Toshiba Semiconductor and Storage CRS15I40A(TE85L,QM

Overview

CRS15I40A 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_RRM = 40 V, I_F(AV) = 1.5 A, V_FM ≤ 0.55 V at 1.5 A, and operates with T_j up to 150 °C in the ultra-thin S-FLAT (3-2A1S) package.

For engineers reviewing the CRS15I40A datasheet, CRS15I40A pinout, CRS15I40A application, or CRS15I40A equivalent, key selection criteria include low forward voltage for efficiency-critical 5–12 V output stages, thermal resistance limits under high-density PCB layouts, and derating guidance for junction temperature control in battery-powered systems.

Technical Context

The CRS15I40A employs a planar Schottky junction structure enabling fast switching (<10 ns recovery) and low conduction loss. Its 40 V V_RRM rating targets 5 V and 12 V secondary-side outputs in buck and flyback topologies, while its 20 A non-repetitive surge capability supports transient load conditions.

Thermal design relies on junction-to-lead resistance of 20 °C/W and junction-to-ambient resistance of 70 °C/W (ceramic board), requiring careful land pattern sizing (2 mm × 2 mm solder pad) to maintain T_j ≤ 120 °C under full average current.

Key Specifications

Pinout & Package

Package: S-FLAT (Toshiba designation 3-2A1S), ultra-thin surface-mount package (0.9 mm max height), 2-pin, lead-free, RoHS-compliant. Dimensions: 2.9 mm × 1.9 mm × 0.9 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB055LAM-40TR and SS14-HF, the CRS15I40A uniquely balances 1.5 A current handling with sub-1 mm profile-enabling higher-power density in space-limited applications where both current and height are critical constraints.

Availability

CRS15I40A is available at Aetrix Electronics and suitable for USB-C power adapters, smartphone PMIC subsystems, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for CRS15I40A 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 designs and manufactures discrete semiconductors, power devices, and logic ICs with emphasis on energy efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.

The CRS15I40A belongs to Toshiba's S-FLAT Schottky diode product line, engineered specifically for high-efficiency, low-profile DC-DC conversion in battery-powered and space-constrained electronics.

FAQ

What is the maximum junction temperature specification for the CRS15I40A?

The CRS15I40A has an absolute maximum junction temperature (T_j) of 150 °C. However, Toshiba recommends limiting steady-state operation to ≤120 °C to ensure long-term reliability, especially under continuous 1.5 A load. Derating curves in the datasheet (Fig. 10.3) define allowable I_F(AV) versus ambient temperature, and thermal design must account for R_th(j–ℓ) = 20 °C/W to the cathode lead.

Does the CRS15I40A support lead-free reflow soldering processes?

Yes, the CRS15I40A is RoHS-compliant and qualified for standard lead-free reflow profiles, including peak temperatures up to 260 °C. Its S-FLAT (3-2A1S) package uses matte tin-plated leads compatible with SAC305 solder. The recommended land pattern (2 mm × 2 mm) ensures reliable wetting and thermal anchoring during reflow.

How does the CRS15I40A's reverse leakage compare to standard silicon diodes at 40 V?

At V_RRM = 40 V and T_a = 25 °C, the CRS15I40A exhibits I_RRM ≤ 60 µA (max), significantly higher than silicon diodes but typical for Schottky devices. This is acceptable in most SMPS secondary rectification roles, though system-level thermal design must prevent thermal runaway-Toshiba advises keeping T_j < 120 °C to limit leakage growth.

Can the CRS15I40A be used in place of a MOSFET-based synchronous rectifier?

The CRS15I40A serves as a passive rectifier and cannot replace a synchronous rectifier MOSFET that requires gate control. It is a drop-in alternative only where simplicity, cost, or layout density outweigh efficiency gains from active rectification. In 1.5 A applications, its 0.55 V V_FM yields ~0.825 W loss-versus ~0.15 W for a typical 20 mΩ MOSFET-so trade-offs must be evaluated per system thermal budget.

What is the marking code printed on the CRS15I40A package?

The CRS15I40A is marked with "SL" on the top surface of the S-FLAT package, per Toshiba's standard marking convention for this device. This two-character code identifies the part within Toshiba's traceability system and matches the marking diagram in Section 7 of the official datasheet (Rev. 1.0.A, 2026-04-07).