BT134-600D,127 - 600V 4A Logic-Level TRIAC SOT-82 | WeEn
Teilenummer: BT134-600D,127 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.45 | $0,45 |
| 10 | $0.38 | $3,80 |
| 100 | $0.3 | $30,00 |
| 500 | $0.25 | $125,00 |
| 1.000 | $0.22 | $220,00 |
BT134-600D,127 Übersicht
A TRIAC (TRIode for Alternating Current) is a bidirectional semiconductor switch belonging to the thyristor family. Internally equivalent to two back-to-back SCRs with a shared gate, a TRIAC conducts in both halves of the AC waveform once triggered, making it the workhorse device for low-to-medium-power AC load control. Within the broader semiconductor taxonomy, the TRIAC sits as a sub-category of thyristors, which are themselves members of the power-management discrete-semiconductor family used wherever AC mains must be switched or phase-controlled. The BT134 series targets sub-10 A applications where sensitive-gate triggering simplifies interface design.
Key specifications include 4 A continuous RMS on-state current, 27 A non-repetitive surge current (ITSM) for half-cycle transients, 600 V repetitive peak off-state voltage, 1.5 V maximum gate trigger voltage, 10 mA maximum gate trigger current, and 5 W maximum power dissipation. The planar passivated glass junction construction provides long-term stability and high dv/dt immunity, while the SOT-82 through-hole package offers robust mechanical mounting suitable for PCB designs and clip-mount heatsinks in appliance and industrial control environments.
Typical applications include low-power AC lamp dimmers, fan motor speed controllers, solenoid drivers, and small appliance heater controls. The logic-level gate sensitivity allows direct microcontroller interfacing in solid-state relay (SSR) input stages, eliminating the need for gate-driver transistors or pulse transformers. Its four-quadrant triggering capability ensures reliable operation in phase-control circuits regardless of load polarity or trigger mode (I, II, III, IV).
A primary design consideration is thermal management: at full 4 A RMS conduction, total power dissipation reaches approximately 5 W, requiring the SOT-82 tab to be soldered to a minimum 50 mm x 50 mm copper land or a clip-on heatsink to maintain junction temperature below 125 degrees C. A snubber RC network (typically 100 ohm + 100 nF) across MT1-MT2 is recommended for inductive loads to prevent false triggering from dv/dt transients.
This page synthesizes distributor pricing, SOT-82 drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in-Alternativen für BT134-600D,127 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
BT134-600D
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
BT134-600E,127
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
BT134-600G,127
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
BT134W-600D
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
BT134-800E
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
BT134-600D,127 Grenzwerte & elektrische Eigenschaften
| TRIAC Type | Logic - Sensitive Gate, 4-Quadrant |
| Configuration | Single |
| Voltage - Off State (VDRM) | 600 V |
| Current - On State (IT(RMS)) Max | 4 A |
| Current - Non-Repetitive Surge (ITSM) | 27 A (50/60 Hz half-cycle) |
| Voltage - Gate Trigger (VGT) Max | 1.5 V |
| Current - Gate Trigger (IGT) Max | 10 mA |
| Power Dissipation (Ptot) Max | 5 W |
| Gehäuse | SOT-82-3 (through-hole, 3 leads) |
| Betriebstemperatur | -40 C to +125 C |
| Montageart | Through-Hole |
| Triggering Quadrants | I, II, III, IV (all four) |
| RoHS-Status | Compliant |
| Manufacturing Process | Planar passivated, glass junction |
BT134-600D,127 Pin-Konfiguration
| Pin 1 | MT1 — Main Terminal 1 (anode/cathode of internal SCR pair) |
| Pin 2 | MT2 — Main Terminal 2 (anode/cathode of internal SCR pair, internally connected to metal tab) |
| Pin 3 | G — Gate (trigger input) |
Typische Anwendungen
BT134-600D,127 ist geeignet für 6 Anwendungs: Low-Power AC Lamp Dimmer, AC Fan Motor Speed Controller, Solid-State Relay (SSR) Input Stage, Small Appliance Heater Control, Solenoid and Valve Driver, Universal Motor Speed Control.
Low-Power AC Lamp Dimmer
The BT134-600D,127 is well-suited for low-power AC lamp dimmer circuits operating from 110-240 VAC mains, controlling incandescent or halogen lamp loads up to approximately 500 W at 230 VAC (4 A RMS). Its 1.5 V VGT and 10 mA IGT enable direct microcontroller phase-angle control at the zero-crossing point, eliminating external gate-driver transistors. The 600 V VDRM provides a 2x safety margin over typical 240 VAC peak (340 V), allowing reliable operation across global mains standards. Designers should include a 100 ohm + 100 nF snubber across MT1-MT2 to suppress dv/dt-induced false triggering, and ensure the SOT-82 tab is soldered to at least 50 mm x 50 mm copper pour for thermal dissipation at high conduction angles.
Empfohlen
AC Fan Motor Speed Controller
In shaded-pole and permanent-split-capacitor (PSC) AC fan motor speed controllers, the BT134-600D,127 serves as the phase-control switching element for 120/230 VAC motor loads up to 4 A RMS. Its four-quadrant triggering (modes I, II, III, IV) eliminates motor-stall dead bands that plague TRIACs with limited quadrant operation, while the 27 A ITSM rating handles motor-start inrush transients. The logic-level gate sensitivity allows direct PWM-to-phase-angle conversion in microcontroller-based fan speed control loops. Recommended PCB layout places the gate trace away from MT1-MT2 high-current paths and includes an MOV (typically 275 V rated) across the load for transient protection.
Empfohlen
Solid-State Relay (SSR) Input Stage
In solid-state relay (SSR) zero-cross or random-fire input stages, the BT134-600D,127 functions as the output switching TRIAC driven by an optocoupler-isolated gate signal. Its 1.5 V VGT allows direct triggering from typical optocoupler output stages (e.g., MOC3021, MOC3041), simplifying SSR design and reducing component count. The SOT-82 through-hole package supports PCB-mount SSR modules in industrial control formats. Four-quadrant triggering ensures symmetrical switching for both AC half-cycles, critical for resistive heating loads. For designs requiring higher isolation voltage, a separate driver TRIAC plus main-switch TRIAC architecture may be preferred; the BT134-600D,127 fits both single-TRIAC and snubber-less SSR topologies with appropriate gate resistor sizing.
Empfohlen
Small Appliance Heater Control
For heating elements in small appliances (coffee makers, space heaters, kettles, toasters) operating from 120/230 VAC mains, the BT134-600D,127 controls resistive heating loads up to approximately 4 A RMS (roughly 920 W at 230 VAC or 480 W at 120 VAC). Its 600 V VDRM comfortably exceeds the peak mains voltage, and the planar passivated junction provides long-term thermal cycling stability for the millions of ON/OFF cycles typical of thermostat-controlled appliances. The logic-level gate interface supports direct digital thermostat control from a microcontroller or dedicated thermostat IC. Heatsinking via the SOT-82 tab is recommended; for sustained high-duty-cycle operation, derate to 3 A RMS with adequate copper area.
Empfohlen
Solenoid and Valve Driver
The BT134-600D,127 drives 110/230 VAC solenoid valves, water valves, and gas valves in appliance and industrial control systems. Its 4 A RMS rating covers most fractional-HVAC solenoid loads, and the 27 A surge rating handles the inrush of solenoid energization. The four-quadrant gate triggering supports both DC-biased and AC-only trigger circuits, simplifying the interface to PLC outputs or microcontroller GPIO. An RC snubber (100 ohm + 100 nF) is essential across MT1-MT2 to absorb the inductive kickback from solenoid coil turn-off; without it, dv/dt transients can falsely retrigger the TRIAC. The SOT-82 package is well-suited to PCB-mount valve-driver boards.
Empfohlen
Universal Motor Speed Control
For series-wound universal motors (used in power tools, blenders, vacuum cleaners) controlled by phase-angle TRIAC circuits, the BT134-600D,127 provides cost-effective speed regulation up to 4 A RMS. Universal motors present highly inductive loads with significant commutation noise; the BT134-600D,127 logic-level gate sensitivity allows trigger pulse shaping to maintain reliable commutation through zero-crossing. The 27 A ITSM rating covers the inrush at motor start, while the four-quadrant triggering avoids commutation-related dead zones. For higher-power tools exceeding 4 A, designers should migrate to the BT136-600D (TO-220) or BT138-600D family in the same electrical family.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für BT134-600D,127 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | BT134-600D | BT134-600E,127 | BT134-600G,127 | BT134W-600D | BT134-800E |
|---|---|---|---|---|---|---|
| Package | SOT-82-3 | SOT-82-3 - same | SOT-82-3 - same | SOT-82-3 - same | SOT-82-3 - same | SOT-82-3 - same |
| Brand | WeEn Semiconductors | WeEn Semiconductors | WeEn Semiconductors | WeEn Semiconductors | WeEn Semiconductors | WeEn Semiconductors |
| VDRM (Off-State Voltage) | 600 V | 600 V | 600 V | 600 V | 600 V | 800 V |
| IT(RMS) (On-State Current) | 4 A | 4 A | 4 A | 4 A | 4 A | 4 A |
| VGT Max (Gate Trigger Voltage) | 1.5 V | 1.5 V | 1.5 V | 1.5 V | 1.5 V | 1.5 V |
| IGT Max (Gate Trigger Current) | 10 mA | 10 mA | 25 mA | 50 mA | 10 mA | 25 mA |
| ITSM (Surge Current) | 27 A | 27 A | 27 A | 27 A | 27 A | 27 A |
| Ptot Max (Power Dissipation) | 5 W | 5 W | 5 W | 5 W | 5 W | 5 W |
Wichtigste Unterscheidungsmerkmale
- Logic-level gate sensitivity (VGT 1.5 V, IGT 10 mA) (vs. BT134-600E,127)
- Lower IGT vs higher-IGT series D variants (vs. BT134-600G,127)
- 600 V VDRM optimized for global mains standards (vs. BT134-800E)
Designhinweise
Estimated: At full 4 A RMS continuous conduction with sinusoidal waveform, the BT134-600D,127 dissipates approximately 1.5 W average assuming on-state voltage drop of 1.5 V. At higher conduction angles or DC-like loads (e.g., phase-controlled near 180 degrees), dissipation approaches the 5 W limit. The SOT-82 tab must be soldered to a copper land of at least 50 mm x 50 mm on FR4 PCB to maintain junction temperature below 125 C. Without thermal management, derate to approximately 2 A RMS maximum.
The SOT-82 package tab is internally connected to MT2 (Main Terminal 2), so the heatsink copper land is electrically live at mains potential when the TRIAC conducts. Route the gate trace (Pin 3) away from MT1/MT2 high-current paths to minimize capacitive coupling that could cause dv/dt false triggering. Place the gate resistor (typically 100-470 ohm) close to Pin 3. Keep the snubber RC network (100 ohm + 100 nF) physically compact and as close to MT1-MT2 as possible for effective dv/dt suppression.
Three common pitfalls when designing with the BT134-600D,127: (1) omitting the RC snubber across MT1-MT2 with inductive loads, leading to false retriggering; (2) driving the gate directly from a low-impedance source without a series resistor, which can damage the gate junction; (3) using the SOT-82 package without adequate copper heatsinking at sustained loads above 2 A RMS. Always include a 100-470 ohm gate resistor and verify junction temperature under worst-case phase-angle conduction.
The logic-level gate sensitivity (VGT 1.5 V, IGT 10 mA) of the BT134-600D,127 makes it susceptible to dv/dt-induced false triggering in noisy environments. For reliable operation with highly inductive loads (solenoids, motors, transformers), use a snubber with Rsnub = 100 ohm and Csnub = 100 nF across MT1-MT2, or select the higher-IGT BT134-600E (25 mA) or BT134-600G (50 mA) variant. The four-quadrant triggering capability is robust, but mode-I triggering (MT2+, G+) typically requires the lowest IGT and is preferred for microcontroller-driven circuits.
Compliance-Informationen
RoHS and REACH compliant per WeEn product documentation. Not AEC-Q100 qualified (not intended for automotive use). Lead-free and halogen-free per modern WeEn manufacturing standards. Originally a NXP Semiconductors part (Bipolar Power portfolio transferred to WeEn Semiconductors joint venture in November 2015).
