PVT312LS-TPBF - 250V 170mA SPST-NO Photo MOSFET Relay | Infineon
MPN: PVT312LS-TPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.45 | $4.45 |
| 10 | $3.95 | $39.50 |
| 100 | $3.5 | $350.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.75 | $2,750.00 |
Drop-in alternatives for PVT312LS-TPBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PVT312LS
β Drop-Inπ Reference alternative (not in catalog)
PVT312SPBF
β Drop-Inβ In Stock
$3.22 / Unit
View Datasheet βPVT312S-TPBF
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.85 / Unit
View Datasheet βPVT312LS-TPBF
β Drop-Inβ In Stock
$2.75 / Unit
View Datasheet βPVT312PBF
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PVT312LS-TPBF Maximum Ratings & Electrical Characteristics
| Contact Configuration | SPST-NO (1 Form A) |
| Load Voltage (Max) | 250 V |
| Load Current (AC, Continuous) | 170 mA |
| Load Current (DC, Continuous) | 300 mA |
| On-State Resistance (Max) | 15 ohm |
| Input-to-Output Isolation | 4 kV |
| Forward Current If (Max) | 25 mA |
| Forward Current If (Peak) | 50 mA |
| LED Forward Voltage (Typical) | 1.2 V |
| Output Switch Technology | HEXFET Power MOSFET (bidirectional) |
| Input Driver | GaAlAs IR LED + photovoltaic generator |
| Package | 6-SMD (0.300 inch, 7.62 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| MSL Level | 1 |
| RoHS Status | Compliant (TPBF suffix) |
PVT312LS-TPBF Pin Configuration
| Pin 1 | LED Anode (+) β LED input - connect to logic supply through current-limiting resistor |
| Pin 2 | LED Cathode (-) β LED input return - connect to logic ground |
| Pin 3 | NC β Not connected (per datasheet) |
| Pin 4 | MOSFET Drain/Source A β Output switch terminal A (bidirectional HEXFET) |
| Pin 5 | MOSFET Drain/Source B β Output switch terminal B (bidirectional HEXFET) |
| Pin 6 | NC β Not connected (per datasheet) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
PVT312LS-TPBF is suitable for 6 applications: Telecom Line Switching, PLC and Industrial Output Modules, Automatic Test Equipment (ATE), Medical Equipment Patient Isolation, Battery Management Isolation, Instrumentation Multiplexing.
Telecom Line Switching
The PVT312LS-TPBF is purpose-built for telecom line-card switching, where its 250 V load voltage covers international ringing and battery voltages (including 48 V, 90 V ringing, and on-hook battery feeds). The integrated active current-limit circuitry withstands surge transients that occur when lines are connected or experience lightning-induced surges - a critical advantage over photorelays without current limiting. Placed between the line interface and the codec/slicer, the 4 kV isolation protects low-voltage DSP circuitry from line-side fault voltages. The 15 ohm on-state resistance is acceptable for voice-band signaling and DC feed, while the SSR replaces bulky electromechanical relays with silent operation that eliminates acoustic cross-talk on densely populated line cards. The 170 mA AC rating comfortably handles off-hook and ring-trip current levels.
Recommended
PLC and Industrial Output Modules
In PLC digital output modules, the PVT312LS-TPBF switches 24 V DC or 120/240 V AC loads with silent, bounce-free operation that eliminates the mechanical wear of electromechanical relays. Its 4 kV isolation satisfies IEC 61131-2 requirements for industrial control isolation barriers between field-side wiring and logic-side controllers. The 170 mA / 300 mA DC rating covers typical solenoid, relay-coil, and indicator-lamp loads, while the SPST-NO contact form simplifies wiring to standard PLC output terminal blocks. Placed at the output stage after the logic-level driver, the LED is driven by 5-10 mA from a microcontroller GPIO, eliminating the high-current coil-drive circuitry required by EMRs. The device's unlimited switching cycles support frequent pulsed-output applications like PWM heating control.
Recommended
Automatic Test Equipment (ATE)
In ATE switching matrices and instrumentation multiplexers, the PVT312LS-TPBF provides clean, low-noise signal routing with no contact bounce to disturb sensitive measurements. The 15 ohm on-state resistance is acceptable for switching test signals in the audio and low-frequency analog range, while the 250 V load voltage covers most bench instrument signal levels. The SSR's virtually unlimited switching cycles (versus ~1 million for EMRs) suits high-throughput production test where relays cycle hundreds of times per hour. Placed in reed-relay-replacement positions, the photorelay operates silently, eliminating the audible clicking that complicates acoustic testing. The 4 kV isolation protects expensive measurement instruments from DUT fault voltages.
Recommended
Medical Equipment Patient Isolation
The PVT312LS-TPBF's 4 kV input-to-output isolation meets IEC 60601-1 patient-isolation requirements for medical equipment that contacts patients while connected to mains-powered instruments. In patient monitoring, infusion pumps, and diagnostic equipment, the photorelay switches low-voltage signal lines with a guaranteed isolation barrier that protects patients from equipment faults. The GaAlAs LED input draws microampere-level current, enabling battery-powered designs without compromising isolation ratings. The solid-state construction eliminates mechanical failure modes that could create intermittent patient-isolation failures over time. The 250 V load voltage covers both low-voltage patient signals and mains-derived voltages used in equipment power stages, while the 170 mA current handles typical sensor excitation and signal-routing loads.
Recommended
Battery Management Isolation
In battery management systems (BMS) for electric vehicles and energy storage, the PVT312LS-TPBF provides galvanic isolation between high-voltage battery stacks and low-voltage control/MCU circuits. The 250 V load voltage covers typical 48 V and 96 V battery packs, while the 300 mA DC continuous current handles auxiliary load switching (precharge relays, contactor coils, balancing circuits). The 4 kV isolation satisfies UL 1973 and IEC 62619 requirements for battery system isolation. Placed between the AFE (analog front-end) monitor IC and the high-voltage bus, the SSR enables safe signal routing for cell-balancing control and module-to-module communication. The LED input draws only milliwatts, minimizing quiescent power drain on the low-voltage monitoring system.
Recommended
Instrumentation Multiplexing
In data-acquisition systems and instrumentation multiplexers, the PVT312LS-TPBF routes analog signals between multiple sensors and a single ADC, replacing mechanical reed relays with silent, long-life solid-state switching. The 15 ohm on-state resistance is acceptable for many sensor types (thermistors, RTDs, low-impedance transducers), and the bounce-free switching eliminates transient errors during channel transitions. The 250 V load voltage allows direct switching of Β±100 V sensor excitation signals, while the 4 kV isolation protects sensitive front-end amplifiers from common-mode transients. The photorelay's wide operating temperature (-40C to +85C) supports industrial and outdoor instrumentation. The virtually unlimited switching cycles suit continuous data-logging applications where channels switch thousands of times per day.
Recommended
Recommended Products Summary
Engineering reference data for PVT312LS-TPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PVT312LS | PVT312SPBF | PVT312S-TPBF | PVT312PBF |
|---|---|---|---|---|---|
| Package | 6-SMD (0.300 inch, 7.62 mm) | 6-SMD (0.300 inch, 7.62 mm) - same | 6-SMD (0.300 inch, 7.62 mm) - same | 6-SMD (0.300 inch, 7.62 mm) - same | 6-SMD (0.300 inch, 7.62 mm) - same |
| Brand | Infineon Technologies | Infineon Technologies - same | Infineon Technologies - same | Infineon Technologies - same | Infineon Technologies - same |
| Load Voltage (Max) | 250 V | 250 V | 250 V | 250 V | 250 V |
| Load Current (AC) | 170 mA | 170 mA | 170 mA | 170 mA | 170 mA |
| Active Current Limit | Yes (LS suffix) | Yes | No | No | No |
| On-State Resistance (Max) | 15 ohm | 15 ohm | 15 ohm | 15 ohm | 15 ohm |
| Isolation Voltage | 4 kV | 4 kV | 4 kV | 4 kV | 4 kV |
| Packaging Form | Tape & Reel (TPBF) | Tube | Tube | Tape & Reel | Tube |
Key Differentiators
- Integrated active current-limit circuitry (vs PVT312SPBF)
- Tape-and-reel packaging for high-volume assembly (vs PVT312LS (tube))
- 4 kV isolation exceeds industry standard (vs PVT412)
Design Notes
At maximum 170 mA load current and 15 ohm on-state resistance, the PVT312LS-TPBF dissipates approximately 0.43 W in the output MOSFET. The 6-SMD package has limited thermal headroom; provide adequate PCB copper pours beneath and around the output pins to spread heat. Estimated: at 0.43 W dissipation with theta_JA of approximately 80 C/W (typical for 6-SMD with minimum footprint), junction temperature rises 35 C above ambient - acceptable but verify with thermal measurements in your specific PCB layout. For continuous 170 mA operation, increasing the copper area to 1 square inch reduces theta_JA to approximately 40 C/W.
Maintain adequate creepage and clearance distance between the LED-side pins (1, 2) and the output-side pins (4, 5) on the PCB to preserve the 4 kV isolation rating. Use a slot or cut in the PCB if necessary to achieve 4 mm minimum clearance for 250 V working voltage applications. The output MOSFET pins are bidirectional - either pin can be the source or drain, simplifying PCB layout. Place a 0.1 uF bypass capacitor across the LED pins if the LED drive signal is from a long cable or high-impedance source, to prevent false triggering from capacitive coupling.
Do not exceed 25 mA continuous LED forward current or 50 mA peak surge - the LED will degrade. The minimum LED turn-on current is approximately 2-5 mA; designing for 10 mA provides margin across temperature and unit-to-unit variation. Do not use the photorelay to switch DC voltages above its maximum load voltage rating, even momentarily - the output MOSFET will avalanche and fail. Note that the output is bidirectional - no internal protection against reverse polarity, so external TVS diodes may be required for inductive loads. The LS suffix denotes active current limiting - do not confuse with the standard PVT312S which lacks this protection.
Compliance Information
RoHS compliant per TPBF suffix; lead-free per Infineon product page. AEC-Q100 not applicable - choose automotive-grade variant if needed. EU RoHS and REACH compliance confirmed.
