Surface-mount 3.0 A Schottky barrier rectifier in an SMA (DO-214AC) package. Rated for 40 V reverse voltage with a low 0.50 V max forward drop at 3 A, guard-ring die construction for transient protection, and AEC-Q101 automotive qualification. Suited to DC-DC converters, freewheeling, polarity protection, and high-efficiency low-voltage rectification.

Pinout

Pin	Name	Type	Function
1	K	passive	Cathode terminal of the Schottky rectifier. Marked by the cathode band (and possibly a cathode notch) on the package top per the Mechanical Data section. Rated reverse voltage VRRM = 40V; typical leakage IR(MAX) = 0.5 mA @ VRRM, TA = +25°C.
2	A	passive	Anode terminal of the Schottky rectifier. Opposite end from the cathode band. Rated average rectified forward current IO = 3.0 A @ TT = +100°C; VF(MAX) = 0.50 V @ IF = 3.0 A, TA = +25°C; non-repetitive peak forward surge IFSM = 80 A (8.3 ms, single half sine).

Key specifications

Parameter	Value
Type	Schottky barrier rectifier
Reverse voltage (VRRM)	40 V
Average forward current (IO)	3.0 A @ 100 °C
Forward voltage (VF)	0.50 V max @ 3 A
Reverse current (IR)	0.5 mA max @ VRRM
Surge current (IFSM)	80 A (8.3 ms half-sine)
Qualification	AEC-Q101
Package	SMA (DO-214AC)
Body (L×W×H)	4.3 × 2.6 × 2.4 mm

Ordering variants

B340A-13-F

CAD (KiCad official)

Symbol: Device:D_Schottky
Footprint: Diode_SMD:D_SMA
3D model: SMA / DO-214AC (KiCad packages3D)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Diodes Incorporated datasheet (6 pp, sha256 4eec579d89a9abbe, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF