PJA3415 - 20V P-Ch 4A MOSFET SOT-23 | Panjit International Inc.
부품 번호: PJA3415 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.18 | $0.18 |
| 10 | $0.15 | $1.50 |
| 100 | $0.1 | $10.00 |
| 500 | $0.078 | $39.00 |
| 1,000 | $0.062 | $62.00 |
| 3,000 | $0.048 | $144.00 |
PJA3415 개요
A P-Channel Enhancement Mode MOSFET is a type of field-effect transistor in which the conducting channel is formed by applying a negative gate-to-source voltage (VGS) relative to the source. P-channel MOSFETs are typically used on the high-side of a load (the supply rail side) in low-voltage systems where a simple, low-cost high-side switch is needed. They sit within the broader transistor hierarchy: MOSFET -> FET -> discrete semiconductor -> active component. Because the gate is voltage-controlled, P-channel devices draw essentially no DC gate current in static operation, enabling direct MCU GPIO driving without driver stages in many low-power designs.
Key features include 20V drain-to-source voltage rating, 4A continuous drain current at TA = 25C, low on-resistance, and a fast switching transition suitable for DC-DC converters and power-ORing applications. The standard SOT-23 package is one of the most widely adopted small-outline surface-mount packages in the industry and is supported by virtually all automated assembly lines. Per the manufacturer datasheet, the maximum junction-to-ambient thermal resistance (RθJA) on a 1-inch FR-4 board with 2oz copper is package-limited.
Typical applications include power management in portable devices, battery protection circuits in single-cell Li-ion/polymer packs, load switching in USB peripherals, high-side switches in solid-state relays (SSRs), and power-rail switching in IoT sensor nodes. The P-channel topology eliminates the charge pump typically needed for N-channel high-side switches, simplifying firmware and reducing BOM count.
When designing with the PJA3415, ensure gate-source voltage stays within the absolute maximum rating and use a pull-up or pull-down resistor to set the default state during MCU reset. Decoupling at the drain and source rails is recommended for switching applications to limit ringing. For thermal management in continuous 4A operation, follow the manufacturer's PCB layout guidance for the SOT-23 footprint.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet. All specifications are sourced from the Panjit International PJA3415 datasheet and authorized distributor listings as of 2026-10-09.
드롭인 대체품: PJA3415 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PJA3415 (동일 폼 팩터 및 풋프린트) — 차이점: Package, RoHS Status.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PJA3415_R1_00001
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PJA3415_R2_00001
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PJA3415A-AU
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PJA3415 최대 정격 & 전기적 특성
| 트랜지스터 유형 | P-Channel Enhancement Mode MOSFET |
| Drain-Source Voltage (VDS) | 20 V |
| Continuous Drain Current (ID) | 4 A (TA = 25C) |
| Power Dissipation (PD) | 1.25 W (TA = 25C) |
| 패키지 | SOT-23 |
| 실장 유형 | Surface Mount |
| 핀 수 | 3 |
| 동작 온도 범위 | -55C to +150C (junction) |
| Manufacturer | Panjit International Inc. |
| RoHS 상태 | Compliant |
PJA3415 핀 구성
| 핀 1 | GATE — Gate drive input; pull to logic low to turn on the P-channel device |
| 핀 2 | SOURCE — Source terminal; connected to the higher-voltage rail in a high-side switch |
| 핀 3 | DRAIN — Drain terminal; connected to the load |
PJA3415 안전 동작 영역 (estimated, based on 1.25 W PD and SOT-23 thermal limits)
일반적인 애플리케이션
PJA3415 적합 용도: 6 애플리케이션s: Battery Protection in Single-Cell Li-ion Packs, High-Side Load Switch in USB Peripherals, Power-Path Management in Portable Electronics, Solid-State Relay (SSR) Output Stage, IoT Sensor Node Power Gating, Motor Driver Reverse-Battery Protection.
Battery Protection in Single-Cell Li-ion Packs
The PJA3415's P-channel topology enables high-side battery protection in single-cell Li-ion/Li-polymer packs without requiring a charge pump for the gate drive. With its 20V VDS rating (comfortably above the 4.2V fully charged cell plus transient spikes) and 4A continuous drain current, the device can switch pack current directly off when a protection controller signals a fault. The SOT-23 package occupies minimal PCB area inside the protection board, fitting beside a dedicated Li-ion protector such as the DW01-P. Designers should validate SOA at the maximum expected discharge current and ensure the gate is held low (device on) with a pull-down resistor.
추천
High-Side Load Switch in USB Peripherals
In USB peripherals, OTG adapters, and self-powered USB hubs, the PJA3415 acts as a high-side load switch controlled by an MCU GPIO. Because the gate of a P-channel MOSFET pulls the device on with a logic-low signal, no driver or charge pump is needed for low-side logic control. The 20V VDS, 4A ID, and SOT-23 footprint enable compact BOM count in space-constrained dongles. Add a 100kΩ gate pull-down to define the default-on state during MCU reset, and place a 10μF VBUS bypass at the drain to suppress inrush transients.
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Power-Path Management in Portable Electronics
The PJA3415 fits portable power-path designs where a battery rail and a wall-adapter rail must be ORed together or one must be selectively disconnected. Its low on-resistance minimizes voltage drop across the switch at typical 1-2A loads, preserving battery runtime. The SOT-23 footprint enables placement near the connector without consuming board space. For a two-source ORing design, pair two PJA3415s back-to-back (sources tied, drains to the load) to block reverse current, replacing a Schottky diode pair with much lower conduction loss.
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Solid-State Relay (SSR) Output Stage
For low-voltage DC solid-state relays replacing electromechanical relays, the PJA3415 provides a silent, bounce-free switching element with sub-millisecond turn-off times. Its 4A rating covers most low-voltage DC solenoid, LED strip, and small-motor loads driven from 5V or 12V rails. The SOT-23 package enables miniaturization of the relay footprint on DIN-rail or PCB-mount SSR modules. Drive the gate from an optocoupler output with a 10kΩ pull-up to VDD for galvanic isolation of the control side from the switched load.
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IoT Sensor Node Power Gating
Battery-powered IoT sensor nodes (BLE beacons, environmental sensors, smart locks) need to duty-cycle sub-systems like radios and sensors to extend battery life. The PJA3415 gates power to the radio module or sensor with minimal quiescent drain when off, contributing negligible leakage to deep-sleep budget. Its low gate charge keeps switching transients short, preserving the wake-up latency budget. Pair the PJA3415 with an ultra-low-power MCU (e.g., PIC16F18325) that drives the gate directly from a GPIO with a 100kΩ pull-down for fail-safe behavior.
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Motor Driver Reverse-Battery Protection
In small brushed DC motor circuits such as consumer robotics, toys, and appliance controls, the PJA3415 protects downstream drivers from accidental reverse-battery insertion. Placed in series with the battery feed (P-channel source toward battery+, drain toward load), the device is naturally off when battery polarity reverses because the gate-source voltage becomes positive, blocking the channel. Add a 100kΩ gate pull-up to the positive rail for normal operation; the pull-up automatically disables the device on reverse connection. Rated for 4A continuous, the PJA3415 covers most sub-1A hobby-motor circuits comfortably with margin for stall currents.
추천
추천 제품 요약
엔지니어링 참조 데이터: PJA3415 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PJA3415_R1_00001 | PJA3415_R2_00001 | PJA3415A-AU |
|---|---|---|---|---|
| Brand | Panjit International Inc. | Panjit International Inc. | Panjit International Inc. | Panjit International Inc. |
| Package | SOT-23 | SOT-23 - same | SOT-23 - same | SOT-23 - same |
| Transistor Type | P-Channel Enhancement Mode MOSFET | P-Channel Enhancement Mode MOSFET | P-Channel Enhancement Mode MOSFET | P-Channel Enhancement Mode MOSFET |
| Drain-Source Voltage (VDS) | 20 V | 20 V | 20 V | 20 V |
| Continuous Drain Current (ID) | 4 A | 4 A | 4 A | 4.3 A (higher) |
| Power Dissipation (PD) | 1.25 W | 1.25 W | 1.25 W | 1.25 W |
| Operating Temperature Range | -55C to +150C (junction) | -55C to +150C (junction) | -55C to +150C (junction) | -55C to +150C (junction), automotive-qualified |
| Reel / Packaging Code | Std (MPN without R1/R2 suffix) | R1 reel orientation | R2 reel orientation | AU automotive grade |
주요 차별점
- Two reel orientation options under a single part number (vs PJA3415_R1_00001)
- Higher-current companion available in same footprint (vs PJA3415A-AU)
설계 노트
Estimated: The PJA3415 power dissipation is rated at 1.25 W on the Panjit-recommended PCB (1-inch-square FR-4, 2oz copper). At maximum 4A continuous drain current with full-rated on-resistance, the device will heat rapidly. Designers must confirm theta_JA from the Panjit datasheet, calculate worst-case P = I^2 x R, and derate to keep Tj below 150C. For sustained loads near 4A, use a host PCB with at least 1 inch^2 of 2oz copper under the SOT-23 drain pad.
Do not exceed the absolute maximum VGS rating; typical small-signal P-channel MOSFETs allow +/-8V or +/-12V gate-source. Also, ensure the gate is always defined during MCU reset - a floating gate can partially turn on the device, causing unpredictable load behavior. Use a 100kΩ pull-down (high-side P-channel default on) or pull-up (default off) tied between gate and source. Without this resistor, the device may oscillate or draw shoot-through current at first power-up.
For switching applications above 1A, minimize the source and drain trace inductance to limit ringing. Place the PJA3415 as close as practical to the upstream connector or load, and use a ground plane or wide copper pour connecting the drain pad thermally. Add a 100nF ceramic bypass from source to drain as close to the package as possible to suppress high-frequency ringing. Reference the manufacturer's SOT-23 land pattern recommendations in the datasheet mechanical drawing.
The R1 and R2 ordering suffixes (e.g., PJA3415_R1_00001 vs PJA3415_R2_00001) encode reel orientation only and have no electrical difference. However, mixing R1 and R2 reels on the same pick-and-place line can cause feeder misalignment. Coordinate the reel orientation with your CM's production line requirements at order placement to avoid a re-reeling charge or line stoppage.
규정 준수 정보
RoHS compliant per DigiKey and Mouser listings. AEC-Q100 qualification available on the PJA3415A-AU variant; the base PJA3415 is not AEC-Q100 qualified. Halogen-free status not stated in the provided data.
