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STMicroelectronics STPS20120CR
- Part No.:
- STPS20120CR
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Datasheet:
-
STPS20120CR.pdf
- Description:
- DIODE ARRAY SCHOT 120V 10A I2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:643
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Product details
Overview
STPS20120CR from STMicroelectronics is a dual-channel 120 V, 10 A per diode Schottky rectifier in I²PAK package, optimized for high-frequency SMPS output rectification with low forward voltage (0.70 V typ. @ 2.5 A, 25 °C) and low leakage (10 µA @ 25 °C). It delivers avalanche-rated robustness (330 W peak), 175 °C max junction temperature, and thermal resistance of 3 °C/W (junction-to-case per diode), enabling use in notebook/LCD adapters and desktop power supplies where voltage margin and thermal headroom are critical.
For engineers reviewing the STPS20120CR datasheet, STPS20120CR pinout, STPS20120CR application, or STPS20120CR equivalent, this page provides verified electrical parameters, validated I²PAK terminal mapping, real-world conduction loss equations, and direct alternatives with documented thermal and voltage trade-offs - all derived from ST's production-grade DocID11212 Rev 4.
Technical Context
This dual-diode Schottky rectifier integrates two independent 120 V, 10 A (Tc = 150 °C) channels in a single I²PAK thermally enhanced package. Its low VF–IR trade-off enables high-efficiency secondary-side rectification in 100–500 kHz SMPS topologies, while specified avalanche capability (PARM = 330 W, tp = 10 µs) supports transient overvoltage resilience without external clamping.
Thermal design relies on conduction cooling via the exposed tab: Rth(j-c) = 3 °C/W per diode, with coupling resistance Rth(c) = 0.6 °C/W between diodes. Conduction losses follow P = 0.62 × IF(AV) + 0.012 × IF²(RMS), confirming suitability for continuous-duty DC-DC outputs where junction temperature must stay below 175 °C under full load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120 V - Withstands repetitive reverse voltage up to 120 V, providing 20%+ margin over common 100 V SMPS output rails. |
| IF(AV) per diode | 10 A at Tc = 150 °C - Supports sustained 10 A DC output current per channel with heatsink mounting. |
| VF (typ) | 0.70 V @ 2.5 A, 25 °C - Reduces conduction loss by ~30% vs. standard silicon rectifiers, improving efficiency in 12–24 V outputs. |
| IR (max) | 5 mA @ 125 °C, VR = VRRM - Low leakage preserves efficiency at elevated ambient temperatures in compact adapters. |
| Tj (max) | 175 °C - Enables operation in thermally constrained spaces (e.g., ultra-thin laptop adapters) without derating. |
| PARM | 330 W @ tp = 10 µs, Tj = 125 °C - Absorbs short-duration inductive spikes without failure, eliminating need for external TVS in many designs. |
| Rth(j-c) per diode | 3 °C/W - Allows accurate junction temperature prediction when mounted on 10 cm² copper area (2 oz), supporting thermal reliability validation. |
Pinout & Package
The STPS20120CR is housed in an I²PAK (TO-263) surface-mount package with three terminals: two anodes (A1, A2) and one shared cathode (K). The exposed metal tab is electrically connected to the cathode and serves as the primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode of Diode 1 | Input node for first rectifier channel; connects to transformer secondary or switching node. |
| A2 | Anode of Diode 2 | Input node for second independent rectifier channel; enables dual-output or interleaved configurations. |
| K (Tab) | Common Cathode | Output node for both diodes; electrically and thermally tied to PCB copper pour for low-inductance return and heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| ECOPACK®2 compliance | Meets RoHS and halogen-free requirements without compromising thermal or electrical performance in I²PAK form factor. |
| Avalanche energy rating | 330 W peak (10 µs pulse) enables reliable operation during output short-circuit or no-load transients in unregulated SMPS. |
| Low VF–IR balance | 0.70 V forward drop at 2.5 A / 25 °C with only 10 µA leakage at same condition - minimizes combined conduction and standby losses. |
| High Tj capability | 175 °C maximum junction temperature allows full-rated current delivery in environments up to 85 °C ambient with standard PCB cooling. |
Applications
| Notebook AC/DC Adapters | LCD Monitor Power Supplies |
|---|---|
Use Scenario: Compact 65–90 W external adapters powering ultrabooks with tight thermal envelopes and strict efficiency mandates (e.g., DoE Level VI). IC Role / Device Role / Timing Role: Dual-channel synchronous rectifier replacing two discrete Schottkys, reducing BOM count and layout area. Use Value: 0.70 V VF reduces conduction loss by 0.25 W per diode vs. legacy 0.95 V parts, directly improving light-load efficiency by 0.8%. | Use Scenario: Internal 120–150 W open-frame SMPS in 24–32 inch LCD monitors, operating continuously at 50–70 °C ambient. IC Role / Device Role / Timing Role: Output rectifier for dual-rail (±12 V, +5 V) secondary stage, handling 8–10 A average current per rail. Use Value: 175 °C Tj rating avoids thermal shutdown during summer ambient conditions, extending field lifetime by >2× vs. 150 °C-rated alternatives. |
| Desktop PC ATX PSUs | Industrial DC-DC Modules |
Use Scenario: +12 V and +5 V output rectification in mid-range ATX power supplies (300–500 W), subject to 100 kHz switching and high ripple current. IC Role / Device Role / Timing Role: High-current freewheeling diode in synchronous rectified LLC resonant converters. Use Value: 30 A IF(RMS) rating accommodates peak currents up to 42 A (1.414 × 30 A), preventing RMS overstress during burst-mode operation. | Use Scenario: DIN-rail mounted 48 V input, 12 V/24 V output DC-DC modules for factory automation, requiring long-term reliability and surge immunity. IC Role / Device Role / Timing Role: Input-stage clamp diode and output rectifier in isolated flyback or forward converters. Use Value: Specified avalanche capability (330 W) absorbs 500 V/1 µs line surges without degradation, eliminating need for external snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-20CPH12-M3 | Same 120 V VRRM, but TO-247 package; higher Rth(j-c) = 4.5 °C/W; VF = 0.72 V @ 10 A. | Requires larger heatsink due to higher thermal resistance; less suitable for space-constrained SMT layouts. | Prefer when through-hole mounting and higher surge current (200 A IFSM) are prioritized over board area. |
| ON Semiconductor MBR20120CT | Dual 120 V/10 A Schottky in TO-220AB; VF = 0.85 V @ 10 A; IR = 10 mA @ 125 °C. | Higher forward drop increases conduction loss by ~0.35 W/channel; leakage doubles at high temperature. | Select when cost sensitivity outweighs efficiency targets and TO-220 mechanical compatibility is required. |
Compared with VS-20CPH12-M3 and MBR20120CT, STPS20120CR offers superior thermal performance (3 °C/W vs. 4.5/5.0 °C/W), lower VF, and SMT compatibility - making it optimal for high-density, high-efficiency adapter and monitor PSU designs where junction temperature control is critical.
Availability
STPS20120CR is available at Aetrix Electronics and suitable for notebook adapters, LCD monitor power supplies, and desktop ATX PSUs requiring stable component supply, consistent thermal behavior across production lots, and long-term industrial lifecycle support.
Supply support for STPS20120CR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The STPS20120CR belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency AC/DC and DC/DC conversion in space- and thermal-constrained power adapters and computing supplies.
FAQ
What is the maximum continuous forward current per diode at 100 °C case temperature?
At Tc = 100 °C, the STPS20120CR supports 10 A average forward current per diode - identical to its rated IF(AV) at Tc = 150 °C. This reflects its 175 °C maximum junction temperature and conservative thermal derating curve, allowing full-rated current even in moderately heated environments without additional heatsinking.
Can STPS20120CR replace a single 20 A discrete Schottky in a center-tapped transformer design?
No - STPS20120CR contains two independent 10 A diodes sharing a common cathode, not a single 20 A device. In center-tapped configurations, each diode conducts half the output current, so it supports up to 20 A total output (10 A per leg), matching typical 20 A center-tapped rectifier requirements while offering better thermal distribution than a single die.
Is the I²PAK tab electrically isolated from the cathode?
No - the exposed metal tab of the STPS20120CR is internally bonded to the common cathode (K) terminal. It must be connected to the system ground or output rail (whichever is the cathode potential) and cannot be used as a floating thermal pad; isolation requires insulating hardware or dielectric thermal interface material.
Does STPS20120CR require a minimum gate drive or control signal?
No - STPS20120CR is a passive Schottky rectifier with no control inputs, gate terminals, or bias requirements. It operates solely based on applied voltage polarity and current direction, making it compatible with all SMPS topologies (flyback, forward, LLC, active clamp) without timing or drive circuitry.
STPS20120CR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 120 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 920 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 120 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- I2PAK
STPS20120CR FAQ
1.How can I place an order for STPS20120CR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS20120CR 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 STPS20120CR reliable?
The price and inventory of STPS20120CR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20120CR is usually 5 days.
3.What payment methods are accepted for STPS20120CR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20120CR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS20120CR?
STPS20120CR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS20120CR 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 STPS20120CR?
For technical support, including STPS20120CR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20120CR requirements.
6.How does Aetrix verify that STPS20120CR is sourced from the original manufacturer or authorized distributors?
All STPS20120CR 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 STPS20120CR meets industry standards.
7.What is the process for return or replacement of STPS20120CR?
All STPS20120CR units undergo pre-shipment inspection (PSI). If there is an issue with STPS20120CR, 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 STPS20120CR part is unused and in its original packaging.
Return procedure for STPS20120CR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS20120CR Tags
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