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

STMicroelectronics BYT30PI-400RG

Name: BYT30PI-400RG
Brand: STMicroelectronics
SKU: BYT30PI-400RG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BYT30PI-400RG

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DOP3I-2 Insulated (Straight Leads)

Datasheet:: BYT30PI-400RG.pdf

Description:: DIODE GEN PURP 400V 30A DOP3I

Quantity:: RFQ Add To RFQ list

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Inventory:3,551

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Product details

Overview

BYT30PI-400RG from STMicroelectronics is a fast recovery rectifier diode in an isolated DOP3I plastic package, rated for 400 V repetitive peak reverse voltage, 30 A average forward current at Tc = 60°C, and 100 ns typical reverse recovery time (trr) at IF = 1 A, diF/dt = −15 A/µs, VR = 30 V. It serves as a freewheeling diode in motor control circuits and high-frequency SMPS rectification where low switching losses and low noise turn-off are critical.

For engineers reviewing the BYT30PI-400RG datasheet, BYT30PI-400RG pinout, BYT30PI-400RG application, or BYT30PI-400RG equivalent, key selection criteria include verified trr ≤ 100 ns, VRRM = 400 V with 2500 VRMS isolation rating, junction-to-case thermal resistance of 1.8 °C/W, and suitability for high-diF/dt (up to −240 A/µs) switching environments.

Technical Context

This diode employs optimized silicon epitaxial structure and lifetime control to achieve fast, soft recovery with low reverse recovery charge (Qrr) and minimal tail current-critical for reducing EMI and voltage overshoot in hard-switched converters. Its insulated DOP3I package integrates creepage/clearance for 2500 VRMS isolation, enabling direct mounting on heatsinks without additional insulation.

Designed for unidirectional conduction in DC-link and output stages, it operates across −40°C to +150°C junction temperature range and supports surge currents up to 350 A (10 ms, sinusoidal). The device's VF vs. IF curve follows VF = 1.1 + 0.0095·IF (V), enabling precise conduction loss calculation in thermal design.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	400 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in bridge or freewheeling configurations
IF(AV)	30 A @ Tc = 60°C - Continuous DC current capability with heatsink; determines minimum heatsink sizing
trr	100 ns typ. - Measured at IF = 1 A, diF/dt = −15 A/µs, VR = 30 V; enables >100 kHz SMPS operation with low switching loss
Rth(j–c)	1.8 °C/W - Junction-to-case thermal resistance; used with heatsink Rth(c–a) to calculate max junction temperature
IRM	9 A @ diF/dt = −120 A/µs - Peak reverse recovery current; impacts snubber sizing and EMI filter design
C_j	15 pF - Junction capacitance at rated VR; contributes to high-frequency displacement current and ringing behavior
V_ISO	2500 V_RMS - Isolation voltage between case and die; eliminates need for insulating pads in heatsink mounting

Pinout & Package

Package: Isolated DOP3I plastic housing (case code DOP3I), screw-mountable with M4 thread, weight 4.52 g, recommended torque 80 cm·N. Case serves as cathode terminal; anode is lead-mounted.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead)	Forward current entry point	Connected to positive side of AC input or inductive load; must handle 350 A surge peaks
Cathode (case)	Forward current exit / heat path	Electrically isolated metal case acts as both cathode and primary thermal interface to heatsink

Key Features

Feature	Design Value
Fast soft recovery	trr = 100 ns typ., low Irr and Qrr → reduces snubber losses and voltage spikes in hard-switched topologies
High diF/dt capability	Rated for diF/dt up to −240 A/µs → supports high-frequency IGBT/MOSFET gate drive and motor phase-leg commutation
Integrated isolation	2500 V_RMS case-to-junction isolation → eliminates insulating washers, simplifies mechanical assembly and thermal path
Low noise turn-off	Controlled tail current decay and low C_j (15 pF) → minimizes RF emission during recovery, easing EMI compliance
Robust surge rating	350 A non-repetitive surge (10 ms sine) → withstands motor startup surges and short-circuit transients in industrial drives

Applications

Motor Drive Freewheeling

SMPS Output Rectification

Use Scenario: Bidirectional current path in 3-phase inverter leg with IGBTs, absorbing inductive energy during PWM off-time.

IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss, low-noise return path for motor phase current.

Use Value: 100 ns trr and soft recovery reduce voltage overshoot across IGBTs, lowering snubber component stress and improving system efficiency.

Use Scenario: Secondary-side rectification in 50–200 kHz flyback or forward converter powering telecom or server PSUs.

IC Role / Device Role / Timing Role: High-frequency rectifier handling continuous DC output current with minimal conduction + switching loss trade-off.

Use Value: Low VF (1.5 V @ 30 A, 25°C) and 1.8 °C/W Rth(j–c) enable compact heatsinking while maintaining <100°C junction rise under full load.

Industrial DC Link Clamp

UPS Inverter Stage

Use Scenario: Clamping diode across DC bus capacitors in regenerative braking systems to absorb回馈 energy.

IC Role / Device Role / Timing Role: Unidirectional clamp element conducting only during bus overvoltage events with fast response.

Use Value: 440 V VRSM rating and 350 A IFSM ensure reliable clamping during transient overvoltage without avalanche degradation.

Use Scenario: Output stage rectification in double-conversion UPS inverters operating at variable frequency (40–70 Hz).

IC Role / Device Role / Timing Role: Line-frequency rectifier with fast recovery to minimize distortion and harmonic injection into battery charging circuitry.

Use Value: Low IR (35 µA @ 25°C) and stable VF over temperature maintain regulation accuracy and reduce standby losses.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH30L04D	400 V VRRM, 30 A IF(AV), but TO-247AC package (non-isolated), Rth(j–c) = 1.0 °C/W, trr = 65 ns	Requires external insulator for heatsink mounting; better thermal performance but higher EMI risk due to faster trr	Select when lower thermal resistance is prioritized and isolation can be added externally
IXYS MBR3045CT	45 V VRRM (not 400 V), Schottky construction, VF ≈ 0.75 V, no recovery charge, but limited to low-voltage SMPS	Not suitable for 400 V bus applications; usable only in ≤48 V secondary-side rectifiers	Select only for low-VF, zero-Qrr needs below 45 V; not a voltage-compatible replacement

Compared with STTH30L04D and MBR3045CT, BYT30PI-400RG uniquely combines 400 V blocking, 2500 VRMS isolation, and 100 ns trr in one package-making it irreplaceable in space-constrained, high-isolation motor drive and industrial SMPS designs where integrated safety and predictable recovery behavior are mandatory.

Availability

BYT30PI-400RG is available at Aetrix Electronics and suitable for motor control inverters, industrial SMPS, UPS systems, and regenerative braking circuits requiring stable component supply, long-lifecycle support, and certified isolation compliance.

Supply support for BYT30PI-400RG 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, designing and manufacturing analog, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.

BYT30PI-400RG belongs to ST's high-voltage fast recovery diode product line, engineered specifically for ruggedized power conversion in industrial motor drives and high-reliability switch-mode power supplies.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The BYT30PI-400RG has a specified junction temperature range of −40°C to +150°C. For continuous operation at rated IF(AV) = 30 A, thermal design must ensure TJ does not exceed 150°C under worst-case ambient and heatsink conditions, using Rth(j–c) = 1.8 °C/W and measured case temperature.

Does the DOP3I package require an insulating pad when mounted to a heatsink?

No. The DOP3I package provides 2500 VRMS isolation between the cathode (case) and the silicon die, allowing direct mounting to grounded or floating heatsinks without thermal interface insulators-reducing thermal resistance and assembly complexity.

How is reverse recovery time (trr) measured for this diode?

trr is measured per JEDEC standards: IF = 1 A forward bias, then switched with diF/dt = −15 A/µs while applying VR = 30 V; trr is the time from 10% to 10% of reverse current (Irr) on the falling edge, yielding 100 ns typical at Tj = 25°C.

Can BYT30PI-400RG replace standard PN junction rectifiers in existing 400 V designs?

Yes-provided layout accommodates its DOP3I footprint and mounting torque (80 cm·N). Its lower trr (vs. 500–1000 ns in standard rectifiers) reduces switching losses and EMI, but may require minor snubber tuning due to faster di/dt-induced voltage spikes.

BYT30PI-400RG 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:: 1.5 V @ 30 A

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

Reverse Recovery Time (trr):: 100 ns

Current - Reverse Leakage @ Vr:: 35 µA @ 400 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DOP3I

Operating Temperature - Junction:: -40°C ~ 150°C

BYT30PI-400RG FAQ

1.How can I place an order for BYT30PI-400RG through Aetrix?

Please submit a Request for Quotation (RFQ) for BYT30PI-400RG 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 BYT30PI-400RG reliable?

The price and inventory of BYT30PI-400RG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BYT30PI-400RG is usually 5 days.

3.What payment methods are accepted for BYT30PI-400RG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BYT30PI-400RG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BYT30PI-400RG?

BYT30PI-400RG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BYT30PI-400RG 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 BYT30PI-400RG?

For technical support, including BYT30PI-400RG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BYT30PI-400RG requirements.

6.How does Aetrix verify that BYT30PI-400RG is sourced from the original manufacturer or authorized distributors?

All BYT30PI-400RG 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 BYT30PI-400RG meets industry standards.

7.What is the process for return or replacement of BYT30PI-400RG?

All BYT30PI-400RG units undergo pre-shipment inspection (PSI). If there is an issue with BYT30PI-400RG, 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 BYT30PI-400RG part is unused and in its original packaging.

Return procedure for BYT30PI-400RG:

1.Submit a request within 90 days.

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

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