IPN95R3K7P7ATMA1 - 950V CoolMOS P7 N-MOSFET 2A SOT-223 | Infineon
MPN: IPN95R3K7P7ATMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.72 | $0.72 |
| 10 | $0.65 | $6.50 |
| 100 | $0.57 | $57.00 |
| 500 | $0.52 | $260.00 |
| 1,000 | $0.48 | $480.00 |
| 3,000 | $0.44 | $1,320.00 |
IPN95R3K7P7ATMA1 Overview
A power MOSFET is a voltage-controlled semiconductor switch used to commutate currents in power conversion circuits. The CoolMOS P7 series specifically targets high-voltage, low-power switch-mode power supplies (SMPS) and replaces conventional high-voltage MOSFETs with a super-junction structure that dramatically reduces on-state resistance and gate charge per unit area, enabling higher efficiency and smaller magnetics at 950 V operating points.
Key differentiating features include an integrated Zener-protected gate (ESD ruggedness improvement), a very low reverse-recovery charge of the body diode, an ultra-wide SOA region, and high dv/dt ruggedness. These traits make the IPN95R3K7P7ATMA1 suited to quasi-resonant flyback and isolated buck topologies where avalanche energy and EMI behavior must be controlled.
Architecturally, the device uses Infineon's P7 super-junction charge-balance concept, which arranges deep P-columns under the source to deplete the drift region under reverse bias. This results in a much thinner, lightly doped drift layer for the same breakdown voltage, reducing RDS(on)*A figure of merit versus standard 950 V planar MOSFETs.
Typical applications include low-power SMPS adapters (e.g. 5-15 W auxiliary supplies), LED lighting drivers with universal mains input, smart-meter auxiliary rails, and industrial auxiliary supplies operating directly from rectified 400 V or 480 V AC bus voltages. The wide VDS margin of 950 V provides significant design headroom for lightning surge and reflected-voltage transients in flyback converters.
When designing with this part, ensure the gate-drive voltage reaches at least 10 V for full RDS(on) specification and respect the linear derating of ID with temperature. The exposed tab on SOT-223 must be soldered to a copper pour of at least 25 mm^2 to keep junction temperature within safe limits during continuous conduction.
This page synthesizes distributor pricing, parametric comparison with same-package alternatives, application context, and design considerations not all present in any single vendor datasheet.
Drop-in alternatives for IPN95R3K7P7ATMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with IPN95R3K7P7ATMA1 (same form factor and footprint) — differing in Technology, Package, Drain-Source Voltage (VDS), Operating Junction Temperature, Gate Threshold Voltage (VGS(th)).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IPN95R1K2P7ATMA1
✅ Drop-In✓ In Stock
$0.36 / Unit
View Datasheet →IPN95R3K7P7
✅ Drop-In📋 Reference alternative (not in catalog)
BSC076N06NS3GATMA1
✅ Drop-In✓ In Stock
$0.65 / Unit
View Datasheet →IPN95R3K7P7ATMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Series | CoolMOS P7 |
| Transistor Type | N-Channel MOSFET |
| Drain-Source Voltage (VDS) | 950 V |
| Continuous Drain Current (ID) at Tc | 2.0 A |
| Power Dissipation (Pd) at Tc | 6 W |
| On-State Resistance (RDS(on)) max | 3700 mOhm |
| Technology | Super-junction (CoolMOS P7) |
| Package | PG-SOT223 (3-pin + tab, surface mount) |
| Mounting Type | Surface Mount |
| Operating Junction Temperature | -55 C to +150 C |
| RoHS Status | Compliant |
| Lead-Free | Yes |
IPN95R3K7P7ATMA1 Pin Configuration
| Pin 1 | Gate — Gate control input |
| Pin 2 | Drain — Drain terminal (also connected to tab) |
| Pin 3 | Source — Source terminal |
| Pin TAB | Drain — Drain tab (electrically tied to pin 2; thermal pad) |
Safe Operating Area (DC)
Typical Applications
IPN95R3K7P7ATMA1 is suitable for 6 applications: Low-Power SMPS Flyback Adapter, LED Lighting Driver (Universal Mains), Smart Meter Auxiliary Power Supply, Industrial Auxiliary / Standby Supply, Solar Micro-Inverter / Power Optimizer, Surge-Protected White Goods Power Supply.
Low-Power SMPS Flyback Adapter
The IPN95R3K7P7ATMA1 is positioned for 5-15 W universal-mains flyback adapters where the 950 V VDS rating provides ample margin above the 565 V peak of rectified 230 VAC plus reflected voltage spikes. Its CoolMOS P7 super-junction technology delivers low gate charge Qg, which directly reduces driving loss at 65-130 kHz quasi-resonant switching frequencies. The 2 A continuous drain current and 3.7 Ohm RDS(on) are more than sufficient for the sub-1 A average currents typical of this power class. The PG-SOT223 footprint with integrated drain tab simplifies single-sided PCB layouts and provides adequate copper area for thermal management in adapter-style enclosures. Compared to older 800 V planar MOSFETs, the P7 design reduces switching loss by 30-40%, enabling smaller transformer cores and lower standby power.
Recommended
LED Lighting Driver (Universal Mains)
The IPN95R3K7P7ATMA1 is a strong candidate for isolated and non-isolated LED lighting drivers operating directly from 100-277 VAC rectified mains. The 950 V breakdown voltage withstands the 390 V peak of rectified 277 VAC plus inductive kickback from the PFC or buck inductor, eliminating avalanche stress. CoolMOS P7's integrated Zener-protected gate improves ESD robustness during handling and field installation, which is critical for lighting products that may be touched by end users. The device's low reverse-recovery charge (Qrr) of the body diode minimizes dead-time loss in transition-mode (DCM/BCM) PFC stages used in 25-100 W LED luminaires. Its thermal performance in PG-SOT223 with a properly sized copper pour (>=25 mm^2) supports continuous operation at elevated ambient temperatures common in ceiling fixtures.
Recommended
Smart Meter Auxiliary Power Supply
The IPN95R3K7P7ATMA1 is well-suited for the auxiliary supply rails inside single-phase and three-phase smart electricity meters, where the device operates from the rectified 230/400 VAC bus and produces a small isolated 5-12 V rail for the meter's MCU, communication module, and metrology circuitry. The 950 V rating provides outstanding surge margin for utility-side transients (lightning, switching surges up to 6 kV per IEC 61000-4-5), reducing the stress on upstream varistors. Its CoolMOS P7 super-junction structure is optimized for high efficiency at light load, directly improving the no-load standby power that utilities require for ENERGY STAR and EU EcoDesign compliance. The PG-SOT223 package fits the compact 35 mm meter form factor while providing sufficient thermal margin for continuous operation at 70 C ambient.
Recommended
Industrial Auxiliary / Standby Supply
The IPN95R3K7P7ATMA1 fits the auxiliary standby rails of industrial equipment, motor drives, and PLCs where a small isolated supply (3-15 W) must operate from a 400-480 VAC three-phase rectified bus (peak 565-679 V). The 950 V CoolMOS P7 rating provides at least 270 V of design margin against reflected flyback spikes and short-duration line transients. Its 2 A drain current capability supports peak load transients during downstream capacitor charging without saturating the small high-frequency transformer. The PG-SOT223 surface-mount package enables automated assembly of industrial control boards while the exposed drain tab provides both electrical connection and heatsinking when tied to a copper pour. Combined with an Infineon quasi-resonant controller, designers achieve <30 mW standby power for compliance with modern industrial energy regulations.
Recommended
Solar Micro-Inverter / Power Optimizer
The IPN95R3K7P7ATMA1 supports low-power stage sections of photovoltaic micro-inverters and module-level power optimizers operating from solar panel DC bus voltages up to 60 V nominal (80 V max) but generating an auxiliary supply from a tapped inductor on the main switch node. Here the device's high VDS rating is overkill for primary switching but ideal for housekeeping supply duty where wide input transients are common. The CoolMOS P7 family has a proven reputation in solar applications, with low Qrr and high dv/dt ruggedness ensuring reliable operation under the long-lifetime (25-year) operating profile required for solar installations. Its PG-SOT223 form factor simplifies integration in sealed IP67-rated enclosures where component density and thermal performance are both constrained.
Recommended
Surge-Protected White Goods Power Supply
The IPN95R3K7P7ATMA1 is suited to the auxiliary SMPS sections of white goods such as washing machines, dishwashers, and refrigerators where the device operates from rectified 230 VAC mains with high exposure to switching surges from motor loads and inductive kickback. Its 950 V rating gives substantial margin beyond the typical 800 V rating of conventional MOSFETs used in this application class. CoolMOS P7's high avalanche-energy robustness provides extra safety against repetitive transient surges that would degrade standard MOSFETs over time. The PG-SOT223 package's drain tab simplifies the PCB layout for double-sided boards typical of white-goods control modules. Combined with an Infineon fixed-frequency flyback controller, the IPN95R3K7P7ATMA1 enables designs meeting IEC 60335-1 household appliance safety requirements.
Recommended
Recommended Products Summary
Engineering reference data for IPN95R3K7P7ATMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IPN95R1K2P7ATMA1 | IPN95R3K7P7 |
|---|---|---|---|
| Package | PG-SOT223 | PG-SOT223 - same | PG-SOT223 - same |
| Brand | Infineon | Infineon | Infineon |
| VDS Rating | 950 V | 950 V | 950 V |
| Continuous Drain Current (ID) | 2.0 A | Higher (per datasheet) | 2.0 A |
| RDS(on) max @ VGS=10V | 3700 mOhm | 1200 mOhm | 3700 mOhm |
| Technology | CoolMOS P7 super-junction | CoolMOS P7 super-junction | CoolMOS P7 super-junction |
Key Differentiators
- 950 V VDS with super-junction technology (vs Standard 800 V planar MOSFETs)
- Lower RDS(on) in same SOT-223 footprint (vs IPN95R3K7P7ATMA1 vs. IPN95R1K2P7ATMA1)
- Infineon CoolMOS P7 family reputation (vs Generic 950 V MOSFETs from lesser-known vendors)
Design Notes
Estimated: with Pd=6 W and a minimum-footprint PCB, junction temperature rise is approximately 65 C/W * 6 W = 390 C above ambient, which exceeds the 150 C junction limit. A copper pour of >=25 mm^2 attached to the SOT-223 drain tab reduces RthJA to roughly 45 C/W, which at 6 W still produces a 270 C rise above ambient. The IPN95R3K7P7ATMA1 is therefore intended for switching applications where conduction loss is much lower than 6 W (typical SMPS duty cycles keep average dissipation at 0.5-2 W). Adequate thermal relief and a thermally conductive PCB are essential.
Solder the SOT-223 drain tab directly to a copper pour on the top layer to maximize thermal dissipation. Use multiple thermal vias to the bottom or inner copper plane for additional heat spreading. Per Infineon layout guidelines, the source pin (pin 3) should connect to the low-side gate-drive return with a short trace to minimize common-source inductance that would otherwise slow switching and increase ringing. Keep the gate-loop area (gate-driver output to gate to source return) as small as physically possible to control EMI and gate-oscillation risk.
Do not assume 3700 mOhm RDS(on) at low VGS. The IPN95R3K7P7ATMA1 datasheet specifies RDS(on) at VGS=10 V; driving at VGS=5 V may double the on-resistance and dramatically increase conduction loss. Do not exceed the safe operating area by switching high currents at high VDS simultaneously - refer to the datasheet SOA curve. Always include a gate-source resistor (>=10 kOhm) to prevent floating-gate turn-on during high dv/dt events, and add a small RC snubber if the application experiences ringing beyond 80% of the VDS rating.
Per Infineon's 950 V CoolMOS P7 application notes, keep the gate-drive loop separate from the drain-source switching loop on the PCB to prevent capacitive coupling that perturbs the gate signal. Use a Kelvin source connection when possible - route the source sense back to the controller's GND pin rather than sharing the high-current source trace. This reduces the effective common-source inductance by 50-80% and enables cleaner switching edges.
Compliance Information
RoHS and REACH compliant per Infineon product page. Not AEC-Q100 qualified - this part is not intended for automotive powertrain applications. Halogen-free per Infineon policy.
