Microchip Technology MADA3KP33AE3

Overview

MADA3KP33AE3 from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array with 33 V standoff voltage (VWM), 36.7–40.6 V breakdown voltage (V(BR)), and 53.3 V clamping voltage (VC) at 56.2 A peak pulse current; used for secondary lightning protection per IEC61000-4-5 in telecom power interfaces.

For engineers reviewing the MADA3KP33AE3 datasheet, MADA3KP33AE3 pinout, MADA3KP33AE3 application, or MADA3KP33AE3 equivalent, key selection criteria include standoff voltage matching system DC rail, clamping voltage margin below IC absolute maximum ratings, surge current capability under 10/1000 µs waveform, and RoHS-compliant e3 termination plating.

Technical Context

This TVS array operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (33 V), avalanches at V(BR) min (36.7 V), and clamps transients to ≤53.3 V at 56.2 A IPP. Its <100 ps response time enables ESD (IEC61000-4-2) and EFT (IEC61000-4-4) suppression.

Designed for vertical mounting on PCBs, it uses a void-free thermosetting epoxy case (UL94V-0), tin-lead or matte-tin plating per MIL-STD-750, and polarity defined by dot-marked Pin 1 (cathode). Standby leakage ID is ≤2 µA at VWM.

Key Specifications

Pinout & Package

Package: Surface-mount vertical TO-277A (3-pin, single-row, cathode-marked). Dimensions: 21.03–22.05 mm × 6.86–7.87 mm × 8.64–9.65 mm (L×W×H); weight ≈5 g; UL94V-0 epoxy body; matte-tin or tin-lead terminations; RoHS-compliant e3 marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ33A and SMCJ33A, the MADA3KP33AE3 delivers double the surge current (56.2 A vs. 28.2 A) and full 3000 W immunity - critical for infrastructure-grade lightning protection where single-event failure is unacceptable.

Availability

MADA3KP33AE3 is available at Aetrix Electronics and suitable for telecom power feeds, industrial PLC I/O ports, and automotive body control modules requiring stable component supply and certified surge immunity.

Supply support for MADA3KP33AE3 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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.

The MDA3KP series was engineered for mission-critical surge protection in harsh environments - emphasizing lot traceability, MIL-PRF-19500 screening options, and validated 3000 W transient handling under IEC61000-4-5 test conditions.

FAQ

What is the clamping voltage of MADA3KP33AE3 at its rated peak pulse current?

The MADA3KP33AE3 has a maximum clamping voltage (VC) of 53.3 V at 56.2 A peak pulse current (IPP) under 10/1000 µs waveform conditions. This value is measured per standard test methods and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. Designers must verify that 53.3 V remains safely below the absolute maximum voltage rating of downstream components. The MADA3KP33AE3 achieves this clamping performance while maintaining low leakage (<2 µA) at its 33 V standoff voltage.

Is MADA3KP33AE3 RoHS-compliant and what does the 'e3' suffix indicate?

Yes, MADA3KP33AE3 is RoHS-compliant, as confirmed by the 'e3' suffix in its part number. Per Microsemi's nomenclature, 'e3' denotes matte-tin termination plating meeting EU RoHS Directive 2011/65/EU requirements. The device uses lead-free terminations qualified to IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, eliminating dry-pack requirements. This makes MADA3KP33AE3 suitable for lead-free reflow assembly processes without compromising surge robustness or long-term solder joint integrity.

How many protected channels does MADA3KP33AE3 provide and how are they configured?

MADA3KP33AE3 provides two independent unidirectional TVS channels in a single 3-pin TO-277A package: Pin 1 is the cathode of Channel 1, Pin 2 is the shared anode (ground), and Pin 3 is the cathode of Channel 2. This dual-cathode configuration allows simultaneous protection of two separate DC lines - such as RS-485 A/B lines or redundant power rails - with matched electrical characteristics. The MADA3KP33AE3 does not support bidirectional operation; for AC or bipolar signal protection, a 'C' suffix variant (e.g., MADA3KP33CE3) would be required.

What standards does MADA3KP33AE3 meet for lightning surge immunity?

MADA3KP33AE3 meets IEC61000-4-5 for secondary lightning surge immunity across multiple source impedances: it supports Class 1–4 with 42 Ω source (full 3000 W rating), Class 1–3 with 12 Ω source, and Class 2 with 2 Ω source. These classifications validate its use in telecom central offices, industrial substations, and outdoor base stations. The MADA3KP33AE3 also satisfies ESD immunity per IEC61000-4-2 (±8 kV contact) and EFT immunity per IEC61000-4-4 (4 kV burst), verified by sub-100 ps response time and full-lot surge testing.

Can MADA3KP33AE3 replace older Microsemi TVS arrays like MDA3KP33A without layout changes?

Yes, MADA3KP33AE3 is a direct replacement for MDA3KP33A with identical TO-277A package dimensions, pinout, and electrical specifications - including 33 V VWM, 36.7–40.6 V V(BR), and 53.3 V VC. The 'A' prefix change reflects updated Microchip branding post-acquisition, while 'e3' confirms RoHS compliance previously optional on legacy MDA3KP33A. No PCB redesign or footprint modification is needed; existing layouts and assembly processes remain fully compatible with MADA3KP33AE3.