Microchip Technology MXLDA3KP12CAE3

Overview

MXLDA3KP12CAE3 from Microsemi is a bidirectional 3000 W transient voltage suppressor (TVS) array in a surface-mount DO-214AB package, designed for high-reliability secondary lightning and ESD protection. It features a 12 V reverse standoff voltage (VWM), 13.3–14.7 V breakdown voltage (V(BR)), 19.9 V maximum clamping voltage at 150.6 A peak pulse current, and operates from –55 °C to +150 °C - deployed in telecom power interfaces and industrial I/O protection circuits.

For engineers reviewing the MXLDA3KP12CAE3 datasheet, MXLDA3KP12CAE3 pinout, MXLDA3KP12CAE3 application, or MXLDA3KP12CAE3 equivalent, key selection criteria include bidirectional clamping behavior, 10/1000 µs surge rating, IEC61000-4-2/4-4/4-5 compliance level mapping, and RoHS-compliant matte-tin termination with UL94V-0 epoxy body.

Technical Context

The MXLDA3KP12CAE3 implements a symmetrical avalanche diode structure enabling equal clamping in both polarities, supporting bidirectional transient suppression without polarity-sensitive placement. Its <100 ps response time ensures effective ESD mitigation per IEC61000-4-2, while the 3000 W peak pulse power rating at 10/1000 µs waveform meets Class 1–4 secondary lightning requirements under 42 Ω, 12 Ω, and 2 Ω source impedances.

Designed for surface-mount assembly on high-density PCBs, it uses a void-free thermosetting epoxy case rated UL94V-0 and tin-lead or matte-tin plating compliant with MIL-STD-750 Method 2026. Polarity is defined by dot marking; odd-numbered pins are cathodes - critical for correct orientation in dual-rail or AC-coupled signal lines.

Key Specifications

Pinout & Package

MXLDA3KP12CAE3 is housed in a DO-214AB (SMC) plastic package with two terminals: Pin 1 (cathode) and Pin 2 (anode), marked by a dot adjacent to Pin 1. The package measures 8.64–9.65 mm × 6.86–7.87 mm × 21.03–22.05 mm (L×W×H) and weighs ~5 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ12CA and SMCJ12CA, MXLDA3KP12CAE3 delivers 2× and 2.7× higher peak pulse power respectively, enabling robust Class 4 secondary lightning protection in harsh industrial and telecom environments - critical where failure risk must be minimized across full temperature range and lifetime cycles.

Availability

MXLDA3KP12CAE3 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, automotive body control modules, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for MXLDA3KP12CAE3 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

Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened ICs and discrete components.

The MDA3KP series was developed for mission-critical transient suppression in aerospace, defense, and industrial systems where failure is not an option - emphasizing surge endurance, temperature stability, and traceable manufacturing.

FAQ

What does the 'C' in MXLDA3KP12CAE3 indicate?

The 'C' suffix in MXLDA3KP12CAE3 denotes bidirectional polarity - meaning the device provides symmetrical clamping for both positive and negative transients. This eliminates orientation sensitivity during PCB placement and supports AC-coupled or dual-rail DC applications. Unlike unidirectional variants (e.g., MXLDA3KP12AE3), MXLDA3KP12CAE3 has no anode/cathode distinction in normal operation, making it ideal for protecting balanced signal lines or floating power rails.

Is MXLDA3KP12CAE3 RoHS compliant?

Yes, MXLDA3KP12CAE3 is RoHS compliant, as confirmed by the 'e3' suffix in its part number. This indicates matte-tin plating and lead-free construction meeting EU Directive 2011/65/EU. The device uses void-free thermosetting epoxy conforming to UL94V-0 and is compatible with standard Pb-free reflow profiles up to 260 °C for 10 seconds.

What is the maximum clamping voltage of MXLDA3KP12CAE3 and at what current?

The maximum clamping voltage (VC) of MXLDA3KP12CAE3 is 19.9 V, measured at its peak pulse current (IPP) of 150.6 A under the 10/1000 µs waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events - a critical parameter for ensuring downstream components remain within their absolute maximum ratings.

Can MXLDA3KP12CAE3 be used for IEC61000-4-5 Class 4 lightning protection?

Yes, MXLDA3KP12CAE3 is rated for IEC61000-4-5 Class 4 secondary lightning protection when tested with a 42 Ω source impedance. Its 3000 W peak pulse power and 150.6 A IPP capability meet the 4 kV test level requirement. For 12 Ω or 2 Ω source impedances, it supports Class 1–3 and Class 2–4 respectively - consult Figure 3 for temperature derating above 85 °C ambient.

What package type does MXLDA3KP12CAE3 use and how is polarity identified?

MXLDA3KP12CAE3 uses the DO-214AB (SMC) surface-mount package. Polarity is identified by a molded dot on the top surface adjacent to Pin 1, which is designated as the cathode. In bidirectional configuration, this marking still applies - Pin 1 and Pin 2 form a symmetrical junction, but the dot ensures consistent orientation during automated placement and visual inspection.