Diodes Incorporated B240AE-13

Overview

B240AE-13 from Diodes Incorporated is a 40 V, 2 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.50 V max forward voltage at 2 A and 0.2 mA max reverse leakage at 40 V/25°C, optimized for boost, blocking, and recirculating diode roles in DC-DC converters and power supplies.

For engineers reviewing the B240AE-13 datasheet, B240AE-13 pinout, B240AE-13 application, or B240AE-13 equivalent, key selection criteria include low VF for efficiency, high-temperature IR stability, RoHS-compliant matte tin terminals, and SMA package thermal resistance (RθJA = 95°C/W) for compact power designs.

Technical Context

This Schottky rectifier uses a planar metal-semiconductor junction to achieve low forward conduction loss and fast switching with no minority-carrier storage delay. Its 40 V peak repetitive reverse voltage rating supports 24 V and 36 V input rails in isolated/non-isolated topologies.

Thermal performance is defined by RθJA = 95°C/W on FR-4 (0.4" × 0.5", 2 oz Cu), enabling 2 A continuous operation up to +85°C ambient when properly mounted. Reverse leakage remains stable up to +125°C, mitigating thermal runaway risk in high-density layouts.

Key Specifications

Pinout & Package

SMA package: 2-terminal surface-mount device with anode and cathode leads formed in gull-wing configuration; cathode identified by molded band; body dimensions 2.29–2.92 mm (L) × 4.00–4.60 mm (W) × 1.27–1.63 mm (H); weight ≈ 0.063 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB240-E3/54 and SS24, B240AE-13 delivers superior thermal performance (95°C/W vs. ≥100°C/W) and tighter leakage control (0.2 mA vs. ≥0.5 mA), making it preferred for thermally constrained or battery-backed industrial power stages.

Availability

B240AE-13 is available at Aetrix Electronics and suitable for DC-DC converters, battery management systems, and industrial power supplies requiring stable component supply, RoHS compliance, and high-temperature reliability.

Supply support for B240AE-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power solutions, signal integrity products, and protection devices for industrial, computing, and consumer markets.

B240AE-13 belongs to the B220AE–B245AE Schottky rectifier product line, engineered for general-purpose rectification in space-constrained, thermally demanding power conversion applications.

FAQ

What is the maximum junction temperature for B240AE-13?

The B240AE-13 has an operating junction temperature range of –55°C to +150°C. At 2 A DC current and +25°C ambient, junction temperature rise is approximately 190°C (2 A² × RθJA × 95°C/W), so derating per Figure 4 is required-maximum ambient is +85°C for full 2 A operation on standard FR-4.

Is B240AE-13 suitable for automotive applications?

B240AE-13 is not AEC-Q101 qualified and is not recommended for automotive use. Diodes Incorporated offers the B240AHE-13 variant (same electrical specs, AEC-Q101 Grade 1 qualified) for automotive applications requiring PPAP documentation and IATF 16949 manufacturing.

How does the SMA package compare to SMB for B240AE-13?

B240AE-13 uses the smaller SMA package (2.29–2.92 mm L), while the SMB variant B240BE-13 measures 2.00–2.50 mm L but has lower RθJA (90°C/W). SMA offers higher board density; SMB provides marginally better thermal performance but occupies more PCB area.

What is the typical junction capacitance of B240AE-13?

Typical junction capacitance CT is 93 pF at VR = 4.0 V and f = 1 MHz, as measured per the datasheet. This value affects high-frequency switching behavior-lower CT reduces capacitive coupling noise in fast-switching SMPS designs.