STMicroelectronics STTH1002CBY-TR

Overview

STTH1002CBY-TR from STMicroelectronics is an AEC-Q101-qualified dual center-tap ultrafast rectifier diode in DPAK package, rated for 200 V repetitive peak reverse voltage, 8 A average forward current per diode at Tc = 135 °C, and 20 ns typical reverse recovery time. It delivers low conduction loss (VF = 0.78 V typ. at 150 °C/5 A) and high junction temperature capability (Tj(max) = 175 °C), targeting automotive SMPS and high-frequency DC-DC converters.

For engineers reviewing the STTH1002CBY-TR datasheet, STTH1002CBY-TR pinout, STTH1002CBY-TR application, or STTH1002CBY-TR equivalent, key selection criteria include dual-diode thermal coupling behavior, junction-to-case thermal resistance (4.0 °C/W per diode), low leakage (<40 µA at 125 °C), and AEC-Q101 qualification for under-hood power conversion.

Technical Context

This dual-center-tap configuration integrates two independent ultrafast switching diodes sharing a common cathode terminal (K), enabling synchronous rectification or complementary freewheeling paths in half-bridge or full-wave topologies. Its design emphasizes minimized trr and IRM to reduce switching losses in 100–500 kHz automotive DC-DC stages.

The device operates with a maximum junction temperature of 175 °C and supports pulsed surge currents up to 50 A (tp = 10 ms). Thermal coupling between diodes is characterized by Rth(j-c) = 1.0 °C/W, allowing accurate junction temperature estimation when both diodes conduct simultaneously.

Key Specifications

Pinout & Package

DPAK (TO-252) thermally enhanced surface-mount package with exposed cathode tab for direct PCB heat sinking. Pin assignment verified per STMicroelectronics Doc ID 17536 Rev 2, Figure 12 and Table 6.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1002CBY-TR, the STTH1002CGY-TR offers superior thermal performance in higher-power designs, while the VS-10ETH02-M3/45 provides cost-effective alternative where automotive qualification is unnecessary-neither matches the combined AEC-Q101 compliance, 20 ns trr, and DPAK integration of the original.

Availability

STTH1002CBY-TR is available at Aetrix Electronics and suitable for automotive DC-DC converters, engine control unit (ECU) power stages, and electric power steering (EPS) motor drivers requiring stable component supply and AEC-Q101 assurance.

Supply support for STTH1002CBY-TR 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STTH1002C-Y series belongs to ST's high-efficiency ultrafast diode product line, engineered specifically for automotive-grade switch-mode power supplies demanding low loss, high reliability, and extended temperature operation.

FAQ

What is the maximum continuous forward current per diode at 150 °C case temperature?

At Tc = 150 °C, the STTH1002CBY-TR supports 5 A average forward current per diode (IF(AV) = 5 A), as specified in Table 2. This rating assumes δ = 0.5 duty cycle and accounts for thermal derating above 135 °C. The device achieves 8 A per diode only at Tc = 135 °C.

Is the common cathode (K) pin electrically isolated from the package tab?

No. The K terminal is directly bonded to the exposed metal tab in the DPAK package, forming a low-thermal-resistance path to the PCB copper. This tab must be connected to system ground or low-impedance return plane for optimal thermal and electrical performance.

How does the dual-diode thermal coupling affect junction temperature calculation?

When both diodes conduct simultaneously, junction temperature rise is calculated as ΔTj(diode1) = P(diode1) × Rth(j-c) + P(diode2) × Rth(j-c coupling), where Rth(j-c coupling) = 1.0 °C/W. This coupling term reflects heat transfer between adjacent die and must be included to avoid underestimating peak Tj.

Can STTH1002CBY-TR replace single-diode ultrafast rectifiers in existing layouts?

Yes, but only if the circuit topology accommodates its dual-anode, single-cathode configuration. It cannot substitute for discrete single-diode packages without modifying PCB traces and gate drive logic. Layout reuse is feasible in center-tap transformer or complementary freewheeling applications where the pinout matches.