Renesas RJK0346DPA-WS#J0

Overview

RJK0346DPA-WS#J0 from Renesas is a silicon N-channel power MOSFET designed for high-efficiency DC-DC conversion and synchronous rectification in server VRMs, POL converters, and battery-powered systems. It delivers R_DS(on) = 1.5 mΩ (V_GS = 10 V), supports 4.5 V gate drive, handles 65 A continuous drain current, and features WPAK package with integrated source–drain thermal path.

For engineers reviewing the RJK0346DPA-WS#J0 datasheet, RJK0346DPA-WS#J0 pinout, RJK0346DPA-WS#J0 application, or RJK0346DPA-WS#J0 equivalent, this page provides verified electrical parameters, thermal derating behavior, switching timing data, and validated alternatives for high-current, low-voltage power switching designs.

Technical Context

This MOSFET uses trench-gate super-junction architecture to achieve ultra-low on-resistance while maintaining fast switching (t_d(on) = 15 ns, t_f = 20 ns) and low gate charge (Q_g = 49 nC). Its body diode exhibits t_rr = 45 ns and V_DF = 0.80 V at 65 A, enabling efficient synchronous rectification without external Schottky replacement.

The device operates within a 30 V V_DSS rating and is characterized for stable performance across –25°C to 150°C channel temperature. Thermal resistance θ_ch–C = 1.92°C/W enables high-power density mounting on PCBs with copper-clad thermal pads, and avalanche-rated (I_AP = 35 A, E_AR = 122.5 mJ) for robustness under transient overloads.

Key Specifications

Pinout & Package

Package: WPAK (RENESAS code PWSN0008DA-A), surface-mount, thermally enhanced leadframe with exposed drain pad. Dimensions: 5.9 mm × 4.21 mm × 1.27 mm (L×W×H), mass 0.075 g, Ni/Pd/Au plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRL3803PbF and SiR626DP, the RJK0346DPA-WS#J0 offers superior thermal performance via WPAK's low θ_ch–C, guaranteed avalanche ruggedness, and tighter gate threshold (V_GS(off) = 1.2–2.5 V) for improved noise immunity in high-noise power stages.

Availability

RJK0346DPA-WS#J0 is available at Aetrix Electronics and suitable for server VRMs, point-of-load converters, and battery-powered motor drives requiring stable component supply, long-term lifecycle support, and traceable Pb-free sourcing.

Supply support for RJK0346DPA-WS#J0 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and infrastructure markets.

The RJK0346DPA-WS#J0 belongs to Renesas' WPAK-series high-current power MOSFET product line, engineered specifically for high-efficiency, high-density DC-DC conversion in datacenter and enterprise computing power systems.

FAQ

What is the maximum continuous drain current rating for RJK0346DPA-WS#J0?

The RJK0346DPA-WS#J0 is rated for 65 A continuous drain current (I_D) at case temperature T_c = 25°C. This rating de-rates linearly with increasing case temperature per the published power vs. temperature curve, reaching approximately 40 A at T_c = 100°C. The device also supports 260 A pulsed drain current (I_D(pulse)) for PW ≤ 10 µs and duty cycle ≤ 1%, enabling robust short-circuit handling in protection-critical applications.

Does RJK0346DPA-WS#J0 support 4.5 V gate drive in production designs?

Yes, the RJK0346DPA-WS#J0 is explicitly characterized for logic-level operation: its R_DS(on) is specified as 1.9 mΩ typ. at V_GS = 4.5 V and I_D = 32.5 A. The gate threshold voltage V_GS(off) ranges from 1.2 V to 2.5 V, ensuring reliable turn-on with standard 3.3 V or 5 V gate drivers without requiring level-shifting circuitry. This makes the RJK0346DPA-WS#J0 suitable for direct interface with PWM controllers such as the ISL63xx and IR35xx families.

What thermal resistance value applies to RJK0346DPA-WS#J0 in real-world PCB layouts?

The RJK0346DPA-WS#J0 specifies channel-to-case thermal resistance θ_ch–C = 1.92°C/W, measured under standardized test conditions with direct thermal contact to a cold plate. In actual PCB designs, effective thermal resistance depends on copper area, thickness, and via count beneath the exposed drain pad. With ≥2 oz copper, 8–12 thermal vias, and a 100 mm² thermal pad, typical θ_JA achieves 40–45°C/W - significantly better than TO-220 or DPAK alternatives - enabling >50 W dissipation without external heatsinks.

Is RJK0346DPA-WS#J0 avalanche-rated, and what does that mean for circuit design?

Yes, the RJK0346DPA-WS#J0 is fully avalanche-rated: it guarantees repetitive avalanche current I_AP = 35 A and energy E_AR = 122.5 mJ at T_ch = 25°C with R_g ≥ 50 Ω. This rating allows the RJK0346DPA-WS#J0 to safely absorb inductive energy during switching transients - such as those caused by transformer leakage or motor winding interruption - without requiring external clamping components like TVS diodes or RCD snubbers in many medium-power applications.

How does the WPAK package of RJK0346DPA-WS#J0 differ from standard SO-8 or D2PAK in terms of mounting and reliability?

The WPAK package used by RJK0346DPA-WS#J0 features an exposed drain pad with coplanar source and gate terminals, enabling simultaneous high-current conduction and low-thermal-resistance heat transfer to the PCB. Unlike SO-8 (limited to ~20 A) or D2PAK (bulky, high θ_JA), WPAK achieves 65 A current capacity in a 5.9 mm × 4.21 mm footprint with solder joint reliability validated per JESD22-A113. Its leadframe design also eliminates wirebond fatigue failure modes common in traditional packages, enhancing long-term reliability in thermally cycled environments.