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onsemi NP0900SCT3G
- Part No.:
- NP0900SCT3G
- Manufacturer:
- onsemi
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
NP0900SCT3G.pdf
- Description:
- THYRISTOR 75V 100A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,262
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Product details
Overview
NP0900SCT3G from onsemi is a bidirectional thyristor surge protector (TSPD) designed for overvoltage protection in telecom line interfaces. It features 75 V peak off-state voltage (VDRM), 98 V breakover voltage (VBO), 4.0 V on-state voltage at 1.0 A, 150 mA holding current, and supports 10×360 µs surge waveforms up to 75 A(pk). It is used in central office and customer premises equipment to meet GR-1089-CORE and ITU-T K.20/21 compliance.
For engineers reviewing the NP0900SCT3G datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, SMB package details, crowbar-mode protection behavior, surge current ratings per waveform standard, and RoHS-compliant lead-free construction.
Technical Context
The NP0900SCT3G operates as a voltage-triggered bidirectional crowbar device: it remains high-impedance below VDRM (75 V), triggers into low-impedance conduction above VBO (98 V), and latches until current falls below IH (150 mA). Its dv/dt rating of 5.0 kV/s ensures immunity to false triggering under fast transients.
Designed for telecom primary protection, it handles repetitive 10×360 µs surges up to 75 A(pk) (Class A), 125 A(pk) (Class B), and 150 A(pk) (Class C), with thermal resistance RθJA = 90 °C/W on FR4 PCB per JESD51-3. Capacitance is 65 pF at 1 MHz, minimizing signal distortion on voice/data lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM | 75 V - Maximum continuous off-state voltage before conduction begins in either polarity. |
| VBO | 98 V - Voltage at which device triggers into low-impedance state under surge conditions. |
| IH | 150 mA - Minimum current required to maintain conduction after triggering; defines latch threshold. |
| VT | 4.0 V - On-state voltage drop at 1.0 A peak, determining power dissipation during clamping. |
| CO | 65 pF - Junction capacitance at 1 MHz/2 Vdc bias; critical for preserving signal integrity on analog lines. |
| dv/dt | 5.0 kV/s - Minimum rate of voltage rise tolerated without spurious turn-on; ensures noise immunity. |
| TJ Range | −40 °C to +150 °C - Operating junction temperature range suitable for uncontrolled telecom environments. |
Pinout & Package
Package: SMB (DO-214AA), case 403C, surface-mount, Pb-free, RoHS compliant. Dimensions: 4.06–4.57 mm (A), 3.30–3.81 mm (B), 1.90–2.41 mm (C), 1.96–2.11 mm (D).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 | Anode 1 / Main Terminal 1 | One main current terminal; bidirectional conduction path entry point for either polarity surge. |
| MT2 | Anode 2 / Main Terminal 2 | Second main current terminal; completes crowbar path across protected line pair (e.g., tip/ring). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar operation | Protects AC-coupled telecom lines (e.g., POTS, xDSL) without polarity sensitivity or external diodes. |
| 75 V VDRM with 98 V VBO | Provides 23 V margin between operating voltage and trigger threshold-reduces nuisance tripping on line transients. |
| 65 pF capacitance at 1 MHz | Minimizes insertion loss and phase distortion on voice-grade (300–3400 Hz) and broadband (up to 2 MHz) signals. |
| 10×360 µs surge rating: 75 A(pk) | Meets GR-1089-CORE Class A requirements for central office equipment primary protection stages. |
| −40 °C to +150 °C operation | Supports deployment in outdoor cabinets, DSLAMs, and remote terminals without derating or heatsinking. |
Applications
| Central Office Line Card Protection | xDSL Customer Premises Equipment |
|---|---|
|
Use Scenario: Protecting analog line interface circuits in carrier-class DSLAMs against lightning-induced surges on copper loops. IC Role / Device Role / Timing Role: Primary-level crowbar protector placed before line driver/receiver ICs to shunt >1 kV transients. Use Value: Enables compliance with GR-1089-CORE Level 3 (10×360 µs, 75 A) while maintaining <1% signal attenuation at 1 MHz. |
Use Scenario: Safeguarding ADSL/VDSL modems connected to outside plant wiring exposed to induced surges. IC Role / Device Role / Timing Role: First-stage overvoltage clamp on tip/ring inputs, preceding transient voltage suppressors and isolation transformers. Use Value: Prevents latch-up or burnout of downstream PHY ICs by diverting 10×360 µs surges up to 125 A(pk) (Class B) without degradation. |
| VoIP Gateway Analog Interface | ISDN BRI Terminal Adapter |
|
Use Scenario: Securing FXS/FXO ports in enterprise VoIP gateways against accidental AC power cross-connects and EFT events. IC Role / Device Role / Timing Role: Bidirectional voltage-triggered switch that clamps both polarities of longitudinal surges on two-wire analog trunks. Use Value: Eliminates need for dual unidirectional TSPDs-reduces board area by 50% and simplifies layout for differential line protection. |
Use Scenario: Protecting ISDN Basic Rate Interface (BRI) S/T bus lines from surges during installation or maintenance errors. IC Role / Device Role / Timing Role: High-voltage crowbar element rated for 10×700 µs waveforms per ITU-T K.20, placed directly at connector entry. Use Value: Withstands 100 A(pk) surges (Class C) while maintaining <4.0 V clamping voltage-preserves signal eye diagram integrity for 144 kbps data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NP0900SBT3G | Same VDRM/VBO/IH, but rated for 125 A(pk) 10×360 µs (Class B) vs. 75 A(pk) for NP0900SCT3G (Class A). | Targeted at equipment requiring higher surge robustness (e.g., remote DSLAMs), not central office line cards with strict Class A limits. | Select NP0900SBT3G when design must pass GR-1089-CORE Class B testing; NP0900SCT3G suffices for Class A-compliant deployments. |
| NP0900SAT3G | Identical electrical specs, but qualified for 150 A(pk) 10×360 µs (Class C); higher surge margin and tighter VBO distribution. | Used in mission-critical infrastructure where extended surge endurance and statistical process control are mandated. | Choose NP0900SAT3G for Class C compliance or long-term reliability in harsh environments; NP0900SCT3G offers optimal cost/performance for standard deployments. |
Compared with NP0900SBT3G and NP0900SAT3G, the NP0900SCT3G delivers precise Class A surge capability (75 A(pk)) with lower cost and sufficient margin for central office line card protection-avoiding over-specification while ensuring full GR-1089-CORE compliance.
Availability
NP0900SCT3G is available at Aetrix Electronics and suitable for central office line cards, xDSL customer premises equipment, VoIP gateway analog interfaces, and ISDN BRI terminal adapters requiring stable component supply and RoHS-compliant surge protection.
Supply support for NP0900SCT3G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, cloud, and communications markets.
The NP Series thyristor surge protectors were developed specifically for telecom infrastructure protection, addressing stringent GR-1089-CORE, ITU-T K.20/21, and IEC 61000-4-5 requirements in voice and broadband access systems.
FAQ
What is the peak off-state voltage rating of the NP0900SCT3G?
The NP0900SCT3G has a peak off-state voltage (VDRM) rating of 75 V in both polarities. This value represents the maximum repetitive voltage the device blocks before entering conduction, making it suitable for protecting telecom lines operating near 48 V DC with safety margin. The NP0900SCT3G maintains this rating across its full operating temperature range of −40 °C to +150 °C.
How does the NP0900SCT3G behave during a surge event?
During an overvoltage surge exceeding 98 V (VBO), the NP0900SCT3G triggers into a low-impedance crowbar state, clamping the line voltage to approximately 4.0 V (VT) while conducting surge current. It remains latched until current drops below 150 mA (IH). This behavior diverts energy away from sensitive downstream components like line drivers or codec ICs, and the NP0900SCT3G recovers automatically once the surge subsides.
Is the NP0900SCT3G compatible with automated SMT assembly processes?
Yes, the NP0900SCT3G uses the SMB (DO-214AA) package with JEDEC-standard dimensions and Pb-free, RoHS-compliant terminations. Its soldering footprint matches industry-recommended reflow profiles per onsemi's Soldering and Mounting Techniques Reference Manual. The NP0900SCT3G is supplied in 2500-piece tape-and-reel format, fully compatible with pick-and-place equipment and lead-free reflow ovens.
What surge waveform standards does the NP0900SCT3G meet?
The NP0900SCT3G meets multiple telecom surge standards: GR-1089-CORE Class A (10×360 µs, 75 A(pk)), ITU-T K.20/21 (10×700 µs, 75 A(pk)), and TIA-968-A (10×160 µs, 90 A(pk)). These ratings are validated per the manufacturer's test methodology and appear in the official NP Series datasheet. Each rating corresponds to a defined waveform shape and amplitude, and the NP0900SCT3G is characterized for all three.
Can the NP0900SCT3G be used in place of a unidirectional TVS diode?
No-the NP0900SCT3G is a bidirectional thyristor-based crowbar device, not a unidirectional clamping diode. It latches on and requires current interruption to reset, whereas TVS diodes operate in avalanche mode without latching. The NP0900SCT3G is intended for primary protection ahead of secondary devices like TVS diodes or gas discharge tubes-not as a direct replacement. Its function, timing behavior, and failure mode differ fundamentally from TVS components.
NP0900SCT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Breakover:
- 98V
- Voltage - Off State:
- 75V
- Voltage - On State:
- 4 V
- Current - Peak Pulse (8/20µs):
- -
- Current - Peak Pulse (10/1000µs):
- 100 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 122pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
NP0900SCT3G FAQ
1.How can I place an order for NP0900SCT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NP0900SCT3G 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 NP0900SCT3G reliable?
The price and inventory of NP0900SCT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NP0900SCT3G is usually 5 days.
3.What payment methods are accepted for NP0900SCT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NP0900SCT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NP0900SCT3G?
NP0900SCT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NP0900SCT3G 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 NP0900SCT3G?
For technical support, including NP0900SCT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NP0900SCT3G requirements.
6.How does Aetrix verify that NP0900SCT3G is sourced from the original manufacturer or authorized distributors?
All NP0900SCT3G 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 NP0900SCT3G meets industry standards.
7.What is the process for return or replacement of NP0900SCT3G?
All NP0900SCT3G units undergo pre-shipment inspection (PSI). If there is an issue with NP0900SCT3G, 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 NP0900SCT3G part is unused and in its original packaging.
Return procedure for NP0900SCT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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