STMicroelectronics STTH4R02RL

Overview

STTH4R02RL from STMicroelectronics is an ultrafast recovery silicon rectifier diode optimized for high-frequency switching applications. It features a 200 V repetitive peak reverse voltage (V_RRM), 4 A average forward current (I_F(AV)), 16 ns typical reverse recovery time (t_rr), and operates up to 175 °C junction temperature - enabling use in low-voltage inverters, freewheeling paths, and polarity protection circuits.

For engineers reviewing the STTH4R02RL datasheet, STTH4R02RL pinout, STTH4R02RL application, or STTH4R02RL equivalent, key selection criteria include ultrafast t_rr performance at 125 °C, low conduction loss (V_F = 0.76 V typ. @ 150 °C), DPAK thermal resistance (R_th(j–c) = 3.5 °C/W), and ECOPACK®2 compliance for industrial power conversion designs.

Technical Context

This device employs ST's planar platinum-doped technology to achieve precise carrier lifetime control, delivering stable ultrafast recovery with minimal tail current. Its low t_rr (16–24 ns) and low I_RM (4.4–5.5 A) under dI_F/dt = –200 A/µs ensure reduced switching losses in hard-switched topologies.

The DPAK package provides direct thermal path from junction to case (3.5 °C/W), supporting high-power density layouts in space-constrained SMPS and motor drive PCBs. Static V_F remains tightly bounded (0.76–1.25 V) across 25–150 °C and 4–12 A, enabling predictable conduction loss modeling using P = 0.67 × I_F(AV) + 0.04 × I_F(RMS)².

Key Specifications

Pinout & Package

STTH4R02RL is supplied in the DPAK (TO-252) surface-mount package, featuring a single thermal pad on the underside for enhanced heat transfer. The cathode is marked by a band on the component body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast recovery diode applications.

Compared with STTH4L02D and VS-4EY20-M3, STTH4R02RL delivers optimal balance of ultrafast recovery (16 ns), low conduction loss (0.76 V), and DPAK thermal capability (3.5 °C/W), making it preferred for thermally constrained, high-frequency industrial power stages where both switching and conduction losses must be minimized.

Availability

STTH4R02RL is available at Aetrix Electronics and suitable for DC–DC converter output rectification, motor drive freewheeling, and input polarity protection requiring stable component supply and full production lifecycle support.

Supply support for STTH4R02RL 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs and discrete power devices for industrial, automotive, and consumer markets.

The STTH ultrafast diode product line targets high-efficiency, high-frequency power conversion systems - specifically engineered to replace standard fast and Schottky diodes in SMPS, motor drives, and renewable energy inverters where low t_rr and high T_j are critical.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH4R02RL is rated for I_F(AV) = 4 A at T_c = 160 °C in DPAK package. Exceeding this case temperature requires linear derating per Figure 1 in the datasheet; operation above 160 °C reduces average current capacity to maintain T_j ≤ 175 °C. Thermal design must ensure R_th(c–a) ≤ 3.75 °C/W for full 4 A rating at 85 °C ambient.

Does STTH4R02RL have a built-in thermal shutdown function?

No, STTH4R02RL is a passive silicon rectifier diode with no integrated thermal protection circuitry. Safe operation relies entirely on external thermal management - including PCB copper area, heatsinking, airflow, and current derating - to keep junction temperature below 175 °C under worst-case load and ambient conditions.

Can STTH4R02RL be used in place of a Schottky diode in 24 V output circuits?

Yes, but only where reverse voltage exceeds 30 V. STTH4R02RL's 200 V V_RRM and 0.76 V V_F make it viable for 24 V systems needing higher reverse blocking than typical 45 V Schottkys. However, its 16 ns t_rr introduces minor switching loss absent in zero-recovery Schottkys - acceptable in <500 kHz designs with proper snubbing.

Is the exposed DPAK tab electrically isolated from the cathode?

No, the exposed thermal pad (tab) is internally connected to the cathode terminal. PCB layout must treat the tab as a cathode node - routing it to the same net and avoiding isolation gaps. This connection enables both thermal conduction and electrical functionality, and incorrect isolation will cause short-circuit failure.