Renesas NNCD3.3D-T1-A

Overview

NNCD3.3D-T1-A from Renesas Electronics is a 3.3 V electrostatic discharge (ESD) noise clipping diode in a 2-pin Super Mini Mold package, rated for 200 mW power dissipation and 30 kV IEC 1000-4-2 ESD immunity. It features a breakdown voltage of 3.10–3.50 V at 5 mA, dynamic impedance ≤130 Ω, and typical capacitance of 220 pF at 1 MHz, used for protecting external interface circuits such as parallel ports and peripheral connectors.

For engineers reviewing the NNCD3.3D-T1-A datasheet, NNCD3.3D-T1-A pinout, NNCD3.3D-T1-A application, or NNCD3.3D-T1-A equivalent, key selection criteria include clamping voltage under ESD stress, junction capacitance for high-speed signal integrity, surge power handling (85 W, 10 µs), thermal limits (Tj = 150 °C), and compatibility with low-voltage I/O interfaces like USB 1.1 or legacy parallel bus lines.

Technical Context

This device operates as a bidirectional transient voltage suppressor optimized for ESD protection on unidirectional or bidirectional signal lines. Its low clamping voltage (≤1.0 V at 20 µA reverse leakage) and fast response enable effective suppression of ±30 kV contact discharge per IEC 1000-4-2 without signal distortion in low-voltage digital interfaces.

The diode uses a planar silicon junction structure with cathode-indicated marking and is characterized for operation across –55 °C to +150 °C storage temperature. It is not radiation-hardened and is designated for Standard quality grade applications including consumer electronics and office equipment.

Key Specifications

Pinout & Package

Package: 2-pin Super Mini Mold (SMD), dimensions 2.5 × 1.25 × 0.9 mm (L × W × H), cathode marked with band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NNCD3.3D-T1-A, NSQA3.3AV6T2G offers superior high-frequency performance but requires requalification for solder paste volume and reflow profile, while SMAJ3.3A provides greater surge margin at the cost of signal integrity and board area-making NNCD3.3D-T1-A optimal for cost-sensitive, medium-speed parallel interface protection.

Availability

NNCD3.3D-T1-A is available at Aetrix Electronics and suitable for parallel port protection, printer interface circuits, legacy peripheral connectors, and CD-ROM drive interfaces requiring stable component supply and long-term obsolescence management.

Supply support for NNCD3.3D-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 NNCD3.3D-T1-A belongs to Renesas' ESD noise clipping diode product line, designed specifically for cost-effective, surface-mount protection of low-voltage digital I/O interfaces against human-body-model electrostatic discharge.

FAQ

What is the maximum operating temperature for NNCD3.3D-T1-A?

The NNCD3.3D-T1-A has a maximum junction temperature (T_j) of 150 °C and a storage temperature range of –55 °C to +150 °C. Its power derating curve shows usable dissipation down to 0 mW at 150 °C ambient, meaning thermal design must ensure junction temperature remains below this limit under worst-case ESD and steady-state conditions. The NNCD3.3D-T1-A is not rated for automotive or extended temperature applications.

Does NNCD3.3D-T1-A meet IEC 61000-4-2 Level 4 requirements?

Yes, the NNCD3.3D-T1-A is specified to withstand ≥30 kV contact discharge per IEC 1000-4-2 (now superseded by IEC 61000-4-2), which exceeds Level 4 (±8 kV contact / ±15 kV air). This rating is verified under non-repetitive 10 µs pulse conditions. The NNCD3.3D-T1-A achieves this via low dynamic impedance (<130 Ω) and controlled junction capacitance (220 pF), enabling reliable clamping without latch-up.

Can NNCD3.3D-T1-A be used on USB 2.0 data lines?

No, the NNCD3.3D-T1-A is not recommended for USB 2.0 differential pairs due to its 220 pF junction capacitance, which would severely degrade signal integrity at 480 Mbps. USB 2.0 requires ESD protectors with ≤3 pF capacitance per line. While the NNCD3.3D-T1-A functions electrically as a bidirectional clamp, its capacitance makes it suitable only for lower-speed interfaces like parallel ports or legacy IDE buses-not high-speed serial links.

What is the cathode marking convention for NNCD3.3D-T1-A?

The NNCD3.3D-T1-A uses a visible cathode band on the package body, aligned with Pin 2 per standard diode polarity convention. In the 2-pin Super Mini Mold package, the cathode terminal is the one nearest the marking band, and the anode is the opposite end. This orientation must be observed during PCB layout to ensure correct connection to signal line (anode) and ground (cathode) for proper bidirectional clamping behavior of the NNCD3.3D-T1-A.

Is NNCD3.3D-T1-A RoHS compliant?

Yes, NNCD3.3D-T1-A complies with EU RoHS Directive 2011/65/EU, as confirmed by Renesas Electronics' environmental compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits. RoHS status is maintained across all manufacturing lots, and material declarations are available upon request for the NNCD3.3D-T1-A.