Diodes Incorporated SMBJ24A-13-F

Overview

SMBJ24A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 24V standoff voltage, 26.7V minimum breakdown voltage at 1mA, 38.9V max clamping voltage at 15.4A peak pulse current, and SMB package. It protects DC power rails and I/O lines in industrial motor drives, PLC input modules, and telecom power supplies against ESD and lightning-induced surges.

For engineers reviewing the SMBJ24A-13-F datasheet, SMBJ24A-13-F pinout, SMBJ24A-13-F application, or SMBJ24A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC V_DD, peak pulse current capability under 8.3ms half-sine waveform, thermal derating above +25°C, and RoHS-compliant matte tin lead finish for lead-free reflow compatibility.

Technical Context

This TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds V_RWM = 24V, it transitions from high-impedance leakage mode (<5μA) to low-impedance conduction, limiting transient energy via controlled avalanche breakdown. Its glass-passivated die ensures stable V_BR tolerance (±5%) and repeatable clamping performance across temperature.

The device uses a single-junction silicon avalanche structure optimized for fast response (<1ps), low capacitance (≈100pF at 0V), and robust surge handling-capable of 100A non-repetitive forward surge (8.3ms half-sine) and 600W peak pulse power at T_A = +25°C, derated linearly at 4.8W/°C above ambient.

Key Specifications

Pinout & Package

Two-terminal unidirectional TVS in SMB package: Cathode band denotes terminal 1 (anode is terminal 2). No internal circuitry-function depends solely on polarity-sensitive avalanche junction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ24CA-13-F and SMCJ24A-13-F, SMBJ24A-13-F delivers best-in-class 600W protection in the smallest standardized footprint for unidirectional DC rail applications-balancing clamping performance, thermal response, and PCB area efficiency without over-engineering.

Availability

SMBJ24A-13-F is available at Aetrix Electronics and suitable for industrial motor drives, PLC input modules, and telecom power supplies requiring stable component supply with full traceability and lifecycle management.

Supply support for SMBJ24A-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 protection, power management, and signal integrity solutions for industrial, computing, and automotive markets.

The SMBJ series was designed specifically for robust, cost-effective transient suppression in space-constrained DC power and signal interfaces-emphasizing tight V_BR tolerance, low clamping ratio, and full compliance with international surge immunity standards.

FAQ

What is the maximum operating temperature for SMBJ24A-13-F?

The SMBJ24A-13-F has a junction temperature range of –55°C to +150°C and storage temperature range of –55°C to +175°C. Its steady-state power dissipation is rated at 5.0W at lead temperature T_L = +75°C, with thermal derating beginning at +25°C ambient (4.8W/°C slope).

Does SMBJ24A-13-F require a heatsink for 600W surge handling?

No heatsink is required for single-event 600W surge handling, as energy is dissipated within milliseconds. However, for repetitive surges or elevated ambient temperatures (>+25°C), PCB copper area (≥1 cm² per terminal) must be used to meet thermal derating curves-verified in Figure 1 of DS19002 Rev. 20-2.

How does SMBJ24A-13-F differ from SMAJ24A-13-F?

SMBJ24A-13-F (600W, SMB package) offers 2× higher peak power than SMAJ24A-13-F (400W, SMA package) and uses a larger die with improved thermal mass. The SMB outline provides better mechanical robustness and lower thermal resistance (R_θJA ≈ 120°C/W vs. SMA's ≈ 150°C/W), enabling higher surge repetition rates.

Is SMBJ24A-13-F suitable for protecting USB or Ethernet data lines?

No-it is not optimized for high-speed data lines due to its ~100pF capacitance at 0V, which would distort signals above ~10MHz. For USB 2.0 or 100BASE-TX, use low-capacitance TVS arrays (e.g., D3V3Z5U-02 or SP3012-02HTG) with <0.8pF per line and integrated ESD protection.