BTA425Y-800BT - 25A 800V 3Q Hi-Com Triac, TO-220AB | WeEn
Артикул: BTA425Y-800BT ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.84 | $184,00 |
| 500 | $1.52 | $760,00 |
| 1.000 | $1.28 | $1.280,00 |
BTA425Y-800BT Обзор
A Triac is a bidirectional thyristor that integrates two SCR structures in anti-parallel within a single die, allowing AC load control with a single gate terminal. Triacs sit within the thyristor family -> power semiconductors -> discrete semiconductors. Three-quadrant (3Q) Triacs are an evolution of the classic four-quadrant (4Q) Triac: they retain triggering in quadrants I (MT2+, gate+), II (MT2+, gate-) and III (MT2-, gate+), but deliberately disable quadrant IV (MT2-, gate-), which is the operating region most susceptible to false triggering from high dV/dt or commutating dI/dt on AC mains. Snubberless 3Q parts are widely deployed in motor drives, solid-state relays, heating regulators and AC phase-control dimmers.
Key features of the BTA425Y-800BT include 800 V repetitive peak off-state voltage (VDRM), 25 A RMS on-state current (IT(RMS)), a high static dV/dt rating, a non-insulated tab variant, and planar passivated die technology for stable leakage and high-temperature operation. The device is suitable for high static and dynamic dV/dt and high dI/dt circuits, and operates across the standard -40 °C to +150 °C junction-temperature range demanded by industrial motor and heater applications.
The BTA425Y-800BT is part of WeEn's BT series, characterized by the same die and identical TO-220AB (SOT78D) pinout across voltage grades. Voltage classes in the family include 600 V (BTA425Y-600B), 800 V (BTA425Y-800B) and 1000 V (BTA425Y-1000B), giving designers a scalable platform where PCB layout can stay constant while only the VDRM rating changes. The 800 V grade covers universal 230 V AC mains with generous transient margin.
Typical applications include solid-state relays (SSR), AC motor soft-start and reversing controls, heating regulation (HVAC, induction cookers, soldering stations), professional phase-angle dimmers, and universal-motor speed controllers in power tools and white goods. The 25 A RMS rating also enables direct drive of small compressors and pumps without an interposing relay.
When designing with this part, observe the thermal resistance of the TO-220AB package and provide an adequate heatsink for currents above ~10 A continuous. Place the gate resistor (typically 100 Ω to 330 Ω) close to the MT1/G pin to limit di/dt into the gate, and keep the gate-MT1 loop short to minimize noise pickup that could otherwise cause unwanted firing.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated in the WeEn datasheet alone.
Аналоги без доработки для BTA425Y-800BT — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
BTA425Y-800BTQ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
BTA425Y-600BT
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
BTA425Y-1000BT
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
BTA425Y-800B
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
BTA425Y-800BT-NXP
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
BTA425Y-800BT Характеристики
| Product Type | 3Q Hi-Com Triac (Snubberless, Three-Quadrant) |
| Repetitive Peak Off-State Voltage (VDRM) | 800 V |
| RMS On-State Current (IT(RMS)) | 25 A |
| Triggering Quadrants | I, II, III (3Q - quadrant IV disabled) |
| Commutation | Series BT - snubberless at full IT(RMS) and Tj(max) |
| Maximum Junction Temperature (Tj max) | 150 °C |
| Диапазон рабочей температуры перехода | -40 °C to +150 °C |
| Корпус | TO-220AB (SOT78D) - internally insulated |
| Тип монтажа | Through Hole |
| Число выводов | 3 (MT1, MT2, Gate) |
| Technology | Planar passivated |
| Static dV/dt | High (per 3Q Hi-Com series) |
| Статус RoHS | Compliant |
| Lead-Free | Yes |
Конфигурация выводов BTA425Y-800BT
| Контакт 1 | MT1 — Main Terminal 1 (anode 1 / bidirectional load terminal) |
| Контакт 2 | MT2 — Main Terminal 2 (anode 2 / bidirectional load terminal) |
| Контакт 3 | GATE — Trigger gate for quadrants I, II and III (3Q Hi-Com Triac) |
| Контакт TAB | TAB (isolated) — Thermal pad - electrically isolated from MT2; bolt to heatsink |
On-State Surge Current vs Number of Cycles (ITSM)
Типичное применение
BTA425Y-800BT подходит для 6 применениеs: Solid-State Relay (SSR) for AC Loads, AC Motor Soft-Start and Reversing Control, Heating Regulation (HVAC, Induction Cookers), Professional Phase-Angle Dimmer, Universal-Motor Speed Controller (Power Tools, White Goods), Compressor and Pump Driver Module.
Solid-State Relay (SSR) for AC Loads
The BTA425Y-800BT's 25 A RMS continuous current rating and 800 V VDRM make it well suited for solid-state relay outputs that switch 230 V AC industrial loads such as heaters, lamps, and solenoids. Its 3Q Hi-Com design suppresses false triggering in quadrant IV, which is the region most exposed to AC-line dV/dt transients and back-EMF from inductive loads, so the part can switch the load directly without an RC snubber network. WeEn datasheet Rev.03 confirms snubberless commutation at full RMS current with Tj(max) = 150 °C, which simplifies the SSR BOM and reduces long-term failure modes tied to snubber capacitor aging.
Рекомендуется
AC Motor Soft-Start and Reversing Control
Universal and induction motors benefit from phase-angle or burst-fire soft-start controllers built around the BTA425Y-800BT. The 800 V VDRM provides ample margin for 230 V AC mains with inductive kick, and the 25 A RMS rating covers fractional-horsepower motors up to ~3 kW without an interposing contactor. Series-BT 3Q commutation lets the Triac recover safely at high di/dt without an RC snubber, reducing PCB area and BOM cost in white-goods and power-tool drives. Pair the Triac with a small DSP or MCU for closed-loop speed control.
Рекомендуется
Heating Regulation (HVAC, Induction Cookers)
In HVAC duct heaters, soldering stations and induction-cooker power stages, the BTA425Y-800BT delivers precise phase-angle control of resistive heating elements at currents up to 25 A RMS. The high 150 °C Tj(max) allows continuous operation in confined, high-temperature enclosures without thermal shutdown, and the 3Q Hi-Com commutation prevents nuisance tripping under the high di/dt generated by zero-voltage-switched heater stages. The internally insulated TO-220AB (SOT78D) tab mounts directly to a chassis or heatsink without an insulating pad, simplifying mechanical assembly in consumer heating appliances.
Рекомендуется
Professional Phase-Angle Dimmer
Phase-angle dimmers for stage lighting and architectural dimming stacks require a robust Triac that can commutate high di/dt loads (low-voltage transformers, electronic low-V transformers, LED driver inputs) without latch-up. The BTA425Y-800BT's series-BT 3Q design is specifically characterised for these inductive and capacitive-leading-edge loads, and the 800 V rating handles 230 V AC mains with generous transient margin. The planar passivated die gives stable leakage at high temperature, important in dimmer racks where multiple Triacs run hot continuously. Use a diac (e.g., DB3) or a programmable MCU for symmetric firing.
Рекомендуется
Universal-Motor Speed Controller (Power Tools, White Goods)
Vacuum cleaners, hand mixers and small universal-motor drives use a Triac for low-cost speed control. The BTA425Y-800BT handles the inductive kickback of brushed universal motors at 25 A RMS and 800 V, while the 3Q triggering architecture rejects the high dV/dt noise that brushed motors inject back into the AC line. Snubberless operation reduces component count and improves long-term reliability, both critical for consumer appliances with 10+ year service life requirements. The TO-220AB (SOT78D) insulated tab simplifies thermal integration into plastic-housed appliances.
Рекомендуется
Compressor and Pump Driver Module
Small single-phase compressors and water pumps for HVAC and appliance use can be switched directly by the BTA425Y-800BT at 25 A RMS, eliminating an interposing electromechanical relay. The 800 V repetitive peak rating tolerates the inductive overshoot from compressor windings, and the 150 °C Tj(max) sustains operation in the warm compressor-compartment environment. Series-BT 3Q Hi-Com commutation ensures reliable turn-off at high dI/dt without a snubber, which is critical for compressor loads that demand clean zero-crossing behaviour. The TO-220AB (SOT78D) package bolts to a small heatsink or the chassis.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для BTA425Y-800BT — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | BTA425Y-800BTQ | BTA425Y-600BT | BTA425Y-1000BT | BTA425Y-800B | BTA425Y-800BT-NXP |
|---|---|---|---|---|---|---|
| Package | TO-220AB (SOT78D) - insulated | TO-220AB (SOT78D) - insulated | TO-220AB (SOT78D) - insulated | TO-220AB (SOT78D) - insulated | TO-220AB (SOT78D) - insulated | TO-220AB (SOT78D) - insulated |
| Brand | WeEn Semiconductors | WeEn Semiconductors | WeEn Semiconductors | WeEn Semiconductors | WeEn Semiconductors | NXP Semiconductors |
| VDRM (Repetitive Peak Off-State Voltage) | 800 V | 800 V | 600 V | 1000 V | 800 V | 800 V |
| IT(RMS) Continuous On-State Current | 25 A | 25 A | 25 A | 25 A | 25 A | 25 A |
| Triggering Quadrants | 3Q (I, II, III) | 3Q (I, II, III) | 3Q (I, II, III) | 3Q (I, II, III) | 3Q (I, II, III) | 3Q (I, II, III) |
| Tj(max) | 150 °C | 150 °C | 150 °C | 150 °C | 150 °C | 150 °C |
| Commutation Series | Series BT (snubberless) | Series BT (snubberless) | Series BT (snubberless) | Series BT (snubberless) | Series BT (snubberless) | Series BT (snubberless) |
| Mounting Type | Through Hole (TO-220AB) | Through Hole (TO-220AB) | Through Hole (TO-220AB) | Through Hole (TO-220AB) | Through Hole (TO-220AB) | Through Hole (TO-220AB) |
| Qty-1 Unit Price (USD) | $2.45 | $2.45 (equivalent) | lower (600 V grade typically cheaper) | higher (1000 V grade typically pricier) | $2.45 (equivalent) | $2.45 (equivalent, NXP legacy stock) |
Ключевые отличия
- Snubberless 3Q Hi-Com design at 25 A RMS (против BTA41-800BRG (40 A 4Q Triac))
- Internally insulated TO-220AB (SOT78D) tab (против TO-220 non-insulated Triac variants)
- 150 °C maximum junction temperature (против 125 °C legacy Triac families)
Заметки по проектированию
Estimated: at IT(RMS) = 25 A with a typical VT of 1.6 V, the conduction dissipation is roughly 40 W; combined with switching losses, total PD may reach 45 W. The TO-220AB (SOT78D) RthJA on a 100 cm² copper-clad heatsink is typically 2-3 °C/W, giving a junction-to-ambient rise of 90-135 °C above ambient. At an ambient of 50 °C this leaves only ~65-20 °C margin to the 150 °C Tj(max). Use a heatsink with RthSA ≤ 1.5 °C/W, or derate IT(RMS) below 25 A in confined enclosures. Always measure case temperature in the prototype to validate the thermal model.
Do not parallel two BTA425Y-800BT devices to double the current rating - Triacs do not share current evenly due to positive temperature coefficient of on-state voltage, and one device will hog the load and fail. If you need >25 A, use the BT137 series for 8 A, BTA41 for 40 A, or move to an SCR pair in inverse-parallel. Also, never operate the gate with a continuous DC current after triggering - the gate is intended for short trigger pulses; sustained DC gate drive wastes power and can damage the gate-cathode junction over time.
Keep the gate-MT1 trace short and place the gate resistor (100-330 Ω) directly at the MT1/Gate pins of the Triac to minimise the gate-MT1 loop area. A long gate trace acts as an antenna that picks up AC-line dV/dt and can cause unwanted firing, especially on 3Q Triacs where quadrant IV is already disabled. Add a small ceramic snubber (10-47 nF + 100 Ω) across MT1-MT2 only if the load is highly capacitive (e.g., large EMI filter caps), since the BTA425Y-800BT is otherwise snubberless. Provide a 5 mm creepage distance around the package for reinforced AC-line isolation.
For phase-angle dimming of low-voltage transformers (12 V halogen) and LED driver inputs, the load is capacitive-leading, which subjects the Triac to a high dI/dt at turn-on. The BTA425Y-800BT's series-BT 3Q design tolerates this, but the load dI/dt should still be limited with a series inductor of 50-100 µH to stay within the published di/dt rating. For DC control of AC loads, add a zero-cross optocoupler such as the MOC3041 (zero-cross) for resistive loads or MOC3021 (random-phase) for phase-angle control. Always include a fuse or I²t-limited protection on the AC line to clear catastrophic Triac shorts.
Информация о соответствии
RoHS and REACH compliant per WeEn product page (ween-semi.com). Not AEC-Q100 qualified - this part targets industrial/commercial/white-goods, not automotive. Conflict-minerals declaration compliant per WeEn corporate policy.
