My Inquiry
My Account
Renesas NNCD3.9D-T1-A
- Part No.:
- NNCD3.9D-T1-A
- Manufacturer:
- Renesas
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
NNCD3.9D-T1-A.pdf
- Description:
- NNCD3.9D-T1-A - ELECTROSTATIC DI
- Quantity:
- Payment:
- Shipping:
Inventory:21,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NNCD3.9D-T1-A from Renesas Electronics is a 2-pin electrostatic discharge (ESD) noise clipping diode in Super Mini Mold package, rated for 200 mW power dissipation, with 3.7–4.1 V breakdown voltage, ≤130 Ω dynamic impedance at 5 mA, and 200 pF capacitance at 1.0 V reverse bias. It delivers ≥30 kV ESD endurance per IEC1000-4-2 and is used for external interface circuit protection in consumer electronics peripherals.
For engineers reviewing the NNCD3.9D-T1-A datasheet, NNCD3.9D-T1-A pinout, NNCD3.9D-T1-A application, or NNCD3.9D-T1-A equivalent, this page provides verified electrical parameters, package dimensions, real-world interface protection use cases, and validated alternative parts for ESD-sensitive signal lines.
Technical Context
This diode operates as a bidirectional voltage-clamping device optimized for transient suppression on low-voltage data and control lines. Its low dynamic impedance (≤130 Ω) ensures rapid clamping response during ESD events, while its 200 pF junction capacitance minimizes signal distortion on interfaces up to ~10 MHz.
The device is designed for single-pulse surge handling up to 85 W (10 µs pulse width), with a maximum junction temperature of 150 °C and storage range from –55 °C to +150 °C. It is not radiation-hardened and carries Standard quality grade per Renesas classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 3.7–4.1 V (clamps transients above this threshold without forward conduction) |
| Dynamic Impedance | ≤130 Ω at 5 mA (ensures low-voltage overshoot during fast ESD pulses) |
| Junction Capacitance | 200 pF at 1.0 V (compatible with USB 1.1, I²C, and low-speed serial interfaces) |
| ESD Withstand | ≥30 kV per IEC1000-4-2 Contact Discharge (meets industrial-grade interface immunity) |
| Power Dissipation | 200 mW (supports continuous operation in ambient up to 75 °C on standard PCB) |
| Surge Reverse Power | 85 W (10 µs pulse, non-repetitive; defines single-event robustness limit) |
| Package | 2-pin Super Mini Mold (1.25 × 0.9 mm footprint, 0.3 mm height; enables high-density layout) |
Pinout & Package
Package: 2-pin Super Mini Mold (SMD), cathode-indicated via marking on top surface. Dimensions: 1.25 ± 0.1 mm × 0.9 ± 0.1 mm × 0.3 ± 0.05 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side clamp path | Connected to protected signal line; conducts during negative transients |
| Cathode | Forward current exit / high-side clamp path | Connected to VCC or ground reference; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects both positive and negative ESD transients without external polarity configuration |
| Low capacitance | 200 pF enables use on 1–10 MHz digital signals without measurable rise-time degradation |
| High ESD endurance | Rated ≥30 kV contact discharge per IEC1000-4-2 - exceeds typical system-level requirements |
| Compact SMD package | 1.25 × 0.9 mm footprint allows placement directly at connector pins or IC pads |
Applications
| USB 1.1 Peripheral Port | I²C Bus Lines |
|---|---|
Use Scenario: Protecting D+ and D− lines of a USB printer or keyboard against user-hand ESD events during cable insertion. IC Role / Device Role / Timing Role: Passive voltage clamp placed between signal line and ground, activated only during >3.7 V transients. Use Value: Prevents latch-up or damage to USB transceiver ICs by limiting peak voltage to <5 V during 30 kV contact discharge. | Use Scenario: Shielding SDA/SCL lines in embedded microcontroller systems where pull-up resistors connect to 3.3 V rails. IC Role / Device Role / Timing Role: Low-capacitance shunt element that remains invisible during normal 0–3.3 V signaling but clamps spikes above 4.1 V. Use Value: Maintains I²C timing integrity (no added RC delay) while blocking ESD-induced bus lockup or false ACKs. |
| Audio Line Input Jack | RS-232 Interface Pins |
Use Scenario: Guarding analog audio input jacks on consumer AV receivers exposed to charged-cable discharge. IC Role / Device Role / Timing Role: Symmetrical clipping diode across differential input pair, referenced to common-mode voltage. Use Value: Limits transient overvoltage to ±4.1 V, preventing op-amp input stage saturation or internal ESD diode failure. | Use Scenario: Protecting RS-232 driver/receiver ICs on industrial control panels subject to field technician ESD. IC Role / Device Role / Timing Role: Clamp placed between TX/RX lines and local ground, operating outside normal ±3–±15 V signaling range. Use Value: Absorbs >30 kV surges without altering DC bias or slew rate of RS-232 signals due to low dynamic impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NUP4105MR6T1G | Quad-channel, 5.5 V breakdown, 30 pF @ 0 V, SOT-563 package | Designed for multi-line protection; higher integration but larger footprint | Choose when protecting ≥2 adjacent lines with shared ground and space permits SOT-563 |
| Vishay ESDE0402-3.3 | Single-channel, 3.3 V breakdown, 15 pF @ 0 V, 0402 package | Lower capacitance and tighter voltage tolerance, but lower 15 kV IEC1000-4-2 rating | Prefer for high-speed interfaces (>25 MHz) where sub-20 pF is mandatory and 15 kV suffices |
Compared with NNCD3.9D-T1-A, the NUP4105MR6T1G offers multi-line integration at the cost of layout flexibility, while the ESDE0402-3.3 trades ESD robustness for ultra-low capacitance - making NNCD3.9D-T1-A optimal for balanced 30 kV/200 pF protection in space-constrained consumer interfaces.
Availability
NNCD3.9D-T1-A is available at Aetrix Electronics and suitable for USB peripheral ports, I²C bus nodes, audio input jacks, and RS-232 interface circuits requiring stable component supply and guaranteed ESD immunity compliance.
Supply support for NNCD3.9D-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.
NNCD3.9D-T1-A belongs to Renesas' legacy ESD noise clipping diode family, engineered specifically for cost-effective, board-level IEC1000-4-2 compliance in consumer and office equipment interfaces.
FAQ
What is the maximum operating temperature for NNCD3.9D-T1-A?
NNCD3.9D-T1-A has a maximum junction temperature 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 full 200 mW operation is limited to ≤75 °C ambient on standard FR-4 PCB per Figure 1 in the datasheet. Thermal design must account for local heating near connectors.
Does NNCD3.9D-T1-A meet IEC1000-4-2 Level 4 ESD requirements?
Yes, NNCD3.9D-T1-A is rated for ≥30 kV contact discharge per IEC1000-4-2, exceeding Level 4 (8 kV contact / 15 kV air) by wide margin. This rating was verified under standardized test conditions (150 pF capacitor, 330 Ω series resistor) and applies to single-pulse events - repetitive ESD requires system-level validation beyond the diode's specification.
Can NNCD3.9D-T1-A be used on 5 V logic lines?
Yes, NNCD3.9D-T1-A can protect 5 V logic lines, but its 3.7–4.1 V breakdown means it begins conducting near the logic high threshold. For robust 5 V rail protection, verify that downstream ICs tolerate brief clamping to ~4.5 V and confirm no steady-state leakage occurs at 5 V - the datasheet specifies ≤10 µA reverse leakage at 1.0 V, not at 5 V.
Is NNCD3.9D-T1-A RoHS compliant?
Yes, NNCD3.9D-T1-A complies with the EU RoHS Directive. Renesas confirms environmental compliance for this product family in accordance with applicable laws, including restriction of lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE. Full material declarations are available upon request from Renesas sales offices.
What is the cathode identification method on NNCD3.9D-T1-A?
NNCD3.9D-T1-A uses a cathode indication mark - a visible stripe or dot on the top surface of the Super Mini Mold package aligned with the cathode terminal. Per package drawing in the datasheet, the cathode is the terminal nearest the marking, and orientation is confirmed by the 0.19 mm lead pitch asymmetry and 0.11+0.05 mm cathode-side dimension.
NNCD3.9D-T1-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- SC-76, SOD-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 1V (Max)
- Voltage - Breakdown (Min):
- 3.7V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 85W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 200pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-Super Mini Mold
NNCD3.9D-T1-A FAQ
1.How can I place an order for NNCD3.9D-T1-A through Aetrix?
Please submit a Request for Quotation (RFQ) for NNCD3.9D-T1-A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NNCD3.9D-T1-A reliable?
The price and inventory of NNCD3.9D-T1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NNCD3.9D-T1-A is usually 5 days.
3.What payment methods are accepted for NNCD3.9D-T1-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NNCD3.9D-T1-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NNCD3.9D-T1-A?
NNCD3.9D-T1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NNCD3.9D-T1-A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NNCD3.9D-T1-A?
For technical support, including NNCD3.9D-T1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NNCD3.9D-T1-A requirements.
6.How does Aetrix verify that NNCD3.9D-T1-A is sourced from the original manufacturer or authorized distributors?
All NNCD3.9D-T1-A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NNCD3.9D-T1-A meets industry standards.
7.What is the process for return or replacement of NNCD3.9D-T1-A?
All NNCD3.9D-T1-A units undergo pre-shipment inspection (PSI). If there is an issue with NNCD3.9D-T1-A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NNCD3.9D-T1-A part is unused and in its original packaging.
Return procedure for NNCD3.9D-T1-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NNCD3.9D-T1-A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
