onsemi NP3100GBRLG

Overview

NP3100GBRLG from onsemi is a bidirectional thyristor surge protector (TSPD) designed for overvoltage protection in telecom circuits including central office, access, and customer premises equipment. It features 275 V peak off-state voltage (V_DRM), 350 V breakover voltage (V_BO), 4.0 V on-state voltage at 1.0 A, 150 mA holding current, and meets IEC 61000-4-5 and TIA-968-A surge standards.

For engineers reviewing the NP3100GBRLG datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional crowbar action, DO-15 axial package compatibility, 50 A(pk) 10×560 µs surge rating, low capacitance (40 pF), and RoHS-compliant lead-free construction.

Technical Context

The NP3100GBRLG operates as a voltage-triggered crowbar device that latches into low-impedance conduction upon exceeding its symmetric breakover voltage of 350 V in either polarity. It maintains off-state isolation up to 275 V with leakage under 5 µA and sustains conduction until current falls below 150 mA holding threshold.

Its 40 pF typical capacitance at 1 MHz and 2 Vdc bias minimizes signal distortion in high-frequency telecom lines, while its 5.0 kV/µs critical dv/dt rating ensures stable blocking under fast transients without false triggering.

Key Specifications

Pinout & Package

NP3100GBRLG is housed in a DO-15 (Case 59AA) axial-leaded plastic package with cathode band marking. The device has two terminals: MT1 and MT2 - electrically symmetrical, enabling bidirectional operation without polarity assignment.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar thyristor surge protector applications.

Compared with NP3100GARLG, NP3100GBRLG offers identical protection performance with alternate reel packaging; compared with SM15T33AY, it provides true bidirectional, low-capacitance, high-voltage crowbar action essential for telecom line integrity.

Availability

NP3100GBRLG is available at Aetrix Electronics and suitable for digital subscriber line (DSL) interfaces, central office line cards, and customer premises equipment requiring stable component supply and certified surge protection.

Supply support for NP3100GBRLG 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 TSPDs were developed specifically for telecom infrastructure protection, targeting robust, bidirectional, low-distortion surge suppression in central office, access network, and CPE applications.

FAQ

What is the primary function of the NP3100GBRLG in a telecom circuit?

The NP3100GBRLG functions as a bidirectional thyristor surge protector (TSPD) that acts as a crowbar device-triggering into low-impedance conduction when voltage exceeds 350 V in either polarity. It diverts surge energy away from sensitive components such as line drivers and codecs. Its 275 V off-state rating and 4.0 V on-state voltage ensure reliable blocking and low-clamp protection. NP3100GBRLG is engineered for telecom line protection where bidirectional transient immunity and minimal signal distortion are critical.

Does the NP3100GBRLG require a gate drive or control signal to operate?

No, the NP3100GBRLG is a passive, voltage-triggered device with no gate terminal or control input. It relies solely on intrinsic thyristor characteristics-triggering automatically when applied voltage across MT1–MT2 reaches 350 V (V_BO) in either direction. Once triggered, it latches on until current drops below 150 mA (I_H). This self-triggering behavior makes NP3100GBRLG ideal for unattended, fail-safe surge protection without supporting circuitry.

What surge standards does the NP3100GBRLG comply with?

The NP3100GBRLG is explicitly rated to meet IEC 61000-4-5 (10/700 µs & 1.2/50 µs waveforms), IEC 60950, TIA-968-A (10×560 µs, 50 A_pk), and EN 60950. These certifications validate its use in telecom infrastructure subject to regulatory safety and immunity testing. The device's 50 A_pk rating under TIA-968-A and 80 A_pk under GR-1089-CORE confirms its suitability for central office and access network deployments. NP3100GBRLG documentation cites these standards directly in its preferred devices listing.

How does the NP3100GBRLG differ from a standard TVS diode?

Unlike unidirectional or bidirectional TVS diodes, the NP3100GBRLG is a latching thyristor device-it remains in low-impedance conduction after triggering until current falls below 150 mA, providing sustained crowbar protection during long-duration surges. TVS diodes clamp dynamically but do not latch, leading to higher clamping voltage under high-current surges. With only 40 pF capacitance and symmetric 350 V V_BO, NP3100GBRLG delivers lower signal distortion and true AC-line compatibility-key advantages over TVS alternatives like SMAJ33A or P6KE33CA in telecom applications.

Is the NP3100GBRLG compatible with automated PCB assembly processes?

Yes, the NP3100GBRLG is supplied in tape-and-reel format (5000 units per reel) compliant with EIA-481 standards and optimized for pick-and-place machines. Its DO-15 (Case 59AA) axial package has defined lead spacing and coplanarity per JEDEC DO-41 outlines, and the G-suffix confirms RoHS-compliant, lead-free terminations compatible with standard reflow or wave solder profiles. The cathode band marking supports automated optical inspection (AOI). NP3100GBRLG's mechanical and thermal specifications align with IPC-7351 guidelines for axial-leaded components in high-volume manufacturing.