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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics STTH40P03SFP

Name: STTH40P03SFP
Brand: STMicroelectronics
SKU: STTH40P03SFP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH40P03SFP

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-220-3 Full Pack

Datasheet:: STTH40P03SFP.pdf

Description:: DIODE GEN PURP 300V 40A TO220FP

Quantity:: RFQ Add To RFQ list

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Inventory:6,611

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Product details

Overview

STTH40P03SFP from STMicroelectronics is an ultrafast recovery power rectifier optimized for energy recovery in plasma display panel (PDP) circuits. It delivers 40 A average forward current, 300 V repetitive peak reverse voltage, and 2.5 V typical forward peak voltage (V_FP) at 100% rated current, with soft recovery (S-factor = 0.5) and 175 °C maximum junction temperature.

For engineers reviewing the STTH40P03SFP datasheet, STTH40P03SFP pinout, STTH40P03SFP application, or STTH40P03SFP equivalent, key selection criteria include reverse recovery time (t_rr ≤ 60 ns at dI_F/dt = 1000 A/µs), surge capability (I_FRM = 120 A), thermal resistance (R_th(j-c) = 4.5 °C/W), and TO-220FPAB package compatibility with conduction-cooled PDP sustain stage layouts.

Technical Context

This diode operates in high-frequency energy recovery topologies where rapid charge evacuation (t_clamp) minimizes switching losses during PDP sustain phase transitions. Its soft recovery behavior suppresses EMI by limiting di/dt-induced voltage spikes during turn-off.

Designed specifically for DERC (Dynamic Energy Recovery Circuit) configurations, it replaces slower standard recovery diodes to reduce total power loss-conduction loss modeled as P = 0.88 × I_F(AV) + 0.0135 × I_F(RMS)²-and improve luminous efficiency through lower forward voltage drop (V_F = 0.9 V typ. at 40 A, T_j = 125 °C).

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	300 V - Withstands repetitive reverse voltage up to 300 V in PDP sustain bus applications without breakdown.
I_F(AV)	40 A - Sustains continuous forward current of 40 A under heatsinked conduction cooling per TO-220FPAB mounting.
t_rr	≤60 ns - Ultrafast reverse recovery enables operation at >200 kHz switching frequencies in energy recovery loops.
V_F (typ)	0.9 V @ 40 A, 125 °C - Low conduction loss directly reduces thermal load and improves system efficiency in high-duty-cycle PDP drivers.
S-factor	0.5 - Soft recovery limits EMI generation and prevents voltage overshoot during inductive turn-off in resonant tank circuits.
R_th(j-c)	4.5 °C/W - Thermal resistance from junction to case defines minimum heatsink requirement for 175 °C T_j operation.
I_FRM	120 A - Peak non-repetitive forward surge current supports transient energy dump during PDP panel discharge events.

Pinout & Package

STTH40P03SFP uses the TO-220FPAB package: insulated plastic case with isolated tab, 3-pin vertical lead configuration, and screw-mount compatible footprint (mechanical data per Figure 12). Mounting torque: 0.55 m·N recommended, max 0.70 m·N.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to PDP sustain inductor output; must handle 120 A surge peaks with minimal parasitic inductance.
Cathode (K)	Forward current exit point	Connected to high-side switch node; low-inductance routing critical to suppress V_FP overshoot during t_clamp.
Case (Isolated Tab)	Thermal path / mechanical ground	Electrically isolated metal tab provides primary heat transfer path to heatsink; no electrical connection required.

Key Features

Feature	Design Value
Ultrafast recovery	t_rr ≤ 60 ns enables >200 kHz energy recovery switching without excessive switching loss or ringing.
Soft recovery profile	S-factor = 0.5 ensures controlled di/dt during turn-off, reducing EMI and stress on adjacent MOSFETs.
High junction temperature rating	T_j(max) = 175 °C allows operation in compact, thermally constrained PDP chassis without derating.
Optimized for DERC topology	Low V_FP (2.5 V) and fast t_fr (<150 ns) minimize clamp loss and sustain-stage dead-time penalties.

Applications

Plasma Display Panel (PDP) Energy Recovery

PDP Sustain Stage Clamp Diode

Use Scenario: Recovers inductive energy from sustain inductors during PDP panel discharge cycles.

IC Role / Device Role / Timing Role: Ultrafast rectifier in Dynamic Energy Recovery Circuit (DERC), conducting only during t_clamp intervals (~500 ns).

Use Value: Reduces total power loss by 35% vs. standard recovery diodes, enabling higher brightness at same thermal budget.

Use Scenario: Clamps voltage spike across high-side MOSFET during PDP sustain switch turn-off.

IC Role / Device Role / Timing Role: Fast-recovery clamp diode placed between MOSFET drain and sustain bus, active for <100 ns.

Use Value: Limits V_DS overshoot to <1.2×V_DD, eliminating need for snubbers and reducing MOSFET stress.

High-Frequency Resonant Converters

Industrial Inductive Load Snubber

Use Scenario: Used in LLC or series-resonant DC-DC converters operating above 150 kHz.

IC Role / Device Role / Timing Role: Secondary-side rectifier handling high di/dt waveforms with minimal reverse recovery charge (Q_rr < 35 nC).

Use Value: Enables >94% converter efficiency at 200 kHz by cutting switching loss contribution by 60%.

Use Scenario: Suppresses voltage transients in solenoid, relay, or motor drive circuits.

IC Role / Device Role / Timing Role: Freewheeling diode across inductive loads, selected for soft turn-off to prevent contact arcing.

Use Value: Extends relay contact life by 4× compared to standard FRD due to reduced dv/dt-induced stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH30L06D	600 V V_RRM, 30 A I_F(AV), TO-220FPAB, t_rr = 65 ns, R_th(j-c) = 4.5 °C/W	Higher voltage rating but lower current; suitable for 600 V bus designs with reduced power density.	Select when system requires ≥600 V reverse blocking but can accept 25% lower average current.
IXYS MUR460E	600 V V_RRM, 4 A I_F(AV), DO-201AD, t_rr = 50 ns, R_th(j-c) = 25 °C/W	Lower current rating and higher thermal resistance; not a direct replacement for 40 A PDP use.	Only viable for low-power auxiliary clamping or signal-level recovery where heatsinking is impractical.

Compared with STTH40P03SFP, STTH30L06D trades current capacity for higher voltage headroom while retaining identical package and thermal performance; IXYS MUR460E offers faster t_rr but cannot support PDP-level current or thermal demands without redesign.

Availability

STTH40P03SFP is available at Aetrix Electronics and suitable for plasma display panel energy recovery, high-frequency resonant converters, and industrial inductive load snubbing requiring stable component supply and consistent TO-220FPAB mechanical fit.

Supply support for STTH40P03SFP 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 consumer markets.

STTH40P03SFP belongs to ST's Ultrafast Power Rectifier product line, engineered specifically for high-efficiency energy recovery in plasma display and resonant power conversion systems.

FAQ

What is the maximum allowable case temperature for STTH40P03SFP under continuous operation?

The TO-220FPAB package has a maximum junction temperature of 175 °C and a junction-to-case thermal resistance of 4.5 °C/W. With 40 A average forward current and typical V_F ≈ 1.15 V at 125 °C, power dissipation is ~46 W. To maintain T_j ≤ 175 °C, case temperature must remain ≤ 154 °C-requiring a heatsink with ≤ 0.48 °C/W thermal resistance.

Can STTH40P03SFP replace STTH40P03ST in existing TO-220AB designs?

No-STTH40P03SFP uses the TO-220FPAB package with an electrically isolated tab and different mounting hole spacing (L3 = 28.6–30.6 mm vs. TO-220AB's L3 = 16.4 mm typ.). Mechanical interference and thermal interface mismatch will occur; PCB layout and heatsink must be redesigned for TO-220FPAB dimensions and isolation requirements.

How does the softness factor of 0.5 impact EMI in PDP applications?

A softness factor of 0.5 means reverse recovery current decays linearly rather than abruptly, limiting di/dt during turn-off to <200 A/µs. This reduces high-frequency spectral content above 30 MHz by >15 dB, easing compliance with CISPR-22 Class B radiated emissions limits in PDP chassis without added filtering.

Is STTH40P03SFP suitable for use in automotive infotainment displays?

No-STTH40P03SFP is qualified to industrial temperature range (–65 °C to +175 °C) but lacks AEC-Q101 qualification, PPAP documentation, or automotive-grade traceability. It is designed for commercial PDP systems, not automotive environments subject to vibration, extended temperature cycling, or functional safety requirements.

STTH40P03SFP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 300 V

Current - Average Rectified (Io):: 40A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 40 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 50 µA @ 300 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220FP

Operating Temperature - Junction:: 175°C (Max)

STTH40P03SFP FAQ

1.How can I place an order for STTH40P03SFP through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH40P03SFP 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 STTH40P03SFP reliable?

The price and inventory of STTH40P03SFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH40P03SFP is usually 5 days.

3.What payment methods are accepted for STTH40P03SFP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH40P03SFP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH40P03SFP?

STTH40P03SFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH40P03SFP 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 STTH40P03SFP?

For technical support, including STTH40P03SFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH40P03SFP requirements.

6.How does Aetrix verify that STTH40P03SFP is sourced from the original manufacturer or authorized distributors?

All STTH40P03SFP 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 STTH40P03SFP meets industry standards.

7.What is the process for return or replacement of STTH40P03SFP?

All STTH40P03SFP units undergo pre-shipment inspection (PSI). If there is an issue with STTH40P03SFP, 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 STTH40P03SFP part is unused and in its original packaging.

Return procedure for STTH40P03SFP:

1.Submit a request within 90 days.

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

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