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STMicroelectronics STPS2045CG
- Part No.:
- STPS2045CG
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS2045CG.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 10A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:8,198
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Product details
Overview
STPS2045CG from STMicroelectronics is a dual center-tap Schottky rectifier in D²PAK package, rated for 45 V repetitive peak reverse voltage, 2 × 10 A average forward current per diode, and 0.5 V typical forward voltage at 125 °C/10 A - optimized for low-voltage, high-frequency DC-DC converters and synchronous rectification in server PSUs.
For engineers reviewing the STPS2045CG datasheet, STPS2045CG pinout, STPS2045CG application, or STPS2045CG equivalent, this device is selected for high-efficiency secondary-side rectification where low conduction loss, negligible switching loss, and avalanche ruggedness are critical in compact, thermally constrained power stages.
Technical Context
This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode terminal (center-tap configuration), enabling synchronous rectification or dual-output flyback topologies. Its 175 °C maximum junction temperature and 3.5 °C/W total junction-to-case thermal resistance (D²PAK) support sustained operation under high ambient conditions with minimal heatsinking.
The device features avalanche-rated capability (60 V repetitive peak avalanche voltage, 280 W peak avalanche power at 10 µs), validated per ST AN1768 and AN2025, allowing safe energy clamping during transient overvoltage events without external snubbers in hard-switched converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum reverse blocking voltage per diode; enables use in 12 V–24 V output rails with 2× safety margin against transient spikes. |
| IF(AV) | 2 × 10 A - Average forward current rating per diode at TC = 125 °C; supports 20 A total device output in dual-channel configurations. |
| VF (typ.) | 0.5 V @ 125 °C / 10 A - Low conduction loss reduces power dissipation to ~5 W per diode at full load, improving efficiency >95% in 48 V–12 V buck converters. |
| Tj(max) | 175 °C - High junction temperature rating allows operation in sealed enclosures or near hot components without derating below 125 °C ambient. |
| Rth(j-c) | 3.5 °C/W (total) - Junction-to-case thermal resistance in D²PAK; enables direct mounting to PCB copper pour or small heatsink for <10 W total dissipation. |
| IFSM | 180 A - Non-repetitive surge current (10 ms sine); withstands inrush and short-circuit transients in industrial power supplies. |
| VARM | 60 V - Repetitive peak avalanche voltage; permits controlled clamping of inductive kickback in freewheeling applications without breakdown. |
Pinout & Package
STPS2045CG uses the surface-mount D²PAK (TO-263) package with three terminals: two anodes (A1, A2) and one shared cathode (K). The package features insulated epoxy molding (UL 94 V0), 1.38 g mass, and a recommended footprint per Figure 14 (DocID3506 Rev 10, p.14).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input terminal for first Schottky junction; connects to primary-side switch node in synchronous rectifier or one winding end in center-tap transformer. |
| A2 | Anode 2 | Input terminal for second Schottky junction; connects to complementary switch node or opposite winding end in center-tap topology. |
| K | Common Cathode | Output node shared by both diodes; serves as regulated DC output rail (e.g., +12 V) and return path for both channels. |
Key Features
| Feature | Design Value |
|---|---|
| Extremely fast switching | No reverse recovery charge (Qrr ≈ 0); eliminates switching losses and EMI in >300 kHz DC-DC converters. |
| Avalanche rated | 280 W peak avalanche power (10 µs) and 60 V VARM; enables robust freewheeling without external TVS in motor drive H-bridges. |
| Insulated D²PAK package | UL 94 V0 epoxy, 1.38 g weight, and thermal pad on underside; supports automated reflow assembly and direct PCB thermal coupling. |
| ECOPACK®2 compliance | Lead-free, halogen-free, RoHS-compliant construction; meets industrial and telecom environmental requirements without performance trade-offs. |
Applications
| Server Power Supply Rectification | Industrial DC-DC Converter Output Stage |
|---|---|
|
Use Scenario: Secondary-side rectification in 48 V–12 V isolated buck-derived PSUs for AI accelerators and network switches. IC Role / Device Role / Timing Role: Dual Schottky rectifier replacing MOSFETs in synchronous rectification; operates at 300–500 kHz switching frequency with zero reverse recovery delay. Use Value: Reduces conduction loss by 40% vs. silicon diodes, lowering thermal stress on PCB and enabling 20% higher power density in 1U chassis. |
Use Scenario: Output rectification in 24 V input, ±15 V dual-rail DC-DC modules for PLC I/O cards and motion controllers. IC Role / Device Role / Timing Role: Center-tap dual anode configuration delivers independent +15 V and –15 V outputs from single transformer secondary. Use Value: Eliminates need for two discrete Schottky diodes and associated layout area; improves cross-regulation and thermal symmetry between rails. |
| Automotive On-Board Charger (OBC) Auxiliary Supply | Telecom Rectifier Module Freewheeling |
|
Use Scenario: 12 V auxiliary supply rectification in bidirectional OBCs, operating across –40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Freewheeling diode in active clamp flyback; handles 180 A surge during fault conditions without degradation. Use Value: Avalanche rating ensures reliable clamping of leakage inductance spikes during ZVS transitions, extending MOSFET lifetime. |
Use Scenario: Polarity protection and freewheeling in 48 V telecom rectifier modules with redundant input paths. IC Role / Device Role / Timing Role: Dual-anode configuration enables OR-ing function across two input sources while providing reverse polarity blocking. Use Value: Single-device solution replaces discrete diode pairs, reducing BOM count by 2 parts and improving system-level MTBF by 15%. |
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-20CPH045 | Dual center-tap in TO-247AC; 45 V VRRM, 20 A total IF(AV), but VF = 0.62 V (typ.) at 125 °C - 24% higher conduction loss. | Requires bolt-down heatsink due to TO-247 thermal resistance (Rth(j-c) = 1.2 °C/W per diode); unsuitable for space-constrained SMT designs. | Select when mechanical robustness and ultra-high surge tolerance (>250 A IFSM) outweigh PCB area and thermal integration needs. |
| ON Semiconductor MBR2045CT | Dual center-tap in TO-220AB; same 45 V/20 A rating but VF = 0.72 V (max) at 125 °C and no avalanche rating - limited to non-inductive loads. | Through-hole mounting only; lacks insulation rating (no 2000 VRMS isolation), requiring creepage/clearance redesign in safety-critical AC-DC front-ends. | Choose for cost-sensitive, non-avalanche applications where manual assembly and legacy board layouts are fixed. |
Compared with VS-20CPH045 and MBR2045CT, STPS2045CG uniquely combines SMT D²PAK packaging, 60 V avalanche capability, and 0.5 V low-VF performance - making it optimal for high-density, high-reliability DC-DC outputs where thermal management and transient immunity are co-constrained.
Availability
STPS2045CG is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and automotive on-board charger auxiliary supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for STPS2045CG 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, Switzerland, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
STPS2045CG belongs to ST's high-efficiency Power Schottky Rectifier product line, engineered specifically for high-frequency, low-voltage power conversion systems demanding minimal conduction loss, avalanche ruggedness, and thermally efficient packaging.
FAQ
What is the maximum allowable case temperature for continuous operation of STPS2045CG?
The STPS2045CG is rated for continuous operation with case temperature (TC) up to 125 °C, as specified in Table 2 for IF(AV) = 20 A (per device). Exceeding this requires derating per Figure 2; operation above 125 °C risks accelerated parametric drift and reduced reliability, even though Tj(max) is 175 °C.
Does STPS2045CG require a heatsink in typical 12 V/10 A applications?
In a well-designed 4-layer PCB with ≥200 mm² of 2 oz copper connected to the D²PAK thermal pad, STPS2045CG dissipates ≤5.5 W per diode at full load and maintains Tj < 120 °C without an external heatsink. A heatsink is only needed if ambient exceeds 85 °C or copper area is <100 mm².
How does the avalanche rating of STPS2045CG improve system reliability in flyback converters?
The 60 V VARM and 280 W PARM ratings allow STPS2045CG to safely absorb leakage inductance energy during MOSFET turn-off without voltage overshoot exceeding 60 V. This prevents secondary-side MOSFET avalanche failure and eliminates need for snubber networks, reducing component count and board area.
Can STPS2045CG be used in place of a single-diode Schottky like STPS1045C?
No - STPS2045CG is a dual center-tap device with two anodes and one shared cathode, whereas STPS1045C is a single-diode TO-220AB part. Substitution would require circuit redesign: STPS2045CG enables center-tap transformer topologies or dual-output rectification, not drop-in replacement for single-diode functions.
STPS2045CG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 570 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
STPS2045CG FAQ
1.How can I place an order for STPS2045CG through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS2045CG 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 STPS2045CG reliable?
The price and inventory of STPS2045CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2045CG is usually 5 days.
3.What payment methods are accepted for STPS2045CG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2045CG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS2045CG?
STPS2045CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS2045CG 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 STPS2045CG?
For technical support, including STPS2045CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2045CG requirements.
6.How does Aetrix verify that STPS2045CG is sourced from the original manufacturer or authorized distributors?
All STPS2045CG 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 STPS2045CG meets industry standards.
7.What is the process for return or replacement of STPS2045CG?
All STPS2045CG units undergo pre-shipment inspection (PSI). If there is an issue with STPS2045CG, 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 STPS2045CG part is unused and in its original packaging.
Return procedure for STPS2045CG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS2045CG Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
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