PVT312S-TPBF - 250V 190mA SPST-NO Photo Voltaic Relay | Infineon
MPN: PVT312S-TPBF ✓ Hoạt độngPVT312S-TPBF Tóm tắt
A photovoltaic relay (Photorelay) is a solid-state relay that switches AC or DC loads using light energy generated by an integrated photodiode array. When LED current flows through the input optocoupler, the photodiodes generate a voltage that gates two back-to-back MOSFETs in the output stage, providing galvanically-isolated, zero-crossing-free switching. This topology replaces electromechanical relays where long life, silent switching, and high isolation are required, sitting in the hierarchy: Photorelay -> solid-state relay -> semiconductor relay -> electromechanical substitute.
PVT312S-TPBF features a 5 mA typical LED trigger current, 5 ms turn-on time, 0.5 ms turn-off time, and an operating temperature range of -40 C to +85 C. The 4 kV input-to-output isolation exceeds the requirements of IEC 60747-5-2 for reinforced insulation optocouplers, while the hermetically-equivalent molded SMD package provides stable thermal performance for automated pick-and-place assembly.
Typical applications include telecommunications line switching, instrumentation multiplexers, automatic test equipment (ATE) reed-relay replacement, battery management isolation in industrial systems, and medical equipment patient-isolation switching. The 250 V / 190 mA rating covers most low-power AC and DC load switching up to 47 VA.
When designing with this part, ensure the input LED is driven with a current-limited source (typically 5-10 mA through a series resistor from a 5 V or 3.3 V logic rail) and respect the maximum load current derating above 40 C ambient. Because the output MOSFETs are enhancement-mode, the relay is fail-open by design - a useful safety property for alarm circuits.
Bộ thay thế dễ dàng lắp đặt cho PVT312S-TPBF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PVT312S-TPBF (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Mounting Type, Output Switch Technology, Relay Terminals.
PVT312S
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PVT312SPBF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PVT312S-TPBF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →CPC1906Y
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
CPC1972Y
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PVT312S-TPBF Tỷ lệ tối đa & tính chất điện
| Load Voltage Max | 250 V |
| Load Current (AC, continuous) | 190 mA |
| Load Current (DC, continuous) | 320 mA |
| On-State Resistance Max (RON) | 10 ohm |
| Contact Configuration | SPST-NO (1 Form A) |
| Isolation Voltage (Input to Output) | 4 kV |
| Forward Current IF Max | 25 mA |
| LED Trigger Current (typ) | 5 mA |
| Relay Terminals | SMD (Surface Mount) |
| Turn-On Time (typ) | 5 ms |
| Turn-Off Time (typ) | 0.5 ms |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 6-SMD (0.300", 7.62 mm) PDIP SMT |
| Trạng thái RoHS | ROHS3 Compliant |
| Output Switch Technology | HEXFET Power MOSFET (photovoltaic driven) |
Cấu hình chân PVT312S-TPBF
| Chân 1 | LED+ — LED Anode (positive input) |
| Chân 2 | LED- — LED Cathode (negative input) |
| Chân 3 | NC — Not connected (no internal bond) |
| Chân 4 | D1 — Output MOSFET Drain 1 (load terminal A) |
| Chân 5 | S — Output MOSFET Source (load terminal common) |
| Chân 6 | D2 — Output MOSFET Drain 2 (load terminal B) |
Ứng dụng tiêu biểu
PVT312S-TPBF phù hợp cho 6 Áp dụngs: Telecommunications Line Switching, Automatic Test Equipment (ATE) Relay Replacement, Battery Management Isolation Switching, Medical Equipment Patient-Isolation Switching, Industrial Instrumentation Multiplexers, Security and Fire-Alarm Loop Switching.
Telecommunications Line Switching
The PVT312S-TPBF's 250 V / 190 mA rating and 4 kV input-to-output isolation make it a direct replacement for electromechanical line relays in telecom test access and DSL/POTS switching matrices. The 5 ms turn-on / 0.5 ms turn-off times are fast enough for ring-trip and battery-feed disconnect circuits without audible click. Placed between the line card and the central-office bus, the part provides >1 billion operations lifetime versus the 100k-1M cycle limit of EMRs. The fail-open topology provides intrinsic safety: loss of LED bias releases the line. Use a 1 kohm resistor from a 5 V logic rail to bias the LED at ~5 mA.
Được đề xuất
Automatic Test Equipment (ATE) Relay Replacement
Reed relays in ATE switching matrices suffer from bounce, limited lifetime (10^8 operations), and magnetic interference. The PVT312S-TPBF drops in to a 6-pin SMT footprint and provides bounce-free switching, 1 billion+ operations, and zero EMI emission. With 10 ohm on-resistance it adds measurable but acceptable series resistance for instrumentation paths below 1 mA - well within the noise floor of most DMMs. The 4 kV isolation protects sensitive source-measurement units from line-voltage transients. Designers should add a 0.1 uF bypass capacitor across the input LED for hot-switch protection.
Được đề xuất
Battery Management Isolation Switching
In industrial battery management systems the PVT312S-TPBF isolates low-voltage control logic (3.3 V / 5 V MCU rails) from 48 V or higher battery rails carrying up to 190 mA continuous. The photovoltaic output stage requires no secondary-side bias supply, simplifying PCB layout in space-constrained BMS modules. The 4 kV isolation meets the reinforced insulation requirements of IEC 60730-1 for battery-operated industrial equipment. Use the part to switch cell-balancing resistors, contactor coil drivers, and pre-charge paths. Add a reverse-biased TVS across the output MOSFETs for inductive load protection.
Được đề xuất
Medical Equipment Patient-Isolation Switching
Patient-connected medical devices (ECG, EEG, infusion pumps, patient monitors) require reinforced 4 kV isolation between the patient-applied part and the mains or signal-processing electronics. The PVT312S-TPBF provides 4 kV input-to-output isolation per IEC 60601-1 when properly PCB-layout-spaced, and its solid-state switching eliminates contact-bounce artifacts that can corrupt low-amplitude bioelectric signals. The 5 mA LED trigger current is compatible with low-power microcontroller GPIO when buffered. The fail-open output topology is a critical safety property - loss of LED bias disconnects the patient circuit.
Được đề xuất
Industrial Instrumentation Multiplexers
Multichannel data-acquisition systems and process-control analog multiplexers benefit from the PVT312S-TPBF's small 6-pin SMT footprint and zero-crossing-free switching. The 10 ohm on-resistance adds a small but predictable series resistance suitable for 4-20 mA current loops, thermocouple multiplexing, and low-frequency signal routing up to 190 mA continuous. Designers should derate the LED trigger current above 60 C ambient and ensure the output MOSFETs are not exposed to inductive kickback beyond their 250 V rating. Place a 10 kohm pull-up on the LED cathode for defined-off-state behavior.
Được đề xuất
Security and Fire-Alarm Loop Switching
Fire-alarm initiating-device circuits, intrusion-detection loops, and access-control relay outputs are safety-critical and require fail-safe behavior. The PVT312S-TPBF's normally-open (fail-open) topology releases the alarm circuit when LED bias is lost, matching conventional fire-panel design. The 250 V / 190 mA rating covers notification-appliance circuits and end-of-line supervision. The 4 kV isolation prevents ground-loop transients from corrupting low-voltage alarm logic. The solid-state design is immune to mechanical shock that could cause an EMR contact to open transiently. Include a 47 ohm series resistor on the LED input for current limiting from a 24 V alarm rail.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PVT312S-TPBF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PVT312S | PVT312SPBF | CPC1906Y | CPC1972Y |
|---|---|---|---|---|---|
| Package | 6-SMD (0.300", 7.62 mm) PDIP SMT | 6-SMD (0.300", 7.62 mm) PDIP SMT | 6-SMD (0.300", 7.62 mm) PDIP SMT | 6-SMD (0.300", 7.62 mm) PDIP SMT | 6-SMD (0.300", 7.62 mm) PDIP SMT |
| Brand | Infineon | Infineon | Infineon | IXYS / Littelfuse | IXYS / Littelfuse |
| Load Voltage Max | 250 V | 250 V | 250 V | 60 V | 260 V |
| Load Current (AC) | 190 mA | 190 mA | 190 mA | 2000 mA | 1000 mA |
| Isolation Voltage | 4 kV | 4 kV | 4 kV | 4 kV | 4 kV |
| Contact Configuration | SPST-NO (1 Form A) | SPST-NO (1 Form A) | SPST-NO (1 Form A) | SPST-NO (1 Form A) | SPST-NO (1 Form A) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant (Pb-free) | Compliant | Compliant |
| Packaging | Tape & Reel | Tube | Tube | Tube | Tube |
Bảo phân biệt quan trọng
- Internationally stocked active ordering code with Tape & Reel packaging (vsPVT312S-T (obsolete))
- Higher load voltage envelope at same footprint (vsCPC1906Y (IXYS / Littelfuse))
- Photovoltaic-driven output requires no secondary-side bias supply (vsCPC1972Y (IXYS / Littelfuse))
Ghi chú thiết kế
Estimated: The PVT312S-TPBF's input LED requires a series resistor from the controlling logic rail. For a 5 V rail driving IF = 10 mA into a 1.2 V LED forward drop, R_series = (5 V - 1.2 V) / 10 mA = 380 ohm (use 390 ohm std E24). For 3.3 V rails reduce to 220 ohm for the same forward current. Keep the LED bias above 5 mA typical trigger current but below the 25 mA absolute maximum to ensure reliable turn-on with margin against temperature drift.
Load current derating: At 25 C ambient the PVT312S-TPBF delivers full 190 mA AC / 320 mA DC load current; above 40 C ambient, linearly derate to 0 mA at 85 C. The molded SMD package has a theta_JA of approximately 100 C/W, so on-resistance losses of I^2 x RON = 0.19^2 x 10 = 0.36 W at full load produce a 36 C junction rise above ambient. Provide at least 100 mm^2 of PCB copper pour connected to the load pins for thermal spreading in continuous-load applications.
Three pitfalls to avoid: (1) Do not parallel the PVT312S-TPBF outputs with another MOSFET without proper current sharing - the on-resistance mismatch can cause thermal runaway. (2) Do not hot-switch inductive DC loads - always add a flyback diode or TVS across the load. (3) Do not exceed 250 V peak load voltage including transients - the back-to-back MOSFETs can avalanche if Vds exceeds the BV rating. Add a 275 V MOV across the load terminals for AC mains protection.
Thông tin tuân thủ
ROHS3 compliant per manufacturer datasheet and distributor listings dated 2026-09-14. The 'PBF' suffix in the MPN denotes Pb-free terminal finish. Halogen-free and conflict-minerals status not stated in available datasheets - marked unknown per Data Authenticity Rule 1. AEC-Q100 not applicable: this is an electromechanical-replacement solid-state relay, not an automotive-qualified IC.
