Microchip Technology MXLDA3KP17CAE3

Overview

MXLDA3KP17CAE3 from Microsemi is a bidirectional 3000 W transient voltage suppressor (TVS) array in DO-214AB (SMC) package, designed for high-reliability surge protection. It features 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (V(BR)), 27.6 V clamping voltage at 106.6 A peak pulse current, and operates from −55 °C to +150 °C. It protects industrial power supplies and telecom interfaces against IEC61000-4-5 secondary lightning surges.

For engineers reviewing the MXLDA3KP17CAE3 datasheet, MXLDA3KP17CAE3 pinout, MXLDA3KP17CAE3 application, or MXLDA3KP17CAE3 equivalent, key selection criteria include bidirectional polarity, 10/1000 µs surge rating, RoHS-compliant matte-tin plating, and MIL-PRF-19500 upscreening eligibility for aerospace-grade reliability validation.

Technical Context

The MXLDA3KP17CAE3 implements a silicon avalanche diode structure optimized for sub-5 ns response time and low clamping ratio (VC/V(BR) ≈ 1.38). Its bidirectional configuration enables symmetrical clamping across both polarities without external series components, supporting AC-coupled signal lines and ungrounded bus protection.

Rated for 3000 W peak pulse power at 10/1000 µs waveform, it meets IEC61000-4-5 Class 1–4 with 42 Ω source impedance and Class 1–3 with 12 Ω, while maintaining <2 µA standby current at 17 V and moisture sensitivity level 1 per J-STD-020B.

Key Specifications

Pinout & Package

MXLDA3KP17CAE3 uses the DO-214AB (SMC) surface-mount package: void-free UL94V-0 epoxy body, matte-tin plated terminals per MIL-STD-750 Method 2026, 5 g mass, and polarity defined by dot marking indicating Pin 1 (cathode for unidirectional variants; symmetric for bidirectional).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ17CA and 1.5KE17CA, MXLDA3KP17CAE3 delivers 5× higher surge capacity in SMT form factor with military-grade screening support-critical for rail, energy, and defense systems requiring validated long-term reliability under repetitive surge stress.

Availability

MXLDA3KP17CAE3 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, renewable energy inverters, and railway signaling interfaces requiring stable component supply across extended product lifecycles.

Supply support for MXLDA3KP17CAE3 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 analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.

The MDA3KP series targets high-energy transient suppression in mission-critical infrastructure, emphasizing surge robustness, thermal stability, and qualification-ready manufacturing for harsh-environment deployment.

FAQ

What is the clamping voltage of MXLDA3KP17CAE3 at its rated peak pulse current?

The MXLDA3KP17CAE3 has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPP) of 106.6 A under 10/1000 µs waveform conditions. This value is measured per Figure 2 in the official RF01243 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The clamping performance remains stable across the full operating temperature range of −55 °C to +150 °C.

Is MXLDA3KP17CAE3 RoHS compliant and what does the 'e3' suffix indicate?

Yes, MXLDA3KP17CAE3 is RoHS compliant, as confirmed by the 'e3' suffix in its part number per Microsemi's nomenclature guide (Page 2, RF01243 Rev B). The 'e3' designation specifies annealed matte-tin plating meeting JEDEC/IPC standards and full compliance with Directive 2011/65/EU, including lead content below 1000 ppm. No exemptions apply, and the device carries full material declaration documentation.

Does MXLDA3KP17CAE3 support MIL-PRF-19500 upscreening and what does that entail?

MXLDA3KP17CAE3 supports optional MIL-PRF-19500 upscreening per Micronote 129, including wafer lot traceability, 3σ screening on standby current (ID), and conformance inspections for high-reliability programs. While the base part is commercial-grade, upscreened units undergo additional burn-in, parametric verification, and failure analysis protocols-making them suitable for defense avionics and satellite subsystems where field failure rates must be quantified and minimized.

What is the thermal derating behavior of MXLDA3KP17CAE3 above 25 °C ambient?

MXLDA3KP17CAE3 follows a linear derating curve beginning at 25 °C, with peak pulse power reduced to 50% at +125 °C and zero at +150 °C (per Figure 3, RF01243 Rev B). This reflects junction temperature limits rather than ambient alone; actual derating depends on PCB copper area, airflow, and thermal vias. For sustained operation above 85 °C, thermal simulation using the device's RθJA of ~50 °C/W is recommended to ensure safe clamping margins.

How does the bidirectional configuration of MXLDA3KP17CAE3 affect its use in differential signal protection?

The bidirectional configuration of MXLDA3KP17CAE3 allows direct placement across differential pairs (e.g., RS-485 A/B, CAN H/L) without polarity concerns, providing symmetrical clamping for both positive and negative transients. Unlike unidirectional TVS arrays, it eliminates the need for dual devices or external biasing, reduces component count by 50%, and maintains matched dynamic impedance-critical for preserving common-mode rejection and signal timing skew in high-speed data links.