Diodes Incorporated SMBJ180A-13-F

Overview

SMBJ180A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 180V reverse standoff voltage, 200V minimum breakdown voltage at 1.0mA test current, and 291.6V maximum clamping voltage at 2.06A peak pulse current. It features glass-passivated die construction, SMB package, and is used for overvoltage protection in industrial power supplies and DC bus lines.

For engineers reviewing the SMBJ180A-13-F datasheet, SMBJ180A-13-F pinout, SMBJ180A-13-F application, or SMBJ180A-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse current capability under 8.3ms half-sine surge, thermal derating above +25°C, and RoHS-compliant lead-free plating for automated assembly.

Technical Context

This TVS diode operates as a unidirectional clamping device, activated only when reverse voltage exceeds VRWM (180V), with sharp avalanche breakdown at VBR ≥200V. Its glass-passivated junction ensures stable leakage performance and robust ESD immunity.

The SMB package enables high-power dissipation (600W non-repetitive) in compact footprint while maintaining thermal resistance suitable for PCB-level surge suppression on 48V–200V DC rails. Clamping behavior is characterized using standardized 10/1000μs waveform per REA.

Key Specifications

Pinout & Package

Two-terminal SMB package: anode and cathode. Cathode identified by band marking on top surface. No internal pin numbering; terminals are electrically symmetric except for polarity-dependent clamping function.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Compared with SMBJ180A-13-F, Littelfuse's SMBJ180A offers identical protection performance and drop-in compatibility, while Vishay's P6SMB180A trades 8.4V higher clamping for broader vendor qualification-making Diodes' version optimal for designs requiring tight voltage margin control.

Availability

SMBJ180A-13-F is available at Aetrix Electronics and suitable for industrial motor drives, telecom power rectifiers, and renewable energy inverters requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SMBJ180A-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 SMBJ series belongs to Diodes' transient voltage suppression product line, engineered specifically for high-energy surge protection in industrial, telecom, and transportation systems where reliability under repetitive surge stress is critical.

FAQ

What is the maximum clamping voltage of SMBJ180A-13-F and under what test condition?

The maximum clamping voltage is 291.6V, measured at a peak pulse current (I_PP) of 2.06A using a 10/1000μs double-exponential waveform per REA standards. This value represents the worst-case voltage imposed on the protected circuit during a defined surge event and is guaranteed across the full operating temperature range.

Is SMBJ180A-13-F unidirectional or bidirectional, and how is polarity identified?

SMBJ180A-13-F is a unidirectional TVS diode, indicated by the absence of "C" in the part number. Polarity is marked by a cathode band on the top surface of the SMB package; the banded end connects to the protected line, while the opposite terminal connects to ground or reference potential.

Can SMBJ180A-13-F be used in parallel for higher surge current handling?

No-parallel operation is not recommended due to mismatch in dynamic impedance and avalanche turn-on characteristics, which causes current imbalance and potential thermal runaway. For higher current capability, select a higher-rated part (e.g., 1500W SMCJ series) or implement external current-sharing resistors with careful layout and derating.

What is the thermal resistance from junction to ambient for SMBJ180A-13-F in standard FR-4 PCB layout?

While not explicitly specified in DS19002, typical SMB-package TVS devices exhibit R_θJA ≈ 120°C/W on 1-inch² copper pad. Derating curves in the datasheet show 4.8W/°C peak power reduction above +25°C ambient, implying effective thermal management requires adequate copper area and minimal thermal via restriction for sustained surge duty.