Microchip Technology MAPLAD36KP200AE3

Overview

MAPLAD36KP200AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤322 V under 112 A peak impulse current, and features a 200 V reverse standoff voltage (VWM), 222–245 V breakdown voltage (V(BR)), and 1.0 °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 4 (42 Ω source) requirements.

For engineers reviewing the MAPLAD36KP200AE3 datasheet, MAPLAD36KP200AE3 pinout, MAPLAD36KP200AE3 application, or MAPLAD36KP200AE3 equivalent, key selection criteria include its 200 V VWM rating, low 1.0 °C/W RθJC for thermal management in high-reliability PCB layouts, RoHS-compliant e3 termination, and verified compliance with aircraft lightning injection (DO-160F) and industrial surge immunity (IEC 61000-4-5) standards.

Technical Context

This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its 200 V standoff threshold to divert transients up to 36,000 W. Its silicon avalanche structure ensures sub-100 ps response time and stable clamping performance across -55°C to +150°C operating range.

Designed for secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance (Class 4), it supports pin-injection protection per RTCA/DO-160F Waveform 4 (6.4/69 μs) at Level 4. The metal-base cathode configuration enables direct thermal coupling to heatsinked PCB pads per recommended layout.

Key Specifications

Pinout & Package

MAPLAD36KP200AE3 uses a surface-mount PLAD package with two terminals: anode and cathode. The cathode is the metal base (bottom side) of the device, requiring direct thermal contact with a large copper pad for optimal heat dissipation. Package dimensions are 12.32 × 10.54 × 5.08 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SP36-200 and SMAJ200A, MAPLAD36KP200AE3 uniquely combines AEC-Q101 qualification, DO-160F Level 4 validation, and 1.0 °C/W RθJC-enabling reliable operation in aerospace power inputs and automotive ECUs where thermal density and regulatory compliance are non-negotiable.

Availability

MAPLAD36KP200AE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive engine control units, and industrial motor drive systems requiring stable component supply, long-lifecycle support, and traceable high-reliability sourcing.

Supply support for MAPLAD36KP200AE3 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 MAPLAD36KP200AE3 belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and automotive load-dump immunity in safety-critical power interfaces.

FAQ

What is the clamping voltage of MAPLAD36KP200AE3 at its rated peak pulse current?

The MAPLAD36KP200AE3 has a maximum clamping voltage (VC) of 322 V at 112 A peak pulse current (IPP), measured under the standard 10/1000 μs waveform. This value ensures downstream components experience limited overvoltage during high-energy transients, and is validated per Figure 3 in the RF01216 datasheet. The clamping performance remains stable across its full operating temperature range of -55°C to +150°C.

Is MAPLAD36KP200AE3 qualified for automotive applications?

Yes, MAPLAD36KP200AE3 is AEC-Q101 qualified, confirming its suitability for automotive under-hood and powertrain applications including engine control units and battery management systems. It meets stringent requirements for temperature cycling, mechanical shock, and surge endurance-specifically targeting load-dump transients up to 120 V/400 ms. Its unidirectional construction and 200 V VWM align with 24 V system architectures.

How does the thermal design of MAPLAD36KP200AE3 differ from standard SMD TVS diodes?

MAPLAD36KP200AE3 features a metal-base cathode that serves as the primary thermal conduction path, achieving a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W-significantly lower than typical SMD TVS devices (often >5 °C/W). This requires mounting the device's bottom side directly onto a large copper thermal pad per the documented pad layout. That design enables 71 W steady-state dissipation at 100°C case temperature, critical for high-duty-cycle surge environments.

Does MAPLAD36KP200AE3 meet RTCA DO-160F lightning protection requirements?

Yes, MAPLAD36KP200AE3 is explicitly validated for RTCA DO-160F Section 22 lightning-induced transient testing. It satisfies Waveform 4 (6.4/69 μs) at Level 4 and Waveform 5A (40/120 μs) at Level 4 up to 78 V VWM-well within its 200 V rating. The device's 36 kW PPP rating and sub-100 ps response time ensure compliance with multi-stroke lightning standards used in commercial and military avionics.

What is the polarity configuration and marking convention for MAPLAD36KP200AE3?

MAPLAD36KP200AE3 is a unidirectional TVS diode with cathode on the metal base (bottom side) and anode on the top metallized surface. No polarity symbol appears on the body-orientation is defined mechanically by the metal base. The "A" suffix in the part number confirms unidirectional construction, and the "E3" suffix indicates RoHS-compliant matte-tin plating. Correct PCB layout must expose the metal base to a thermal pad for both electrical and thermal integrity.