Microchip Technology MADA3KP33CA

Overview

MADA3KP33CA from Microsemi is a bidirectional 3000 W transient voltage suppressor (TVS) array designed for high-reliability surge protection in industrial and telecom power rails. It features a 33 V standoff voltage (VWM), 36.7–40.6 V breakdown range (V(BR)), 53.3 V clamping voltage at 56.2 A peak pulse current, and operates from −55 °C to +150 °C. It protects against IEC61000-4-5 secondary lightning (42 Ω, Class 1–4), ESD per IEC61000-4-2, and EFT per IEC61000-4-4.

For engineers reviewing the MADA3KP33CA datasheet, MADA3KP33CA pinout, MADA3KP33CA application, or MADA3KP33CA equivalent, this device is selected for robust overvoltage protection where fast response (<5 ns), high surge capability (3000 W @ 10/1000 µs), and bidirectional polarity are required in DC power distribution, base station front-ends, and railway signaling interfaces.

Technical Context

The MADA3KP33CA is a surface-mount, void-free epoxy-packaged TVS array with cathode-defined odd-numbered pins and RoHS-compliant matte-tin plating. Its bidirectional construction enables symmetrical clamping on AC or floating DC lines without polarity concerns.

It delivers 53.3 V clamping at 56.2 A (10/1000 µs waveform), with <5 ns response time and full surge testing per lot. Standby leakage is ≤2 µA at 33 V, and it supports derating down to 0% power at +150 °C per Figure 3.

Key Specifications

Pinout & Package

Package: Surface-mount DO-214AB (SMC) molded epoxy case, UL94V-0 rated, ~5 g weight, dimensions per Page 6 (A=21.03–22.05 mm, B=6.86–7.87 mm, C=8.64–9.65 mm). Pin 1 marked by dot; odd pins are cathodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ33CA and 1.5KE33CA, the MADA3KP33CA uniquely combines 3000 W SMT capability, bidirectional symmetry, and MIL-qualified screening readiness - making it the only choice for new high-density, high-reliability telecom and rail deployments requiring Class 4 lightning immunity.

Availability

MADA3KP33CA is available at Aetrix Electronics and suitable for telecom power feeds, railway signaling interfaces, and industrial motor drives requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MADA3KP33CA 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 specifically for mission-critical surge protection in infrastructure-grade power and signal interfaces where failure is not an option - emphasizing lot traceability, extended temperature operation, and validated IEC61000-4-5 compliance.

FAQ

What is the clamping voltage of the MADA3KP33CA at its rated peak pulse current?

The MADA3KP33CA has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPP) of 56.2 A under 10/1000 µs waveform conditions. This value is measured across the device terminals during surge testing and represents the highest voltage downstream circuitry will experience during a full-rated transient event. The MADA3KP33CA maintains this clamping performance consistently across its operating temperature range.

Is the MADA3KP33CA unidirectional or bidirectional, and how does that affect circuit placement?

The MADA3KP33CA is a bidirectional TVS array, indicated by the "C" suffix in its part number. This allows it to clamp transients of either polarity symmetrically between Pins 1 and 3, with Pin 2 as the common node. Unlike unidirectional devices, it requires no polarity awareness during PCB layout and is ideal for AC-coupled lines or floating DC busses where voltage reversals may occur - such as telecom -48 V feeds or railway signaling pairs.

Does the MADA3KP33CA meet IEC61000-4-5 Class 4 requirements, and under what source impedance?

Yes, the MADA3KP33CA meets IEC61000-4-5 Class 4 requirements when tested with a 42 Ω source impedance, as confirmed in the Applications/Benefits section of the RF01243 datasheet. It also qualifies for Class 1–3 at 42 Ω, Class 1–3 at 12 Ω, and Class 2 at 2 Ω. Its 3000 W rating and sub-5 ns response make it suitable for the most stringent secondary lightning immunity tests in telecom and rail applications.

What is the maximum standoff voltage (VWM) and why is it critical for selecting the MADA3KP33CA?

The MADA3KP33CA has a maximum reverse standoff voltage (VWM) of 33 V, meaning it remains non-conductive up to this DC or peak AC voltage under normal operation. Selecting a VWM equal to or greater than the protected line's maximum steady-state voltage prevents false triggering and leakage-related power loss. For example, it is correctly applied on a nominal 24 V or 30 V DC rail where peak excursions reach 33 V, ensuring reliable protection without interference during normal function.

Can the MADA3KP33CA be used in high-reliability programs requiring MIL-PRF-19500 screening?

Yes, optional upscreening per MIL-PRF-19500 is available for the MADA3KP33CA, including wafer and assembly lot traceability, 3σ screening on standby current (ID), and conformance inspections. This makes it suitable for aerospace, defense, and critical infrastructure programs where component pedigree, burn-in, and parametric stability are mandated - unlike commercial-grade TVS diodes lacking such qualification pathways.