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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

NXP Semiconductors OT406,135

Name: OT406,135
Brand: NXP Semiconductors
SKU: OT406,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: OT406,135

Manufacturer:: NXP Semiconductors

Category:: TRIACs

Package:: -

Datasheet:: OT406,135.pdf

Description:: TRIAC SC73

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Product details

Overview

OT406,135 from NXP Semiconductors is a passivated sensitive-gate four-quadrant triac in SOT223 surface-mount package, rated for 600 V repetitive peak off-state voltage (V_DRM), 1 A RMS on-state current (I_T(RMS)), and ≤3 mA gate trigger current (I_GT) in three quadrants-designed for low-power AC load switching in home appliances and industrial process control.

For engineers reviewing the OT406,135 datasheet, OT406,135 pinout, OT406,135 application, or OT406,135 equivalent, this device supports direct logic-level interfacing, delivers enhanced noise immunity, and operates reliably under voltage transients up to 600 V with thermal resistance R_th(j-sp) = 15 K/W for solder-point cooling.

Technical Context

The OT406,135 implements a four-quadrant triggering architecture enabling gate control with both polarities of main terminal voltage (T2±) and gate signal (G±), with quadrant-specific I_GT ≤3 mA (T2+G+, T2+G−, T2−G−) and ≤5 mA (T2−G+). Its dV/dt immunity is rated at ≥10 V/µs under worst-case conditions (V_DM = 0.67V_DRM, T_j = 110 °C, gate open).

Static conduction is characterized by V_T = 1.3–1.6 V at I_T = 1 A, holding current I_H ≤7 mA, and latching current I_L ≤20 mA (T2+G−), supporting robust turn-on and stable hold under low-current AC loads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM	600 V - blocks full-wave AC line voltage up to 424 V RMS without conduction
I_T(RMS)	1 A - supports continuous AC load current up to 120 W at 120 VAC
I_GT	≤3 mA (T2+G+, T2+G−, T2−G−) - enables direct drive from microcontroller GPIO or low-power logic ICs
I_TSM	12.5 A (20 ms) - withstands short-duration motor startup surges or inrush currents
R_th(j-sp)	15 K/W - allows thermal management via PCB copper pad without external heatsink for ≤0.8 W dissipation
dV/dt	≥10 V/µs - prevents false triggering from fast-rising noise transients on AC mains
V_T	1.3–1.6 V @ 1 A - limits conduction loss to ≤1.6 W at full RMS current

Pinout & Package

SOT223 (SC-73) plastic surface-mounted package with 4 leads and integrated heatsink pad; mounting base (Pin 4) is electrically connected to main terminal 2 (T2), enabling low-thermal-resistance PCB mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Main Terminal 1 (T1)	AC load return path; connects to one side of AC load and neutral/line depending on circuit topology
2	Main Terminal 2 (T2)	AC line input path; shares internal connection with Pin 4 (mounting base) for thermal and electrical continuity
3	Gate (G)	Four-quadrant trigger input; accepts positive or negative pulses relative to T2 for full-cycle control
4	Mounting Base / T2	Electrically tied to T2; provides mechanical anchoring and thermal conduction to PCB copper area

Key Features

Feature	Design Value
Four-quadrant triggering	Enables gate control with any polarity combination of T2 and G, eliminating need for external diodes or polarity conditioning circuits
Sensitive gate (I_GT ≤3 mA)	Reduces drive circuit power consumption and simplifies interface design with 3.3 V or 5 V logic outputs
Enhanced noise immunity	Combines high dV/dt rating (≥10 V/µs) and optimized gate structure to suppress false triggering in EMI-prone environments
Passivated die construction	Improves long-term reliability under humid or contaminated operating conditions without hermetic sealing
SOT223 thermal performance	R_th(j-sp) = 15 K/W enables >0.8 W power dissipation using standard FR4 PCB copper area per Figure 14

Applications

Home Appliances	Low-Power Motor Control
Use Scenario: Solid-state replacement of electromechanical relays in washing machine timers, dishwasher heating cycles, and microwave oven interlocks. IC Role / Device Role / Timing Role: AC load switch controlling resistive or lightly inductive loads up to 120 W. Use Value: Eliminates contact wear and audible click; supports zero-crossing compatible dimming or phase-angle control when paired with appropriate gate driver.	Use Scenario: Speed regulation of small universal motors in power tools, fans, and blenders using phase-controlled AC supply. IC Role / Device Role / Timing Role: Bidirectional AC power switch synchronized to line zero-crossing for smooth torque delivery. Use Value: Enables compact, low-cost speed control without requiring isolated gate drivers or snubbers due to inherent four-quadrant sensitivity and dV/dt immunity.
Industrial Process Control	AC Fan Speed Controllers
Use Scenario: On/off control of solenoid valves, indicator lamps, and small heaters in PLC I/O modules and sensor interface boards. IC Role / Device Role / Timing Role: Isolated AC output stage driven directly from optocoupler or logic-level output. Use Value: Reduces BOM count by removing discrete buffer transistors; maintains stable operation across wide temperature range (−40 °C to +125 °C junction).	Use Scenario: Variable-speed ventilation systems in HVAC ducts, server racks, and medical equipment enclosures. IC Role / Device Role / Timing Role: Phase-angle modulated AC switch delivering adjustable RMS voltage to shaded-pole or PSC fan motors. Use Value: Achieves quiet, stepless speed adjustment with <1 mA average gate drive current and no external heat sinking required.

Home Appliances

Low-Power Motor Control

Use Scenario: Solid-state replacement of electromechanical relays in washing machine timers, dishwasher heating cycles, and microwave oven interlocks.

IC Role / Device Role / Timing Role: AC load switch controlling resistive or lightly inductive loads up to 120 W.

Use Value: Eliminates contact wear and audible click; supports zero-crossing compatible dimming or phase-angle control when paired with appropriate gate driver.

Use Scenario: Speed regulation of small universal motors in power tools, fans, and blenders using phase-controlled AC supply.

IC Role / Device Role / Timing Role: Bidirectional AC power switch synchronized to line zero-crossing for smooth torque delivery.

Use Value: Enables compact, low-cost speed control without requiring isolated gate drivers or snubbers due to inherent four-quadrant sensitivity and dV/dt immunity.

Industrial Process Control

AC Fan Speed Controllers

Use Scenario: On/off control of solenoid valves, indicator lamps, and small heaters in PLC I/O modules and sensor interface boards.

IC Role / Device Role / Timing Role: Isolated AC output stage driven directly from optocoupler or logic-level output.

Use Value: Reduces BOM count by removing discrete buffer transistors; maintains stable operation across wide temperature range (−40 °C to +125 °C junction).

Use Scenario: Variable-speed ventilation systems in HVAC ducts, server racks, and medical equipment enclosures.

IC Role / Device Role / Timing Role: Phase-angle modulated AC switch delivering adjustable RMS voltage to shaded-pole or PSC fan motors.

Use Value: Achieves quiet, stepless speed adjustment with <1 mA average gate drive current and no external heat sinking required.

Equivalent & Alternatives

The following parts are listed as comparable options for similar four-quadrant triac applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BT134-600D,127	Same SOT223 package, but I_GT = 5 mA (max) and V_DRM = 600 V; lower dV/dt rating (≥5 V/µs)	Less suitable for noisy industrial mains; requires stronger gate drive or RC snubber in high-dV/dt environments	Select BT134-600D,127 only if gate drive capability exceeds 5 mA and system EMI is well-controlled.
MAC97A6	TO-92 package, I_GT ≤5 mA, V_DRM = 600 V, R_th(j-a) = 70 K/W (typ); no integrated heatsink pad	Requires external heatsink for >0.3 W dissipation; incompatible with automated SMT assembly	Choose MAC97A6 only for through-hole prototyping or low-volume legacy designs where thermal load is minimal.

Compared with BT134-600D,127 and MAC97A6, the OT406,135 offers superior noise immunity (dV/dt ≥10 V/µs), lower gate drive demand (≤3 mA), and optimized SMT thermal performance (R_th(j-sp) = 15 K/W), making it preferred for space-constrained, high-reliability AC control in modern consumer and industrial electronics.

Availability

OT406,135 is available at Aetrix Electronics and suitable for home appliance control, low-power motor drives, and industrial process control applications requiring stable component supply, long-lifecycle support, and RoHS-compliant SMT packaging.

Supply support for OT406,135 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 OT406,135 belongs to NXP's legacy discrete power portfolio, engineered specifically for cost-sensitive, high-volume AC switching applications demanding robust four-quadrant operation and SMT manufacturability.

FAQ

What is the maximum RMS on-state current rating for OT406,135?

The OT406,135 has an I_T(RMS) rating of 1 A under full sine-wave conditions with solder point temperature ≤103 °C. This corresponds to continuous power handling of approximately 0.8 W at 1 A with V_T ≈ 1.3–1.6 V, verified per Figure 1 and Table 3 in the NXP datasheet Rev. 01.

Does OT406,135 support all four triggering quadrants?

Yes, OT406,135 is explicitly specified as a four-quadrant triac. Gate triggering is supported in T2+G+, T2+G−, T2−G−, and T2−G+ modes, with I_GT ≤3 mA in the first three quadrants and ≤5 mA in T2−G+, as confirmed in Table 5 of the official NXP datasheet.

What is the thermal resistance from junction to solder point for OT406,135?

The OT406,135 has a maximum R_th(j-sp) of 15 K/W, measured under full-cycle conditions per Figure 6 and Table 4. This value assumes proper PCB copper pad layout per Figure 14 (7 mm × 15 mm minimum), enabling efficient heat transfer from the SOT223 mounting base (Pin 4) to the board.

Can OT406,135 be driven directly by a 3.3 V microcontroller GPIO?

Yes, OT406,135 can be driven directly by a 3.3 V microcontroller GPIO because its maximum gate trigger current is 3 mA (in three quadrants) and gate trigger voltage is ≤1.3 V (V_GT), allowing reliable turn-on with series resistors as low as 1 kΩ while staying within safe I/O current limits.

What is the blocking voltage rating of OT406,135?

The OT406,135 has a repetitive peak off-state voltage (V_DRM) and repetitive peak reverse voltage (V_RRM) rating of 600 V each, as specified in Table 3 of the NXP datasheet. This allows safe operation on 230 VAC mains with margin for transient overvoltages.

OT406,135 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Triac Type:: -

Voltage - Off State:: -

Current - On State (It (RMS)) (Max):: -

Voltage - Gate Trigger (Vgt) (Max):: -

Current - Non Rep. Surge 50, 60Hz (Itsm):: -

Current - Gate Trigger (Igt) (Max):: -

Current - Hold (Ih) (Max):: -

Configuration:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

OT406,135 FAQ

1.How can I place an order for OT406,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for OT406,135 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 OT406,135 reliable?

The price and inventory of OT406,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OT406,135 is usually 5 days.

3.What payment methods are accepted for OT406,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OT406,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for OT406,135?

OT406,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your OT406,135 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 OT406,135?

For technical support, including OT406,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OT406,135 requirements.

6.How does Aetrix verify that OT406,135 is sourced from the original manufacturer or authorized distributors?

All OT406,135 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 OT406,135 meets industry standards.

7.What is the process for return or replacement of OT406,135?

All OT406,135 units undergo pre-shipment inspection (PSI). If there is an issue with OT406,135, 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 OT406,135 part is unused and in its original packaging.

Return procedure for OT406,135:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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