onsemi NTVB065NSA-L

Overview

NTVB065NSA-L from onsemi is a bidirectional thyristor surge protector device (TSPD) designed for overvoltage clamping in telecom line interfaces. It features 65 V peak off-state voltage (VDRM), 88 V breakover voltage (V(BO)), 4.0 V on-state voltage at 1.0 A, 150 mA holding current, and supports 90 A peak surge current (10×160 µs waveform). It protects central office and customer premises equipment per GR-1089-CORE and ITU-T K.20/21.

For engineers reviewing the NTVB065NSA-L datasheet, pinout, applications, or equivalent options, key selection factors include bidirectional crowbar action, SMB package compatibility, 150°C operating junction temperature, low capacitance (79 pF @ 1 MHz), and compliance with TIA-968-A and IEC 61000-4-5 surge immunity standards.

Technical Context

The NTVB065NSA-L operates as a voltage-triggered crowbar device: it remains high-impedance below VDRM (65 V), switches to low-impedance conduction upon reaching V(BO) (88 V), and latches until current falls below IH (150 mA). Its bidirectional symmetry enables protection of AC-coupled telecom lines without polarity constraints.

It delivers defined surge handling per standardized waveforms - 90 A (10×160 µs), 75 A (10×360 µs), and 50 A (10×560 µs) - with thermal resistance of 90°C/W (Junction-to-Ambient, FR4 PCB). Critical dv/dt rating is 5.0 kV/s, ensuring stable blocking under fast transients.

Key Specifications

Pinout & Package

NTVB065NSA-L uses the SMB (DO-214AA, Case 403C) surface-mount package - dimensions 4.06 × 3.30 × 2.11 mm (L × W × H), with gull-wing leads optimized for automated assembly and thermal relief on FR4 PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NTVB065NSA-L, NTVB065NSC-L offers identical protection performance with standardized tape-and-reel logistics, while SM16T65A introduces design complexity for bidirectional coverage - making NTVB065NSA-L the optimal choice for space-constrained, AC-coupled telecom interfaces requiring guaranteed symmetry and minimal BOM count.

Availability

NTVB065NSA-L is available at Aetrix Electronics and suitable for central office line cards, xDSL customer premises equipment, VoIP gateway interfaces, and industrial analog telephony systems requiring stable component supply, long-lifecycle support, and compliance with GR-1089-CORE and ITU-T K.21 standards.

Supply support for NTVB065NSA-L 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 management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NTVB Series is part of onsemi's dedicated surge protection portfolio, engineered specifically for telecom infrastructure applications demanding high-reliability, bidirectional crowbar action, and regulatory compliance across global telephony standards.

FAQ

What is the primary function of the NTVB065NSA-L in a telecom circuit?

The NTVB065NSA-L functions as a bidirectional thyristor surge protector (TSPD) that acts as a crowbar device - remaining non-conductive below 65 V (VDRM), triggering at 88 V (V(BO)) to shunt surge current away from sensitive line interface components. Its symmetric MT1/MT2 terminals enable protection of AC-coupled telephone lines without polarity concerns, and it resets automatically once line current drops below 150 mA (IH). This behavior is confirmed in the onsemi NTVB Series datasheet Rev. 0, October 2010.

Does the NTVB065NSA-L meet GR-1089-CORE Level 3 surge requirements?

Yes, the NTVB065NSA-L supports GR-1089-CORE Level 3 surge testing with a nominal 150 A peak pulse current for the 2×10 µs waveform, as specified in the "SURGE DATA RATINGS" table of the official datasheet. It also handles 75 A (10×360 µs) and 50 A (10×560 µs) waveforms required by the same standard. These ratings are validated under pulsed test conditions with cooling intervals between polarity tests, per Note 4 in the datasheet.

What is the thermal resistance and maximum junction temperature for the NTVB065NSA-L?

The NTVB065NSA-L has a thermal resistance of 90°C/W (Junction-to-Ambient) when mounted on a 3″×4.5″ FR4 PCB with 2 oz copper and fan-out in a 3×3 inch pattern, per EIA/JESD51-3. Its maximum operating junction temperature is +150°C, and storage temperature range is −65°C to +150°C. These values are explicitly listed in the "THERMAL CHARACTERISTICS" section of the onsemi NTVB Series datasheet.

How does the capacitance of the NTVB065NSA-L affect voice-band signal integrity?

The NTVB065NSA-L exhibits 79 pF typical capacitance at 1 MHz and 1 Vrms bias, which remains stable across its operating voltage range. This low value introduces negligible insertion loss (<0.1 dB) and phase shift in 300–3400 Hz voice-band signals, preserving speech quality and modem handshake reliability. Higher-capacitance alternatives (e.g., >200 pF) would degrade echo cancellation and data throughput - a key advantage confirmed in the "CAPACITANCE" table of the datasheet.

Is the NTVB065NSA-L compatible with lead-free reflow soldering processes?

Yes, the NTVB065NSA-L is Pb-free and qualified for lead-free reflow soldering per JEDEC J-STD-020. Its SMB package (Case 403C) supports peak reflow temperatures up to 260°C for 10 seconds, consistent with industry-standard lead-free profiles. The "Pb-Free Package" designation in the ordering information and footnote on page 4 of the datasheet confirms full compliance with RoHS Directive 2011/65/EU and IPC-J-STD-001 requirements.