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onsemi NP0720SAT3G
- Part No.:
- NP0720SAT3G
- Manufacturer:
- onsemi
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
NP0720SAT3G.pdf
- Description:
- THYRISTOR 65V 50A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,170
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Product details
Overview
NP0720SAT3G from onsemi is a bidirectional thyristor surge protector (TSPD) designed for overvoltage protection in telecom line interfaces. It features 65 V peak off-state voltage (VDRM), 88 V breakover voltage (VBO), 4.0 V on-state voltage at 1.0 A, 150 mA holding current, and supports GR-1089-CORE and IEC 61000-4-5 surge compliance in central office and customer premises equipment.
For engineers reviewing the NP0720SAT3G datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional crowbar action, SMB package thermal performance (RθJA = 90°C/W), 10×160 µs surge rating up to 90 A(pk), and compatibility with TIA-968-A and ITU-T K.20/21 transient immunity requirements.
Technical Context
The NP0720SAT3G operates as a voltage-triggered crowbar device: when transient voltage exceeds 88 V in either polarity, it switches to low-impedance conduction, clamping the protected line and diverting surge current away from downstream circuitry. Its bidirectional symmetry eliminates need for back-to-back diac or dual-device arrangements.
It sustains 65 V steady-state blocking in both directions, holds conduction at ≥150 mA after triggering, and recovers to high-impedance state only after current falls below that threshold. Critical dv/dt rating of 5.0 kV/s prevents false triggering from fast-rising noise transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM | 65 V - Maximum continuous reverse/forward blocking voltage before conduction; defines safe operating window for telecom line interface. |
| VBO | 88 V - Voltage threshold at which device triggers into low-impedance state in either polarity; sets primary overvoltage trip point. |
| IH | 150 mA - Minimum current required to maintain conduction after triggering; ensures reliable crowbar hold during surge decay. |
| VT | 4.0 V - On-state voltage drop at 1.0 A peak; determines power dissipation (4.0 W instantaneous) and clamping level during surge. |
| IPPS (10×160 µs) | 90 A(pk) - Peak non-repetitive surge current capability under TIA-968-A waveform; validates robustness against lightning-induced transients. |
| CO | 79 pF - Typical capacitance at 1 MHz / 2 Vdc bias; low enough to avoid signal integrity degradation in voice/data lines. |
| TJ Range | −40°C to +150°C - Operating junction temperature range; supports deployment in uncontrolled environmental enclosures. |
Pinout & Package
SMB package (JEDEC DO-214AA, Case 403C), surface-mount, bidirectional two-terminal device with no internal asymmetry. MT1 and MT2 terminals are electrically identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 | Anode/Cathode (bidirectional) | Either terminal may serve as anode or cathode depending on transient polarity; no fixed polarity assignment. |
| MT2 | Anode/Cathode (bidirectional) | Electrically symmetric to MT1; completes crowbar path across protected line pair without directional constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar action | Single-device replacement for back-to-back SCRs or diacs; reduces PCB area by ~50% vs dual-component solutions. |
| GR-1089-CORE & IEC 61000-4-5 compliance | Validated for Level 3 (150 A pk, 2×10 µs) and Level 4 (75 A pk, 10×360 µs) telecom surge immunity testing. |
| Low 79 pF capacitance | Minimizes insertion loss and phase distortion on POTS, xDSL, and ISDN lines up to 2 MHz. |
| Pb-free, RoHS-compliant SMB package | Compatible with lead-free reflow profiles (J-STD-020); thermal resistance RθJA = 90°C/W enables >1 W sustained power handling on standard FR4. |
| 150 mA holding current | Ensures stable latching during multi-cycle surges while allowing clean recovery post-event without external gate control. |
Applications
| Central Office Line Card Protection | Digital Subscriber Line (xDSL) Interface |
|---|---|
|
Use Scenario: Protects line interface ICs and transformers on Class 5 switch line cards from lightning-induced surges entering via tip/ring pairs. IC Role / Device Role / Timing Role: Crowbar-type transient voltage suppressor placed between line transformer secondary and codec input. Use Value: Withstands 90 A(pk) 10×160 µs surges per GR-1089-CORE, preventing latch-up or burnout of sensitive analog front-end components. |
Use Scenario: Shields ADSL/VDSL line drivers and receivers from induced transients on twisted-pair copper loops up to 3000 m. IC Role / Device Role / Timing Role: Primary overvoltage clamp on differential line side, upstream of hybrid coupler and line driver. Use Value: 79 pF capacitance avoids attenuation of high-frequency upstream/downstream signals (up to 30 MHz for VDSL2), preserving SNR and data rate. |
| Customer Premises Equipment (CPE) | ISDN Basic Rate Interface (BRI) |
|
Use Scenario: Integrated into DSL modems, VoIP gateways, and residential routers to meet FCC Part 68 and UL 1950 safety requirements. IC Role / Device Role / Timing Role: Secondary surge protection stage after gas discharge tube (GDT), providing fast-response clamping. Use Value: 5.0 kV/s dv/dt immunity prevents false triggering from ringing voltage or switching noise, ensuring system uptime. |
Use Scenario: Protects S/T interface circuits in ISDN terminal adapters and NT1 devices against longitudinal surges on 2B+D lines. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across B1/B2 channels and D channel, referenced to protective earth. Use Value: Symmetric 65 V VDRM and 88 V VBO match ISDN's ±130 V nominal loop voltage and 220 V peak ringing tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NP0720SBT3G | Same electrical specs; differs only in marking code (072B vs 072A) and surge rating tier (B-tier: 150 A pk @ 2×10 µs, 125 A pk @ 10×360 µs). | Higher surge capacity in short-duration waveforms; suitable where GR-1089-CORE Level 3 compliance is mandatory. | Select NP0720SBT3G if design requires margin above 90 A(pk) for 10×160 µs events or must pass worst-case 2×10 µs testing. |
| NP0720SCT3G | Identical VDRM, VBO, IH; rated for C-tier surge (200 A pk @ 2×10 µs, 150 A pk @ 10×360 µs, 100 A pk @ 10×1000 µs). | Extended endurance for long-tail surges (10×1000 µs); optimized for harsher environments like remote DSLAM cabinets. | Choose NP0720SCT3G when protecting infrastructure-grade equipment exposed to repeated or high-energy transients. |
Compared with NP0720SBT3G and NP0720SCT3G, the NP0720SAT3G provides baseline telecom surge protection with verified 90 A(pk) capability at 10×160 µs - sufficient for most CPE and access network deployments - while offering cost and inventory advantages over higher-tier variants.
Availability
NP0720SAT3G is available at Aetrix Electronics and suitable for central office line cards, xDSL modems, ISDN terminal adapters, and VoIP gateway designs requiring stable component supply, RoHS-compliant packaging, and repeatable surge immunity performance.
Supply support for NP0720SAT3G 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 consumer markets.
The NP Series thyristor surge protectors were developed specifically for telecom infrastructure and CPE applications requiring bidirectional, low-capacitance, high-surge-capability overvoltage protection - addressing GR-1089-CORE, IEC 61000-4-5, and ITU-T K.20/21 compliance in compact SMB packages.
FAQ
What is the maximum continuous operating voltage for NP0720SAT3G?
The NP0720SAT3G has a peak off-state voltage (VDRM) of 65 V in both polarities, meaning it can continuously block up to ±65 V DC or peak AC without triggering. This rating applies across its full operating temperature range of −40°C to +150°C and forms the basis for safe line interface design in telecom applications.
Does NP0720SAT3G require a gate drive or external trigger circuit?
No, the NP0720SAT3G is a gateless, voltage-triggered thyristor device. It switches automatically into low-impedance conduction when voltage across MT1–MT2 exceeds 88 V (VBO) in either direction. No external control signal, timing circuit, or gate resistor is needed - simplifying protection design and reducing bill-of-materials count.
How does NP0720SAT3G compare to TVS diodes for telecom surge protection?
Unlike unidirectional TVS diodes, the NP0720SAT3G provides symmetrical bidirectional clamping without polarity sensitivity. Its thyristor structure offers lower clamping voltage under high-current surges (4.0 V at 1.0 A) and superior energy handling (90 A pk @ 10×160 µs) compared to similarly sized TVS devices, making it preferred for GR-1089-CORE–compliant telecom line protection.
Can NP0720SAT3G be used in series or parallel configurations?
The NP0720SAT3G is not intended for parallel use due to inherent parameter variation that could cause current imbalance and premature failure. In series configurations, voltage sharing must be actively managed with balancing resistors; however, single-device implementation is strongly recommended per onsemi's application guidance for the NP Series.
What is the thermal resistance and power dissipation limit of NP0720SAT3G?
The NP0720SAT3G has a junction-to-ambient thermal resistance (RθJA) of 90°C/W on a standard FR4 PCB (3″×4.5″, 2 oz copper). At its 4.0 V on-state voltage and 1.0 A peak current, instantaneous power dissipation reaches 4.0 W - but due to pulsed nature of surges, average power remains low. Continuous DC operation is not supported.
NP0720SAT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Breakover:
- 88V
- Voltage - Off State:
- 65V
- Voltage - On State:
- 4 V
- Current - Peak Pulse (8/20µs):
- -
- Current - Peak Pulse (10/1000µs):
- 50 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 79pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
NP0720SAT3G FAQ
1.How can I place an order for NP0720SAT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NP0720SAT3G 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 NP0720SAT3G reliable?
The price and inventory of NP0720SAT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NP0720SAT3G is usually 5 days.
3.What payment methods are accepted for NP0720SAT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NP0720SAT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NP0720SAT3G?
NP0720SAT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NP0720SAT3G 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 NP0720SAT3G?
For technical support, including NP0720SAT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NP0720SAT3G requirements.
6.How does Aetrix verify that NP0720SAT3G is sourced from the original manufacturer or authorized distributors?
All NP0720SAT3G 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 NP0720SAT3G meets industry standards.
7.What is the process for return or replacement of NP0720SAT3G?
All NP0720SAT3G units undergo pre-shipment inspection (PSI). If there is an issue with NP0720SAT3G, 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 NP0720SAT3G part is unused and in its original packaging.
Return procedure for NP0720SAT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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