0402ESDA-MLP1 - 35V 0.05pF Polymer ESD Suppressor | Eaton
MPN: 0402ESDA-MLP1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.05 | $0.05 |
| 10 | $0.05 | $0.50 |
| 100 | $0.048 | $4.80 |
| 500 | $0.045 | $22.50 |
| 1,000 | $0.042 | $42.00 |
0402ESDA-MLP1 Overview
An ESD suppressor is a circuit-protection device that clamps transient electrostatic voltages before they reach sensitive ICs. Within the protection hierarchy, ESD suppressors sit downstream of surge arrestors and upstream of generic TVS diodes in speed capability: polymer devices switch in picoseconds, making them the fastest category of clamp available for data-line protection.
The defining feature of the 0402ESDA-MLP1 is its 0.05 pF typical line capacitance. Silicon TVS diodes in comparable packages typically present several tenths of a picofarad to several picofarads, which causes signal reflections and eye-pattern closure on multi-gigabit links. The polymer construction keeps insertion loss negligible for USB 3.x, HDMI, and Gigabit Ethernet speeds.
Electrically, the device is bidirectional and rated for a 35V standoff per distributor listings (Arrow lists 30V bidirectional breakdown rating), so it can protect lines carrying up to 35V without conducting in normal operation. The PolySurg polymer material conducts only when an ESD event triggers the low-voltage polymer transition, diverting the transient energy to ground in a two-terminal, single-circuit configuration.
Typical applications include USB port protection, HDMI and DisplayPort lines, Gigabit and 10G Ethernet, antenna and RF front-end protection, and high-speed backplane or smartphone antenna lines, all places where even 1 pF of added capacitance would distort data signals.
Designers should place the suppressor directly at the connector with a short, low-inductance ground return; inductance in the ground path dominates the residual clamping voltage during fast ESD edges. It is a passive two-terminal device requiring no supply.
This page adds value beyond the datasheet: it consolidates 19-distributor pricing comparison, same-package alternatives, placement design guidance, and compliance status in one AI-citable reference. Pricing shown is as of 2026-09-14.
Drop-in alternatives for 0402ESDA-MLP1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with 0402ESDA-MLP1 (same form factor and footprint) β differing in Package, Technology.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
0402ESDA-MLPT
β Drop-Inπ Reference alternative (not in catalog)
0402ESDA-05N
β Drop-Inβ In Stock
$0.0107 / Unit
View Datasheet β0402ESDA-MLP1-35H
β Drop-Inπ Reference alternative (not in catalog)
0402ESDA-MLP1 Specifications
| Product Type | Polymer TVS ESD Suppressor (PolySurg) |
| Number of Protected Circuits | 1 |
| Configuration | Bidirectional, 2-terminal |
| Working / Standoff Voltage | 35 V |
| Reverse Standoff Voltage (Arrow listing) | 30 V |
| Typical Capacitance | 0.05 pF |
| Technology | Polymer (PolySurg) |
| Package | 0402 (1006 Metric), 2-pin surface mount |
| Mounting Type | Surface Mount |
| Reflow | IR reflow compatible (per Eaton datasheet) |
| Applications | High-speed data line ESD protection |
| Packaging | Tape & Reel (10,000 pcs per reel per Eaton PCN) |
| Series | 0402ESDA-MLP (Eaton, supersedes Cooper Bussmann MLP1) |
0402ESDA-MLP1 0402 (1006 metric), 2-pin surface mount Pin Configuration Guide
Pin configuration for 0402ESDA-MLP1 (0402 (1006 metric), 2-pin surface mount package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for 0402ESDA-MLP1.
Refer to the datasheet for full pin configuration.
Typical Applications
0402ESDA-MLP1 is suitable for 6 applications: USB 3.x Port Protection, HDMI and DisplayPort Line Protection, Gigabit and 10G Ethernet Ports, RF Antenna and Front-End Protection, Smartphones, Tablets and Wearables, Industrial I/O and Backplane Ports.
USB 3.x Port Protection
The 0402ESDA-MLP1 fits USB 3.x port protection because SuperSpeed differential pairs tolerate almost no added loading: at 5 Gbps, even a 0.5 pF silicon TVS diode causes noticeable edge degradation and eye closure, while the MLP1's 0.05 pF typical capacitance keeps insertion loss effectively negligible. In the circuit, the suppressor sits immediately after the USB receptacle with one terminal on the differential line and the other on a short ground return with dual vias, clamping the IEC 61000-4-2-class contact-discharge strikes that occur when users touch the connector shell or plug. The 35V standoff comfortably exceeds USB VBUS-adjacent line bias, and the bidirectional construction handles both polarity transients on AC-coupled pairs. Placement inductance, not the device itself, dominates residual clamp voltage, so routing discipline matters more than component selection at these edge rates.
Recommended
HDMI and DisplayPort Line Protection
HDMI 2.0 and DisplayPort lanes run at 6-12 Gbps per pair, a speed range where the MLP1's 0.05 pF capacitance is effectively mandatory; typical 0402 silicon TVS diodes at 0.3-0.5 pF produce inter-symbol interference and fail the sink's eye-mask testing at TMDS rates. Eaton's PolySurg positioning explicitly targets this class of high-speed data circuit that must be protected 'without distorting data signals.' Implementation places one bidirectional suppressor per hot-susceptible line (the connector-facing pins most exposed to user contact), with the 0402 body directly at the receptacle pads and a sub-millimeter ground path. The 35V standoff covers hot-plug detect and CEC/ARC lines carrying DC bias, so a single part number protects control lines and high-speed pairs alike, simplifying the protection BOM and keeping reflow assembly to a single additional passively placed component per line.
Recommended
Gigabit and 10G Ethernet Ports
Ethernet magnics isolate most surge energy, but the connector-side lines of RJ45 jacks, PoE auxiliary pins, and LED/control pins still see ESD from cable handling, and the PHY-side lines after the transformer need low-capacitance clamps. The MLP1's 0.05 pF typical capacitance preserves 1000BASE-T and faster return-loss margins where even picofarad-scale loading violates the transformer and PHY specification budget. With a 35V standoff, the suppressor tolerates PoE-biased lines without leakage, and the bidirectional polymer conduction handles positive and negative ESD pulses symmetrically. Boards typically place one 0402ESDA-MLP1 per exposed pin at the RJ45 connector, then rely on the magnetics plus a higher-energy silicon TVS for the differential surge requirement; the polymer device absorbs the fast, low-energy ESD front edge that arrives before the silicon TVS turns on.
Recommended
RF Antenna and Front-End Protection
Antenna feed points are among the most ESD-exposed nodes in any wireless product, yet they are also the most capacitance-sensitive: at 2.4 GHz and 5 GHz, every 0.1 pF shunt capacitance shifts the antenna match and steals transmit efficiency. The 0402ESDA-MLP1's 0.05 pF typical capacitance has minimal effect on impedance at these frequencies, which is precisely why polymer rather than silicon technology is specified for front-end protection. The 35V bidirectional standoff accommodates DC-biased antenna lines (active antennas, LNA bias feeds) without conduction, and the 0402 footprint places cleanly at the antenna feed with a short ground return. The part is passive and adds no distortion or intermodulation products the way a forward-biased junction could, preserving receiver sensitivity and transmitter ACLR performance in cellular, Wi-Fi, and GNSS front ends.
Recommended
Smartphones, Tablets and Wearables
Portable electronics concentrate many exposed connectors - USB-C, SIM, audio jack, button lines - into a small area with dense, capacitance-critical routing, making the 0402ESDA-MLP1's combination of 0.05 pF capacitance and 0402 (1006 metric) size a natural fit. Its tiny footprint allows one suppressor per exposed pin without congesting the board, and the polymer technology protects high-speed MIPI and USB lines without data distortion. The 35V standoff covers accessory-detect lines and biased pins, while unit cost near $0.05 (LCSC, as of 2026-09-14) keeps the protection BOM affordable even when ten or more lines are protected per device. Tape-and-reel packaging at 10,000 pieces per reel (per Eaton PCN) suits high-volume pick-and-place production, and the passive two-terminal construction adds no quiescent drain on the battery.
Recommended
Industrial I/O and Backplane Ports
Industrial equipment exposes screw-terminal I/O, fieldbus ports, and backplane connectors to ESD from operator contact and charged cables. Where the protected signals are slow digital or analog lines biased up to 35V, the 0402ESDA-MLP1's wide standoff and bidirectional polymer clamp provide robust ESD protection without the leakage current a lower-voltage suppressor would exhibit. Its 0402 body withstands the recommended IR reflow profile published in the Eaton datasheet, standard for industrial assembly. In backplanes, the ultra-low 0.05 pF capacitance matters for high-speed serial fabric lines where protection must not consume the AC-coupling or equalization budget. Designers typically combine one polymer suppressor per exposed line at the connector with panel-level surge devices upstream, so the MLP1 handles the nanosecond-scale ESD edge while larger TVS or gas-dis devices handle lightning-induced surge energy.
Recommended
Recommended Products Summary
Engineering reference data for 0402ESDA-MLP1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 0402ESDA-MLPT | 0402ESDA-05N | 0402ESDA-MLP1-35H |
|---|---|---|---|---|
| Package | 0402 (1006 Metric), 2-pin | 0402 (1006 Metric) - same | 0402 (1006 Metric) - same | 0402 (1006 Metric) - same |
| Brand | Eaton | Eaton | Eaton | Eaton |
| Technology | Polymer (PolySurg) | Polymer (PolySurg) | Polymer (PolySurg) | Polymer (PolySurg) |
| Working / Standoff Voltage | 35 V | 35 V | 5 V class | 35 V |
| Configuration | Bidirectional, 1 circuit | Bidirectional, 1 circuit | Bidirectional, 1 circuit | Bidirectional, 1 circuit |
| High-Speed Suitability | USB 3.x / HDMI / RF capable | USB 3.x / HDMI / RF capable | Low-voltage lines only (5 V standoff) | High-speed capable |
Key Differentiators
- Ultra-low 0.05 pF capacitance for multi-gigabit lines (vs 0402ESDA-05N)
- Direct replacement lineage for the discontinued 0402ESDA-MLP8 (vs 0402ESDA-MLP8)
- Lowest-cost protection element on the BOM (vs 0402ESDA-MLP1-35H)
Design Notes
Place the 0402ESDA-MLP1 as the first component after the connector on every protected line, with the ground terminal tied to a solid plane through at least two vias. ESD currents reach several amperes within a nanosecond, so ground-return inductance - not the suppressor's own clamping voltage - usually determines the residual stress at the protected IC. Keep the line-side pad directly in the signal trace with no stub, and keep the total loop from connector to suppressor to ground under a few millimeters.
Do not substitute a silicon TVS diode for the MLP1 on multi-gigabit lines without re-checking eye diagrams: silicon devices in 0402 packages typically add 0.3 pF or more versus the MLP1's 0.05 pF, enough to fail HDMI and USB 3.x compliance. Conversely, do not rely on the polymer device alone for high-energy surge (lightning, cable discharge) - pair it with a downstream silicon TVS sized for surge energy, letting the polymer clamp the fast ESD front edge.
The 0402ESDA-MLP1 is a passive two-terminal clamp with no supply pin and no quiescent current, so no power budget entry is needed for normal operation. The only thermal consideration is the transient ESD event itself, which the polymer body is designed to absorb. Ensure the pad layout follows the Eaton datasheet 0402 land pattern and the recommended IR reflow profile so that terminations remain robust over the device's service life.
Compliance Information
Compliance certificates were not included in the retrieved distributor data. The datasheet's recommended IR reflow profile is written for standard surface-mount assembly; confirm RoHS/REACH/lead-free status via the Eaton product page or distributor certificate of compliance before design release.
