Diodes Incorporated BAS20Q-13-F

Overview

BAS20Q-13-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount fast switching diode in SOT23 package, rated for 200 V repetitive peak reverse voltage (V_RRM), 400 mA forward continuous current (I_FM), and 50 ns reverse recovery time (t_rr). It serves as a high-conductance general-purpose switching element in automotive power management, signal routing, and clamp protection circuits.

For engineers reviewing the BAS20Q-13-F datasheet, BAS20Q-13-F pinout, BAS20Q-13-F application, or BAS20Q-13-F equivalent, key selection criteria include its automotive qualification status, 200 V blocking capability, low 1.25 V forward voltage at 200 mA, 5.0 pF junction capacitance at 0 V, and compatibility with automated SMT assembly on FR-4 PCBs.

Technical Context

The BAS20Q-13-F is a silicon planar epitaxial fast-switching diode optimized for high-speed turn-off and low forward conduction loss. Its 50 ns reverse recovery time enables use in moderate-frequency switching (≤1 MHz) applications such as DC-DC converter freewheeling, logic-level clamping, and transient suppression.

Designed for automotive-grade reliability, it operates across –55 °C to +150 °C, features halogen- and antimony-free "Green" construction, and is manufactured in IATF 16949 certified facilities with PPAP support. Thermal resistance is 500 °C/W (junction-to-ambient, FR-4, 2 oz copper).

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package (UL 94V-0), 0.008 g weight, moisture sensitivity level 1 per J-STD-020, lead-free matte tin plating over Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast-switching diode applications.

Compared with BAS20-13-F, the BAS20Q-13-F adds automotive qualification without electrical trade-offs; versus 1N4148W-7-F, it provides higher voltage rating and guaranteed t_rr, making it suitable for robust 12 V/24 V automotive subsystems where reliability and specification certainty are mandatory.

Availability

BAS20Q-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, DC-DC converter freewheel paths, and USB port protection circuits requiring stable component supply and full AEC-Q101 compliance.

Supply support for BAS20Q-13-F 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The BASxQ series belongs to Diodes' automotive-qualified fast-switching diode product line, engineered specifically for high-reliability signal routing, clamping, and freewheeling in harsh-environment vehicle electronics.

FAQ

What is the maximum junction temperature and thermal derating behavior of BAS20Q-13-F?

The device operates from –55 °C to +150 °C junction temperature. Power dissipation must be derated linearly above +25 °C ambient: at +100 °C ambient, maximum allowable P_D drops to 125 mW (50% of 250 mW rating), per the published derating curve. Layout with thermal vias under Pin 2 improves heat transfer.

Is BAS20Q-13-F pin-compatible with BAS20-13-F and BAS21Q-13-F?

Yes-BAS20Q-13-F shares identical SOT23 pinout, marking orientation, and mechanical dimensions with BAS20-13-F and BAS21Q-13-F. However, BAS21Q-13-F has higher 250 V V_RRM and slightly higher V_F; substitution requires verification of voltage margin and forward loss impact in the target circuit.

Does BAS20Q-13-F support reflow soldering per JEDEC J-STD-020?

Yes-it is rated for moisture sensitivity level 1 (MSL-1), meaning it can be stored indefinitely at ≤30 °C/85% RH and withstand standard Pb-free reflow profiles (peak 260 °C, 20–40 sec) without baking. The matte tin finish ensures reliable solder wetting on OSP- or ENIG-finished PCBs.

How does the 50 ns reverse recovery time affect circuit performance in a 500 kHz switching application?

At 500 kHz (2 µs period), 50 ns t_rr consumes just 2.5% of the switching cycle, minimizing dead-time losses and preventing shoot-through in half-bridge configurations. Measured under IF = IR = 30 mA, this value ensures predictable timing in synchronous rectifier gate-drive snubbers and active clamp circuits.