Microchip Technology MPLAD18KP10CA

Overview

MPLAD18KP10CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. 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 <5 ns response time. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for Waveform 4.

For engineers reviewing the MPLAD18KP10CA datasheet, MPLAD18KP10CA pinout, MPLAD18KP10CA application, or MPLAD18KP10CA equivalent, key selection criteria include its bidirectional polarity, 10 V working voltage, low clamping ratio (VC/VWM = 1.7), IEC 61000-4-5 Class 1–5 secondary lightning compliance, and suitability for high-reliability avionics power bus protection.

Technical Context

The MPLAD18KP10CA employs a silicon avalanche diode structure optimized for fast transient suppression with sub-5 ns response. Its thermal design achieves 0.7 °C/W junction-to-case resistance and supports 18 kW surges under 0.05% duty cycle per MIL-STD-750 test conditions.

It operates bidirectionally across ±10 V standoff, with breakdown voltage V(BR) specified at 11.1–12.3 V @ I(BR), and clamping voltage VC ≤17.0 V at IPP = 1059 A (10/1000 μs). Standby leakage ID is ≤45 μA at VWM, enabling low-power system compatibility.

Key Specifications

Pinout & Package

Package: Surface-mount PLAD (Plastic Low-profile Avalanche Diode) with metal base cathode contact. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight ≈1 g; RoHS-compliant matte-tin terminations; UL94V-0 epoxy body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ10CA and SMCJ10CA, the MPLAD18KP10CA delivers 30× and 12× higher peak pulse power respectively, with certified aerospace and automotive qualifications, lower thermal resistance, and validated multi-stroke endurance-making it the only option for mission-critical lightning protection where single-event failure is unacceptable.

Availability

MPLAD18KP10CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive power electronics, railway signaling systems, and industrial motor drives requiring stable component supply with long-term lifecycle assurance.

Supply support for MPLAD18KP10CA 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, communications, and industrial markets, with expertise in radiation-hardened ICs, timing devices, and power protection components.

The MPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms, emphasizing multi-stroke survivability, low thermal resistance, and compliance with RTCA DO-160, AEC-Q101, and IEC 61000-4-x standards.

FAQ

What is the clamping voltage of MPLAD18KP10CA at its rated peak pulse current?

The MPLAD18KP10CA has a maximum clamping voltage (VC) of 17.0 V when subjected to its rated peak impulse current (IPP) of 1059 A under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and ensures downstream circuitry remains below safe voltage thresholds during surge events. The clamping performance is guaranteed across the full operating temperature range and is integral to its DO-160F and IEC 61000-4-5 compliance.

Is MPLAD18KP10CA qualified for automotive applications?

Yes, the MPLAD18KP10CA is fully qualified to AEC-Q101 for automotive use. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and surge endurance-to ensure reliability in engine control units, battery management systems, and ADAS modules. Its bidirectional construction and 10 V standoff make it suitable for protecting 12 V power rails against load dump and ISO 7637-2 transients.

Does MPLAD18KP10CA require special PCB layout considerations?

Yes, optimal performance requires adherence to the recommended pad layout: a large copper pour beneath the metal base (cathode) for thermal dissipation and low-inductance grounding, plus minimized trace length between the device and protected line. The datasheet specifies minimum pad dimensions (12.32 × 10.54 mm) and recommends FR4 board mounting with controlled thermal vias. Deviation increases clamping voltage and reduces surge endurance.

How does the bidirectional configuration of MPLAD18KP10CA affect its use in DC circuits?

The bidirectional configuration of MPLAD18KP10CA allows it to protect both polarities of a DC line without regard to voltage polarity-ideal for floating or AC-coupled interfaces. In a 10 V DC system, it clamps positive excursions above +17.0 V and negative excursions below –17.0 V, making it suitable for protecting differential buses, shielded cables, or systems subject to reverse-polarity faults. Its symmetric V(BR) ensures balanced protection behavior.

Can MPLAD18KP10CA be used in parallel for higher surge capacity?

No, MPLAD18KP10CA is not intended for parallel operation. Its avalanche characteristics are not matched for current sharing, and paralleling introduces imbalance risks that may cause premature failure of one unit. For higher energy requirements, select a higher-voltage variant (e.g., MPLAD18KP13CA) or implement staged protection with upstream GDTs-both approaches are validated in Microsemi's application guidance for DO-160F-compliant designs.