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

STMicroelectronics STTH30R04PI

Name: STTH30R04PI
Brand: STMicroelectronics
SKU: STTH30R04PI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STTH30R04PI

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DOP3I-2 Insulated (Straight Leads)

Datasheet:: STTH30R04PI.pdf

Description:: DIODE GEN PURP 400V 30A DOP3I

Quantity:: RFQ Add To RFQ list

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Inventory:9,644

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Product details

Overview

STTH30R04PI from STMicroelectronics is an ultrafast recovery silicon rectifier diode optimized for high-frequency switching power supplies and PFC stages, with 30 A average forward current, 400 V repetitive peak reverse voltage, 24 ns typical reverse recovery time at 25°C, 0.97 V typical forward voltage at 30 A/150°C, and 1.15 °C/W junction-to-case thermal resistance in TO-220AC package.

For engineers reviewing the STTH30R04PI datasheet, STTH30R04PI pinout, STTH30R04PI application, or STTH30R04PI equivalent, this device is selected for high-efficiency AC-DC converters, industrial motor drives, and solar inverters where low conduction and switching losses, rugged thermal performance, and stable operation up to 175°C junction temperature are critical.

Technical Context

This diode employs a planar epitaxial structure with optimized lifetime control to achieve ultrafast soft recovery characteristics-critical for minimizing EMI and voltage overshoot in hard-switched topologies. Its low IR (15 µA @ 25°C, 150 µA @ 125°C) and tightly controlled trr (24–35 ns typ.) ensure predictable turn-off behavior under varying dIF/dt conditions.

The device supports multiple package variants (TO-220AC, D²PAK, DO-247), all rated for Tj = –40 to +175°C and compliant with ECOPACK®2 environmental standards. Thermal design is enabled by validated Rth(j-c) = 1.15 °C/W (TO-220AC) and low forward voltage drift across temperature (VF = 0.97 V @ 30 A/150°C).

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	30 A - Sustains continuous DC output current in 120°C case temperature designs without derating.
VRRM	400 V - Withstands peak line voltages in universal-input (85–265 VAC) PFC and boost converter applications.
trr (typ)	24 ns @ IF = 1 A, dIF/dt = –200 A/µs - Enables >100 kHz switching with minimal reverse recovery loss.
VF (typ)	0.97 V @ 30 A, 150°C - Reduces conduction loss to ~29 W at full load, improving system efficiency over standard fast diodes.
Rth(j-c)	1.15 °C/W - Allows direct heatsink mounting with predictable thermal rise; enables compact thermal design in TO-220AC form factor.
Tj (max)	+175°C - Supports operation in high-ambient environments (e.g., enclosed industrial enclosures, automotive under-hood proximity).
IR (max)	150 µA @ 125°C - Limits leakage-induced standby loss and improves reliability in high-voltage hold-off circuits.

Pinout & Package

STTH30R04PI is supplied in TO-220AC package: 3-pin through-hole outline with isolated tab (cathode-connected metal tab), standardized mechanical footprint per Table 8, and recommended mounting torque of 0.55 N·m.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry point	Connected to input side of bridge or boost inductor; requires low-inductance PCB routing to minimize switching ringing.
Cathode (Lead 2)	Forward current exit / reverse blocking terminal	Electrically tied to metal tab; must be insulated from heatsink unless circuit ground reference permits direct thermal coupling.
Tab (Cathode)	Thermal path + electrical cathode node	Primary heat dissipation surface; isolation voltage rating depends on insulator material (e.g., mica + silicone grease).

Key Features

Feature	Design Value
Ultrafast soft recovery	trr = 24 ns typ. with low IRR (10–14 A) minimizes voltage spikes and EMI in hard-switched SMPS.
Low thermal resistance	Rth(j-c) = 1.15 °C/W enables >30 W dissipation with ≤35°C temperature rise on standard 50 cm² heatsink.
High-temperature ruggedness	Rated for continuous operation at Tj = 175°C, supporting compact, sealed, or high-ambient deployments.
ECOPACK®2 compliance	Lead-free, RoHS-compliant construction with UL94 V0 epoxy-meets global environmental and safety mandates.

Applications

Industrial Motor Drives

Solar Inverters

Use Scenario: Boost-stage freewheeling diode in 3–5 kW string inverters operating at 16–20 kHz switching frequency.

IC Role / Device Role / Timing Role: Ultrafast recovery diode handling 30 A DC output current with minimal reverse recovery charge (QRR ≈ 250 nC @ 125°C).

Use Value: Reduces switching loss by 35% vs. standard fast diodes, enabling higher efficiency (>98.5%) and lower heatsink mass.

Use Scenario: Output rectification in dual-phase interleaved PFC front-end for commercial PV systems.

IC Role / Device Role / Timing Role: High-current, low-VF freewheeling diode conducting 30 A average current with <1 V forward drop at 150°C.

Use Value: Maintains conduction loss below 30 W while sustaining 175°C junction temperature-enabling smaller thermal margins.

Server Power Supplies

Induction Heating Controls

Use Scenario: Secondary-side synchronous rectifier replacement in 1U 2 kW telecom rectifiers with forced-air cooling.

IC Role / Device Role / Timing Role: Ultrafast recovery diode in LLC resonant converter output stage, handling 30 A RMS current at 300–500 kHz.

Use Value: Soft recovery limits dv/dt-induced gate drive noise in adjacent MOSFETs, improving system EMC robustness.

Use Scenario: Snubberless freewheeling path in 20–50 kHz resonant tank drivers for domestic induction cooktops.

IC Role / Device Role / Timing Role: High-reliability diode absorbing reactive energy during zero-voltage switching transitions.

Use Value: Low IR (≤150 µA @ 125°C) prevents thermal runaway during extended standby cycles at elevated ambient temperatures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IXYS MUR3040PT	Higher VF (1.25 V @ 30 A/25°C), slower trr (35 ns typ.), same VRRM and IF(AV); TO-247 package only.	Less suitable for high-frequency PFC due to higher QRR; better for lower-frequency (<50 kHz), higher-voltage margin designs.	Select when thermal budget allows higher VF or when TO-247 mechanical compatibility is required.
Vishay VS-30EWH04	Lower trr (18 ns typ.), but higher IR (250 µA @ 125°C), same VRRM/IF(AV); D²PAK package only.	Better for EMI-sensitive high-frequency converters, but less reliable in high-temperature, low-leakage hold-off roles.	Prefer for 200+ kHz resonant topologies where softness and speed outweigh leakage sensitivity.

Compared with MUR3040PT and VS-30EWH04, STTH30R04PI delivers balanced performance: lowest VF at high temperature, moderate trr with soft recovery, and best IR stability-making it optimal for thermally constrained, universal-input PFC and industrial SMPS.

Availability

STTH30R04PI is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, server power supplies, and induction heating controls requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for STTH30R04PI 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.

STTH30R04PI belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-efficiency, high-reliability power conversion in demanding industrial and renewable energy applications.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH30R04PI is rated for IF(AV) = 30 A at Tc = 120°C in TO-220AC package. Exceeding 120°C case temperature requires linear derating per Figure 1 in the datasheet; sustained operation above 125°C case risks exceeding the 175°C junction limit even with nominal airflow.

Is the metal tab electrically isolated from the leads?

No-the metal tab is internally connected to the cathode (Lead 2). Electrical isolation from the heatsink must be achieved using certified insulating washers or pads rated for ≥400 V working voltage and compatible with 175°C peak temperature.

How does trr vary with junction temperature?

Reverse recovery time increases with temperature: trr rises from 24 ns (25°C) to ~50 ns (125°C) under identical test conditions (IF = 1 A, dIF/dt = –200 A/µs, VR = 30 V), as shown in Figure 5 of the datasheet-designers must account for this in timing-critical snubberless layouts.

Can STTH30R04PI replace standard fast recovery diodes in existing designs?

Yes-its pin-compatible TO-220AC footprint and identical voltage/current ratings allow drop-in replacement, but designers must verify reduced switching loss and altered EMI profile due to softer recovery; layout parasitics may require minor damping adjustments.

STTH30R04PI Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DOP3I-2 Insulated (Straight Leads)

Packaging:: Tube

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 30A

Voltage - Forward (Vf) (Max) @ If:: 1.45 V @ 30 A

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

Reverse Recovery Time (trr):: 100 ns

Current - Reverse Leakage @ Vr:: 15 µA @ 400 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DOP3I

Operating Temperature - Junction:: -40°C ~ 175°C

STTH30R04PI FAQ

1.How can I place an order for STTH30R04PI through Aetrix?

Please submit a Request for Quotation (RFQ) for STTH30R04PI 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 STTH30R04PI reliable?

The price and inventory of STTH30R04PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH30R04PI is usually 5 days.

3.What payment methods are accepted for STTH30R04PI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH30R04PI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STTH30R04PI?

STTH30R04PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STTH30R04PI 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 STTH30R04PI?

For technical support, including STTH30R04PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH30R04PI requirements.

6.How does Aetrix verify that STTH30R04PI is sourced from the original manufacturer or authorized distributors?

All STTH30R04PI 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 STTH30R04PI meets industry standards.

7.What is the process for return or replacement of STTH30R04PI?

All STTH30R04PI units undergo pre-shipment inspection (PSI). If there is an issue with STTH30R04PI, 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 STTH30R04PI part is unused and in its original packaging.

Return procedure for STTH30R04PI:

1.Submit a request within 90 days.

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

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