NXP Semiconductors BT1306-600D,412

Overview

BT1306-600D from NXP Semiconductors is a logic-level sensitive-gate triac designed for direct interfacing with microcontrollers and low-power gate drive circuits. It supports bidirectional AC switching up to 600 V repetitive peak off-state voltage (VDRM), delivers 0.6 A RMS on-state current (IT(RMS)), and features four-quadrant gate sensitivity for reliable triggering across all conduction modes - used in solid-state relays and low-power AC fan speed control.

For engineers reviewing the BT1306-600D datasheet, BT1306-600D pinout, BT1306-600D application, or BT1306-600D equivalent, key selection criteria include gate trigger current (IGT ≤ 5 mA in T2+G+ quadrant), holding current (IH ≤ 10 mA), dVD/dt immunity (≥45 V/μs), and TO-92 (SOT54) through-hole package compatibility with thermal resistance Rth(j-lead) ≤ 60 K/W.

Technical Context

The BT1306-600D operates as a bidirectional thyristor with sensitive gate structure enabling triggering with ≤5 mA gate current in all four quadrants. Its design supports phase-controlled AC power regulation without external amplification, leveraging low IGT and sub-2 V gate trigger voltage (VGT ≤ 2 V).

It sustains non-repetitive surge currents up to 8.8 A (16.7 ms, 50 Hz), withstands junction temperatures from −40 °C to +125 °C, and maintains off-state leakage ID ≤ 100 μA at 110 °C - making it suitable for thermally constrained consumer and industrial control environments.

Key Specifications

Pinout & Package

BT1306-600D uses the TO-92 (SOT54) plastic single-ended leaded through-hole package - compact, cost-effective, and compatible with standard wave-soldering processes. Lead spacing is 2.54 mm (e), body dimensions are 4.8 × 4.2 × 5.2 mm (D × E × A), and maximum lead length is 14.5 mm (L).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BT1306-600D, BT136-600D offers higher current capacity at the cost of gate drive overhead, while MAC97A6 trades dv/dt robustness for marginally improved RMS rating - BT1306-600D remains optimal for logic-level MCU-driven, noise-immune, low-RMS (<0.6 A) AC switching.

Availability

BT1306-600D is available at Aetrix Electronics and suitable for solid-state relays, AC fan speed controllers, and phase-controlled lighting requiring stable component supply, long-term manufacturability, and consistent parametric performance across production batches.

Supply support for BT1306-600D 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 IoT applications.

The BT1306-600D belongs to NXP's logic-level triac product line, engineered specifically for direct microcontroller interfacing in cost-sensitive, low-power AC control systems - emphasizing gate sensitivity, thermal efficiency, and robust transient immunity.

FAQ

What is the maximum junction temperature specification for BT1306-600D?

The BT1306-600D has a maximum junction temperature (Tj) rating of +125 °C, with a minimum of −40 °C. This range supports operation in consumer and industrial ambient environments. Derating of IT(RMS) is required above Tlead = 65 °C per Figure 1 in the datasheet, and thermal design must ensure Rth(j-lead) ≤ 60 K/W is maintained to avoid exceeding Tj under load. The BT1306-600D must not be operated beyond this limit to prevent permanent degradation.

Can BT1306-600D be driven directly by a 3.3 V microcontroller GPIO?

Yes, BT1306-600D can be driven directly by a 3.3 V microcontroller GPIO. Its gate trigger voltage (VGT) is ≤2 V in the T2+G+ quadrant, and gate trigger current (IGT) is ≤5 mA - well within typical GPIO sourcing capability (e.g., STM32 or ESP32 pins). A series current-limiting resistor (e.g., 220 Ω) is recommended to keep gate power within PGM ≤ 5 W peak and PG(AV) ≤ 0.1 W. The BT1306-600D's four-quadrant sensitivity ensures reliable turn-on even with marginal drive conditions.

What is the off-state leakage current of BT1306-600D at elevated temperature?

The off-state leakage current (ID) of BT1306-600D is specified as ≤100 μA at VD = VDRM(max) and Tj = 110 °C. At 25 °C, ID is typically <3 μA. This low leakage ensures minimal power loss and avoids false triggering in high-impedance control circuits. The BT1306-600D maintains this performance across its full operating temperature range, supporting reliable blocking in mains-connected applications.

Does BT1306-600D require a heatsink in typical applications?

No, BT1306-600D does not require an external heatsink in typical applications. With IT(RMS) = 0.6 A and Rth(j-lead) ≤ 60 K/W, thermal dissipation occurs efficiently through the TO-92 leads into the PCB copper. When mounted on a standard FR-4 board with 4 mm lead length and Tlead ≤ 65 °C, junction temperature remains within limits. The BT1306-600D's design intentionally targets self-cooled operation in low-power AC switching roles like fan control and SSRs.

How does BT1306-600D differ from BT1306-400D?

The BT1306-600D and BT1306-400D share identical package (TO-92/SOT54), pinout, gate characteristics (IGT, VGT, IH), and thermal specs - differing only in repetitive peak off-state voltage: BT1306-600D is rated for 600 V VDRM, while BT1306-400D is rated for 400 V. This makes BT1306-600D suitable for 230 VAC mains with safety margin, whereas BT1306-400D is limited to 115 VAC or lower-voltage AC systems. All other parameters of the BT1306-600D remain unchanged versus the -400D variant.