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Diodes Incorporated STPR2040
- Part No.:
- STPR2040
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STPR2040.pdf
- Description:
- DIODE ARRAY GP 400V 10A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:48
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Product details
Overview
STPR2040 from Diodes Incorporated is a 20A dual-leg super-fast rectifier in TO220AB package, rated for 400V peak reverse voltage, 1.3V forward voltage at 10A/25°C, 10μA reverse leakage at 400V/25°C, and 35ns reverse recovery time - deployed in high-frequency DC-DC converters and SMPS secondary-side rectification.
For engineers reviewing the STPR2040 datasheet, STPR2040 pinout, STPR2040 application, or STPR2040 equivalent, key selection criteria include its 400V VRRM, 20A total average output current (10A per leg), low 1.3V VF at rated current, 35ns tRR, and TO220AB thermal performance with RθJC = 2°C/W.
Technical Context
This dual-common-cathode super-fast rectifier integrates two independent 10A legs sharing one cathode terminal, enabling synchronous or interleaved rectification topologies. Its glass-passivated die construction ensures stable operation under repetitive surge conditions up to 125A (8.3ms half-sine).
Designed for high-switching-frequency power conversion, it delivers low stored charge (Qrr implied by tRR = 35ns) and minimal reverse recovery loss, critical for efficiency in 100kHz–1MHz SMPS designs where diode switching losses dominate conduction losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Withstands peak reverse voltage in boost/flyback secondary windings without breakdown |
| IO (per leg) | 10 A - Sustains continuous DC output current per anode leg at TC = 100°C |
| VF @ 10A/25°C | 1.30 V - Directly determines conduction loss (13W dissipation per leg at 10A) |
| tRR | 35 ns - Enables efficient operation above 500kHz with minimal switching loss and EMI |
| IFSM | 125 A - Handles transient surges during startup or overload without failure |
| RθJC | 2 °C/W - Allows 20W power dissipation with only 40°C junction-to-case temperature rise |
| CT | 80 pF - Limits capacitive coupling noise in high-dv/dt gate-drive or snubber circuits |
Pinout & Package
TO220AB (Type WX) package with isolated mounting tab (anode-connected), matte tin-plated leads, UL 94V-0 molding compound, and 1.927g mass. Mounting tab serves as Anode 1 and Anode 2; Cathode is common terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Tab (center) | Anode 1 / Anode 2 | Electrically connected to both anodes; requires insulating washer if mounted to heatsink |
| Lead 1 (left) | Anode 1 | Input terminal for first rectifier leg; shares tab connection |
| Lead 2 (right) | Cathode (common) | Shared output node for both legs; carries full 20A combined current |
Key Features
| Feature | Design Value |
|---|---|
| Super-fast switching (tRR = 35ns) | Reduces turn-off loss and ringing in hard-switched topologies above 200kHz |
| Glass passivated die | Ensures long-term reliability under humidity and thermal cycling stress in industrial environments |
| 400V VRRM rating | Supports 280VAC input-derived DC bus (400V peak) with 20% safety margin |
| Low 10μA IR @ 400V/25°C | Minimizes standby power loss in offline adapters and energy-efficient PSUs |
| RoHS-compliant & halogen-free | Meets IPC-1752A material declaration requirements for automotive and medical OEMs |
Applications
| Server Power Supply | Industrial DC-DC Converter |
|---|---|
Use Scenario: 48V–12V intermediate bus converter in rack-mounted servers operating at 300kHz. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement, handling 15A continuous load per rail. Use Value: 35ns tRR prevents cross-conduction loss during MOSFET dead-time, improving efficiency by 1.2% over standard FRDs. | Use Scenario: Isolated 24V input to ±15V dual-output supply for PLC I/O modules. IC Role / Device Role / Timing Role: Dual-leg output rectifier delivering independent +15V and –15V rails from center-tapped transformer. Use Value: Common-cathode configuration eliminates need for separate cathode traces, reducing PCB layout complexity and parasitic inductance. |
| LED Driver Power Stage | Automotive On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: High-brightness LED streetlight driver with 350kHz flyback topology and 36V output. IC Role / Device Role / Timing Role: Output rectifier managing 8A average current with 100kHz ripple frequency. Use Value: 1.3V VF limits conduction loss to <10.4W, enabling natural convection cooling instead of forced air. | Use Scenario: 12V auxiliary supply derived from 400V battery in EV OBC, operating at 250kHz. IC Role / Device Role / Timing Role: Input-stage rectifier converting AC from onboard transformer to DC bus before buck regulation. Use Value: 125A IFSM withstands inrush during cold-start, eliminating need for NTC thermistors or active inrush limiters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2004D (STMicroelectronics) | Same 400V VRRM, but 20A single-leg; tRR = 30ns, VF = 1.25V @ 10A | Requires two devices for dual-leg configuration; higher board area and thermal interface count | Prefer when discrete layout control or asymmetric leg current sharing is needed |
| DF2004S (ON Semiconductor) | 400V VRRM, 20A total, but TO220AC package (non-isolated tab); tRR = 45ns, VF = 1.35V | Tab tied to cathode - mandates insulated mounting hardware and increases thermal resistance | Choose only when cost sensitivity outweighs thermal performance and isolation requirements |
Compared with STTH2004D and DF2004S, STPR2040 uniquely integrates dual 10A legs with isolated anode tab in one TO220AB package, delivering optimal space efficiency, thermal management, and layout simplicity for dual-rail or interleaved SMPS outputs.
Availability
STPR2040 is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, LED driver power stages, and automotive on-board charger auxiliary supplies requiring stable component supply and long-lifecycle support.
Supply support for STPR2040 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 automotive markets.
The STPR series targets high-frequency power conversion applications, emphasizing fast recovery, low forward drop, and robust surge capability in standardized through-hole packages for reliability-critical power supplies.
FAQ
What is the thermal resistance from junction to case (RθJC) for STPR2040?
The typical thermal resistance from junction to case is 2°C/W, measured per JESD-51 standards on a 100mm × 100mm × 1.9mm copper pad. This value enables direct heatsink mounting with predictable temperature rise - for example, 20W dissipation yields only 40°C ΔT between junction and case.
Can STPR2040 be used in place of a single 20A rectifier?
No - STPR2040 contains two independent 10A legs sharing a common cathode; it is not a single 20A device. Using it as a single-leg rectifier wastes one anode and misrepresents its current rating. It must be applied in dual-output or interleaved configurations where both legs carry ≤10A each.
Is the mounting tab electrically isolated in STPR2040?
Yes - the TO220AB (Type WX) package features an electrically isolated mounting tab connected to both anodes. This allows direct mechanical attachment to a grounded heatsink without shorting the anode nodes, unlike TO220AC variants where the tab is cathode-connected.
What is the maximum operating temperature for STPR2040?
The junction and storage temperature range is –55°C to +150°C. At TC = 100°C, each leg sustains 10A average current. Derating curves show usable current drops to ~6.5A per leg at TC = 125°C, confirming suitability for sealed industrial enclosures with limited airflow.
STPR2040 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO220AB (Type WX)
STPR2040 FAQ
1.How can I place an order for STPR2040 through Aetrix?
Please submit a Request for Quotation (RFQ) for STPR2040 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 STPR2040 reliable?
The price and inventory of STPR2040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPR2040 is usually 5 days.
3.What payment methods are accepted for STPR2040?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPR2040 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPR2040?
STPR2040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPR2040 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 STPR2040?
For technical support, including STPR2040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPR2040 requirements.
6.How does Aetrix verify that STPR2040 is sourced from the original manufacturer or authorized distributors?
All STPR2040 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 STPR2040 meets industry standards.
7.What is the process for return or replacement of STPR2040?
All STPR2040 units undergo pre-shipment inspection (PSI). If there is an issue with STPR2040, 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 STPR2040 part is unused and in its original packaging.
Return procedure for STPR2040:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPR2040 Tags
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BAV99-7-F
Diodes Incorporated
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BAV99,215
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BAV70LT1G
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BAT54S-7-F
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BAV99LT1G
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