STMicroelectronics BYT261PIV-400

Overview

BYT261PIV-400 from STMicroelectronics is a fast recovery dual common-cathode rectifier diode in ISOTOP package, rated for 400 V repetitive peak reverse voltage, 60 A average forward current (Tc = 70°C), and 50 ns maximum reverse recovery time (trr) at 100°C. It delivers low switching losses and low-noise turn-off, optimized for free-wheeling in high-frequency SMPS and motor control inverters.

For engineers reviewing the BYT261PIV-400 datasheet, BYT261PIV-400 pinout, BYT261PIV-400 application, or BYT261PIV-400 equivalent, key selection criteria include its dual-diode configuration, insulated ISOTOP thermal performance (Rth(j–c) = 0.45 °C/W per diode), 2500 VRMS isolation rating, and validated operation up to 150°C junction temperature.

Technical Context

This device integrates two fast recovery diodes sharing a common cathode terminal in a single insulated plastic package. Its design targets high-efficiency energy recovery in hard-switched converters where rapid di/dt (up to –480 A/µs) and low reverse recovery charge (Qrr) are critical to minimize snubber losses and EMI.

The ISOTOP package provides galvanic isolation (2500 VRMS), low parasitic inductance (<5 nH), and capacitance (45 pF), enabling stable operation in high-dV/dt environments typical of IGBT-based motor drives and telecom PSUs.

Key Specifications

Pinout & Package

BYT261PIV-400 uses the ISOTOP (Insulated Super Top) package - a molded plastic housing with integrated insulating base, four mounting holes (M4), and metal terminals for anode (K1, K2) and common cathode (A1, A2). The package weighs 28 g (without screws) and requires 1.3 N·m torque for secure heatsink attachment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH120R04DJF and MBR6045CT, BYT261PIV-400 uniquely combines dual-anode freedom, 400 V rating, ISOTOP insulation, and sub-50 ns trr-making it irreplaceable in space-constrained, high-isolation industrial inverters requiring dual-leg freewheeling.

Availability

BYT261PIV-400 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, uninterruptible power systems, and renewable energy inverters requiring stable component supply, long-lifecycle assurance, and certified traceable sourcing.

Supply support for BYT261PIV-400 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

BYT261PIV-400 belongs to ST's FAST RECOVERY RECTIFIER DIODES product line, engineered specifically for high-efficiency, high-reliability free-wheeling and output rectification in switch-mode power conversion systems operating above 50 kHz.

FAQ

What is the maximum allowable case temperature for continuous 60 A operation?

The datasheet specifies IF(AV) = 60 A at Tc = 70°C. Exceeding this case temperature reduces allowable current linearly per the derating curve in Figure 3. At Tc = 80°C, maximum IF(AV) drops to approximately 52 A. Thermal design must ensure heatsink interface maintains ≤70°C at the ISOTOP mounting surface under full load and ambient conditions.

Can BYT261PIV-400 be used in parallel with another unit for higher current?

No - the device is not characterized or recommended for paralleling. Its dual-diode structure shares a common cathode but lacks matched dynamic parameters (e.g., trr, Qrr) between legs for forced current sharing. For >60 A applications, use a single higher-rated part like STTH120R04DJF or implement separate discrete diodes with individual gate/base drive control.

Does the ISOTOP package require thermal grease between the base and heatsink?

Yes - STMicroelectronics recommends thermally conductive grease or phase-change pad between the ISOTOP insulated base and heatsink to minimize Rth(c–heatsink). The 0.45 °C/W Rth(j–c) value assumes optimal thermal interface; omitting grease increases total thermal resistance by ≥0.3 °C/W, risking premature thermal shutdown at rated current.

How does the 2500 VRMS isolation rating impact PCB layout?

The 2500 VRMS rating permits direct mounting on conductive heatsinks without additional insulating hardware, but creepage and clearance distances on the PCB must still comply with end-equipment safety standards (e.g., IEC 62368). Keep high-voltage anode traces ≥4 mm from grounded copper and avoid solder mask over isolation barriers to maintain dielectric integrity.