Renesas NNCD5.1D-T1-A

Overview

NNCD5.1D-T1-A from Renesas Electronics is a 2-pin ESD noise clipping diode in Super Mini Mold package, rated for 200 mW power dissipation, with 4.82–5.39 V breakdown voltage, ≤160 pF capacitance at 1 MHz, and 30 kV IEC 1000-4-2 ESD endurance-designed for external interface circuit protection in consumer electronics and industrial peripherals.

For engineers reviewing the NNCD5.1D-T1-A datasheet, NNCD5.1D-T1-A pinout, NNCD5.1D-T1-A application, or NNCD5.1D-T1-A equivalent, key selection criteria include clamping voltage stability under 5 mA test current, dynamic impedance ≤130 Ω, low leakage (≤5 µA at 1.5 V), and compatibility with high-speed data lines requiring <160 pF parasitic capacitance.

Technical Context

This device operates as a bidirectional transient voltage suppressor optimized for electrostatic discharge immunity per IEC 61000-4-2 Level 4 (±30 kV contact). It functions by avalanche breakdown below 5.39 V to clamp fast-rising ESD pulses while maintaining low dynamic impedance (≤130 Ω) during conduction.

Its 2-pin Super Mini Mold package enables surface-mount integration on USB, audio, and parallel interface traces. The diode exhibits 160 pF junction capacitance at 0 V bias and 1 MHz, ensuring minimal signal distortion on lines up to ~10 Mbps without added series resistance.

Key Specifications

Pinout & Package

Package: 2-pin Super Mini Mold (SMD), dimensions 2.5 ± 0.15 mm × 1.25 ± 0.1 mm × 0.3 ± 0.05 mm, cathode marked.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with NNCD5.1D-T1-A, the NUP4105MR6T1G offers multi-line integration at the cost of layout flexibility, while the ESD9X5.0ST5G trades higher manufacturing cost for superior high-frequency performance and miniaturization-making NNCD5.1D-T1-A optimal for cost-sensitive, medium-speed interface protection with proven thermal margin.

Availability

NNCD5.1D-T1-A is available at Aetrix Electronics and suitable for USB peripheral ports, industrial parallel interfaces, legacy RS-232 transceivers, and analog audio jacks requiring stable component supply and long-term obsolescence management.

Supply support for NNCD5.1D-T1-A 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.

The NNCD series was developed by Renesas (formerly NEC) specifically for cost-effective, high-reliability ESD protection of external I/O interfaces in standard-grade consumer and industrial equipment.

FAQ

What is the maximum operating temperature for NNCD5.1D-T1-A?

NNCD5.1D-T1-A has a maximum junction temperature (T_j) of 150 °C and a storage temperature range of –55 °C to +150 °C. Its derated power dissipation falls to zero at 150 °C ambient, per the thermal curve in Figure 1 of the datasheet. For reliable long-term operation, keep PCB copper area and airflow sufficient to maintain T_j < 125 °C under worst-case ESD stress. NNCD5.1D-T1-A must not be operated beyond these limits.

Does NNCD5.1D-T1-A support bidirectional ESD protection?

Yes, NNCD5.1D-T1-A is a bidirectional ESD suppression diode, capable of clamping both positive and negative transients relative to its reference node. Its symmetrical breakdown behavior (4.82–5.39 V in either polarity) enables use on AC-coupled or floating signal lines without polarity concerns. This makes NNCD5.1D-T1-A suitable for USB, audio, and other balanced or unidirectional interfaces where transient polarity is unpredictable.

What is the typical junction capacitance of NNCD5.1D-T1-A at 0 V bias?

The typical junction capacitance of NNCD5.1D-T1-A is 160 pF measured at 1 MHz and 0 V reverse bias, as specified in the Electrical Characteristics table. This value remains stable across process variation and temperature, enabling predictable signal integrity impact on low-speed digital and analog lines. NNCD5.1D-T1-A's 160 pF is confirmed under standardized test conditions (f = 1 MHz, V_R = 0 V) and applies directly to layout modeling.

Can NNCD5.1D-T1-A replace older NEC ESD diodes like NNCD5.1D without design changes?

Yes, NNCD5.1D-T1-A is the tape-and-reel packaging variant of the original NNCD5.1D, sharing identical electrical specifications, package dimensions, pinout, and thermal characteristics. The "-T1-A" suffix denotes taping for automated assembly; no schematic or layout modifications are required when upgrading from NNCD5.1D to NNCD5.1D-T1-A. NNCD5.1D-T1-A maintains full functional and mechanical equivalence with the base NNCD5.1D part.

Is NNCD5.1D-T1-A compliant with RoHS and lead-free soldering standards?

NNCD5.1D-T1-A complies with the EU RoHS Directive and is manufactured using lead-free terminations compatible with standard reflow profiles (J-STD-020). Renesas confirms environmental compliance in product change notices and material declarations. As a Standard-grade component, NNCD5.1D-T1-A meets all applicable substance restrictions-including Pb, Cd, Hg, Cr(VI), PBB, and PBDE-and is suitable for green manufacturing programs. NNCD5.1D-T1-A documentation supports full supply chain traceability.