Microchip Technology MAPLAD18KP10AE3

Overview

MAPLAD18KP10AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 10 V reverse standoff voltage (VWM), clamps to ≤17.0 V at 1059 A peak impulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.

For engineers reviewing the MAPLAD18KP10AE3 datasheet, MAPLAD18KP10AE3 pinout, MAPLAD18KP10AE3 application, or MAPLAD18KP10AE3 equivalent, this device is selected for robust multi-stroke lightning protection in avionics power inputs, automotive load-dump circuits, and DC bus overvoltage suppression where low clamping voltage, high IPP, and traceable high-reliability screening are mandatory.

Technical Context

This TVS diode employs an avalanche breakdown structure optimized for fast response (<100 ps) and stable clamping under repetitive 10/1000 μs transients. Its metal-base package enables direct thermal coupling to heatsinks, supporting sustained energy dissipation with RθJC = 0.7 °C/W and derated PPP up to 71 W at TC = 100°C.

It operates within -55°C to +150°C junction temperature range and complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and RTCA DO-160F pin-injection standards. Polarity is defined by cathode on the metal base - critical for correct PCB layout and grounding in high-side protection configurations.

Key Specifications

Pinout & Package

MAPLAD18KP10AE3 uses a surface-mount plastic package with metal base (cathode) and two solder terminals. The case is void-free thermosetting epoxy (UL94V-0), with matte-tin plating compliant with MIL-STD-750 Method 2026. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ10A and SM8S10A, MAPLAD18KP10AE3 uniquely combines 18 kW PPP, DO-160F Waveform 4 Level 4 certification, AEC-Q101 qualification, and metal-base thermal performance - making it irreplaceable in safety-critical aerospace and high-end automotive power protection.

Availability

MAPLAD18KP10AE3 is available at Aetrix Electronics and suitable for avionics power input protection, automotive load-dump suppression, and industrial DC bus overvoltage clamping requiring stable component supply, long-term lifecycle support, and traceable high-reliability screening.

Supply support for MAPLAD18KP10AE3 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.

The MAPLAD18KP10AE3 belongs to Microsemi's PLAD high-power TVS family, engineered specifically for multi-stroke lightning and load-dump protection in mission-critical platforms where thermal robustness and certification compliance are non-negotiable.

FAQ

What is the clamping voltage of MAPLAD18KP10AE3 at its rated peak pulse current?

The MAPLAD18KP10AE3 has a maximum clamping voltage (V_C) of 17.0 V at its rated peak impulse current (I_PP) of 1059 A under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and ensures downstream components remain within safe voltage limits during surge events. The MAPLAD18KP10AE3 achieves this while maintaining low thermal resistance for repeatable performance.

Is MAPLAD18KP10AE3 qualified for automotive applications?

Yes, MAPLAD18KP10AE3 is AEC-Q101 qualified, confirming its reliability for automotive underhood environments including thermal cycling, humidity, and mechanical shock. It meets ISO 7637-2 Pulse 5a load-dump requirements and supports automotive ECUs, ADAS power supplies, and battery management systems. The MAPLAD18KP10AE3 also provides traceable wafer and assembly lot records per high-reliability standards.

Does MAPLAD18KP10AE3 meet RTCA DO-160F lightning protection requirements?

Yes, MAPLAD18KP10AE3 is validated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4, making it suitable for commercial aircraft power inputs. Its 18 kW PPP rating and metal-base thermal design enable compliance with multi-stroke lightning standards. The MAPLAD18KP10AE3 is explicitly listed in Microsemi's RF01215 documentation for these certifications.

What is the thermal resistance and how does it affect PCB layout for MAPLAD18KP10AE3?

MAPLAD18KP10AE3 has a junction-to-case thermal resistance (R_θJC) of 0.7 °C/W, achieved via direct metal-base mounting. This requires the cathode (metal bottom) to be soldered to a large copper pour or external heatsink - not just standard pads. Poor thermal coupling causes rapid PPP derating; the MAPLAD18KP10AE3 datasheet specifies pad layout dimensions to maintain this thermal path integrity.

How does the e3 suffix in MAPLAD18KP10AE3 indicate RoHS compliance?

The "e3" suffix in MAPLAD18KP10AE3 denotes RoHS-compliant matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity - no dry pack required. This ensures compatibility with lead-free reflow profiles and eliminates Pb-based solder concerns. The MAPLAD18KP10AE3 maintains identical electrical and thermal specs as non-RoHS versions, with full traceability and screening retained.