PVT312S-TPBF - 250V 190mA SPST-NO Photo Voltaic Relay | Infineon
MPN: PVT312S-TPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.77 | $5.77 |
| 10 | $5.41 | $54.10 |
| 25 | $4.8 | $120.00 |
| 50 | $4.57 | $228.50 |
| 100 | $4.32 | $432.00 |
| 250 | $3.85 | $962.50 |
Drop-in alternatives for PVT312S-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:
PVT312S
β Drop-Inπ Reference alternative (not in catalog)
PVT312SPBF
β Drop-Inβ In Stock
$3.22 / Unit
View Datasheet βPVT312S-TPBF
β Drop-Inβ In Stock
$3.85 / Unit
View Datasheet βCPC1906Y
β Drop-Inπ Reference alternative (not in catalog)
CPC1972Y
β Drop-Inπ Reference alternative (not in catalog)
PVT312S-TPBF Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature Range | -40 C to +85 C |
| Package | 6-SMD (0.300", 7.62 mm) PDIP SMT |
| RoHS Status | ROHS3 Compliant |
| Output Switch Technology | HEXFET Power MOSFET (photovoltaic driven) |
PVT312S-TPBF Pin Configuration
| Pin 1 | LED+ β LED Anode (positive input) |
| Pin 2 | LED- β LED Cathode (negative input) |
| Pin 3 | NC β Not connected (no internal bond) |
| Pin 4 | D1 β Output MOSFET Drain 1 (load terminal A) |
| Pin 5 | S β Output MOSFET Source (load terminal common) |
| Pin 6 | D2 β Output MOSFET Drain 2 (load terminal B) |
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
PVT312S-TPBF is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for PVT312S-TPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| On-State Resistance Max | 10 ohm | 10 ohm | 10 ohm | [DATA_NEEDED] | [DATA_NEEDED] |
| 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 |
| Qty-1 Price (approx, USD) | 5.77 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Internationally stocked active ordering code with Tape & Reel packaging (vs PVT312S-T (obsolete))
- Higher load voltage envelope at same footprint (vs CPC1906Y (IXYS / Littelfuse))
- Photovoltaic-driven output requires no secondary-side bias supply (vs CPC1972Y (IXYS / Littelfuse))
Design Notes
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.
Compliance Information
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.
