STMicroelectronics STTH2R02AFY

Overview

STTH2R02AFY from STMicroelectronics is an AEC-Q101-qualified automotive ultrafast rectifier diode in SOD128Flat package, rated for 200 V repetitive peak reverse voltage (VRRM), 2 A average forward current (IF(AV)), and 15 ns typical reverse recovery time (trr) at 25 °C. It delivers low conduction losses (VF typ. 0.72 V at 150 °C, 2 A) and operates up to 175 °C junction temperature, targeting base-drive and free-wheeling roles in automotive power switching circuits.

For engineers reviewing the STTH2R02AFY datasheet, STTH2R02AFY pinout, STTH2R02AFY application, or STTH2R02AFY equivalent, key selection criteria include ultrafast recovery (trr ≤ 22 ns at 125 °C), high thermal robustness (Tj max = 175 °C), AEC-Q101 qualification, and SOD128Flat surface-mount compatibility with PPAP-capable supply chain support.

Technical Context

This planar silicon rectifier uses ST's 200 V ultrafast technology optimized for minimal reverse recovery charge (QRR = 40 nC at 125 °C) and negligible switching losses in hard-switched topologies. Its low VF (0.72 V typ. @ 150 °C, 2 A) and tight trr distribution (15–22 ns across temperature and dIF/dt conditions) enable efficient operation in high-frequency automotive DC/DC converters and motor drive snubbers.

The device features a thermally enhanced SOD128Flat package with Rth(j-l) = 16–24 °C/W, supporting direct lead-to-PCB heat transfer without heatsink in moderate-power applications. Reverse leakage remains under 8 µA at 125 °C and full VRRM, ensuring stable blocking performance in harsh ambient environments.

Key Specifications

Pinout & Package

SOD128Flat is a flat-lead, surface-mount plastic package with epoxy meeting UL94 V0 and lead-free construction. It features two terminals: anode and cathode, mounted on a single-row gull-wing footprint optimized for automated assembly and thermal dissipation via exposed leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR220SFT1G and VS-2EY20-M3/54, STTH2R02AFY uniquely combines AEC-Q101 qualification, 15 ns trr, 0.72 V VF at 150 °C, and SOD128Flat thermal performance-making it the only choice for space-constrained, high-reliability automotive power stages requiring both speed and ruggedness.

Availability

STTH2R02AFY is available at Aetrix Electronics and suitable for automotive engine control units, electric power steering systems, and body control modules requiring stable component supply with full PPAP documentation and traceable lot-level compliance.

Supply support for STTH2R02AFY 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, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

The STTH series targets automotive-grade ultrafast rectification, with STTH2R02AFY specifically engineered for high-temperature, high-dI/dt power switching in safety-critical vehicle subsystems.

FAQ

Is STTH2R02AFY pin-compatible with standard SOD-123 or SMA diodes?

No. STTH2R02AFY uses the SOD128Flat package, which has wider lead spacing (E = 4.6–4.8 mm) and longer leads (L = 0.55–0.85 mm) than SOD-123 (E ≈ 2.6 mm) or SMA (E ≈ 4.2 mm). PCB footprints and reflow profiles must be validated per Figure 12 in DocID027544 Rev 1.

What is the maximum allowable dIF/dt this diode can handle without oscillation?

Test data shows stable operation up to 200 A/µs at 125 °C and VR = 160 V (Table 5). At that rate, trr remains 22 ns and QRR stays at 40 nC. Exceeding 200 A/µs may induce ringing due to parasitic inductance; layout must minimize loop area and use local decoupling.

Does STTH2R02AFY require a heatsink in a 2 A, 12 V automotive buck converter?

Not typically. With Rth(j-l) = 16–24 °C/W and VF ≈ 0.75 V at 2 A, power dissipation is ~1.5 W. A 25 mm² 2-oz copper pour per lead reduces effective Rth(j-a) to ~50 °C/W, limiting ΔTj to ~75 °C above ambient-well within the 175 °C limit at 105 °C ambient.

How does ECOPACK®2 compliance impact assembly process?

ECOPACK®2 confirms lead-free (Pb-free) terminations and halogen-free epoxy, compatible with standard lead-free reflow profiles (peak 260 °C, 10 s). No special flux or nitrogen atmosphere is required, but moisture sensitivity level (MSL) is 1-no baking needed prior to assembly.