Infineon Technologies IDB12E120ATMA1

Overview

IDB12E120 from Infineon Technologies is a 1200 V, 12 A fast-switching Emitter Controlled Diode (ECD) optimized for high-efficiency soft-switching in industrial power converters. It delivers 1.65 V forward voltage at 12 A and 25 °C, 150 ns reverse recovery time at 25 °C, and low 1200 nC reverse recovery charge - enabling reduced switching losses in PFC and inverter stages of solar inverters and UPS systems.

For engineers reviewing the IDB12E120 datasheet, IDB12E120 pinout, IDB12E120 application, or IDB12E120 equivalent, key selection criteria include its PG-TO263-3-2 package thermal resistance (R_thJC = 1.3 K/W), softness factor (S = 5 at 25 °C), and parallel operation capability enabled by positive temperature coefficient of V_F.

Technical Context

The IDB12E120 employs Infineon's proprietary Emitter Controlled technology to achieve controlled carrier lifetime modulation, resulting in inherently soft reverse recovery with minimal oscillation and EMI. Its dynamic behavior is characterized across temperature (25–150 °C) and di/dt (200–800 A/µs), maintaining stable trr ≤ 225 ns and Qrr ≤ 2025 nC even at Tj = 150 °C.

Unlike conventional fast recovery diodes, it features a monolithic structure with integrated emitter control region that ensures uniform current distribution and enables reliable paralleling without external balancing components - critical for high-current modular converter designs.

Key Specifications

Pinout & Package

Package: PG-TO263-3-2 - surface-mount variant of TO-263 with isolated drain pad, optimized for PCB thermal management via large copper area (6 cm² recommended). Pin 1: NC (no connection); Pin 2: Cathode (C); Pin 3: Anode (A).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage fast-recovery diode applications.

Compared with IDP12E120, the IDB12E120 offers superior thermal resistance and SMT compatibility; versus STTH12-12W, it trades raw speed for robust soft switching and lower system-level EMI filtering cost.

Availability

IDB12E120 is available at Aetrix Electronics and suitable for solar photovoltaic inverters, uninterruptible power supplies, and industrial motor drives requiring stable component supply, long-term lifecycle support, and RoHS-compliant SMT packaging.

Supply support for IDB12E120 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.

IDB12E120 belongs to Infineon's Emitter Controlled Diode (ECD) product line, engineered specifically for soft-switching high-power converters where low EMI, paralleling reliability, and thermal efficiency are critical design constraints.

FAQ

What is the maximum junction temperature and how does it affect derating?

The IDB12E120 has a T_jmax of 150 °C. At T_C = 90 °C, its continuous forward current derates to 17 A (from 28 A at 25 °C), and power dissipation drops to 46 W (from 96 W). Derating curves on Page 4 of the datasheet define exact IF vs. TC and Ptot vs. TC relationships for thermal design validation.

Can IDB12E120 be paralleled without external current-sharing resistors?

Yes - its positive temperature coefficient of forward voltage ensures inherent current balancing. At 12 A, V_F increases with junction temperature, causing hotter devices to conduct less current. This behavior is verified across 25–150 °C and enables stable parallel operation without ballasting components.

Is the NC pin electrically isolated and what happens if it's grounded?

Pin 1 is fully electrically isolated (NC) and not internally connected. Grounding or routing it to any potential introduces no functional effect but risks mechanical stress on the bond wire or contamination of the isolation barrier. It must remain unconnected per Infineon's assembly guidelines.

How does reverse recovery softness factor (S) impact EMI in high-frequency inverters?

S ≥ 5 indicates a gradual current decay during turn-off, reducing di/dt-induced voltage spikes and high-frequency ringing. In 100 kHz inverters, this lowers conducted EMI amplitude by 8–12 dB in the 30–100 MHz band, easing compliance with CISPR 11 Class A limits without added ferrite beads or RC snubbers.