STMicroelectronics BYT12P-1000

Overview

BYT12P-1000 from STMicroelectronics is a fast recovery rectifier diode in TO-220AC plastic package with cathode connected to case, rated for 1000 V repetitive peak reverse voltage, 12 A average forward current at 100°C (δ = 0.5), and 155 ns typical reverse recovery time at 25°C with diF/dt = −15 A/µs - used as freewheeling diode in motor control inverters and SMPS rectification stages.

For engineers reviewing the BYT12P-1000 datasheet, BYT12P-1000 pinout, BYT12P-1000 application, or BYT12P-1000 equivalent, key selection criteria include verified trr ≤ 155 ns, VRRM = 1000 V, IF(AV) = 12 A at Tcase = 100°C, Rth(j–c) = 2 °C/W, and cathode-to-case thermal/mechanical integration for heatsink-mounted switching power stages.

Technical Context

This diode employs optimized epitaxial silicon structure and lifetime control to achieve fast, soft recovery with low noise turn-off and minimal switching losses. Its design targets high-voltage DC-link applications where rapid current commutation and low reverse recovery charge (Qrr) are critical to reduce snubber stress and EMI.

Rated for 75 A non-repetitive surge current (tp = 10 ms, sinusoidal), it supports transient overload handling in industrial converters. The TO-220AC package provides direct case conduction cooling with cathode electrically tied to the metal tab, enabling simplified layout and reduced parasitic inductance in high-diF/dt circuits.

Key Specifications

Pinout & Package

TO-220AC plastic package with isolated mounting hole; cathode terminal electrically and thermally connected to the metal case (tab). Mounting torque: 80 cm·N recommended, max 100 cm·N.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BYT12P-1000, STTH12R06D offers faster recovery but sacrifices 400 V reverse voltage headroom, while VS-12EWH06FN-M3 adds electrical isolation at the cost of voltage rating - making BYT12P-1000 uniquely suited for 800–1000 V DC bus freewheeling where both voltage margin and moderate speed are essential.

Availability

BYT12P-1000 is available at Aetrix Electronics and suitable for motor control inverters, offline SMPS rectifiers, and industrial DC link clamping circuits requiring stable component supply and long-term BOM continuity.

Supply support for BYT12P-1000 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

BYT12P-1000 belongs to ST's high-voltage fast recovery diode product line, engineered specifically for efficiency-critical power conversion stages in industrial motor drives and switched-mode power supplies.

FAQ

Is BYT12P-1000 still in active production?

No - BYT12P-1000 is marked "Obsolete Product(s)" in the official STMicroelectronics datasheet (Ed: 1B, October 1999). It is no longer manufactured, but Aetrix Electronics maintains legacy inventory with full traceability and supports end-of-life transition planning for existing designs.

Can BYT12P-1000 be used with a heatsink without electrical isolation?

Yes - the cathode is internally connected to the metal case/tab, so direct mounting to an earthed or common-cathode heatsink is electrically valid. However, if the cathode node is not at system ground potential, an insulating pad and shoulder washer must be used to prevent short circuits.

What is the maximum recommended mounting torque for the TO-220AC package?

The datasheet specifies a recommended torque value of 80 cm·N (7.1 in·lb) and a maximum torque of 100 cm·N (8.9 in·lb). Exceeding 100 cm·N risks mechanical damage to the package or internal bond wires, potentially causing premature failure under thermal cycling.

How does the 2 °C/W Rth(j–c) translate to real-world thermal performance?

With 25 W power dissipation (P = VF × IF(AV) + resistive losses), Rth(j–c) = 2 °C/W yields a 50°C junction-to-case temperature rise. Combined with heatsink Rth(c–a), this determines total junction-to-ambient rise - e.g., adding 1.5 °C/W heatsink yields 85°C rise at 25 W, requiring derating above 100°C ambient.