NXP Semiconductors IRF640,127

Overview

IRF640,127 from NXP Semiconductors (formerly Philips) is an N-channel enhancement-mode TrenchMOS power transistor in TO-220AB (SOT78) package, rated for 200 V V_DSS, 16 A continuous drain current at 25 °C, and R_DS(ON) ≤ 180 mΩ at V_GS = 10 V. It serves as a high-efficiency switching element in offline SMPS, CRT monitor power supplies, and DC-DC converters.

For engineers reviewing the IRF640,127 datasheet, IRF640,127 pinout, IRF640,127 application, or IRF640,127 equivalent, key selection criteria include avalanche energy rating (580 mJ), thermal resistance junction-to-mounting-base (1.1 K/W), gate charge (63 nC), and body diode reverse recovery characteristics (t_rr = 130 ns, Q_rr = 0.8 µC).

Technical Context

The IRF640,127 employs trench-gate MOSFET architecture to achieve low on-resistance and fast switching with minimal Miller charge (Q_gd = 35 nC). Its safe operating area supports unclamped inductive switching up to 64 A pulsed drain current and 580 mJ non-repetitive avalanche energy under defined conditions (IAS = 6.2 A, t_p = 720 µs).

Thermal design is enabled by direct metal tab mounting-drain-connected tab provides low R_{th j-mb} = 1.1 K/W-and internal parasitic inductances are characterized (L_d = 3.5–4.5 nH, L_s = 7.5 nH), supporting accurate layout modeling for high-frequency hard-switching topologies.

Key Specifications

Pinout & Package

IRF640,127 is housed in the SOT78 (TO-220AB) package with a drain-connected metal tab for thermal and electrical connection. Pin 2 is internally connected to the mounting base and must be electrically isolated from other circuit nodes unless used as the primary drain return path.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Compared with STP20NM60FD and IRFP460, the IRF640,127 offers optimal balance of 200 V rating, low R_DS(ON), and proven avalanche ruggedness for cost-sensitive 110/220 VAC offline power stages-making it preferred for flyback and forward converters where voltage margin and thermal efficiency are tightly constrained.

Availability

IRF640,127 is available at Aetrix Electronics and suitable for switched-mode power supplies, DC-DC converters, motor control circuits, and general-purpose switching applications requiring stable component supply and long-term industrial availability.

Supply support for IRF640,127 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

NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips' semiconductor division, specializing in high-reliability analog, power, and interface solutions for industrial and automotive markets.

The IRF640,127 belongs to NXP's legacy TrenchMOS power transistor family, designed specifically for high-efficiency, high-ruggedness switching in offline AC-DC and isolated DC-DC power conversion systems.

FAQ

What is the maximum continuous drain current rating for IRF640,127 at 100 °C mounting base temperature?

The IRF640,127 supports 11 A continuous drain current (I_D) at T_mb = 100 °C with V_GS = 10 V, per its limiting values table. This derating reflects thermal constraints of the TO-220AB package and must be verified against actual heatsink performance and ambient conditions in the final design. The IRF640,127 datasheet specifies this value explicitly under "LIMITING VALUES".

Does IRF640,127 have a built-in body diode, and what are its key parameters?

Yes, the IRF640,127 integrates a source-drain body diode with typical forward voltage V_SD = 1.0 V at I_F = 18 A and V_GS = 0 V, reverse recovery time t_rr = 130 ns, and reverse recovery charge Q_rr = 0.8 µC. These parameters are measured under standardized conditions (IF = 18 A, –dIF/dt = 100 A/µs, VR = 25 V) and are critical for freewheeling behavior in hard-switched topologies. The IRF640,127 body diode is intrinsic to its vertical MOSFET structure.

What is the gate threshold voltage range for IRF640,127, and how does it vary with temperature?

The IRF640,127 has a gate threshold voltage V_GS(TO) of 2–4 V at T_j = 25 °C, decreasing to 1 V at T_j = 175 °C and increasing to 6 V at T_j = –55 °C. This wide operational range ensures reliable turn-on with 5 V logic-level drivers across industrial temperature extremes. The IRF640,127 datasheet confirms these values in the "ELECTRICAL CHARACTERISTICS" section.

Can IRF640,127 be used in avalanche mode, and what are the safe operating limits?

Yes, the IRF640,127 is rated for non-repetitive avalanche operation with E_AS = 580 mJ and I_AS = 16 A under specified conditions (unclamped inductive load, I_AS = 6.2 A, t_p = 720 µs, T_j = 25 °C). Operation beyond these limits risks permanent damage. The IRF640,127 avalanche data is validated per IEC 134 and documented in the "AVALANCHE ENERGY LIMITING VALUES" table.

What is the thermal resistance from junction to mounting base for IRF640,127, and how is it measured?

The IRF640,127 has a maximum thermal resistance R_{th j-mb} of 1.1 K/W from junction to mounting base, measured with the device mounted to a large copper heatsink using recommended torque and thermal interface material. This value enables accurate junction temperature estimation (T_j = T_mb + P_D × R_{th j-mb}) and is specified in the "THERMAL RESISTANCES" section of the IRF640,127 datasheet.