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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

STMicroelectronics STPS50U100CT

Name: STPS50U100CT
Brand: STMicroelectronics
SKU: STPS50U100CT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS50U100CT

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: STPS50U100CT.pdf

Description:: DIODE ARR SCHOTT 100V 25A TO-220

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Product details

Overview

STPS50U100CT from STMicroelectronics is a dual ultralow forward voltage (ULVF™) Schottky rectifier in TO-220AB package, rated for 100 V reverse voltage and 2 × 25 A average forward current per diode at 120 °C case temperature. It delivers 0.64 V typical forward voltage at 25 A/125 °C and operates up to 150 °C junction temperature, targeting high-efficiency AC-DC and DC-DC power supplies in notebook adapters and server SMPS.

For engineers reviewing the STPS50U100CT datasheet, STPS50U100CT pinout, STPS50U100CT application, or STPS50U100CT equivalent, key selection criteria include its dual-diode configuration, ULVF™ low conduction loss, thermal coupling behavior between diodes, and TO-220AB mechanical mounting requirements - all critical for thermal design and efficiency compliance in high-frequency switch-mode power supplies.

Technical Context

This dual Schottky rectifier integrates two independent anode-cathode junctions in a single TO-220AB thermally coupled package. Its ULVF™ architecture minimizes forward voltage drop across the full operating range (0.38–0.73 V), directly reducing conduction losses in high-current, high-frequency topologies like synchronous rectification and LLC resonant converters.

Thermal design relies on validated junction-to-case resistance of 1.3 °C/W per diode and 0.45 °C/W inter-diode coupling. The device requires through-hole mounting with 0.4–0.6 N·m torque; surface-mount soldering of the metal slug is explicitly prohibited per ST's mounting guidelines.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum repetitive reverse blocking voltage per diode; sets hard limit for input voltage derating in flyback or forward converters
I_F(AV)	2 × 25 A - average forward current rating per diode at T_C = 120 °C; defines continuous output capability in dual-channel rectification
V_F(typ)	0.64 V @ 25 A, 125 °C - ultralow conduction loss enabling >90% efficiency in 12 V/24 V output SMPS
T_j(max)	150 °C - maximum junction temperature; enables operation under high ambient + self-heating conditions without thermal runaway
R_th(j-c)	1.3 °C/W per diode - quantifies thermal path from junction to case; used with heatsink R_th(c-a) to calculate total thermal resistance
I_FSM	250 A @ 10 ms half-sine - surge rating supports inrush current handling during cold-start in server power supplies
I_R	15 µA @ 70 V, 25 °C - low leakage preserves efficiency in standby mode and reduces standby power loss

Pinout & Package

STPS50U100CT uses a 3-pin TO-220AB package with isolated metal tab (cathode-connected). Pin 1 (A1) and Pin 2 (A2) are separate anodes; Pin 3 (K) is the common cathode. The metal tab serves as thermal interface and must be electrically isolated unless referenced to cathode potential.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first Schottky diode; connects to primary-side switching node in dual-output or interleaved rectification
A2	Anode 2	Input terminal for second Schottky diode; enables independent control or parallel operation with A1
K	Common Cathode	Shared output node; ties both diodes to positive rail; requires low-inductance layout to minimize switching noise

Key Features

Feature	Design Value
ULVF™ technology	Reduces V_F by up to 0.15 V vs. standard Schottky diodes at 25 A, cutting conduction loss by ~22% in 12 V output rails
Dual-diode integration	Enables compact dual-output or phase-interleaved rectification without discrete component matching or layout skew
Thermally coupled structure	0.45 °C/W coupling resistance allows accurate thermal modeling when both diodes conduct simultaneously
TO-220AB mechanical robustness	Rated for 0.4–0.6 N·m mounting torque; ensures stable thermal contact under vibration and thermal cycling in industrial power supplies

Applications

Notebook Adapter Power Supply

Server SMPS Secondary Side

Use Scenario: 19 V/4.74 A AC-DC adapter with active PFC and LLC resonant converter.

IC Role / Device Role / Timing Role: Dual-channel synchronous rectifier replacing MOSFETs in secondary-side full-wave configuration.

Use Value: Achieves >92% efficiency at full load by minimizing V_F-based losses while simplifying gate drive circuitry.

Use Scenario: 12 V/120 A redundant power module in 1U server PSU.

IC Role / Device Role / Timing Role: Common-cathode dual rectifier for parallel 12 V output rails with shared thermal management.

Use Value: Enables 2 × 25 A current sharing with matched V_F drift over temperature, reducing heatsink size by 30% vs. discrete diodes.

Game Console Power Adapter

Desktop PC ATX +12 V Rail

Use Scenario: 12 V/15 A external adapter for high-performance gaming console with dynamic load steps.

IC Role / Device Role / Timing Role: Primary rectifier in quasi-resonant flyback topology with snubber-assisted voltage clamping.

Use Value: Low V_F and fast recovery (<10 ns) suppress ringing and EMI, meeting CISPR-32 Class B limits without added filtering.

Use Scenario: +12 V main rail rectification in ATX v2.4 compliant desktop PSU with dual +12 V outputs.

IC Role / Device Role / Timing Role: Dual-anode configuration supports independent regulation of +12VA and +12VB rails via separate transformer secondaries.

Use Value: Eliminates need for two separate TO-220 devices, reducing PCB area by 40% and improving thermal symmetry across rails.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS60H100CG	Higher I_F(AV) (2 × 30 A), same V_RRM, but TO-247 package; R_th(j-c) = 0.9 °C/W per diode	Requires larger heatsink footprint; better suited for 1 kW+ server PSUs with forced-air cooling	Select when >50 A combined output current or lower thermal resistance is required; not drop-in due to package change
Vishay VS-50CPH07	Same TO-220AB package, 100 V, 2 × 25 A, but V_F = 0.72 V typ. @ 25 A/125 °C; no ULVF™ designation	Higher conduction loss increases junction temperature by ~8 °C at full load, requiring derating in sealed enclosures	Choose for cost-sensitive designs where <0.5% efficiency gain is non-critical and thermal margin is ample

Compared with STPS60H100CG and VS-50CPH07, STPS50U100CT uniquely balances ultra-low V_F, TO-220AB form factor, and validated thermal coupling - making it optimal for space-constrained, high-efficiency 300–600 W adapters where thermal symmetry and layout simplicity are prioritized over raw current headroom.

Availability

STPS50U100CT is available at Aetrix Electronics and suitable for notebook adapters, server SMPS, game console power supplies, and desktop ATX +12 V rail designs requiring stable component supply and consistent ULVF™ performance across production batches.

Supply support for STPS50U100CT 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, digital, and mixed-signal ICs for automotive, industrial, and power applications.

The STPS series targets high-efficiency power conversion, with ULVF™ Schottky rectifiers specifically engineered to meet ENERGY STAR® v6.0, DoE Level VI, and CoC Tier 2 efficiency mandates in consumer and datacenter power supplies.

FAQ

Is STPS50U100CT suitable for synchronous rectification circuits?

No - STPS50U100CT is a passive Schottky diode rectifier, not a synchronous rectifier IC. It replaces MOSFET-based synchronous rectifiers in topologies where gate drive complexity or cost outweighs the ~3–5% efficiency gain of active rectification. Its ULVF™ low V_F makes it competitive in medium-power applications up to 600 W.

What is the correct mounting procedure for the TO-220AB package?

Mount STPS50U100CT using through-hole insertion with the metal tab secured to a heatsink using M3 screws and thermal interface material. Apply torque between 0.4–0.6 N·m. Surface-mount soldering of the metal slug is strictly prohibited per ST's datasheet - doing so risks die delamination and premature failure due to thermal stress.

Does this device require an external snubber circuit?

Yes - ST explicitly recommends an RC clamping snubber in parallel with STPS50U100CT to suppress voltage overshoot during reverse recovery. This is critical in high-dV/dt flyback and forward converters where peak reverse voltage must remain below the 100 V V_RRM rating to prevent avalanche-induced degradation.

How does thermal coupling affect derating when both diodes conduct simultaneously?

When both diodes conduct, junction temperature rise is calculated as ΔT_j(diode 1) = P(diode1) × R_th(j-c) + P(diode2) × R_th(c), where R_th(c) = 0.45 °C/W. This coupling effect raises each diode's T_j by up to 11.25 °C at full load, requiring 10–15% current derating versus single-diode operation to maintain T_j ≤ 150 °C.

STPS50U100CT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io) (per Diode):: 25A

Voltage - Forward (Vf) (Max) @ If:: 730 mV @ 25 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 200 µA @ 100 V

Operating Temperature - Junction:: 150°C (Max)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STPS50U100CT FAQ

1.How can I place an order for STPS50U100CT through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS50U100CT 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 STPS50U100CT reliable?

The price and inventory of STPS50U100CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS50U100CT is usually 5 days.

3.What payment methods are accepted for STPS50U100CT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS50U100CT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS50U100CT?

STPS50U100CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS50U100CT 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 STPS50U100CT?

For technical support, including STPS50U100CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS50U100CT requirements.

6.How does Aetrix verify that STPS50U100CT is sourced from the original manufacturer or authorized distributors?

All STPS50U100CT 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 STPS50U100CT meets industry standards.

7.What is the process for return or replacement of STPS50U100CT?

All STPS50U100CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS50U100CT, 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 STPS50U100CT part is unused and in its original packaging.

Return procedure for STPS50U100CT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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