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onsemi NP1500SCT3G
- Part No.:
- NP1500SCT3G
- Manufacturer:
- onsemi
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
NP1500SCT3G.pdf
- Description:
- THYRISTOR 140V 100A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,751
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Product details
Overview
NP1500SCT3G from onsemi is a bidirectional thyristor surge protector device (TSPD) designed for overvoltage clamping in telecom line interfaces. It features 140 V peak off-state voltage (VDRM), 180 V breakover voltage (VBO), 4.0 V on-state voltage at 1 A, 150 mA holding current, and supports 500 Apk surge current under 10×1000 µs waveform - deployed in central office and customer premises equipment to meet GR-1089-CORE and IEC 61000-4-5 compliance.
For engineers reviewing the NP1500SCT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, SMB package layout, crowbar-mode protection behavior, surge rating tiers (A/B/C), and direct alternatives for telecom surge protection design-in.
Technical Context
The NP1500SCT3G operates as a bidirectional silicon-controlled rectifier (SCR) with symmetrical voltage-triggered conduction in both polarities. Its 140 V VDRM and 180 V VBO define precise clamping thresholds, while 150 mA IH ensures reliable latching after surge initiation and stable hold until current falls below threshold.
It sustains 500 A/µs di/dt without false triggering and withstands 5 kV/µs dv/dt in off-state, enabling robust immunity against fast transients. Capacitance is 44 pF at 1 MHz/2 Vdc bias, minimizing signal distortion in high-frequency telecom lines such as xDSL and T1/E1 interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM | 140 V - Maximum repetitive off-state voltage before conduction; sets safe operating margin below line fault levels in telecom circuits. |
| VBO | 180 V - Breakover voltage at 800 mA; defines precise crowbar activation point for transient suppression. |
| VT | 4.0 V - On-state voltage at 1 A peak; limits power dissipation during clamping and reduces thermal stress. |
| IH | 150 mA - Minimum current required to maintain conduction; ensures stable latch during sustained overcurrent events. |
| CO | 44 pF - Junction capacitance at 1 MHz/2 Vdc; preserves signal integrity in broadband telecom applications up to ~10 MHz. |
| dv/dt | 5 kV/µs - Critical rate of rise of off-state voltage; prevents spurious turn-on from fast-rising noise or EFT bursts. |
| di/dt | 500 A/µs - Maximum non-repetitive rate of rise of on-state current; enables clean turn-on under high-energy surges. |
Pinout & Package
NP1500SCT3G 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; forms bidirectional conduction path with MT2 during crowbar operation. |
| MT2 | Main Terminal 2 | Second main terminal; electrically symmetric to MT1; no gate control - triggered solely by voltage exceeding VBO. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar action | Clamps positive and negative transients identically without external polarity management or dual-device placement. |
| Pb-free, RoHS-compliant SMB package | Enables lead-free reflow assembly and meets environmental compliance requirements for telecom infrastructure hardware. |
| GR-1089-CORE & IEC 61000-4-5 certified | Validated for Level 3 (500 Apk) surge immunity per 10×1000 µs waveform - suitable for central office deployment. |
| Low 44 pF junction capacitance | Minimizes insertion loss and phase distortion in high-speed digital subscriber line (xDSL) and T1/E1 data interfaces. |
| 150°C maximum junction temperature | Supports operation in thermally demanding telecom chassis environments with extended service life under repeated surge stress. |
Applications
| DSL Line Card Protection | T1/E1 Interface Protection |
|---|---|
|
Use Scenario: Protects copper-pair DSLAM line cards from lightning-induced surges and AC power cross faults. IC Role / Device Role / Timing Role: Bidirectional crowbar device that latches during overvoltage and diverts >500 Apk surge energy to ground. Use Value: Replaces dual unidirectional TSPDs, reducing PCB area by 50% while maintaining full GR-1089-CORE Level 3 compliance. |
Use Scenario: Shields T1/E1 framer ICs and transformers in carrier-grade access multiplexers from induced surges. IC Role / Device Role / Timing Role: Voltage-triggered thyristor that clamps transients above 180 V within nanoseconds and holds until line current decays. Use Value: Ensures bit-error-rate stability under repeated 10×1000 µs surges up to 500 Apk, meeting Telcordia GR-1089 Section 4.4.2.2. |
| Central Office SLIC Protection | Customer Premises Equipment (CPE) |
|
Use Scenario: Safeguards SLIC (Subscriber Line Interface Circuit) outputs in Class 5 switches against tip/ring voltage reversals and lightning ingress. IC Role / Device Role / Timing Role: High-voltage bidirectional protector placed across tip and ring lines, conducting only during overvoltage events. Use Value: Withstands 140 V continuous off-state stress and triggers at 180 V - aligning precisely with ITU-T K.21 recommended limits for metallic interfaces. |
Use Scenario: Integrated into residential DSL modems and VoIP gateways to pass FCC Part 68 and UL 1950 safety certification. IC Role / Device Role / Timing Role: Primary overvoltage shunt element that activates before downstream PHY ICs reach absolute maximum ratings. Use Value: Enables single-device compliance with IEC 60950-1 Clause 4.3.2 and TIA-968-A Category A (200 Apk) surge testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NP1500SAT3G | Same VDRM/VBO/IH, but rated for lower surge tier (A: 150 Apk @ 10×1000 µs vs. C: 500 Apk). | Intended for CPE or low-risk edge applications; not suitable for central office or multi-line aggregation points. | Select NP1500SAT3G only when system-level surge testing requires ≤150 Apk and cost optimization is prioritized over headroom. |
| SM15T150AY | Unidirectional TSPD with 150 V VRWM; requires dual placement for bidirectional protection; higher 60 pF capacitance. | Used where legacy designs mandate discrete unidirectional devices or where board space allows mirrored layout. | Choose SM15T150AY only if redesign permits doubling component count and accepting 36% higher capacitance impact on signal fidelity. |
Compared with NP1500SAT3G and SM15T150AY, the NP1500SCT3G provides highest surge immunity (500 Apk), lowest capacitance (44 pF), and true single-device bidirectionality - making it optimal for space-constrained, high-reliability telecom infrastructure where GR-1089-CORE Level 3 compliance is mandatory.
Availability
NP1500SCT3G is available at Aetrix Electronics and suitable for DSL line card protection, T1/E1 interface hardening, and central office SLIC safeguarding requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for NP1500SCT3G 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, high-reliability components for automotive, industrial, and communications systems.
The NP Series TSPDs were engineered specifically for telecom infrastructure surge protection, targeting GR-1089-CORE, IEC 61000-4-5, and ITU-T K.20/K.21 compliance in central office, access network, and CPE equipment.
FAQ
What is the maximum surge current rating for NP1500SCT3G under the 10×1000 µs waveform?
The NP1500SCT3G is rated for 500 Apk under the 10×1000 µs double-exponential decay waveform per GR-1089-CORE Level 3 testing. This value is specified in the "Surge Ratings" table as IPPS7 = 500 A(pk) for Tier C. The device maintains functional integrity after a single application of this stress level when mounted per JEDEC standards on FR4 PCB with 2 oz copper.
Does NP1500SCT3G require a gate trigger signal to operate?
No, the NP1500SCT3G is a gateless, voltage-triggered thyristor. It conducts automatically when voltage across MT1–MT2 exceeds 180 V (VBO) in either polarity. There is no gate terminal or external control input - operation is purely passive and self-triggering based on applied overvoltage.
What is the thermal resistance (RθJA) of NP1500SCT3G in standard SMB mounting conditions?
The NP1500SCT3G has a thermal resistance of 90 °C/W from junction-to-ambient when mounted on FR4 PCB per EIA/JESD51-3: 3″×4.5″ board, 2 oz copper, fan-out in 3×3 inch pattern. This value assumes no additional heatsinking and is used to calculate junction temperature rise under steady-state leakage or post-surge recovery conditions.
Can NP1500SCT3G be used in DC power line protection?
No - the NP1500SCT3G is designed exclusively for AC-coupled telecom line protection. Its 150 mA holding current (IH) means it will remain latched indefinitely on a DC line once triggered, causing permanent short-circuit failure. It must be used only in circuits where current naturally falls below IH after surge dissipation, such as AC-fed telephone lines or transformer-isolated interfaces.
What marking code appears on the NP1500SCT3G package?
The NP1500SCT3G is marked "150C" on the top surface of its SMB package. Per the ordering table, "150" denotes the 1500 VBO series (i.e., 180 V breakover), and "C" indicates the Tier C surge rating (500 Apk). The "G" suffix in the part number confirms Pb-free/RoHS compliance, which is not encoded in the marking but verified via material declarations.
NP1500SCT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Breakover:
- 180V
- Voltage - Off State:
- 140V
- 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:
- 113pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
NP1500SCT3G FAQ
1.How can I place an order for NP1500SCT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NP1500SCT3G 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 NP1500SCT3G reliable?
The price and inventory of NP1500SCT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NP1500SCT3G is usually 5 days.
3.What payment methods are accepted for NP1500SCT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NP1500SCT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NP1500SCT3G?
NP1500SCT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NP1500SCT3G 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 NP1500SCT3G?
For technical support, including NP1500SCT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NP1500SCT3G requirements.
6.How does Aetrix verify that NP1500SCT3G is sourced from the original manufacturer or authorized distributors?
All NP1500SCT3G 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 NP1500SCT3G meets industry standards.
7.What is the process for return or replacement of NP1500SCT3G?
All NP1500SCT3G units undergo pre-shipment inspection (PSI). If there is an issue with NP1500SCT3G, 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 NP1500SCT3G part is unused and in its original packaging.
Return procedure for NP1500SCT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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