Microchip Technology MPLAD36KP54AE3

Overview

MPLAD36KP54AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤87.1 V under 414 A peak impulse current, and features a 54 V reverse standoff voltage (VWM), 60–66.3 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per IEC 61000-4-5 and RTCA DO-160F Waveform 4 Level 4.

For engineers reviewing the MPLAD36KP54AE3 datasheet, MPLAD36KP54AE3 pinout, MPLAD36KP54AE3 application, or MPLAD36KP54AE3 equivalent, this device is selected for high-reliability DC bus protection where fast clamping (<100 ps response), low thermal resistance, RoHS-compliant matte-tin terminations, and MIL-PRF-19500 upscreening capability are critical design requirements.

Technical Context

This TVS diode operates as a clamping-type overvoltage protector with avalanche breakdown behavior. Its unidirectional polarity places the cathode on the metal base (package bottom), requiring PCB layout alignment for proper grounding and thermal conduction. The device is rated for junction temperatures from –55°C to +150°C and exhibits a +64 mV/°C temperature coefficient of breakdown voltage (αV(BR)).

It meets IEC 61000-4-2 ESD (±30 kV contact), IEC 61000-4-4 EFT (40 A), and IEC 61000-4-5 surge immunity (Class 1–5, depending on source impedance), with validated performance under RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 up to 400 V VWM variants. Steady-state power dissipation is 2.5 W at 25°C ambient.

Key Specifications

Pinout & Package

Package: PLAD (Plastic Leaded Anvil Device), surface-mount, void-free UL94V-0 epoxy body with tin-lead or RoHS-compliant matte-tin plating; dimensions 12.32 × 10.54 × 5.08 mm (L × W × H); weight ~1.7–2.0 g; polarity marked on unidirectional versions only - cathode is the metal base (bottom side).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ54A and SMCJ54A, the MPLAD36KP54AE3 provides 24× and 24× higher peak pulse power respectively, full DO-160F Waveform 4 Level 4 validation, and optional MIL-PRF-19500 screening - making it the sole choice for aerospace, rail, and high-reliability automotive power systems demanding multi-stroke survivability.

Availability

MPLAD36KP54AE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain modules, and industrial motor drive designs requiring stable component supply, long-term lifecycle assurance, and traceable high-reliability sourcing.

Supply support for MPLAD36KP54AE3 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 for aerospace, defense, and industrial markets.

The MPLAD series was developed specifically for high-power, surface-mount transient suppression in mission-critical platforms where thermal management, multi-stroke endurance, and regulatory compliance (DO-160, AEC-Q101, IEC 61000-4-x) are mandatory.

FAQ

What is the clamping voltage of MPLAD36KP54AE3 at its rated peak pulse current?

The MPLAD36KP54AE3 has a maximum clamping voltage (VC) of 87.1 V at its rated peak pulse current (IPP) of 414 A under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and ensures downstream components see limited overvoltage stress during worst-case surge events. The MPLAD36KP54AE3 achieves this while maintaining <100 ps response time from 0 V to V(BR) min.

Is MPLAD36KP54AE3 suitable for bidirectional signal line protection?

No, MPLAD36KP54AE3 is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). Its cathode is the metal base, and it conducts only during positive transients on the anode side. For bidirectional protection, Microsemi offers the MPLAD36KP54CA variant. Using MPLAD36KP54AE3 on AC or differential lines without external steering circuitry will result in improper clamping behavior and potential failure.

Does MPLAD36KP54AE3 require a heatsink for standard operation?

While the MPLAD36KP54AE3 has a low 1.0 °C/W junction-to-case thermal resistance, it does not require an external heatsink for single-event surge suppression. However, for repetitive surges (>0.05% duty cycle) or elevated ambient temperatures, mounting the metal base directly to a ≥25 cm² internal copper pour or external heatsink is required to maintain junction temperature below +150°C. The MPLAD36KP54AE3 pad layout specification mandates this for thermal reliability.

What does the "E3" suffix mean in MPLAD36KP54AE3?

"E3" denotes RoHS-compliant matte-tin plating per JEDEC J-STD-020B, with moisture sensitivity level (MSL) 1 - meaning no dry-pack baking is required prior to reflow. This distinguishes MPLAD36KP54AE3 from non-RoHS variants (blank suffix) and confirms compliance with EU Directive 2011/65/EU. All electrical and thermal specifications for MPLAD36KP54AE3 remain identical to non-E3 versions.

Can MPLAD36KP54AE3 be used in automotive applications requiring AEC-Q101 qualification?

Yes, MPLAD36KP54AE3 is explicitly tested and qualified to AEC-Q101 standards for discrete semiconductors, including high-temperature operating life, temperature cycling, and surge robustness. Its qualification supports use in automotive powertrain, body control, and ADAS modules where transient immunity and long-term reliability under thermal stress are mandated. The MPLAD36KP54AE3 lot traceability and 3σ screening on standby current further align with AEC-Q101 process requirements.