Microchip Technology MAPLAD18KP58CAE3

Overview

MAPLAD18KP58CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 58 V reverse standoff voltage (VWM), clamps to ≤93.6 V at 207 A peak impulse current (IPP), and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 secondary lightning protection requirements.

For engineers reviewing the MAPLAD18KP58CAE3 datasheet, MAPLAD18KP58CAE3 pinout, MAPLAD18KP58CAE3 application, or MAPLAD18KP58CAE3 equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity, low thermal resistance (RθJC = 0.7 °C/W), and RoHS-compliant e3 plating are mandatory design criteria.

Technical Context

This TVS operates as a clamping-type protector with symmetrical bidirectional avalanche breakdown. Its metal-base package enables direct thermal coupling to heatsinks, supporting sustained surge handling under ≤0.05% duty cycle per Figure 2. The device exhibits <5 ns response time and maintains stable clamping performance across -55°C to +150°C junction temperature range.

Designed for compliance with AEC-Q101 and MIL-PRF-19500 upscreening options, MAPLAD18KP58CAE3 integrates wafer-level traceability and 3σ lot norm screening on standby current (ID ≤10 μA @ 58 V). It satisfies IEC 61000-4-2 ESD (±30 kV air), IEC 61000-4-4 EFT (40 A), and RTCA/DO-160F pin injection standards without external circuitry.

Key Specifications

Pinout & Package

MAPLAD18KP58CAE3 uses a low-profile surface-mount plastic package with metal baseplate for thermal conduction. The cathode is the metal base (bottom side); anode is the top-side metallized pad. Package dimensions: 12.32 × 10.54 × 5.33 mm (L × W × H), compliant with IPC/JEDEC J-STD-020B moisture level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ58CA and SMCJ58CA, MAPLAD18KP58CAE3 delivers 12× and 12× higher peak pulse power respectively, includes full DO-160F and AEC-Q101 qualification, and offers superior thermal management via metal-base construction-making it the only option for certified multi-stroke lightning protection in safety-critical platforms.

Availability

MAPLAD18KP58CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU design, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and certified surge immunity.

Supply support for MAPLAD18KP58CAE3 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) designs high-reliability semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-power, and timing-critical applications.

MAPLAD18KP58CAE3 belongs to the PLAD family of high-power surface-mount TVS diodes engineered specifically for certified lightning and load-dump protection in mission-critical systems where thermal performance and regulatory compliance are non-negotiable.

FAQ

What is the clamping voltage specification for MAPLAD18KP58CAE3 under standard test conditions?

The MAPLAD18KP58CAE3 has a maximum clamping voltage (VC) of 93.6 V at 207 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured with case temperature controlled per specification and reflects worst-case performance across manufacturing lots and temperature extremes. The clamping voltage ensures downstream components remain within safe operating limits during surge events.

Does MAPLAD18KP58CAE3 meet RTCA DO-160F lightning protection requirements?

Yes, MAPLAD18KP58CAE3 is validated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) Level 4 at 25°C ambient, and supports Level 5 up to 130 V variants. Its 18 kW PPP rating, sub-5 ns response, and metal-base thermal design enable compliance with multi-stroke lightning standards required for commercial aircraft avionics installations.

How is thermal management implemented in MAPLAD18KP58CAE3?

MAPLAD18KP58CAE3 uses a metal-base surface-mount package where the cathode forms the entire bottom surface, enabling direct thermal conduction to PCB copper pours or external heatsinks. With a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W, it sustains repeated 10/1000 μs surges at ≤0.05% duty cycle without exceeding 150°C junction temperature when properly mounted.

Is MAPLAD18KP58CAE3 RoHS compliant and what does the 'e3' suffix indicate?

Yes, MAPLAD18KP58CAE3 is RoHS compliant, as confirmed by the 'e3' suffix in its part number. This denotes annealed matte-tin plating that meets JEDEC J-STD-020B moisture sensitivity level 1 and supports lead-free reflow soldering at 260°C for 10 seconds without degradation of electrical or mechanical performance.

What is the difference between unidirectional and bidirectional versions in the MPLAD18KP family?

The 'A' suffix (e.g., MPLAD18KP58A) indicates unidirectional operation-clamping only in reverse bias-while 'CA' (e.g., MAPLAD18KP58CAE3) denotes bidirectional symmetry, enabling protection of AC signals or floating DC nodes without polarity concerns. Bidirectional devices have identical VWM and clamping behavior for both polarities, verified per IEC 61000-4-5 testing protocols.