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onsemi NP1500SCMCT3G
- Part No.:
- NP1500SCMCT3G
- Manufacturer:
- onsemi
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
NP1500SCMCT3G.pdf
- Description:
- THYRISTOR 140V 400A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,744
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Product details
Overview
NP1500SCMCT3G from onsemi is a bidirectional ultra-low-capacitance thyristor surge protection device (TSPD) designed for telecom line protection in xDSL and T1/E1 interfaces. It features ±140 V repetitive peak off-state voltage (VDRM), ±180 V breakover voltage (VBO), 4 V on-state voltage (VT), 23 pF nominal off-state capacitance at 1 MHz, and 150 mA holding current (IH). It operates in SMB (DO-214AA) surface-mount package and complies with GR-1089-CORE, IEC 61000-4-5, and ITU-T K.20/K.21.
For engineers reviewing the NP1500SCMCT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, telecom-specific surge ratings, thermal resistance (90 °C/W), RoHS-compliant Pb-free packaging, and real-world deployment context for DSL central office and customer premise equipment.
Technical Context
The NP1500SCMCT3G functions as a crowbar-type transient protector: it remains high-impedance (open-circuit) during normal operation-exhibiting only 5 µA off-state leakage at VDRM-and switches to low-impedance (short-circuit) when transient voltage exceeds ±180 V, clamping surges via a 4 V on-state voltage drop. Its 23 pF off-state capacitance ensures minimal signal distortion in broadband data lines up to 10+ MHz.
It supports non-repetitive surge currents up to 150 A (2×10 µs waveform), 75 A (10×360 µs), and 50 A (10×1000 µs), with thermal resistance of 90 °C/W enabling reliable operation across −40 °C to +150 °C junction temperature range. The device is rated for fail-safe short-circuit behavior under overvoltage fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM | ±140 V - Maximum continuous AC/DC voltage before conduction; must exceed system operating peak voltage (e.g., 48 V DC + 150 V RMS ring = ~260 V peak). |
| VBO | ±180 V - Guaranteed maximum clamping voltage seen by protected circuit; defines protection threshold below equipment failure limit. |
| CO | 23 pF - Ultra-low differential capacitance at 1 MHz/2 Vdc bias; preserves signal integrity in high-speed DSL/T1/E1 data paths. |
| IH | 150 mA - Minimum current required to sustain conduction; must exceed system fault-hold current to avoid latch-up after surge. |
| VT | 4 V - Low on-state voltage enables high surge current (up to 150 A) without excessive power dissipation in SMB package. |
| IPPS (2×10 µs) | 150 A - Peak non-repetitive surge current rating; validates robustness against lightning-induced transients per GR-1089-CORE Class A. |
| RθJA | 90 °C/W - Junction-to-ambient thermal resistance on standard FR4 PCB; determines safe power derating for repeated surge events. |
Pinout & Package
NP1500SCMCT3G is housed in an SMB (DO-214AA, Case 403C) surface-mount package measuring 4.57 mm × 3.81 mm × 2.11 mm (L × W × H), with gull-wing leads optimized for automated assembly and thermal performance on 2 oz copper PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry point (bidirectional) | Accepts transient energy from either polarity; symmetric structure enables identical ±140 V VDRM and ±180 V VBO. |
| Cathode (K) | Surge current return path to ground | Completes low-impedance crowbar path during overvoltage; connects directly to system ground plane for minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-state capacitance | 23 pF at 1 MHz - Enables use in >10 MHz broadband data lines (e.g., ADSL2+, VDSL2) without signal attenuation or crosstalk. |
| Low leakage transparency | 5 µA max IDRM at VDRM - Ensures no loading or DC offset on live telecom lines during normal operation. |
| Precise bidirectional breakover | ±180 V VBO with tight tolerance - Guarantees consistent clamping level across both polarities for balanced line protection. |
| High surge current capability | 150 A (2×10 µs) - Meets GR-1089-CORE Level A surge immunity requirements for central office equipment. |
| Pb-free, RoHS-compliant packaging | SMB (DO-214AA) with matte tin lead finish - Supports lead-free reflow soldering and meets global environmental compliance mandates. |
Applications
| xDSL Central Office Line Card | T1/E1 Data Interface Protection |
|---|---|
Use Scenario: Protecting line interface circuits on DSLAM line cards exposed to lightning-induced surges on twisted-pair subscriber loops. IC Role / Device Role / Timing Role: Bidirectional crowbar protector placed between tip/ring and SLIC, switching to low-impedance state within nanoseconds when VBO is exceeded. Use Value: Prevents damage to sensitive SLIC and codec ICs while maintaining <23 pF line capacitance to preserve ADSL2+ spectral compatibility and reach. | Use Scenario: Safeguarding T1/E1 framer and transformer-coupled physical layer interfaces in telecom access equipment. IC Role / Device Role / Timing Role: Primary surge shunt element across differential pair, activated by induced transients exceeding ±180 V, diverting energy to chassis ground. Use Value: Enables compliance with TIA-968-A and ITU-T K.21 standards while supporting 2.048 Mbps E1 and 1.544 Mbps T1 data rates without jitter or bit errors. |
| Customer Premise Equipment (CPE) | Broadband Voice Gateway Protection |
Use Scenario: Integrated protection in residential DSL modems and routers handling POTS/DSL coexistence on shared copper lines. IC Role / Device Role / Timing Role: First-line transient suppressor located at RJ-11 jack input, operating transparently during voice-band signaling and DSL data transmission. Use Value: Eliminates need for external gas discharge tubes or MOVs; reduces BOM count and PCB area while meeting FCC Part 68 and UL 1950 safety requirements. | Use Scenario: Protecting analog telephony adapters (ATAs) and VoIP gateways connected to PSTN lines subject to power cross and lightning surges. IC Role / Device Role / Timing Role: Fail-safe short-circuit protector that latches only during fault and resets automatically once line voltage returns to safe levels. Use Value: Maintains voice call continuity during minor transients and guarantees equipment survival during severe 10×1000 µs surges per GR-1089-CORE Level C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NP1500SCMC | Same electrical specs (±140 V VDRM, ±180 V VBO, 23 pF), but in legacy non-RoHS SMB package (no "T3G" suffix). | Not suitable for new designs requiring RoHS compliance or lead-free assembly; identical placement and function on PCB. | Select NP1500SCMCT3G for all new production; NP1500SCMC only for legacy repair or non-RoHS environments. |
| SM15T14A | Unidirectional TVS diode (not thyristor); 14 V working voltage, 23.1 V VBR, 1500 W peak power; higher capacitance (~350 pF). | Limited to low-speed or DC-biased lines; unsuitable for AC-coupled telecom interfaces due to polarity asymmetry and excessive capacitance. | Use only for non-AC-line applications where bidirectionality and sub-30 pF are not required; not a functional substitute for NP1500SCMCT3G in DSL/T1. |
Compared with NP1500SCMC, NP1500SCMCT3G adds RoHS compliance and Pb-free processing without electrical trade-offs; compared with SM15T14A, it provides true bidirectional clamping, 10× lower capacitance, and telecom-grade surge ratings-making it uniquely suited for high-speed AC-coupled line protection.
Availability
NP1500SCMCT3G is available at Aetrix Electronics and suitable for xDSL central office systems, T1/E1 telecom infrastructure, and broadband voice gateway designs requiring stable component supply, long lifecycle support, and certified surge immunity.
Supply support for NP1500SCMCT3G 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 NPMC Series-including NP1500SCMCT3G-is engineered specifically for telecom line protection, delivering ultra-low capacitance, precise bidirectional clamping, and GR-1089-CORE-certified surge robustness in compact SMB packages.
FAQ
What is the primary protection function of the NP1500SCMCT3G in telecom circuits?
The NP1500SCMCT3G acts as a bidirectional crowbar device: it remains highly transparent (23 pF, 5 µA leakage) during normal operation and switches to a low-impedance state when voltage exceeds ±180 V, shunting surge current to ground. This protects downstream SLICs, codecs, and transformers from lightning and power-cross transients while preserving signal fidelity in DSL and T1/E1 applications.
Does the NP1500SCMCT3G meet GR-1089-CORE Level A surge requirements?
Yes, the NP1500SCMCT3G supports 150 A peak surge current under the 2×10 µs waveform specified in GR-1089-CORE Level A. Its design-including ±140 V VDRM, ±180 V VBO, and fail-safe short-circuit behavior-aligns with the standard's requirements for central office equipment, and it is explicitly cited in onsemi's application documentation for GR-1089-CORE compliance.
Can the NP1500SCMCT3G be used in AC-coupled xDSL line interfaces?
Yes, the NP1500SCMCT3G is specifically designed for AC-coupled telecom interfaces. Its bidirectional symmetry (identical ±140 V VDRM and ±180 V VBO), ultra-low 23 pF capacitance, and low 5 µA off-state leakage ensure minimal impact on ADSL/VDSL signal integrity, echo cancellation, and spectral compatibility-making it ideal for tip/ring protection in both central office and CPE DSL line cards.
What is the thermal performance limitation of the NP1500SCMCT3G during repeated surge events?
The NP1500SCMCT3G has a junction-to-ambient thermal resistance (RθJA) of 90 °C/W on a standard FR4 PCB. During repeated surges, cumulative heating must be managed: each 150 A (2×10 µs) event dissipates ~600 mJ, and sustained duty cycles require derating per onsemi's thermal guidelines. For high-frequency surge environments, board layout with thermal vias and copper pour is recommended to maintain TJ ≤ 150 °C.
How does the NP1500SCMCT3G differ from standard TVS diodes in telecom protection?
Unlike unidirectional TVS diodes (e.g., SM15T14A), the NP1500SCMCT3G is a bidirectional thyristor with symmetrical ±180 V clamping, 23 pF capacitance, and crowbar action-enabling true AC-line protection without polarity concerns. Standard TVS diodes exhibit higher capacitance (>300 pF), asymmetric breakdown, and voltage-dependent leakage, making them unsuitable for high-speed telecom data lines where the NP1500SCMCT3G excels.
NP1500SCMCT3G 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):
- 400 A
- Current - Peak Pulse (10/1000µs):
- 100 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 33pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
NP1500SCMCT3G FAQ
1.How can I place an order for NP1500SCMCT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NP1500SCMCT3G 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 NP1500SCMCT3G reliable?
The price and inventory of NP1500SCMCT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NP1500SCMCT3G is usually 5 days.
3.What payment methods are accepted for NP1500SCMCT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NP1500SCMCT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NP1500SCMCT3G?
NP1500SCMCT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NP1500SCMCT3G 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 NP1500SCMCT3G?
For technical support, including NP1500SCMCT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NP1500SCMCT3G requirements.
6.How does Aetrix verify that NP1500SCMCT3G is sourced from the original manufacturer or authorized distributors?
All NP1500SCMCT3G 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 NP1500SCMCT3G meets industry standards.
7.What is the process for return or replacement of NP1500SCMCT3G?
All NP1500SCMCT3G units undergo pre-shipment inspection (PSI). If there is an issue with NP1500SCMCT3G, 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 NP1500SCMCT3G part is unused and in its original packaging.
Return procedure for NP1500SCMCT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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