NXP Semiconductors BTA2008-800D,412

Overview

BTA2008-800D from NXP Semiconductors is a planar passivated 3-quadrant high-commutation triac in TO-92 (SOT54) package, rated for 800 V repetitive peak off-state voltage, 0.8 A RMS on-state current, and 9 A non-repetitive peak on-state current. It delivers very sensitive gate triggering (0.25–5 mA across all quadrants) for direct interfacing with microcontrollers and low-power logic ICs in AC load switching applications.

For engineers reviewing the BTA2008-800D datasheet, BTA2008-800D pinout, BTA2008-800D application, or BTA2008-800D equivalent, key selection criteria include gate sensitivity at elevated temperature, three-quadrant commutation robustness, thermal resistance to lead (60 K/W), and compatibility with inductive loads such as solenoids and small motors without snubber circuits.

Technical Context

The BTA2008-800D uses 3Q (three-quadrant) triggering architecture-excluding quadrant I (T2+, G+) for enhanced noise immunity-while maintaining full gate sensitivity in T2+ G−, T2− G−, and T2− G+ configurations. Its planar passivation ensures voltage ruggedness up to 800 V VDRM and reliable operation at junction temperatures up to 125 °C.

It supports high dVD/dt immunity (200 V/µs at 125 °C) and high commutation capability (dIcom/dt ≥ 0.5 A/ms), enabling stable turn-off under reactive load conditions. Gate trigger voltage remains low (0.2–0.3 V typical at 125 °C), ensuring logic-level compatibility even at elevated temperatures.

Key Specifications

Pinout & Package

Package: TO-92 (SOT54), plastic single-ended leaded through-hole package with 3 leads; body dimensions 4.8 × 5.2 × 14.5 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac switching applications.

Compared with BT134-800D and MAC97A8, the BTA2008-800D offers superior dVD/dt immunity (200 V/µs) and verified commutation performance (0.5 A/ms), making it the preferred choice for noise-prone, inductive-load applications on 230 VAC mains without added protection circuitry.

Availability

BTA2008-800D is available at Aetrix Electronics and suitable for low-power motor controls, solenoid actuation, and white goods auxiliary load switching requiring stable component supply and long-term manufacturability.

Supply support for BTA2008-800D 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The BTA2008-800D belongs to NXP's Hi-Com Triac family, engineered specifically for reliable, logic-compatible AC switching in space-constrained, cost-sensitive embedded systems interfacing with inductive and resistive loads.

FAQ

What is the maximum junction temperature rating for the BTA2008-800D?

The BTA2008-800D has a maximum junction temperature (Tj) rating of 125 °C, as defined in the Absolute Maximum Ratings table. This allows operation in ambient environments up to 70 °C when mounted on a PCB with 4 mm lead length and proper thermal relief, provided the RMS current stays within derated limits per Figure 2. The BTA2008-800D must not exceed this limit to ensure long-term reliability and avoid permanent degradation.

Does the BTA2008-800D support full four-quadrant triggering?

No, the BTA2008-800D is a 3-quadrant triac and does not support triggering in quadrant I (T2+, G+). It operates only in quadrants II (T2+, G−), III (T2−, G−), and IV (T2−, G+), which improves noise immunity by eliminating the most noise-sensitive trigger mode. This behavior is explicitly confirmed in both the General Description and Features sections of the official NXP datasheet for the BTA2008-800D.

Can the BTA2008-800D directly interface with a 3.3 V microcontroller GPIO?

Yes, the BTA2008-800D can be directly driven by a 3.3 V microcontroller GPIO because its gate trigger current (IGT) is as low as 0.25 mA across all supported quadrants at 25 °C-and remains ≤5 mA even at 125 °C. With typical VGT of 0.3 V at high temperature, the GPIO only needs to sink ~0.5 mA to reliably trigger the BTA2008-800D, well within standard MCU output capability. No series resistor or level-shifting circuit is required.

What is the thermal resistance from junction to ambient for the BTA2008-800D?

The BTA2008-800D has a junction-to-ambient thermal resistance (Rth(j-a)) of 150 K/W when mounted on a standard PCB with 4 mm lead length. This value assumes natural convection cooling and no copper pour or heatsinking. For higher-power operation, designers should use the lower junction-to-lead resistance (Rth(j-lead) = 60 K/W) and route heat through leads to external copper areas or chassis connections to maintain safe junction temperature.

Is the BTA2008-800D suitable for driving inductive loads like AC solenoids?

Yes, the BTA2008-800D is specifically designed for inductive loads: its datasheet specifies dIcom/dt ≥ 0.5 A/ms and high commutation capability, validated under 400 V, 0.8 A RMS conditions at 125 °C. This ensures reliable turn-off without commutation failure-even with solenoids exhibiting high back-EMF-eliminating the need for external snubbers in many low-power cases. The BTA2008-800D meets these requirements without derating.