Infineon Technologies D1230N18TXPSA1

Overview

D1230N18TXPSA1 from Infineon Technologies is a high-power, press-pack silicon rectifier diode designed for industrial AC/DC conversion in medium-voltage drive systems and traction inverters. It delivers 1230 A average on-state current at TC = 100 °C, 1800 V repetitive peak reverse voltage (VRRM), and 14.8 kA surge current (IFSM) with two-sided cooling. Its 0.28 mΩ slope resistance and 1.77 V forward voltage at 3.2 kA enable efficient operation in 3-phase bridge configurations for rail propulsion and grid-connected converters.

For engineers reviewing the D1230N18TXPSA1 datasheet, D1230N18TXPSA1 pinout, D1230N18TXPSA1 application, or D1230N18TXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.039 °C/W two-sided), transient thermal impedance behavior, reverse recovery charge (Qr) dependence on di/dt, and clamping force requirements (6–15 kN) for reliable pressure-contact mounting.

Technical Context

This device operates as a unidirectional, non-controlled power rectifier with no gate control or switching function. Its conduction is governed solely by applied anode-cathode voltage polarity and magnitude, with forward voltage defined by vF = A + B·iF + C·ln(iF) + D·iF² (A=−0.4216, B=3.674×10⁻⁴, C=0.2591, D=−0.01902) at Tvj = 180 °C.

Thermal performance is highly dependent on mechanical mounting: two-sided cooling yields RthJC = 0.039 °C/W, while anode- or cathode-sided cooling degrades it to 0.062–0.093 °C/W. Transient thermal impedance ZthJC follows a 5-term exponential model with time constants ranging from 0.3 ms to 411 ms, critical for short-duration overload analysis in motor drive fault conditions.

Key Specifications

Pinout & Package

Package: Press-pack, double-side cooled, stud-mounted diode with isolated anode and cathode terminals. Requires mechanical clamping force of 6–15 kN for low-resistance thermal and electrical contact. Weight: 110 g. Creepage distance: 10 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-power rectifier applications.

Compared with D1230N18TXPSA1, both alternatives offer identical VRRM but trade off 30 A average current and 0.003–0.006 °C/W higher thermal resistance-directly increasing heatsink volume by 8–12% for equivalent Tvj control in continuous-duty applications.

Availability

D1230N18TXPSA1 is available at Aetrix Electronics and suitable for rail traction inverters, industrial medium-voltage drives, grid-scale STATCOMs, and high-power welding rectifiers requiring stable component supply across multi-year production cycles.

Supply support for D1230N18TXPSA1 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 is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensors for automotive, industrial, and renewable energy markets.

This part belongs to Infineon's "Press-Pack Diodes" product line, engineered for ultra-high-current, high-voltage industrial rectification where reliability under mechanical stress and thermal cycling is mission-critical.

FAQ

What is the required clamping force for D1230N18TXPSA1 installation?

The datasheet specifies a clamping force range of 6–15 kN for reliable electrical and thermal contact. Below 6 kN, contact resistance rises sharply, increasing vF and local heating; above 15 kN risks ceramic insulator fracture or silicon pellet deformation. Force must be applied uniformly across both anode and cathode studs using calibrated torque tools and hardened steel washers.

Can D1230N18TXPSA1 be used with single-sided cooling?

Yes, but with significant derating: RthJC increases to 0.062 °C/W (anode-cooled) or 0.093 °C/W (cathode-cooled), reducing IFAVM to 800–900 A at TC = 100 °C. Thermal simulation must confirm Tvj stays below 180 °C under worst-case load and ambient; forced-air cooling is insufficient-liquid or high-mass heatsinks are mandatory.

How does reverse recovery charge (Qr) vary with di/dt?

Qr decreases exponentially as di/dt increases: from ~10,000 µAs at 0.1 A/µs to ~100 µAs at 100 A/µs (measured at iFM = 1600 A, Tvj = 180 °C). This nonlinear relationship directly impacts snubber capacitor sizing-higher di/dt allows smaller C, but demands faster-switching snubber diodes to avoid voltage overshoot.

Is D1230N18TXPSA1 suitable for use in AEC-Q101 qualified automotive applications?

No-this device is not AEC-Q101 qualified. While its datasheet references "AEC / 2010-01-20", that denotes internal Infineon test methodology alignment, not formal qualification. It lacks automotive-specific stress testing (e.g., HTOL, ESD, mechanical shock) and is intended for industrial, traction, and grid infrastructure-not automotive powertrain or ADAS systems.