TD 140 N 18 KOF 5DN Thyristor Diode Power Module: A Technical Overview
TD 140 N 18 KOF 5DN Thyristor Diode Power Module
Introduction and Core Highlights
The TD 140 N 18 KOF 5DN is an Infineon-manufactured thyristor diode module built for robust phase control applications. Featuring solderless pressure contact technology, it guarantees exceptional thermal cycling capability and mechanical durability. With a repetitive peak voltage rating of 1800V, this module offers a significant safety margin for industrial AC lines, maintaining reliable performance under heavy transient conditions.
- Core Specifications: 1800V Blocking Voltage | 140A Average On-State Current ($I_{TAVM}$ at $T_C = 85^circtext{C}$) | 5100A Surge Current Rating ($I_{TSM}$).
- Engineering Value: Solder-free construction eliminates thermal fatigue, while the compact 20mm package width optimizes heatsink mounting space.
- Transient Survival: The high $I^2t$ rating of $130,000 text{ A}^2text{s}$ at $10text{ ms}$ answers the engineering need for reliable circuit protection during fault conditions.
Download Official Datasheet (PDF)
Technical Analysis of the TD 140 N 18 KOF 5DN
The 1800V blocking voltage of the TD 140 N 18 KOF 5DN provides the necessary insulation headroom to operate on nominal 400V and 480V AC power lines. This buffer shields the internal silicon from transient overvoltages common in industrial grids. When compared to standard 1600V modules such as the TD162N16KOF, the 1800V rating mitigates the need for aggressive external snubber protection, simplifying circuit layout.
Managing heat dissipation is critical, and the module achieves a low junction-to-case thermal resistance ($R_{thjc}$) of 0.194 K/W per thyristor. You can imagine thermal resistance as the narrowness of a physical funnel; a lower resistance acts like a wider opening, permitting heat to escape quickly to prevent thermal accumulation. This keeps the junction temperature ($T_{vj}$) within the safe $125^circtext{C}$ limit under maximum load.
Solderless pressure contact technology physically compresses the internal layers rather than bonding them with solder. Solder joints degrade over time due to mismatched expansion coefficients, but pressure contacts maintain constant force. This makes the TD 140 N 18 KOF 5DN highly resistant to thermal fatigue, similar to the performance standards of modules like the SKKD 162/18.
Optimized Application Scenarios
- Soft Starters: The $5100text{A}$ surge current capability supports the initial high-torque starting currents of heavy three-phase AC motors without degradation.
- Industrial Rectifiers: Operates efficiently in input rectification stages where high input voltages require sustained 1800V blocking.
- AC Temperature Controllers: Handles phase-fired control loads with a maximum gate trigger current ($I_{GT}$) of 150mA, ensuring precise turn-on timing.
- Power Supplies: Provides isolated rectifying capabilities, minimizing system noise through stable gating characteristics.
The TD 140 N 18 KOF 5DN is best matched for high-reliability industrial phase control systems demanding 1800V blocking voltage and pressure-contact durability.
Key Specifications Table
| Absolute Maximum Ratings | |
|---|---|
| Repetitive Peak Off-State and Reverse Voltages ($V_{DRM}/V_{RRM}$) | 1800 V |
| Maximum Average On-State Current ($I_{TAVM}$) | 140 A (at $T_C = 85^circtext{C}$) |
| RMS On-State Current ($I_{TRMSM}$) | 250 A |
| Surge On-State Current ($I_{TSM}$) | 5100 A (at $T_{vj} = 125^circtext{C}$, $10text{ ms}$) |
| $I^2t$ Value (Rating for Fusing) | $130,000text{ A}^2text{s}$ (at $T_{vj} = 125^circtext{C}$, $10text{ ms}$) |
| Electrical Characteristics | |
| Gate Trigger Current ($I_{GT}$) | $le 150text{ mA}$ (at $T_{vj} = 25^circtext{C}$) |
| Gate Trigger Voltage ($V_{GT}$) | $le 2.0text{ V}$ (at $T_{vj} = 25^circtext{C}$) |
| Critical Rate of Rise of Off-State Voltage ($dv/dt$) | $1000text{ V/µs}$ |
| Thermal and Isolation Characteristics | |
| Thermal Resistance, Junction to Case ($R_{thjc}$) | $le 0.194text{ K/W}$ (per thyristor) |
| Operating Junction Temperature ($T_{vj}$) | $-40^circtext{C}$ to $+125^circtext{C}$ |
| Isolation Test Voltage ($V_{ISOL}$) | $3000text{ V AC}$ ($1text{ minute}$) |
Engineers FAQ
Q1: How does the surge current capability of this module compare with larger models?
A: The TD 140 N 18 KOF 5DN provides a 5100A surge current rating. For mega-scale applications requiring higher tolerances, modules like the TD500N12KOF 5DN offer higher current options.
Q2: What is the advantage of the isolated copper baseplate?
A: The copper baseplate features direct isolation rated at 3000V AC. This allows multiple modules to be mounted onto a single common heatsink without additional external insulation plates, optimizing thermal paths.
Q3: Does the pressure contact technology affect mounting torque requirements?
A: Yes, securing the module requires uniform pressure. Terminal connection torque and mounting torque must be kept strictly within the specified limits to ensure constant internal electrical contact and thermal dissipation.
Closing Summary
The TD 140 N 18 KOF 5DN thyristor diode power module provides solid protection against voltage fluctuations and mechanical stress. The combination of an 1800V rating and pressure contact construction delivers reliability in phase control applications. Using this module allows system designers to configure high-voltage industrial systems with fewer active protection devices.