Microchip Technology MDA3KP33CAE3

Overview

MDA3KP33CAE3 from Microsemi is a bidirectional 3000 W transient voltage suppressor (TVS) array in a surface-mount DO-214AB package, featuring 33 V standoff voltage (VWM), 36.7–40.6 V breakdown voltage (V(BR)), 53.3 V clamping voltage at 56.2 A peak pulse current, and <5 ns response time. It delivers secondary lightning protection per IEC61000-4-5 with 12 Ω and 2 Ω source impedances and ESD/EFT suppression per IEC61000-4-2/4-4 in industrial power interfaces.

For engineers reviewing the MDA3KP33CAE3 datasheet, MDA3KP33CAE3 pinout, MDA3KP33CAE3 application, or MDA3KP33CAE3 equivalent, key selection criteria include bidirectional polarity, 33 V working voltage compatibility with 24 V nominal systems, 53.3 V clamping headroom for downstream ICs, and MIL-PRF-19500 upscreening eligibility for high-reliability deployments.

Technical Context

This TVS array uses silicon avalanche diode technology to clamp transient overvoltages across two terminals without polarity dependence. Its bidirectional construction enables symmetric surge suppression on AC-coupled or floating signal/power lines, and its 10/1000 μs waveform rating of 3000 W supports high-energy transients from inductive switching or lightning-induced surges.

The device operates across –55 °C to +150 °C junction temperature, with moisture sensitivity level 1 (no dry pack required), RoHS-compliant matte-tin plating, and traceable wafer/assembly lot control. Standby leakage remains ≤2 μA at 33 V, ensuring minimal impact on low-power monitoring circuits.

Key Specifications

Pinout & Package

MDA3KP33CAE3 is housed in a DO-214AB (SMC) plastic package with void-free UL94V-0 epoxy body, tin-lead or matte-tin terminations, and polarity marked by a dot indicating Pin 1 (cathode for unidirectional variants; symmetric for bidirectional). Weight ≈5 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ33CA and 1.5KE33CA, MDA3KP33CAE3 provides 2× and 2× higher peak pulse power respectively, tighter clamping (53.3 V vs. 57.5 V), and surface-mount compatibility-making it optimal for new industrial and automotive designs demanding Class 4 surge immunity and high-volume assembly.

Availability

MDA3KP33CAE3 is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive body control module power rails, and RS-485 data line protection requiring stable component supply across extended product lifecycles.

Supply support for MDA3KP33CAE3 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 RF solutions for aerospace, defense, and industrial markets.

The MDA3KP series was designed specifically for high-energy transient suppression in mission-critical systems where MIL-PRF-19500 screening, wide temperature operation, and repeatable 3000 W surge performance are mandatory.

FAQ

What does the 'C' suffix in MDA3KP33CAE3 indicate?

The 'C' suffix in MDA3KP33CAE3 denotes bidirectional polarity, meaning the device provides symmetrical transient clamping in both voltage polarities. This allows use on AC-coupled lines or floating differential buses without regard to signal direction. The MDA3KP33CAE3 achieves this via back-to-back avalanche diode configuration, unlike unidirectional variants (e.g., MDA3KP33AE3) that clamp only in reverse bias.

Is MDA3KP33CAE3 RoHS-compliant and what does the 'e3' marking mean?

Yes, MDA3KP33CAE3 is RoHS-compliant, as confirmed by the 'e3' suffix in its full part number. Per Microsemi documentation, 'e3' indicates matte-tin plating meeting EU Directive 2011/65/EU and JEDEC J-STD-020B Level 1 moisture sensitivity-requiring no dry-pack or baking prior to reflow soldering. This simplifies manufacturing and ensures environmental compliance without performance trade-offs.

How does MDA3KP33CAE3 perform under IEC61000-4-5 Class 4 testing conditions?

MDA3KP33CAE3 meets IEC61000-4-5 Class 4 requirements when tested with 12 Ω source impedance, delivering full 3000 W surge capability at 10/1000 μs. Its 53.3 V clamping voltage at 56.2 A peak current ensures protected circuitry remains below safe thresholds. For 2 Ω source impedance, it supports Class 2 only-data sheet specifies Class 4 validity strictly for 12 Ω and 42 Ω configurations.

Can MDA3KP33CAE3 replace MDA3KP33AE3 in an existing design?

No, MDA3KP33CAE3 cannot directly replace MDA3KP33AE3 without circuit review. While both share VWM (33 V) and package (DO-214AB), MDA3KP33AE3 is unidirectional and must be oriented with cathode toward the protected rail. MDA3KP33CAE3 is bidirectional and polarity-insensitive-but its symmetrical IV curve alters standby leakage behavior and may affect bias-sensitive circuits like precision references. Layout and schematic validation are required.

What is the maximum allowable junction temperature for continuous operation of MDA3KP33CAE3?

The maximum continuous junction temperature for MDA3KP33CAE3 is +150 °C, with minimum storage temperature of –55 °C. This rating applies under steady-state thermal conditions with adequate PCB copper area (≥1 in² per pad recommended) and ambient airflow. Derating begins above +25 °C per Figure 3 in the datasheet: at +100 °C ambient, peak pulse power drops to ~60% of 3000 W.