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Renesas NSAD500S-T1-AT
- Part No.:
- NSAD500S-T1-AT
- Manufacturer:
- Renesas
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
NSAD500S-T1-AT.pdf
- Description:
- NSAD500S-T1-AT - ELECTROSTATIC D
- Quantity:
- Payment:
- Shipping:
Inventory:180,000
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Product details
Overview
NSAD500S-T1-AT from Renesas Electronics is a dual-channel electrostatic discharge (ESD) surge absorber in SC-70 package, featuring common-anode configuration, 8 kV IEC 61000-4-2 contact discharge immunity, 3.5 pF typical capacitance, and 5.3 V minimum breakover voltage - designed for high-speed data line protection in USB2.0 and IEEE1394 interfaces.
For engineers reviewing the NSAD500S-T1-AT datasheet, NSAD500S-T1-AT pinout, NSAD500S-T1-AT application, or NSAD500S-T1-AT equivalent, key selection criteria include low-capacitance ESD clamping performance, dual-cathode common-anode topology, SC-70 footprint compatibility, and compliance with IEC 61000-4-2 Level 4 ESD immunity requirements.
Technical Context
The NSAD500S-T1-AT implements a silicon avalanche diode structure optimized for fast transient suppression on bidirectional signal lines. Its dual-element common-anode layout enables symmetrical clamping of both polarities relative to the shared anode node, supporting unidirectional or differential interface protection without external biasing.
It operates within a 25°C ambient temperature range, sustains 2 W peak surge power (t = 10 µs), and maintains junction temperature below 150°C under rated conditions. The device exhibits forward breakover voltage of 10 V typ. and reverse leakage current ≤0.1 µA at 3 V, ensuring minimal signal loading on high-speed links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Immunity | 8 kV contact discharge per IEC 61000-4-2 - ensures robust protection against human-body-model ESD events on exposed ports. |
| Capacitance | 3.5 pF typical at 1 MHz, 0 V - preserves signal integrity up to 500 Mbps without measurable insertion loss or timing skew. |
| Breakover Voltage | 5.3 V min. (A–K1/K2) - triggers clamping before damage threshold of downstream 3.3 V or 5 V transceivers. |
| Surge Power | 2 W peak (10 µs pulse) - handles single-event transients without thermal runaway or parametric shift. |
| Package | SC-70 (SOT-323) - 2.1 × 1.25 mm footprint supports high-density routing and automated SMT assembly. |
| Leakage Current | ≤0.1 µA at 3 V reverse - prevents DC loading or bias drift in precision analog or high-impedance data lines. |
Pinout & Package
NSAD500S-T1-AT is housed in a 3-pin SC-70 (SOT-323) plastic surface-mount package with gull-wing leads. Pin 1 = Cathode 1 (K1), Pin 2 = Cathode 2 (K2), Pin 3 = Common Anode (A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode 1 | Clamps positive transients on first protected line; connects to signal trace requiring ESD protection. |
| 2 (K2) | Cathode 2 | Clamps positive transients on second protected line; enables dual-line protection from single device. |
| 3 (A) | Common Anode | Reference node tied to system ground or local shield; completes clamping path for both cathodes. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel common-anode topology | Enables compact protection of two independent signal lines (e.g., USB D+/D−) using one SC-70 footprint. |
| Ultra-low 3.5 pF capacitance | Minimizes signal distortion and reflection on 480 Mbps USB2.0 differential pairs without equalization. |
| 8 kV IEC 61000-4-2 contact rating | Meets industrial and consumer equipment ESD immunity requirements without additional TVS staging. |
| 150 mW steady-state power dissipation | Supports continuous operation in ambient temperatures up to +85°C with standard PCB copper area. |
Applications
| USB2.0 Interface Protection | IEEE1394 (FireWire) Port Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of a host-side USB2.0 port exposed to user-accessible connectors. IC Role / Device Role / Timing Role: Bidirectional ESD clamp placed immediately adjacent to connector, referenced to chassis ground. Use Value: Prevents latch-up or oxide damage in USB transceivers during handling while maintaining <0.1 dB insertion loss at 240 MHz. | Use Scenario: Shielding FireWire 400/800 PHY pins against ESD events in digital audio/video workstations. IC Role / Device Role / Timing Role: Dual-line transient suppressor on TPB/TPA and TMB/TMA differential pairs. Use Value: Maintains 100–400 Mbps signal fidelity with <1 ps jitter contribution due to sub-4 pF loading. |
| 100BASE-TX Ethernet PHY Protection | High-Speed Industrial Serial Interface |
Use Scenario: Safeguarding MDI pins of Ethernet PHY ICs in industrial controllers with exposed RJ-45 jacks. IC Role / Device Role / Timing Role: Common-anode clamp on TX+/TX− and RX+/RX− pairs, grounded via short trace to PHY ground plane. Use Value: Survives repeated 8 kV contact discharges without parameter shift, preserving 100 Mbps eye diagram margin. | Use Scenario: ESD hardening of RS-422/RS-485 driver/receiver lines in factory automation HMIs. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on A/B differential bus lines operating up to 10 Mbps. Use Value: Adds <0.5 ns propagation delay and no measurable rise-time degradation at 100 ns edge rates. |
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 NUP4201MR6T1G | 4-channel, 3.5 pF per line, 12 kV air/8 kV contact rating, SOT-563 package (1.6 × 1.6 mm). | Supports four lines vs. two; larger footprint but higher ESD margin; requires different layout spacing. | Select when protecting >2 lines or needing higher IEC 61000-4-2 margin; verify PCB pad compatibility. |
| Vishay VEML6030X01 | Single-channel, 0.65 pF, 8 kV contact, SC-70 - lower capacitance but only one channel per device. | Requires two devices for dual-line protection; better for >1 Gbps links but increases BOM count and layout area. | Choose for ultra-high-speed (>1 Gbps) differential signals where <1 pF loading is mandatory. |
Compared with NSAD500S-T1-AT, the NUP4201MR6T1G offers greater channel density and ESD margin at the cost of larger footprint and higher parasitic inductance, while the VEML6030X01 delivers lower capacitance but doubles component count and placement complexity for dual-line protection.
Availability
NSAD500S-T1-AT is available at Aetrix Electronics and suitable for USB2.0 interface protection, IEEE1394 port hardening, and 100BASE-TX Ethernet PHY safeguarding requiring stable component supply across production lifecycles.
Supply support for NSAD500S-T1-AT 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, power, and interface solutions.
The NSAD500S-T1-AT belongs to Renesas' legacy ESD protection portfolio targeting high-speed data interface hardening, with design focus on minimizing capacitive loading while meeting IEC 61000-4-2 Level 4 immunity for consumer and industrial connectivity applications.
FAQ
What is the maximum operating temperature for NSAD500S-T1-AT?
The NSAD500S-T1-AT has a maximum junction temperature of 150°C and a storage temperature range of −55°C to +150°C. For reliable long-term operation, ambient temperature should be kept ≤85°C with adequate PCB copper pour for thermal dissipation. Derating applies above 25°C ambient per the device's thermal resistance profile in the original D16405EJ1V0DS datasheet.
Does NSAD500S-T1-AT support bidirectional signal lines like USB D+ and D−?
Yes, NSAD500S-T1-AT supports bidirectional protection via its dual-cathode common-anode configuration: each cathode (K1/K2) clamps positive transients relative to the shared anode (A), enabling symmetrical protection of differential pairs without polarity constraints. This makes NSAD500S-T1-AT ideal for USB2.0 D+/D− and IEEE1394 TPB/TPA lines.
What is the typical capacitance of NSAD500S-T1-AT and why does it matter?
The NSAD500S-T1-AT has a typical capacitance of 3.5 pF at 1 MHz and 0 V bias. This ultra-low value minimizes signal attenuation and phase distortion on high-speed links - critical for maintaining eye diagram integrity and jitter budgets in 480 Mbps USB2.0 applications where even 5 pF can degrade rise/fall times.
Can NSAD500S-T1-AT replace older NEC ESD devices like NSAD500S without layout changes?
Yes, NSAD500S-T1-AT is a direct replacement for the original NSAD500S in SC-70 packaging, sharing identical pinout (K1, K2, A), electrical specs, and mechanical dimensions. No PCB redesign is needed - the "-T1-AT" suffix denotes tape-and-reel packaging per JEDEC standards, not functional revision.
Is NSAD500S-T1-AT compliant with RoHS and lead-free assembly processes?
Yes, NSAD500S-T1-AT complies with EU RoHS Directive 2011/65/EU and supports lead-free reflow soldering per J-STD-020. The device uses matte tin-plated gull-wing leads and halogen-free molding compound, verified per Renesas' environmental compliance documentation (reference: Renesas Green Procurement Standard).
NSAD500S-T1-AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3V (Max)
- Voltage - Breakdown (Min):
- 5.3V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 2W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 3.5pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70
NSAD500S-T1-AT FAQ
1.How can I place an order for NSAD500S-T1-AT through Aetrix?
Please submit a Request for Quotation (RFQ) for NSAD500S-T1-AT 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 NSAD500S-T1-AT reliable?
The price and inventory of NSAD500S-T1-AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NSAD500S-T1-AT is usually 5 days.
3.What payment methods are accepted for NSAD500S-T1-AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NSAD500S-T1-AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NSAD500S-T1-AT?
NSAD500S-T1-AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NSAD500S-T1-AT 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 NSAD500S-T1-AT?
For technical support, including NSAD500S-T1-AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NSAD500S-T1-AT requirements.
6.How does Aetrix verify that NSAD500S-T1-AT is sourced from the original manufacturer or authorized distributors?
All NSAD500S-T1-AT 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 NSAD500S-T1-AT meets industry standards.
7.What is the process for return or replacement of NSAD500S-T1-AT?
All NSAD500S-T1-AT units undergo pre-shipment inspection (PSI). If there is an issue with NSAD500S-T1-AT, 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 NSAD500S-T1-AT part is unused and in its original packaging.
Return procedure for NSAD500S-T1-AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NSAD500S-T1-AT Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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