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Diodes Incorporated STPS1040
- Part No.:
- STPS1040
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
STPS1040.pdf
- Description:
- DIODE ARRAY GP 400V 5A ITO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:38
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Product details
Overview
STPS1040 from Diodes Incorporated is a 400 V, 10 A dual common-cathode super-fast rectifier in ITO-220AB package, featuring 35 ns reverse recovery time, 1.30 V max forward voltage at 5 A/25°C, and 10 µA max reverse leakage at 400 V/25°C; used in high-frequency DC-DC converters and SMPS secondary-side rectification.
For engineers reviewing the STPS1040 datasheet, STPS1040 pinout, STPS1040 application, or STPS1040 equivalent, key selection criteria include peak reverse voltage rating, thermal resistance (4 °C/W junction-to-case), surge current capability (80 A), low VF for efficiency, and ITO-220AB mechanical compatibility with heatsink mounting.
Technical Context
This dual-diode rectifier integrates two independent super-fast switching diodes sharing a common cathode terminal, enabling synchronous or center-tapped transformer secondary configurations. Its glass-passivated die construction ensures stable performance under thermal cycling and high dv/dt stress.
The device operates across –55°C to +150°C junction temperature range with 4 °C/W typical RθJC, supporting high-power density designs when mounted on aluminum or copper heatsinks. Reverse recovery time of 35 ns (IF = 0.5 A, IR = 1.0 A) enables operation up to several hundred kHz without excessive switching loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - blocks transient spikes in 380 VAC-derived DC bus systems |
| IO (per leg) | 5 A @ TC = 105°C - supports continuous 5 A per anode under thermally managed conditions |
| IFSM | 80 A - withstands inrush/surge events in power supply startup or fault recovery |
| tRR | 35 ns - minimizes switching loss in 200–500 kHz DC-DC topologies |
| VF max | 1.30 V @ 5 A/25°C - reduces conduction loss vs. standard fast rectifiers (typically >1.5 V) |
| IR max | 10 µA @ 400 V/25°C - maintains high isolation integrity in standby or light-load modes |
| RθJC | 4 °C/W - enables direct heatsink mounting for efficient thermal dissipation |
Pinout & Package
Package: ITO-220AB (Type WX2), molded green plastic housing with matte tin-plated leads; 1.558 g mass; UL 94V-0 rated; designed for through-hole mounting and heatsink attachment via tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (Lead 1) | Input terminal for first diode leg | Accepts positive input from transformer secondary or switching node |
| Anode 2 (Lead 2) | Input terminal for second diode leg | Enables dual-leg configuration (e.g., center-tapped rectifier) |
| Cathode (Tab) | Common output node | Electrically connected to metal tab; must be isolated or grounded per layout; primary heat path |
Key Features
| Feature | Design Value |
|---|---|
| Super-fast recovery (35 ns) | Reduces switching loss and EMI generation in high-frequency SMPS |
| Glass passivated die | Improves long-term reliability under humidity, thermal stress, and voltage transients |
| Low VF (1.30 V max) | Increases system efficiency by lowering conduction loss at rated current |
| High surge rating (80 A) | Supports robust operation during cold-start, overload, or short-circuit recovery |
| RoHS 3 & "Green" compliant | Meets global environmental regulations with <900 ppm Br/Cl and <1000 ppm Sb |
Applications
| Server Power Supply Rectification | Industrial DC-DC Converter |
|---|---|
Use Scenario: Secondary-side rectification in 48 V input, 12 V/20 A output telecom-grade DC-DC modules. IC Role / Device Role / Timing Role: Dual-anode super-fast rectifier providing low-loss, high-efficiency power conversion. Use Value: 35 ns tRR and 1.30 V VF reduce switching and conduction losses, improving full-load efficiency by ~0.8% over standard fast diodes. | Use Scenario: Output rectification in isolated 24 V to 5 V/10 A industrial buck-boost converter. IC Role / Device Role / Timing Role: Common-cathode dual diode enabling compact center-tapped transformer design. Use Value: 4 °C/W RθJC allows direct heatsink mounting without thermal interface pads, simplifying mechanical integration. |
| Automotive On-Board Charger (OBC) Auxiliary Supply | LED Driver Secondary Rectification |
Use Scenario: Auxiliary 12 V rail generation from high-voltage battery in EV OBC subsystems. IC Role / Device Role / Timing Role: High-reliability rectifier handling intermittent surges and wide ambient temperature swings. Use Value: –55°C to +150°C operating range and 80 A IFSM ensure functional stability during cold cranking and thermal soak conditions. | Use Scenario: Constant-current LED driver output stage with 36 V DC bus and 700 mA load. IC Role / Device Role / Timing Role: Low-leakage rectifier maintaining regulation accuracy during dimming intervals. Use Value: 10 µA max IR at 400 V prevents output voltage drift during PWM-off periods, preserving dimming linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH10R06 | 600 V VRRM, 35 ns tRR, 1.7 V VF max @ 5 A - higher blocking voltage but higher forward drop | Better suited for 400–600 V DC bus systems; less efficient at low-voltage outputs | Select when higher reverse margin is required and thermal budget allows higher VF loss |
| MBR1045CT | 45 V VRRM, 35 ns tRR, 0.85 V VF max - lower voltage rating, lower VF | Only suitable for ≤45 V applications; unsuitable for 400 V SMPS inputs | Choose only for low-voltage, high-efficiency designs where 400 V blocking is unnecessary |
Compared with STTH10R06 and MBR1045CT, the STPS1040 uniquely balances 400 V blocking, 1.30 V low forward voltage, and 35 ns speed-making it optimal for 380 VAC-derived 400 V DC bus SMPS where both efficiency and voltage margin matter.
Availability
STPS1040 is available at Aetrix Electronics and suitable for switched-mode power supplies, high-frequency DC-DC converters, and automotive auxiliary power systems requiring stable component supply and RoHS-compliant sourcing.
Supply support for STPS1040 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 STPS series targets high-efficiency power conversion applications, emphasizing fast recovery, low forward voltage, and rugged packaging for industrial and computing power supplies.
FAQ
Is STPS1040 suitable for surface-mount assembly?
No. STPS1040 uses the ITO-220AB through-hole package with a metal tab for heatsinking. It requires hole mounting and mechanical clamping or screw attachment to a heatsink. Reflow or wave soldering is not applicable due to its leaded, thermally optimized construction.
What is the maximum junction temperature during continuous operation?
The absolute maximum junction temperature is +150°C. Continuous operation at this limit requires strict thermal management: junction-to-case resistance is 4 °C/W, so at 10 A total current and 1.3 V forward drop, power dissipation reaches ~13 W-demanding a heatsink that maintains case temperature ≤100°C.
Does STPS1040 meet AEC-Q101 for automotive use?
No. The datasheet states STPS1040 is commercial-grade; automotive qualification (AEC-Q101) requires specific change control, PPAP, and IATF 16949 manufacturing-available only upon special request and separate part numbering. This variant is not pre-qualified.
Can STPS1040 replace a single 10 A standard recovery diode?
No-it is a dual common-cathode diode (two 5 A legs). Replacing a single 10 A diode requires verifying circuit topology: it fits center-tapped or dual-winding configurations, but not single-anode applications without redesign. Pinout and connection topology differ fundamentally.
STPS1040 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack, Isolated Tab
- 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):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 5 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:
- ITO220AB (Type WX2)
STPS1040 FAQ
1.How can I place an order for STPS1040 through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1040 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 STPS1040 reliable?
The price and inventory of STPS1040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1040 is usually 5 days.
3.What payment methods are accepted for STPS1040?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1040 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1040?
STPS1040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1040 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 STPS1040?
For technical support, including STPS1040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1040 requirements.
6.How does Aetrix verify that STPS1040 is sourced from the original manufacturer or authorized distributors?
All STPS1040 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 STPS1040 meets industry standards.
7.What is the process for return or replacement of STPS1040?
All STPS1040 units undergo pre-shipment inspection (PSI). If there is an issue with STPS1040, 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 STPS1040 part is unused and in its original packaging.
Return procedure for STPS1040:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1040 Tags
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BAV99-7-F
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