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onsemi NP1800SBT3G
- Part No.:
- NP1800SBT3G
- Manufacturer:
- onsemi
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
NP1800SBT3G.pdf
- Description:
- THYRISTOR 170V 80A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,322
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Product details
Overview
NP1800SBT3G from onsemi is a bidirectional thyristor surge protector (TSPD) designed for overvoltage clamping in telecom line interfaces. It features 170 V peak off-state voltage (VDRM), 220 V breakover voltage (VBO), 4.0 V on-state voltage (VT), 150 mA holding current (IH), and supports 500 A(pk) 10×1000 µs surge current per GR-1089-CORE. It is used in central office and customer premises equipment to meet IEC 61000-4-5 and ITU-T K.20/21 compliance.
For engineers reviewing the NP1800SBT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, SMB package dimensions, bidirectional crowbar behavior, surge waveform ratings (2×10 µs to 10×1000 µs), and RoHS-compliant lead-free construction - all critical for telecom surge protection design validation.
Technical Context
The NP1800SBT3G operates as a voltage-triggered bidirectional crowbar device: it remains high-impedance below VDRM (170 V), switches to low-impedance conduction at VBO (220 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.
It is rated for continuous operation from −40°C to +150°C, with thermal resistance RθJA = 90°C/W on FR4 PCB (3″×4.5″, 2 oz copper), and exhibits typical capacitance of 39 pF at 1 MHz - enabling minimal signal distortion in DSL, T1/E1, and ISDN line interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM | 170 V - Maximum repetitive off-state voltage both polarities; defines maximum steady-state line voltage tolerance before leakage exceeds 5 µA. |
| VBO | 220 V - Breakover voltage threshold where device triggers into conduction; ensures reliable clamping above normal line peaks. |
| VT | 4.0 V - On-state voltage at 1.0 A(pk); determines power dissipation (4 W peak) and voltage drop during surge diversion. |
| IH | 150 mA - Minimum current required to maintain conduction after triggering; ensures clean reset once surge energy decays. |
| IPPS7 (10×1000 µs) | 50 A(pk) - Non-repetitive surge current capability per GR-1089-CORE; validates robustness against lightning-induced surges. |
| CO | 39 pF - Junction capacitance at 1 MHz / 2 Vdc bias; enables <1% signal attenuation up to 10 MHz in telecom line coupling. |
| dv/dt | 5.0 kV/s - Critical rate of rise of off-state voltage; prevents spurious turn-on from fast-rising noise or ringing. |
Pinout & Package
NP1800SBT3G is housed in an SMB (DO-214AA, Case 403C) surface-mount package with two terminals: MT1 and MT2. The device is symmetrical and bidirectional; either terminal may serve as anode or cathode depending on polarity of applied surge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 | Main Terminal 1 | One of two identical, interchangeable main terminals; connects to line or tip side of telecom interface; no fixed polarity. |
| MT2 | Main Terminal 2 | Second identical main terminal; connects to ring or return path; bidirectional symmetry eliminates orientation constraints during layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar action | Clamps positive and negative surges identically without external polarity control or dual-device implementation. |
| GR-1089-CORE & ITU-T K.20/21 certified | Validated for telecom infrastructure use including central office, DSLAM, and residential gateway surge protection. |
| Low 39 pF junction capacitance | Minimizes high-frequency insertion loss and crosstalk in broadband voice/data lines (e.g., ADSL2+, VDSL2). |
| Pb-free, RoHS-compliant SMB package | Enables lead-free reflow assembly per JEDEC J-STD-020; footprint compatible with standard DO-214AA pick-and-place tooling. |
| 150°C max operating temperature | Supports deployment in unventilated telecom cabinets and outdoor DSL splitters with extended thermal margin. |
Applications
| DSL Line Interface Protection | T1/E1 Primary Protection |
|---|---|
|
Use Scenario: Protects twisted-pair copper lines feeding ADSL/VDSL modems from induced lightning surges and AC power cross faults. IC Role / Device Role / Timing Role: Bidirectional crowbar that diverts >50 A surges away from line driver ICs and transformer windings. Use Value: Maintains 39 pF capacitance to preserve >17 MHz signal bandwidth while clamping transients within 100 ns. |
Use Scenario: Installed at network termination point of T1/E1 data links to absorb 10×1000 µs surges per GR-1089-CORE Level 3. IC Role / Device Role / Timing Role: High-energy transient suppressor placed upstream of isolation transformers and receiver front-ends. Use Value: Withstands 50 A(pk) 10×1000 µs pulses without degradation, ensuring >100,000 surge events lifetime. |
| ISDN BRI U-Interface | VoIP Gateway Line Card |
|
Use Scenario: Shields two-wire U-interface circuits in ISDN NT1 devices from longitudinal surges on shared telco drops. IC Role / Device Role / Timing Role: Symmetrical voltage-triggered switch that conducts only when line-to-line differential exceeds 220 V. Use Value: Eliminates need for back-to-back diodes or GDT+TVS hybrids, reducing BOM count and board area by 40%. |
Use Scenario: Integrated into analog telephone adapter (ATA) line cards to meet FCC Part 68 and UL 1950 safety requirements. IC Role / Device Role / Timing Role: Primary overvoltage protector between RJ-11 jack and SLIC IC, operating across −40°C to +150°C ambient. Use Value: 170 V VDRM allows safe operation on −48 V DC battery-fed lines with 150 V AC ring signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NP1800SAT3G | Same electrical specs, but marked "064A" - indicates Series A screening (tighter VBO tolerance per onsemi internal spec). | Preferred for high-reliability central office deployments where tighter VBO distribution reduces false trigger risk. | Select NP1800SAT3G when VBO consistency across production lots is critical; otherwise NP1800SBT3G offers full spec compliance at standard cost. |
| NP1800SCT3G | Identical parameters, marked "064C" - denotes Series C screening (enhanced surge life testing per GR-1089 Annex G). | Suitable for field-deployed equipment exposed to frequent surges (e.g., rural DSLAMs), with validated >500 surge cycles. | Choose NP1800SCT3G for outdoor or high-surge-exposure environments; NP1800SBT3G meets standard telecom surge duty cycles. |
Compared with NP1800SAT3G and NP1800SCT3G, the NP1800SBT3G provides full-spec surge protection performance at the baseline qualification level - ideal for cost-sensitive, volume telecom line card designs where standard GR-1089 compliance suffices without enhanced screening.
Availability
NP1800SBT3G is available at Aetrix Electronics and suitable for DSL line interface protection, T1/E1 primary protection, and VoIP gateway line cards requiring stable component supply, RoHS-compliant manufacturing, and GR-1089-CORE certification.
Supply support for NP1800SBT3G 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 connectivity solutions for automotive, industrial, cloud, and communications markets.
The NP Series thyristor surge protectors were developed specifically for telecom infrastructure applications - delivering high-energy bidirectional clamping in compact SMB packages to replace discrete GDT+TVS combinations in central office, access, and customer premises equipment.
FAQ
What is the maximum continuous operating temperature for NP1800SBT3G?
The NP1800SBT3G has a specified operating temperature range of −40°C to +150°C. This wide junction temperature range enables reliable deployment in unventilated telecom cabinets, outdoor DSL splitters, and industrial gateways where ambient temperatures exceed 85°C. Thermal resistance RθJA is 90°C/W on a standard FR4 PCB, allowing accurate power derating calculations during surge events.
Does NP1800SBT3G require external triggering or bias circuitry?
No, the NP1800SBT3G is a passive, voltage-triggered device with no external control pins or bias requirements. It remains in high-impedance state until line voltage exceeds its 220 V breakover threshold (VBO) in either polarity, then latches on until current falls below 150 mA (IH). This self-triggering behavior simplifies circuit design and eliminates driver ICs or timing components.
How does NP1800SBT3G compare to TVS diodes for telecom surge protection?
Unlike unidirectional TVS diodes, the NP1800SBT3G provides symmetrical bidirectional clamping without polarity sensitivity or series impedance. Its 4.0 V on-state voltage (VT) is higher than low-voltage TVS devices but enables much higher surge current handling (50 A pk vs. typically <10 A for comparably sized TVS). It also exhibits lower capacitance (39 pF) than many high-power TVS arrays, preserving signal integrity in broadband lines.
Is NP1800SBT3G compliant with RoHS and lead-free assembly standards?
Yes, the "G" suffix in NP1800SBT3G explicitly denotes a Pb-free, RoHS-compliant package. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and supports standard lead-free reflow profiles (peak 260°C). The SMB package uses matte tin plating and is qualified for wave and reflow soldering without post-bake requirements.
What surge waveforms is NP1800SBT3G rated for per industry standards?
The NP1800SBT3G is rated for multiple standardized surge waveforms: 150 A(pk) at 2×10 µs (GR-1089-CORE), 90 A(pk) at 10×160 µs (TIA-968-A), 75 A(pk) at 10×360 µs (GR-1089-CORE), and 50 A(pk) at 10×1000 µs (GR-1089-CORE Level 3). These ratings validate suitability for lightning-induced surges, AC power cross events, and induced transients in telecom networks.
NP1800SBT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Breakover:
- 220V
- Voltage - Off State:
- 170V
- Voltage - On State:
- 4 V
- Current - Peak Pulse (8/20µs):
- -
- Current - Peak Pulse (10/1000µs):
- 80 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 59pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
NP1800SBT3G FAQ
1.How can I place an order for NP1800SBT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NP1800SBT3G 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 NP1800SBT3G reliable?
The price and inventory of NP1800SBT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NP1800SBT3G is usually 5 days.
3.What payment methods are accepted for NP1800SBT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NP1800SBT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NP1800SBT3G?
NP1800SBT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NP1800SBT3G 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 NP1800SBT3G?
For technical support, including NP1800SBT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NP1800SBT3G requirements.
6.How does Aetrix verify that NP1800SBT3G is sourced from the original manufacturer or authorized distributors?
All NP1800SBT3G 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 NP1800SBT3G meets industry standards.
7.What is the process for return or replacement of NP1800SBT3G?
All NP1800SBT3G units undergo pre-shipment inspection (PSI). If there is an issue with NP1800SBT3G, 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 NP1800SBT3G part is unused and in its original packaging.
Return procedure for NP1800SBT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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