PS2561L2-1-V-A - 5000Vrms Phototransistor Optocoupler, 4-SMD | Renesas
部品番号: PS2561L2-1-V-A ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.55 | $5.50 |
| 100 | $0.41 | $41.00 |
| 500 | $0.32 | $160.00 |
| 1,000 | $0.27 | $270.00 |
PS2561L2-1-V-A 概要
An optocoupler (also called an optoisolator or photocoupler) is a semiconductor isolation device that transmits an electrical signal between two circuits using a short optical or infrared light path while maintaining a galvanic isolation barrier. Phototransistor optocouplers are the most common subtype, using an infrared LED on the input side and a phototransistor on the output side. They sit within the broader hierarchy: optocoupler -> isolator -> semiconductor -> optoelectronic component. Their key role is breaking ground loops, protecting low-voltage logic from high-voltage transients, and providing reinforced safety isolation in industrial, medical, and renewable-energy systems.
Key features include a wide operating temperature range, GaAs LED input with low forward current requirements (IF typ. around 5-10 mA), and a CTR (Current Transfer Ratio) characterized across multiple rank grades for design flexibility. The 4-SMD Gull-wing footprint with extended creepage improves PCB-level isolation and resists surface contamination in harsh environments.
The PS2561L2-1 uses an LED-phototransistor architecture: the input GaAs diode emits infrared light when forward-biased, and the integrated NPN phototransistor conducts proportionally to the received optical flux. This purely optical coupling path eliminates ground loops and rejects common-mode transients up to the rated isolation voltage. The wide-lead package improves creepage, helping designs meet IEC 60747-5-5 reinforced insulation standards.
Typical applications include PLC digital input modules, isolated gate-drive bias for power MOSFETs/IGBTs, switching power supply feedback loops, isolated communication interfaces (RS-485/232), and industrial process-control isolation barriers.
When designing, ensure the IF bias resistor limits LED current within the absolute maximum ratings and add a base-emitter resistor to control dark current. Always respect the creepage/clearance requirements of the end-product safety standard (IEC 60950, IEC 62368-1, or IEC 61010-1 for industrial).
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, making component selection and sourcing faster for engineers.
ドロップイン代替品: PS2561L2-1-V-A — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
PS2561L2-1-V-H-A
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PS2561L2-1-V-E3-A
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PS2561L2-1-F3-A
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PS2561L1-1-V-A
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TLP181GB-TPL,E(O
✅ ドロップイン📋 参考代替品（カタログ未掲載）
HCPL-817-000E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PS2561L2-1-V-A 最大定格＆電気的特性
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 1 |
| Input Type | DC (GaAs LED) |
| 出力タイプ | NPN Phototransistor |
| Maximum Collector-Emitter Voltage (VCEO) | 80 V |
| Maximum Output Current per Channel | 50 mA |
| VCE Saturation (Max) | 300 mV |
| パッケージ | 4-SMD (Gull-wing, wide lead) |
| 実装タイプ | Surface Mount |
| 動作温度 | -55C to +100C (per datasheet family) |
| Creepage Distance | Extended (wide lead bending type) |
| RoHS ステータス | Compliant |
| Packaging Option | Tape & Reel (-A suffix) |
PS2561L2-1-V-A ピン構成
| ピン 1 | LED Anode — GaAs LED anode (forward-biased for infrared emission) |
| ピン 2 | LED Cathode — GaAs LED cathode (connect to ground via current-limit resistor) |
| ピン 3 | Emitter — NPN phototransistor emitter (typically ground on output side) |
| ピン 4 | Collector — NPN phototransistor collector (pull-up to VCC on output side) |
主な用途
PS2561L2-1-V-A の用途: 7 件s: PLC Digital Input Module, Isolated Gate-Drive Bias Supply, Switching Power Supply Feedback Loop, Isolated RS-232 / RS-485 Communication Interface, Medical Patient-Monitoring Isolation Barrier, Industrial Process-Control Isolation Module, Solar Inverter String Monitoring.
PLC Digital Input Module
The PS2561L2-1-V-A's 5000 Vrms isolation and 80 V VCEO rating make it an ideal optocoupler for PLC digital input modules per IEC 61131-2. The wide-creepage Gull-wing 4-SMD package helps designs meet reinforced-insulation and pollution-degree-2 creepage requirements on the field side while keeping the logic side isolated from 24V industrial transients. Designers bias the GaAs LED through a 2.4 kohm series resistor from the 24V field supply and pull the phototransistor collector up to 5V logic via a 10 kohm resistor, achieving a clean 0-5V logic swing at IF ~10 mA. The wide operating temperature range supports cabinet-mount installations. Compared with logic-output optocouplers, this part costs ~60% less, which matters in 8- or 16-channel input cards where BOM cost dominates.
おすすめ
Isolated Gate-Drive Bias Supply
In isolated gate-drive circuits for IGBTs and power MOSFETs in motor drives and solar inverters, the PS2561L2-1-V-A provides a low-cost feedback or enable-isolation path. Its 5000 Vrms rating easily handles the 600V/1200V bus potentials typical of three-phase inverters, while the phototransistor output can source 50 mA - enough to drive small-signal logic or a secondary-side bootstrap. The wide-creepage Gull-wing footprint reduces PCB contamination-induced tracking failure in high-humidity environments. A common circuit uses the part to transmit the PWM enable signal from a 3.3V MCU to a high-side gate driver, with a 5-10 mA IF bias set by a series resistor. Compared with digital isolators like ADuM1411, this optocoupler trades speed (phototransistor bandwidth ~100 kHz) for ~70% lower cost in non-critical-path feedback loops.
おすすめ
Switching Power Supply Feedback Loop
The PS2561L2-1-V-A is widely used in isolated AC-DC and DC-DC switching power supplies to feed back the output voltage error from the secondary side to the primary-side PWM controller, completing the safety isolation barrier. Its 5000 Vrms rating meets IEC 62368-1 reinforced insulation for adapters up to 5 kV transient stress. The NPN phototransistor output can directly modulate the COMP pin of primary-side controllers, with a 4.7 kohm pull-up to the auxiliary Vcc. The GaAs LED forward current of typically 5-10 mA is biased from a TL431 reference on the secondary side. The wide-creepage SMD package supports high-density adapter layouts. Compared with the PS2561L-1 (narrow lead), the L2 wide-lead variant offers superior PCB-level isolation in pollution-degree-2 consumer environments.
おすすめ
Isolated RS-232 / RS-485 Communication Interface
Industrial communication ports (RS-232, RS-485, CAN) require galvanic isolation to protect downstream MCUs from ground loops and field-side transients. The PS2561L2-1-V-A provides a low-cost one-channel barrier in half-duplex point-to-point links or as a TX-enable isolator. Its 80 V VCEO and 50 mA collector current comfortably drive low-power UART logic, while the 5000 Vrms isolation meets IEC 61000-4-2 surge requirements on field-side cables. The Gull-wing SMD package supports reflow assembly on densely-populated interface cards. Designers typically operate the phototransistor with a 4.7 kohm pull-up and limit IF to ~10 mA for clean logic transitions. Compared with multi-channel digital isolators, this single-channel part saves cost in space-constrained designs where only one signal needs isolation.
おすすめ
Medical Patient-Monitoring Isolation Barrier
Patient-connected medical equipment (ECG, EEG, blood-pressure monitors) requires reinforced 5000 Vrms isolation per IEC 60601-1 between the patient side and the operator-accessible electronics. The PS2561L2-1-V-A provides this isolation barrier for low-speed analog and digital signals such as lead-off detection, gain-switch control, or sync pulses. Its wide-creepage Gull-wing package supports the 8 mm creepage required by 60601-1 for reinforced insulation. The phototransistor's slow ~5-20 us rise time is acceptable for sub-100 kHz control signals. Compared with specialized medical isolators (e.g., ADuM3154), this part saves significant cost when only basic digital isolation is needed. Designers must still verify that the end-system creepage/clearance meets the medical standard's MOOP/MOPP requirements.
おすすめ
Industrial Process-Control Isolation Module
In 4-20 mA current-loop and analog signal-conditioning modules, the PS2561L2-1-V-A provides channel-to-channel or field-to-controller isolation in distributed I/O systems. Its 80 V VCEO supports 24V industrial signal swings, and the 5000 Vrms isolation blocks ground loops across long cable runs in process plants. The wide-lead Gull-wing package resists surface contamination in chemical or outdoor environments where pollution degree 2 or 3 applies. A typical application uses the optocoupler to isolate a 0-10V analog signal conditioned by an op-amp, with the phototransistor collector tied to a single-ended ADC input. Compared with the PS2561L-1 narrow-lead variant, the L2 extended creepage helps the module pass IEC 61010-1 safety testing for industrial control equipment with less PCB layout effort.
おすすめ
Solar Inverter String Monitoring
Solar inverters monitor each PV string's voltage and current for fault detection and maximum power point tracking. The PS2561L2-1-V-A isolates the high-voltage DC string monitor signals (up to 1500V in residential systems) from the low-voltage controller side. The 5000 Vrms rating provides ample margin over the maximum string voltage, and the wide-creepage Gull-wing package supports outdoor inverter pollution-degree-2 environments. The phototransistor output can interface directly with 3.3V MCU GPIO, with a 47 kohm pull-up to limit dark current. Compared with logic-output optocouplers, this part saves cost when only occasional fault-flag transmission is needed rather than high-speed data. Designers must add a base-emitter resistor to suppress false triggering from ambient light in outdoor installations.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PS2561L2-1-V-A — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PS2561L2-1-V-H-A | PS2561L2-1-V-E3-A | TLP181GB-TPL,E(O | HCPL-817-000E |
|---|---|---|---|---|---|
| Package | 4-SMD (Gull-wing, wide lead) | 4-SMD (Gull-wing) - same | 4-SMD (Gull-wing) - same | 4-SMD (Gull-wing) - same | 4-SMD (Gull-wing) - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Toshiba | Broadcom |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Output Type | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor |
| VCEO (Max) | 80 V | 80 V | 80 V | 80 V | 80 V |
| Collector Current (Max) | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA |
| CTR Rank Grade | A grade (typical 80-240%) | H grade (higher CTR) | A grade (same as target) | GB grade (100-200%) | Selectable (50-600%) |
| Unit Price (Qty-1, as of 2026-10-10) | $0.62 | $0.65 | $0.62 | $0.55 | $0.58 |
主な差別化要因
- Higher CTR rank grade option in same package （vs PS2561L2-1-V-A)
- Cross-brand second-source availability （vs PS2561L2-1-V-A only)
- Wide-creepage Gull-wing for IEC 62368-1 reinforced insulation （vs PS2561L-1 (narrow lead))
設計ノート
Estimated: at IF = 10 mA and VCE = 5 V, the PS2561L2-1 dissipates roughly 50 mW in the LED path plus 25 mW in the phototransistor. Total power is 75 mW, well below the 4-SMD Gull-wing thermal limit of ~200 mW. Limit IF to 30 mA maximum per the datasheet absolute ratings. Use a series resistor of (VCC - 1.2V) / IF_desired, e.g., 3.9 kohm at 24V to set IF at 5.8 mA. Always include a base-emitter resistor of 1-10 Mohm across pins 3-4 to suppress dark-current false triggering.
The wide-lead Gull-wing footprint requires careful PCB layout: maintain a minimum of 6 mm creepage distance from any input-side trace to any output-side trace on the same board surface, and at least 8 mm for IEC 62368-1 reinforced insulation. Do not place any copper traces or vias under the optocoupler body between pin groups. The exposed body should face away from heat sources. Both input and output bypass capacitors (100 nF ceramic) are recommended near the LED and collector pins respectively, with the LED return connected directly to the input-side ground plane.
The phototransistor's slow rise/fall time (~5-20 us typical, depending on load resistance) limits the PS2561L2-1 to signals below ~100 kHz. For high-speed data, use a logic-output optocoupler (e.g., 6N137) instead. To improve edge speed in phototransistor circuits, lower the pull-up resistor value (e.g., 1 kohm instead of 10 kohm), which reduces RC time constant but increases dark-current sensitivity. Add a Schmitt-trigger buffer on the output for clean logic transitions.
Do not operate the LED below the recommended IF minimum (~5 mA for most CTR grades), as CTR drops sharply and the part may fail to switch reliably. Avoid exceeding VCEO = 80 V on the phototransistor collector - this is the most common absolute-maximum violation in 24V industrial designs without a series Zener clamp. Verify the phototransistor collector-emitter blocking voltage with the actual load (relay coils, solenoids) for back-EMF. Finally, remember that optocouplers age: CTR degrades over time and temperature, so design with at least 2x margin on IF bias current.
コンプライアンス情報
RoHS and REACH compliant per Renesas product page. Not AEC-Q100 qualified - this part targets industrial, not automotive. 5000 Vrms isolation meets IEC 60747-5-5 reinforced insulation; PCB-level creepage must meet end-product standard (IEC 62368-1, IEC 61010-1, IEC 60601-1).
