Microchip Technology MAPLAD36KP58CAE3

Overview

MAPLAD36KP58CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, features a 58 V reverse standoff voltage (VWM), clamps to ≤93.6 V at 385 A peak impulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.

For engineers reviewing the MAPLAD36KP58CAE3 datasheet, MAPLAD36KP58CAE3 pinout, MAPLAD36KP58CAE3 application, or MAPLAD36KP58CAE3 equivalent, key selection criteria include bidirectional polarity, 1.0 °C/W junction-to-case thermal resistance, IEC 61000-4-5 Class 4/5 secondary lightning compliance with 42 Ω source impedance, and RoHS-compliant e3 plating - all critical for avionics EMI hardening and load-dump protection.

Technical Context

This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its 58 V standoff threshold to divert transients away from downstream components. Its low R_θJC of 1.0 °C/W enables effective heat transfer to a heatsink, supporting sustained multi-pulse operation under RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4/5 conditions.

The bidirectional construction allows symmetric clamping for AC-coupled or floating signal lines, while its void-free UL94V-0 epoxy package ensures mechanical robustness and insulation integrity in high-vibration environments. Standby current is limited to 10 μA at V_WM, minimizing leakage impact on low-power monitoring circuits.

Key Specifications

Pinout & Package

MAPLAD36KP58CAE3 uses a surface-mount PLAD package with two terminals: anode and cathode. The metal base serves as the cathode for unidirectional variants; for bidirectional devices like MAPLAD36KP58CAE3, both terminals are symmetrical and non-polarized. Package dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), with recommended pad layout per RF01216 Rev B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ58CA and SMCJ58CA, MAPLAD36KP58CAE3 provides 24× and 24× higher peak pulse power respectively, coupled with 2.5× and 2.5× lower junction-to-case thermal resistance - enabling verified multi-stroke survivability in certified avionics installations where thermal accumulation is mission-limiting.

Availability

MAPLAD36KP58CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain electronics, and industrial motor drive designs requiring stable component supply across extended production lifecycles and rigorous environmental qualification.

Supply support for MAPLAD36KP58CAE3 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 solutions for aerospace, defense, and industrial markets.

The MAPLAD series was developed specifically for high-energy transient suppression in certified airborne systems, emphasizing multi-stroke lightning resilience, thermal robustness, and MIL-PRF-19500 upscreening readiness.

FAQ

What is the clamping voltage of MAPLAD36KP58CAE3 at its rated peak pulse current?

The MAPLAD36KP58CAE3 has a maximum clamping voltage (V_C) of 93.6 V when subjected to its rated peak impulse current (I_PP) of 385 A under 10/1000 μs waveform conditions. This value is measured across the device terminals and defines the upper voltage limit imposed on protected circuitry during surge events. The MAPLAD36KP58CAE3 maintains this clamping performance consistently across its qualified temperature range of –55°C to +150°C.

Does MAPLAD36KP58CAE3 require a heatsink for standard operation?

Yes - MAPLAD36KP58CAE3 is designed for heatsink mounting to manage thermal accumulation during multi-pulse events. Its 1.0 °C/W junction-to-case thermal resistance assumes direct metal-to-metal contact with a heatsink per the recommended FR4 pad layout in RF01216 Rev B. Without heatsinking, steady-state power dissipation is limited to 2.5 W at 25°C ambient, making passive PCB copper insufficient for repeated 36 kW surges.

Is MAPLAD36KP58CAE3 certified for RTCA DO-160F Section 22 lightning testing?

Yes - MAPLAD36KP58CAE3 is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 and Level 5. Its bidirectional construction and 36,000 W PPP rating enable it to pass full certification cycles without degradation. The MAPLAD36KP58CAE3 achieves this with ≤93.6 V clamping at 385 A, ensuring downstream ICs remain within absolute maximum ratings.

How does the 'CA' suffix in MAPLAD36KP58CAE3 indicate device functionality?

The 'CA' suffix in MAPLAD36KP58CAE3 denotes bidirectional polarity - meaning the device provides symmetrical clamping for both positive and negative transients without regard to terminal orientation. Unlike unidirectional 'A' variants where the metal base is the cathode, MAPLAD36KP58CAE3 has no polarity marking and functions identically regardless of PCB layout direction. The 'E3' suffix confirms RoHS-compliant matte-tin plating.

Can MAPLAD36KP58CAE3 be used in IEC 61000-4-5 Class 5 applications with 42 Ω source impedance?

Yes - MAPLAD36KP58CAE3 is rated for IEC 61000-4-5 Class 5 secondary lightning protection when tested with 42 Ω source impedance, covering both short- and long-distance configurations per the manufacturer's specification table. Its 36,000 W PPP and low clamping voltage ensure compliance without additional series impedance or coordination components. The MAPLAD36KP58CAE3 achieves this while maintaining ≤10 μA standby current at 58 V.