Microchip Technology MDA3KP15AE3

Overview

MDA3KP15AE3 from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array with 15 V standoff voltage (VWM), 16.7–18.5 V breakdown voltage (V(BR)), and 24.4 V maximum clamping voltage (VC) at 123 A peak pulse current. It provides secondary lightning protection per IEC61000-4-5 (42 Ω, Class 1–4), ESD/EFT suppression per IEC61000-4-2/4-4, and inductive switching transient protection in power supply input stages.

For engineers reviewing the MDA3KP15AE3 datasheet, MDA3KP15AE3 pinout, MDA3KP15AE3 application, or MDA3KP15AE3 equivalent, key selection criteria include its 15 V VWM rating, 24.4 V VC at 123 A, RoHS-compliant e3 termination, -55°C to +150°C operating junction temperature, and unidirectional polarity for DC-biased protection circuits.

Technical Context

The MDA3KP15AE3 operates as a silicon avalanche diode-based TVS, triggered when reverse voltage exceeds its 16.7–18.5 V breakdown range. Its <100 ps response time enables effective suppression of ESD events and fast transients. The device sustains 3000 W peak pulse power under 10/1000 µs waveform conditions with ≤0.05% duty cycle.

Designed for surface-mount vertical mounting, it uses a void-free UL94V-0 epoxy package with tin-lead or matte-tin plating. Polarity is defined by dot marking: odd-numbered pins are cathodes. Standby leakage ID is ≤2 µA at 15 V VWM, supporting low-power system monitoring integrity.

Key Specifications

Pinout & Package

MDA3KP15AE3 is housed in a vertical-mount, transfer-molded thermosetting epoxy package (UL94V-0) weighing ~5 g. Pin 1 is marked by a dot on the top surface; odd-numbered pins are cathodes. Package outline matches standard TO-277A (SMB-like vertical variant) with dimensions: A = 21.03–22.05 mm (length), B = 6.86–7.87 mm (width), C = 8.64–9.65 mm (height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ15A and SMCJ15A, MDA3KP15AE3 delivers triple the peak pulse power of SMCJ15A and five times that of SMAJ15A while maintaining identical 15 V VWM and 24.4 V clamping - enabling single-device compliance with demanding industrial and telecom surge standards without parallel stacking.

Availability

MDA3KP15AE3 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and medical imaging power rails requiring stable component supply across extended production lifecycles.

Supply support for MDA3KP15AE3 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) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, RF solutions, and discrete protection devices.

The MDA3KP series was developed for mission-critical surge protection in aerospace, defense, and industrial systems requiring MIL-PRF-19500 upscreening, high-temperature operation, and guaranteed 3000 W transient immunity.

FAQ

What is the clamping voltage of MDA3KP15AE3 at its rated peak pulse current?

The MDA3KP15AE3 has a maximum clamping voltage (VC) of 24.4 V at 123 A peak pulse current (IPP), measured under 10/1000 µs waveform conditions. This value ensures downstream 15 V-rated components remain within safe operating limits during surge events. The clamping performance is validated per Figure 2 in the RF01243 datasheet and remains stable across the full -55°C to +150°C junction temperature range.

Is MDA3KP15AE3 RoHS compliant and what does the 'e3' suffix indicate?

Yes, MDA3KP15AE3 is RoHS compliant. The 'e3' suffix denotes matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity, with no dry pack required. This termination supports lead-free reflow soldering up to 260°C for 10 seconds and meets EU Directive 2011/65/EU requirements. The e3 marking appears on the device body alongside the date code and part number.

How does MDA3KP15AE3 differ from bidirectional variants like MDA3KP15CE3?

MDA3KP15AE3 is unidirectional, conducting only during positive overvoltage events relative to ground, whereas MDA3KP15CE3 is bidirectional and clamps both polarities. The 'A' suffix indicates unidirectional construction with cathode-anode polarity; 'C' denotes bidirectional symmetry. MDA3KP15AE3 is selected for DC-biased rails like 15 V microcontroller supplies, while MDA3KP15CE3 suits AC-coupled or floating signal lines.

What is the standoff voltage rating and why is it critical for MDA3KP15AE3 selection?

The MDA3KP15AE3 has a rated working standoff voltage (VWM) of 15 V - the maximum continuous voltage it blocks without clamping. This must be ≥ the peak operating voltage of the protected circuit. Selecting a VWM too close to operating voltage risks nuisance clamping; selecting too high compromises clamping responsiveness. For a nominal 12 V system with 15 V transients, MDA3KP15AE3 provides optimal margin.

Can MDA3KP15AE3 be used for IEC61000-4-5 Class 4 secondary lightning protection?

Yes, MDA3KP15AE3 is explicitly rated for IEC61000-4-5 Class 4 secondary lightning protection with 42 Ω source impedance, as confirmed in the Applications/Benefits section of RF01243 Rev B. Its 3000 W peak pulse power and 24.4 V clamping at 123 A meet the 4 kV test requirement. Performance is validated across temperature and requires proper PCB layout with low-inductance grounding per Figure 3 derating curve guidance.