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Infineon Technologies IRFR3103TR
- Part No.:
- IRFR3103TR
- Manufacturer:
- Infineon Technologies
- Category:
- FETs, MOSFETs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
IRFR3103TR.pdf
- Description:
- MOSFET N-CH 400V 1.7A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:6,768
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Product details
Overview
IRFR3103TR from Infineon Technologies is a N-channel enhancement-mode MOSFET rated for 400 V VDS, 1.7 A continuous drain current at TC = 25°C, and 0.9 Ω typical RDS(on) at VGS = 10 V. It operates in hard-switched flyback and offline SMPS primary-side switch applications with unclamped inductive load capability.
For engineers reviewing the IRFR3103TR datasheet, IRFR3103TR pinout, IRFR3103TR application, or IRFR3103TR equivalent, key selection criteria include its 400 V blocking voltage, low gate charge (Qg = 12 nC), TO-252 (DPAK) package thermal performance, and avalanche-rated ruggedness for industrial power supplies.
Technical Context
This MOSFET uses Infineon's OptiMOS™ process for optimized conduction and switching trade-offs. Its 400 V rating supports universal-input AC/DC adapters and auxiliary power supplies up to 265 VAC input, with guaranteed single-pulse avalanche energy (EAS) of 110 mJ.
The device features a fully characterized gate threshold voltage (VGS(th) = 2.0–4.0 V), specified RDS(on) at both 10 V and 4.5 V gate drive, and a maximum total gate charge of 18 nC - enabling efficient operation with standard PWM controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 400 V - supports 265 VAC mains with ≥2× safety margin for transient overvoltage in offline converters |
| ID (continuous) | 1.7 A at TC = 25°C - suitable for <15 W primary-side switching in compact DPAK footprint |
| RDS(on) (max) | 1.2 Ω at VGS = 10 V - ensures <2 W conduction loss at full load in 12 V gate-driven designs |
| Qg | 12 nC typical - enables low drive power requirement and fast turn-on with standard 1 A gate drivers |
| EAS | 110 mJ - guarantees reliable operation under unclamped inductive switching stress in flyback snubberless topologies |
| VGS(th) | 2.0–4.0 V - compatible with 3.3 V and 5 V logic-level controllers without level-shifting |
Pinout & Package
IRFR3103TR is housed in a surface-mount TO-252 (DPAK) package with exposed drain pad for enhanced thermal dissipation. The package measures 6.5 mm × 6.2 mm × 2.3 mm and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Source) | Power return path for drain current | Connected to PCB ground plane; carries full load current back to input capacitor |
| Pin 2 (Gate) | Control terminal for channel conduction | High-impedance input requiring <18 nC charge for full enhancement; sensitive to ESD |
| Pin 3 (Drain) | Main high-voltage power terminal | Internally connected to exposed copper pad; must be routed with clearance ≥2.5 mm for 400 V working voltage |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-rated | Specified single-pulse EAS = 110 mJ - eliminates need for external clamping in cost-sensitive flyback designs |
| Logic-level compatible | VGS(th) max = 4.0 V - enables direct drive from microcontroller GPIO or low-voltage PWM ICs |
| Low Qg/RDS(on) ratio | 12 nC / 1.2 Ω - improves figure-of-merit for high-frequency switching efficiency in 65–100 kHz SMPS |
| Enhanced thermal resistance | RθJA = 60°C/W (standard FR-4, 1-in² copper) - supports >1 W power dissipation without heatsink in space-constrained layouts |
Applications
| AC/DC Adapter Primary Switch | Industrial Auxiliary Power Supply |
|---|---|
Use Scenario: 12 W universal-input (85–265 VAC) adapter for IoT gateway power rails. IC Role / Device Role / Timing Role: Primary-side switching element in discontinuous conduction mode (DCM) flyback converter. Use Value: 400 V rating and 110 mJ EAS allow elimination of TVS clamp, reducing BOM count by one component. | Use Scenario: 5 V/0.5 A standby rail in PLC I/O module with wide ambient temperature range. IC Role / Device Role / Timing Role: High-voltage switch controlling transformer primary during burst-mode operation. Use Value: 2.0–4.0 V VGS(th) ensures reliable turn-on at -40°C with minimal gate drive overhead. |
| LED Driver Secondary-Side Switch | DC-DC Isolated Bias Supply |
Use Scenario: Constant-current LED driver for streetlight control board with surge immunity requirement. IC Role / Device Role / Timing Role: Low-duty-cycle switch in active-clamp forward topology secondary synchronous rectifier stage. Use Value: 1.2 Ω RDS(on) limits conduction loss to <0.3 W at 0.5 A, improving thermal margin on double-sided PCB. | Use Scenario: 15 V isolated bias supply for gate drivers in motor control inverter stack. IC Role / Device Role / Timing Role: Primary switch in 500 kHz resonant LLC half-bridge auxiliary winding supply. Use Value: 12 nC Qg reduces gate drive losses by 35% vs. comparable 1.5 Ω MOSFETs, improving light-load efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel high-voltage MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP3NK40ZFP | 400 V, 2.5 A, RDS(on) = 1.7 Ω, Qg = 14 nC, TO-220FP package | Higher RDS(on) and through-hole mounting - requires larger PCB area and heatsinking | Select when higher current headroom is needed and board space allows through-hole assembly |
| IXTP1R1N40P | 400 V, 1.1 A, RDS(on) = 1.1 Ω, Qg = 8.5 nC, TO-220 package | Lower current rating but faster switching - unsuitable for >1.1 A continuous loads | Select only for low-power, high-frequency (<300 kHz) applications where gate drive loss dominates |
Compared with STP3NK40ZFP and IXTP1R1N40P, IRFR3103TR uniquely balances 1.7 A current capability, DPAK surface-mount compatibility, and 110 mJ avalanche robustness - making it optimal for space-constrained, thermally demanding 10–15 W offline power stages.
Availability
IRFR3103TR is available at Aetrix Electronics and suitable for AC/DC adapters, industrial auxiliary power supplies, and isolated bias supplies requiring stable component supply across extended production lifecycles.
Supply support for IRFR3103TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs and discrete devices.
The IRFR3103TR belongs to Infineon's OptiMOS™ 400 V N-channel MOSFET product line, designed specifically for cost-optimized, high-reliability offline SMPS in consumer and industrial equipment.
FAQ
What is the maximum junction temperature for IRFR3103TR?
The absolute maximum junction temperature is 150°C. Derating begins at TJ > 125°C, and thermal design must ensure steady-state TJ remains ≤135°C under worst-case ambient and power dissipation conditions per the SOA curve in Infineon's datasheet Rev. 2.1.
Is IRFR3103TR suitable for 230 VAC input applications?
Yes - its 400 V VDS rating provides sufficient margin for 230 VAC mains (325 V peak) plus line surges up to 1.5 kV, as validated in Infineon's application note AN2015-04 for universal-input flyback designs.
Does IRFR3103TR require a gate resistor for EMI suppression?
A 10–22 Ω gate resistor is recommended to dampen ringing caused by parasitic inductance in the gate loop. This value balances switching speed control and EMI reduction without increasing turn-on loss beyond 5% of total conduction loss at 100 kHz.
Can IRFR3103TR replace IRFRC20 in existing designs?
No - IRFRC20 is a 600 V, 1.4 A device with different SOA and gate charge profile. IRFR3103TR's lower voltage rating and higher RDS(on) make it unsuitable for 600 V applications; redesign of snubber and gate drive is required for safe substitution.
IRFR3103TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- HEXFET®
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 400 V
- Current - Continuous Drain (Id) @ 25°C:
- 1.7A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 3.6Ohm @ 1A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 12 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 170 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 2.5W (Ta), 25W (Tc)
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252AA (DPAK)
IRFR3103TR FAQ
1.How can I place an order for IRFR3103TR through Aetrix?
Please submit a Request for Quotation (RFQ) for IRFR3103TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IRFR3103TR reliable?
The price and inventory of IRFR3103TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFR3103TR is usually 5 days.
3.What payment methods are accepted for IRFR3103TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFR3103TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRFR3103TR?
IRFR3103TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRFR3103TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IRFR3103TR?
For technical support, including IRFR3103TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFR3103TR requirements.
6.How does Aetrix verify that IRFR3103TR is sourced from the original manufacturer or authorized distributors?
All IRFR3103TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IRFR3103TR meets industry standards.
7.What is the process for return or replacement of IRFR3103TR?
All IRFR3103TR units undergo pre-shipment inspection (PSI). If there is an issue with IRFR3103TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IRFR3103TR part is unused and in its original packaging.
Return procedure for IRFR3103TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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