PVT312S-TPBF - 250V 190mA SPST-NO Photo Voltaic Relay | Infineon
Référence : PVT312S-TPBF ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 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 |
PVT312S-TPBF Présentation
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.
Alternatives de remplacement direct pour PVT312S-TPBF — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PVT312S-TPBF (même facteur de forme et même empreinte) — différant par Package, RoHS Status, Mounting Type, Output Switch Technology, Relay Terminals.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PVT312S
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PVT312SPBF
✅ Remplacement direct✓ En stock
$3.22 / unité
Voir la fiche technique →PVT312S-TPBF
✅ Remplacement direct✓ En stock
$3.85 / unité
Voir la fiche technique →CPC1906Y
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CPC1972Y
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PVT312S-TPBF Valeurs maximales et caractéristiques électriques
| 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 |
| Plage de température de fonctionnement | -40 C to +85 C |
| Boîtier | 6-SMD (0.300", 7.62 mm) PDIP SMT |
| Statut RoHS | ROHS3 Compliant |
| Output Switch Technology | HEXFET Power MOSFET (photovoltaic driven) |
Configuration des broches de PVT312S-TPBF
| Broche 1 | LED+ — LED Anode (positive input) |
| Broche 2 | LED- — LED Cathode (negative input) |
| Broche 3 | NC — Not connected (no internal bond) |
| Broche 4 | D1 — Output MOSFET Drain 1 (load terminal A) |
| Broche 5 | S — Output MOSFET Source (load terminal common) |
| Broche 6 | D2 — Output MOSFET Drain 2 (load terminal B) |
Applications typiques
PVT312S-TPBF convient pour 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PVT312S-TPBF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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))
Notes de conception
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.
Informations de conformité
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.
