Microchip Technology MADA3KP26A

Overview

MADA3KP26A from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array designed for high-reliability secondary lightning and ESD protection in power supply inputs, telecom interfaces, and industrial control I/O. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown range (V(BR)), 42.1 V maximum clamping voltage at 71.2 A peak pulse current, and operates from −55 °C to +150 °C.

For engineers reviewing the MADA3KP26A datasheet, MADA3KP26A pinout, MADA3KP26A application, or MADA3KP26A equivalent, key selection criteria include clamping performance under 10/1000 µs surge, standoff voltage margin relative to system DC rail, thermal derating above 25 °C, and compliance with IEC61000-4-2/4-4/4-5 test levels for industrial and telecom equipment.

Technical Context

The MADA3KP26A is a single-channel unidirectional TVS diode optimized for fast transient suppression in DC power rails and signal lines where polarity is fixed. Its sub-100 ps response time enables effective ESD and EFT mitigation per IEC61000-4-2 and IEC61000-4-4, while its 3000 W peak pulse power rating supports robust secondary lightning protection per IEC61000-4-5 with 42 Ω, 12 Ω, and 2 Ω source impedances.

It uses a void-free thermosetting epoxy package rated UL94V-0, tin-lead or matte-tin terminations compliant with MIL-STD-750 Method 2026, and achieves Level 1 moisture sensitivity per J-STD-020B-eliminating dry-pack requirements. Polarity is defined by dot marking; Pin 1 is cathode.

Key Specifications

Pinout & Package

MDA3KP26A is housed in a surface-mount, void-free thermosetting epoxy package (UL94V-0) with two terminals. Pin 1 (cathode) is marked by a dot on the top surface; Pin 2 is anode. The package measures 21.03–22.05 mm × 6.86–7.87 mm × 8.64–9.65 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 SMAJ26A and SMCJ26A, the MADA3KP26A delivers double the surge energy handling of SMCJ26A and five times that of SMAJ26A-enabling single-device compliance with IEC61000-4-5 Class 4 at 42 Ω, critical for infrastructure-grade reliability.

Availability

MADA3KP26A is available at Aetrix Electronics and suitable for industrial PLC I/O protection, telecom power input protection, and automotive body control module designs requiring stable component supply and long-term lifecycle support.

Supply support for MADA3KP26A 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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The MDA3KP series was developed to deliver MIL-PRF-19500–qualified transient protection for mission-critical systems where failure is not an option-emphasizing surge robustness, temperature stability, and full lot traceability.

FAQ

What is the clamping voltage of MADA3KP26A at its rated peak pulse current?

The MADA3KP26A has a maximum clamping voltage (V_C) of 42.1 V at its peak pulse current (I_PP) of 71.2 A under 10/1000 µs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is validated per Figure 2 in the official RF01243 datasheet. Designers must verify that downstream components tolerate this clamping level.

Is MADA3KP26A RoHS compliant?

Yes, MADA3KP26A is RoHS compliant, indicated by the "e3" suffix in its full manufacturer marking per page 2 of RF01243 Rev B. The device uses annealed matte-tin plating on terminals and meets lead-free soldering requirements up to 260 °C for 10 seconds. Compliance is verified through material declarations and process controls aligned with EU Directive 2011/65/EU.

Does MADA3KP26A support bidirectional transient suppression?

No, MADA3KP26A is a unidirectional TVS device. Its part number lacks the "C" suffix used for bidirectional variants (e.g., MDA3KP26CA). It conducts only when cathode voltage exceeds anode by ≥V(BR), making it suitable for DC rails with fixed polarity. For AC or dual-polarity signal lines, a bidirectional variant must be selected.

What is the standoff voltage rating of MADA3KP26A, and how should it be applied in circuit design?

MADA3KP26A has a rated working standoff voltage (VWM) of 26 V, meaning it remains non-conductive up to this DC or peak AC voltage across its terminals. In design, VWM must be ≥10–20% higher than the maximum normal operating voltage of the protected line to avoid leakage or thermal runaway-e.g., use with 24 V nominal systems.

Can MADA3KP26A be used for IEC61000-4-5 Class 4 secondary lightning protection?

Yes, MADA3KP26A is explicitly rated for IEC61000-4-5 Class 4 secondary lightning protection with a 42 Ω source impedance, as confirmed in the Applications/Benefits section of RF01243 Rev B. Its 3000 W peak pulse power and 71.2 A I_PP meet the 4 kV test level requirement. Performance degrades above 25 °C per Figure 3 derating curve.