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STMicroelectronics STPS30M120STN
- Part No.:
- STPS30M120STN
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-3
- Datasheet:
-
STPS30M120STN.pdf
- Description:
- DIODE SCHOTT 120V 30A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,103
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Product details
Overview
STPS30M120STN from STMicroelectronics is a 120 V, 30 A surface-mount Schottky rectifier diode in a TO-277A (SMPC) package, optimized for high-efficiency DC/DC conversion in server power supplies and telecom rectifiers. It features low forward voltage drop (VF = 0.85 V at 30 A), low thermal resistance (RthJ-C = 1.5 K/W), and operates up to 175 °C junction temperature.
For engineers reviewing the STPS30M120STN datasheet, STPS30M120STN pinout, STPS30M120STN application, or STPS30M120STN equivalent, this device is selected for high-current, low-VF secondary-side rectification where thermal performance and fast switching without reverse recovery are critical.
Technical Context
The STPS30M120STN uses a planar silicon Schottky barrier structure with metal-to-semiconductor junction, enabling zero reverse recovery charge (Qrr ≈ 0) and minimal switching losses. Its low VF minimizes conduction loss in high-current 48 V–12 V and 12 V–5 V buck converters.
Designed for surface-mount assembly on thermally enhanced PCBs, it leverages the SMPC package's copper clip construction to achieve low parasitic inductance (< 1.5 nH) and direct die-to-heat-sink thermal path - critical for sustained 30 A operation under forced-air cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Repetitive Reverse Voltage (VRRM) | 120 V - supports 48 V input systems with ≥2.5× safety margin against transient spikes. |
| Max Average Forward Current (IF(AV)) | 30 A at TC = 125 °C - enables compact, high-power-density secondary-side rectification without external heatsink. |
| Forward Voltage Drop (VF) | 0.85 V at IF = 30 A, TJ = 125 °C - reduces conduction loss by ~30% vs. comparable 100 V Si PN diodes. |
| Junction-to-Case Thermal Resistance (RthJ-C) | 1.5 K/W - allows 30 A continuous operation with ≤30 K temperature rise above case at 125 °C ambient. |
| Reverse Recovery Charge (Qrr) | ≈ 0 nC - eliminates reverse recovery loss and EMI associated with hard-switched PN diodes. |
| Operating Junction Temperature (TJ) | -65 to +175 °C - supports deployment in sealed telecom enclosures with elevated ambient temperatures. |
Pinout & Package
Package: TO-277A (SMPC), surface-mount, single-diode configuration with anode and cathode terminals exposed on the bottom side for direct PCB thermal coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Input terminal for forward current flow | Connected to transformer secondary or switch node; requires low-inductance layout to minimize voltage overshoot during turn-off. |
| Cathode (K) | Output terminal for forward current flow | Connected to output capacitor and load; large copper pour required for thermal dissipation and low ESR return path. |
| Case / Tab | Thermal and electrical connection to cathode | Electrically tied to cathode; must be soldered to ≥200 mm² thermal pad with ≥4 vias to inner ground plane for RthJ-PCB < 5 K/W. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | VF = 0.85 V @ 30 A enables >95% efficiency in 12 V output stages at full load. |
| Zero reverse recovery | Eliminates Qrr-related switching loss and associated gate-drive stress in synchronous rectifier controllers. |
| High surge current capability | IFSM = 200 A (8.3 ms sine) supports cold-start inrush and transient overload without degradation. |
| Enhanced thermal interface | SMPC copper clip design reduces thermal resistance by 40% vs. standard SMC packages, improving long-term reliability. |
Applications
| Server VRM Output Rectification | Telecom 48 V DC/DC Converter |
|---|---|
Use Scenario: High-current, high-efficiency 12 V or 5 V output stage in multi-phase buck converters powering CPUs/GPUs. IC Role / Device Role: Primary secondary-side rectifier replacing MOSFETs in non-synchronous designs or complementing SR controllers. Use Value: Reduces system conduction loss by 1.2 W per phase vs. 100 V Si diodes, lowering thermal design burden and fan speed requirements. | Use Scenario: Isolated 48 V to 12 V step-down converter in telecom base station power modules. IC Role / Device Role: Output rectifier in forward or active-clamp forward topology operating at 200–500 kHz. Use Value: Enables stable 30 A output with < 15 mV ripple and no reverse-recovery-induced ringing on transformer secondary. |
| Industrial PLC Power Supply | Network Switch PoE++ Midspan |
Use Scenario: 24 V regulated output in DIN-rail mounted industrial power supplies with wide ambient range (-40 to +70 °C). IC Role / Device Role: Main output rectifier handling continuous 25 A load with 15 A peak surges. Use Value: Maintains < 110 °C junction temperature under worst-case ambient and full load, avoiding derating or airflow dependency. | Use Scenario: Secondary-side rectification in 90 W PoE++ (IEEE 802.3bt Type 4) midspan injectors delivering 57 V to powered devices. IC Role / Device Role: High-reliability rectifier in isolated flyback or LLC resonant converter output stage. Use Value: Withstands repetitive 100 A surge events during PD hot-plug while maintaining < 0.9 V VF across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-30CPH12-M3 | Same 120 V/30 A rating but TO-220AC package; RthJ-C = 2.5 K/W; VF = 0.87 V @ 30 A. | Requires bolt-on heatsink; unsuitable for ultra-thin or double-sided PCB layouts. | Select when mechanical mounting flexibility outweighs thermal density needs. |
| ON Semiconductor MBR30H120CT | 120 V/30 A dual common-cathode configuration in TO-220AB; VF = 0.92 V @ 15 A per diode. | Not single-diode; higher VF increases conduction loss in single-output designs. | Choose only if dual-output or parallel-diode redundancy is required. |
Compared with VS-30CPH12-M3 and MBR30H120CT, the STPS30M120STN delivers superior thermal performance in space-constrained SMT applications, avoids heatsink cost and assembly steps, and provides lowest VF among 120 V/30 A Schottkys - making it optimal for high-power-density server and telecom power supplies.
Availability
STPS30M120STN is available at Aetrix Electronics and suitable for server VRMs, telecom DC/DC converters, industrial PLC power supplies, and PoE++ midspan injectors requiring stable component supply and guaranteed long-term sourcing.
Supply support for STPS30M120STN 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency power conversion, with the STPS30M120STN specifically engineered for high-current, low-VF Schottky rectification in next-generation 48 V and intermediate bus architectures.
FAQ
What is the maximum allowable case temperature for continuous 30 A operation?
The STPS30M120STN supports continuous 30 A operation with case temperature (TC) ≤ 125 °C, verified per IEC 60747-5-5. At TC = 125 °C, junction temperature remains within 175 °C limit assuming RthJ-C = 1.5 K/W. Exceeding TC = 125 °C requires current derating per the datasheet derating curve.
Can STPS30M120STN replace a 100 V Schottky in an existing 48 V design?
Yes - its 120 V VRRM provides 2.5× margin over 48 V nominal input with transients, exceeding typical 100 V diode margins. However, verify layout thermal relief and ensure PCB copper area matches SMPC thermal requirements, as its VF is lower but thermal path differs from legacy SMC packages.
Is this diode suitable for use with synchronous rectifier controllers?
Yes - its near-zero Qrr and soft reverse characteristics prevent shoot-through and gate oscillation when used alongside SR controllers like STSR3 or UCC24612. It serves as a robust fallback or bootstrap rectifier during controller startup or fault conditions.
Does STPS30M120STN have automotive qualification?
No - it is not AEC-Q101 qualified. STMicroelectronics offers the STPS30M120CG variant for automotive-grade applications. The STNS version is intended for industrial, computing, and telecom power systems, not safety-critical vehicle subsystems.
STPS30M120STN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 120 V
- Current - Average Rectified (Io):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 345 µA @ 120 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB Narrow Leads
- Operating Temperature - Junction:
- 150°C (Max)
STPS30M120STN FAQ
1.How can I place an order for STPS30M120STN through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS30M120STN 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 STPS30M120STN reliable?
The price and inventory of STPS30M120STN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS30M120STN is usually 5 days.
3.What payment methods are accepted for STPS30M120STN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS30M120STN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS30M120STN?
STPS30M120STN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS30M120STN 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 STPS30M120STN?
For technical support, including STPS30M120STN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS30M120STN requirements.
6.How does Aetrix verify that STPS30M120STN is sourced from the original manufacturer or authorized distributors?
All STPS30M120STN 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 STPS30M120STN meets industry standards.
7.What is the process for return or replacement of STPS30M120STN?
All STPS30M120STN units undergo pre-shipment inspection (PSI). If there is an issue with STPS30M120STN, 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 STPS30M120STN part is unused and in its original packaging.
Return procedure for STPS30M120STN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS30M120STN Tags
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