Diodes Incorporated SMAJ6.0A-13

Overview

SMAJ6.0A-13 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 6.0V reverse standoff voltage (VRWM), 6.67–7.37V breakdown voltage (VBR) at 10mA, 10.3V max clamping voltage (VC) at 38.8A peak pulse current (IPP), and operates from –55°C to +150°C junction temperature.

For engineers reviewing the SMAJ6.0A-13 datasheet, SMAJ6.0A-13 pinout, SMAJ6.0A-13 application, or SMAJ6.0A-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, 8.3ms surge current handling per JEDEC, unidirectional polarity requirement, and SMA package thermal performance under repetitive transients.

Technical Context

This TVS diode uses glass-passivated silicon die for stable avalanche breakdown and fast response (<1ps) to ESD and lightning-induced transients. Its unidirectional configuration provides low-leakage forward conduction path while clamping reverse surges above VRWM.

Clamping occurs at 10.3V under 38.8A 8.3ms half-sine pulse, delivering 400W peak pulse power with <800nA reverse leakage at 6.0V. Thermal derating begins above 25°C ambient, maintaining 1.0W steady-state dissipation only at TL = 75°C.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band polarity indicator, and 0.064g mass. Terminals are solderable per MIL-STD-202, Method 208.

Key Features

Applications

Availability

SMAJ6.0A-13 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, USB peripheral power management, and DC motor control systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SMAJ6.0A-13 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, signal integrity, and power management solutions for industrial, automotive, and computing markets.

The SMAJ series targets board-level transient suppression in space-constrained applications, emphasizing robust 400W surge handling, tight VBR tolerance, and consistent clamping performance across temperature.

FAQ

Is SMAJ6.0A-13 bidirectional?

No. SMAJ6.0A-13 is unidirectional, indicated by the absence of "C" in its part number. Bidirectional variants are designated SMAJ6.0CA-13 and lack a cathode band marking. Unidirectional operation enables lower leakage (<800nA at 6.0V) and defined forward conduction path to ground.

What is the maximum allowable mounting temperature during reflow?

The SMAJ6.0A-13 is qualified for standard lead-free reflow profiles with peak temperatures up to 260°C for 10 seconds, per J-STD-020C. Its UL 94V-0 molded plastic case and matte tin-plated terminals ensure reliability under these conditions without delamination or solder wetting issues.

How does clamping voltage change with pulse duration?

Clamping voltage increases with longer pulse widths due to thermal effects in the junction. At 8.3ms (JEDEC standard), VC = 10.3V; at 1ms, it drops to ~9.8V. Derating curves in DS19005 Rev. 12 show >20% reduction in sustainable IPP above 100°C ambient, directly impacting clamping consistency.

Can SMAJ6.0A-13 replace P6KE6.8A in existing designs?

No. SMAJ6.0A-13 (SMA package, 6.0V VRWM) differs electrically and mechanically from P6KE6.8A (DO-15, 6.8V VRWM). Key mismatches include 0.8V lower standoff voltage, 0.3V tighter VBR tolerance, and 30% smaller footprint-requiring PCB redesign and validation of thermal dissipation in the new package.