Toshiba Semiconductor and Storage CRS20I40A(TE85L,QM

Overview

CRS20I40A from Toshiba is a Schottky barrier diode optimized for secondary rectification and reverse-current protection in compact DC-DC converters and mobile power rails. It delivers V_FM ≤ 0.6 V at 2 A peak forward current, supports 40 V repetitive peak reverse voltage, and operates with junction temperatures up to 150 °C in the S-FLAT (3-2A1S) surface-mount package.

For engineers reviewing the CRS20I40A datasheet, CRS20I40A pinout, CRS20I40A application, or CRS20I40A equivalent, key selection criteria include low forward voltage drop under pulsed 2 A loads, thermal resistance of 70 °C/W (junction-to-ambient on ceramic board), and compatibility with high-density PCB layouts requiring thin-profile discrete rectifiers.

Technical Context

The CRS20I40A employs a planar Schottky junction structure enabling fast switching with negligible reverse recovery charge, making it suitable for high-frequency switching regulator outputs where efficiency and thermal management are critical. Its low V_FM (0.53 V typ. at 2 A) directly reduces conduction loss in 3.3 V–12 V output stages.

Thermal design must account for its sensitivity to thermal runaway: R_th(j-a) varies significantly with PCB land pattern (70 °C/W on ceramic vs. 140 °C/W on glass-epoxy), and derating guidance specifies limiting T_j to ≤120 °C and I_F(AV) to ≤80% of 2 A rating under worst-case ambient conditions.

Key Specifications

Pinout & Package

Package: S-FLAT (Toshiba designation 3-2A1S), ultra-thin surface-mount package with 0.013 g typical weight and footprint optimized for high-density assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB055LAM-40 and SS24-HF, the CRS20I40A uniquely balances 2 A average current, 0.6 V forward voltage, and S-FLAT thin profile-enabling high-efficiency rectification in sub-1 mm height mobile power modules without thermal derating penalties.

Availability

CRS20I40A is available at Aetrix Electronics and suitable for secondary rectification in switching regulators, reverse-current protection in mobile devices, and DC-DC converter output stages requiring stable component supply and long-term production continuity.

Supply support for CRS20I40A 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

Toshiba Electronic Devices & Storage Corporation is a global semiconductor manufacturer specializing in power devices, logic ICs, and memory solutions, with decades of leadership in discrete rectifier technology.

The CRS20I40A belongs to Toshiba's S-FLAT Schottky diode product line, engineered specifically for high-frequency, high-density power conversion in portable electronics where low forward voltage and minimal PCB footprint are mandatory.

FAQ

What is the maximum junction temperature rating for the CRS20I40A?

The absolute maximum junction temperature (T_j) for the CRS20I40A is 150 °C. However, Toshiba's derating guidance recommends operating below 120 °C to ensure long-term reliability and prevent thermal runaway, especially given the device's Schottky characteristics. This limit applies directly to thermal design using the CRS20I40A in continuous-duty applications such as DC-DC output rectification.

Does the CRS20I40A have a specified junction-to-lead thermal resistance?

Yes, the CRS20I40A has a maximum junction-to-lead thermal resistance (R_th(j-ℓ)) of 20 °C/W, measured from junction to cathode lead. This value enables direct thermal coupling to PCB copper pours and is critical for estimating temperature rise when the CRS20I40A is used in high-current mobile power rails without external heatsinking.

What is the peak forward voltage specification for CRS20I40A at 2 A?

The peak forward voltage (V_FM) for the CRS20I40A is guaranteed ≤ 0.60 V at I_FM = 2 A under pulse test conditions. Typical performance is 0.53 V at this current, which directly determines conduction loss in applications like secondary-side rectification where the CRS20I40A replaces less efficient PN diodes.

Is the CRS20I40A suitable for reverse-current protection in USB-powered devices?

Yes, the CRS20I40A is explicitly recommended for reverse-current protection in mobile devices per Toshiba's application notes. Its 2 A average forward current rating, 40 V reverse blocking, and low 0.6 V forward drop make it ideal for preventing backfeed between VBUS and battery rails in smartphones and wearables where the CRS20I40A operates continuously under bidirectional power path switching.

What package type does the CRS20I40A use, and what are its key mechanical attributes?

The CRS20I40A uses the S-FLAT package (Toshiba designation 3-2A1S), an ultra-thin surface-mount outline with a typical weight of 0.013 g. Its dimensions support high-density board assembly, and the package exposes the cathode as terminal 2 for optimal thermal conduction to the PCB, a key attribute distinguishing the CRS20I40A from larger-outline Schottky alternatives.