Diodes Incorporated B180Q-13-F

Overview

B180Q-13-F from Diodes Incorporated is a 1.0A, 80V peak repetitive reverse voltage (V_RRM) Schottky barrier rectifier in SMA package, featuring 0.79V max forward voltage at 1.0A and 0.5mA max reverse leakage at rated voltage, optimized for polarity protection and DC-DC converter freewheeling paths in automotive power supplies.

For engineers reviewing the B180Q-13-F datasheet, B180Q-13-F pinout, B180Q-13-F application, or B180Q-13-F equivalent, this device's AEC-Q101 qualification, 25°C/W junction-to-terminal thermal resistance, and 30A non-repetitive surge rating are critical for high-reliability 12V/24V automotive subsystems requiring low-loss unidirectional conduction.

Technical Context

This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche breakdown and supports automated surface-mount assembly with lead-free matte tin plating rated for 260°C/10s soldering. Its low forward voltage drop and 80pF total capacitance at 4V reverse bias enable efficient high-frequency switching in flyback and buck converters.

The device operates across –65°C to +150°C, with reverse leakage rising to 5.0mA at +100°C and rated V_RRM derated linearly above +125°C terminal temperature per the forward current derating curve. Thermal resistance is specified under terminal-isothermal conditions.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), molded plastic case with UL 94V-0 rating, cathode band marking, 0.064g mass, and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB180-E3/52 and SS18HE3_A/H, B180Q-13-F delivers balanced performance: identical surge rating and thermal resistance, lower max VF than SB180, and broader leakage tolerance than SS18HE3_A/H-making it optimal for cost-constrained automotive power rails where 0.5mA leakage is acceptable.

Availability

B180Q-13-F is available at Aetrix Electronics and suitable for automotive polarity protection, DC-DC freewheeling, and AC-DC rectification requiring stable component supply with AEC-Q101 traceability and IATF 16949 manufacturing assurance.

Supply support for B180Q-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, specializing in high-reliability power management and signal integrity solutions for automotive, industrial, and consumer markets.

The B180Q-13-F belongs to the B170Q–B1100Q Schottky rectifier family, engineered specifically for automotive-grade power conversion with emphasis on low forward voltage, transient robustness, and RoHS-compliant manufacturability.

FAQ

What is the maximum operating temperature for B180Q-13-F?

The B180Q-13-F has an operating junction temperature range of –65°C to +150°C. Its average forward current rating drops to 1.0A only when the terminal temperature is held at +125°C; derating is required above that point per the published forward current derating curve. The device remains functional up to +150°C but with reduced current capacity.

Is B180Q-13-F suitable for use in space-constrained PCB designs?

Yes. Its SMA (DO-214AC) package measures 4.60mm × 2.92mm × 1.63mm and weighs only 0.064g, making it ideal for dense automotive PCBs. The low-profile design supports tight keep-out zones, and its 25°C/W thermal resistance allows effective heat dissipation through minimal copper area without heatsinks.

Does B180Q-13-F require a heatsink in 1A continuous operation?

No heatsink is required if the terminal temperature is maintained at or below +125°C. With R_θJT = 25°C/W and 1.0A conduction at 0.79V drop (0.79W dissipation), a 20°C temperature rise above ambient is expected-achievable using ≥100mm² of 1oz copper connected directly to the terminals. Larger copper pours further reduce thermal resistance.

How does the guard ring construction improve reliability?

The guard ring die structure surrounds the active junction to distribute electric field stress and prevent premature edge breakdown during voltage transients. This design allows the B180Q-13-F to withstand automotive load dump pulses and ISO 7637-2 transients without avalanche failure, eliminating the need for external TVS clamps in many polarity protection circuits.