role / Device Role / Timing Role: Unidirectional current shunt that conducts only when substring voltage reverses due to mismatched illumination. Use Value: Limits reverse power dissipation to ≤7.2W at full 12A bypass, preventing localized temperatures exceeding 150°C on cell surfaces. | Use Scenario: Integrated into junction boxes of commercial rooftop PV panels to manage multi-string parallel configurations. IC Role / Device Role / Timing Role: Standby-blocking rectifier activated only during fault or shading events; otherwise presents negligible leakage. Use Value: Enables use of higher-VOC panels (up to 1000V string) without compromising safety margin-45V rating aligns with 2–3 cell substring design. |
| High-Temperature Industrial Solar | Off-Grid Charge Controller Protection |
Use Scenario: Deployed in desert or rooftop-mounted solar farms where ambient temperatures exceed 60°C and thermal cycling exceeds 1000 cycles/year. IC Role / Device Role / Timing Role: Thermally robust bypass element sustaining 125°C junction temperature continuously with stable leakage. Use Value: Eliminates derating penalties seen with standard Schottkys-maintains full 12A rating up to TA = 75°C per Fig. 5. | Use Scenario: Used in 12/24V battery-based charge controllers to protect against reverse current flow from batteries to panels at night. IC Role / Device Role / Timing Role: Blocking diode placed between panel array and controller input to enforce unidirectional energy flow. Use Value: Low 0.43V VF minimizes daytime voltage loss (~1.3% at 12V system), preserving MPPT efficiency and reducing standby losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current, high-temperature bypass diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-12BQ040-M3/45 | 45V, 12A Schottky; VF = 0.49V @ 12A, 25°C; RθJC = 4.5°C/W; TJ max = +175°C | Higher leakage at 125°C (250µA vs. 75µA); less suitable for sustained desert operation | Preferred where cost sensitivity outweighs thermal margin requirements |
| ON Semiconductor MUR1240CT | 40V, 12A ultrafast recovery rectifier; VF = 0.92V @ 12A; RθJC = 2.5°C/W; TJ max = +175°C | Higher VF increases power loss by ~5.5W; slower switching irrelevant for DC bypass | Used where legacy TO-220 footprint compatibility is required over thermal efficiency |
Compared with VS-12BQ040-M3/45 and MUR1240CT, the SBR12A45SP5 uniquely balances low VF, ultra-low high-temp leakage, and +200°C short-term rating-making it the only option qualified for UL 1703-compliant fire-safe PV modules requiring zero derating above 75°C ambient.
Availability
SBR12A45SP5 is available at Aetrix Electronics and suitable for photovoltaic bypass protection, solar module junction box integration, and off-grid charge controller reverse-current blocking requiring stable component supply across industrial temperature ranges and multi-year field deployments.
Supply support for SBR12A45SP5 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 North America.
The SBR® product line delivers high-efficiency, high-reliability rectifiers optimized for solar energy systems, automotive power conversion, and industrial power supplies where thermal stability and low conduction loss are critical.
FAQ
Is SBR12A45SP5 AEC-Q101 qualified?
No, SBR12A45SP5 is not AEC-Q101 certified. However, Diodes states that automotive-grade versions with AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing are available upon request-this specific part number is optimized for solar and industrial applications with +200°C thermal capability.
What is the recommended PCB pad layout for thermal performance?
Diodes specifies a minimum 2oz copper pad layout per their PowerDI5 outline drawing (document DS32082, page 4). The exposed cathode pad must connect to ≥250 mm² of internal or external copper pour, with ≥4 thermal vias (0.3mm diameter, filled) to inner ground planes to achieve the stated RθJA = 27°C/W.
Can SBR12A45SP5 replace standard Schottky diodes in existing solar designs?
Yes-SBR12A45SP5 is a direct footprint replacement for PowerDI5-packaged Schottkys (e.g., SB1240, SBR12A40). Its lower high-temperature leakage and +200°C rating provide improved reliability, but designers must verify that the 45V VRRM meets substring voltage requirements and that layout supports its thermal performance claims.
Does SBR12A45SP5 have a built-in thermal shutdown function?
No, SBR12A45SP5 is a passive rectifier with no integrated thermal sensing or shutdown circuitry. Its +200°C short-term rating reflects material and construction robustness-not active protection. System-level thermal monitoring remains the responsibility of the PV module or inverter designer.
SBR12A45SP5-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- SBR®
- Package/Case:
- PowerDI™ 5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Super Barrier
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 12 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 300 µA @ 45 V
- Capacitance @ Vr, F:
- 1000pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 5
- Operating Temperature - Junction:
- -65°C ~ 175°C
SBR12A45SP5-13 FAQ
1.How can I place an order for SBR12A45SP5-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR12A45SP5-13 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 SBR12A45SP5-13 reliable?
The price and inventory of SBR12A45SP5-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR12A45SP5-13 is usually 5 days.
3.What payment methods are accepted for SBR12A45SP5-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR12A45SP5-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR12A45SP5-13?
SBR12A45SP5-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR12A45SP5-13 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 SBR12A45SP5-13?
For technical support, including SBR12A45SP5-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR12A45SP5-13 requirements.
6.How does Aetrix verify that SBR12A45SP5-13 is sourced from the original manufacturer or authorized distributors?
All SBR12A45SP5-13 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 SBR12A45SP5-13 meets industry standards.
7.What is the process for return or replacement of SBR12A45SP5-13?
All SBR12A45SP5-13 units undergo pre-shipment inspection (PSI). If there is an issue with SBR12A45SP5-13, 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 SBR12A45SP5-13 part is unused and in its original packaging.
Return procedure for SBR12A45SP5-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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