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STMicroelectronics STP5NK50ZFP
- Part No.:
- STP5NK50ZFP
- Manufacturer:
- STMicroelectronics
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
STP5NK50ZFP.pdf
- Description:
- MOSFET N-CH 500V 4.4A TO220FP
- Quantity:
- Payment:
- Shipping:
Inventory:839
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Product details
Overview
STP5NK50ZFP from STMicroelectronics is a Zener-protected N-channel 500 V, 1.22 Ω typ. SuperMESH™ Power MOSFET in TO-220FP package, rated for 4.4 A continuous drain current at 25 °C and optimized for high-voltage switching in offline SMPS and AC-DC adapters.
For engineers reviewing the STP5NK50ZFP datasheet, STP5NK50ZFP pinout, STP5NK50ZFP application, or STP5NK50ZFP equivalent, key selection criteria include its 500 V VDS, 1.22 Ω RDS(on) typ., 25 W total dissipation (TO-220FP), 100% avalanche tested rating, and built-in gate-source Zener protection.
Technical Context
This device employs ST's SuperMESH™ trench-gate technology to achieve reduced on-resistance while maintaining high dv/dt immunity (4.5 V/ns) and robust unclamped inductive switching capability. Its intrinsic capacitances-Ciss = 535 pF, Coss = 75 pF, Crss = 17 pF-support fast, low-loss switching in hard-switched topologies.
The integrated back-to-back gate-source Zener diodes (±30 V breakdown) eliminate external ESD protection components, and the source-drain diode exhibits 1.6 V forward voltage at 4.4 A with 310 ns reverse recovery time and 1.425 µC Qrr, enabling reliable operation in flyback and resonant converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 500 V - supports primary-side switching in universal-input (85–265 VAC) offline power supplies |
| RDS(on) typ. | 1.22 Ω - enables low conduction loss at 4.4 A, reducing thermal stress in compact TO-220FP layouts |
| PTOT (TO-220FP) | 25 W - defines maximum steady-state power handling with heatsink; limited by 5 °C/W junction-case thermal resistance |
| Qg | 20–28 nC - determines gate drive energy requirement; compatible with standard 10 V logic-level drivers |
| EAS | 130 mJ - quantifies single-pulse avalanche ruggedness, critical for overvoltage transients in inductive loads |
| dv/dt rating | 4.5 V/ns - ensures noise immunity and prevents spurious turn-on in high-speed, high-voltage switching nodes |
| V(BR)GSO | ±30 V - provides self-contained gate protection against ESD and overvoltage, eliminating external Zener clamps |
Pinout & Package
STP5NK50ZFP uses the TO-220FP (Full-Pak) package: insulated plastic case with integral heatsink tab, 3-pin vertical mounting, and creepage/clearance optimized for high-voltage isolation. Thermal resistance junction-to-case is 5 °C/W; insulation withstand voltage is 2.5 kV RMS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D (Drain) | Main high-voltage current path | Connected to primary rail (e.g., rectified AC line); electrically tied to heatsink tab in TO-220FP |
| G (Gate) | Control electrode | Receives 10 V logic-level signal; protected by ±30 V Zener clamp to prevent ESD damage |
| S (Source) | Reference node and current return | Common return for gate drive and load current; forms low-impedance path for source-drain diode conduction |
Key Features
| Feature | Design Value |
|---|---|
| 100% avalanche tested | Guarantees minimum 130 mJ single-pulse avalanche energy (EAS) under defined test conditions |
| SuperMESH™ trench technology | Delivers 1.22 Ω RDS(on) typ. at 500 V, improving efficiency vs. prior PowerMESH™ generation |
| Zener-protected gate | Integrated ±30 V gate-source Zener eliminates need for external clamping components in cost-sensitive designs |
| Low intrinsic capacitance | Ciss = 535 pF and Crss = 17 pF reduce switching losses and improve EMI behavior in MHz-range SMPS |
| High dv/dt immunity | Rated 4.5 V/ns ensures stable operation during fast voltage transients without false triggering |
Applications
| Offline AC-DC Adapters | Flyback SMPS |
|---|---|
Use Scenario: 12–24 V output, 30–60 W universal-input (85–265 VAC) wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Primary-side high-voltage switch in discontinuous conduction mode (DCM) flyback converter. Use Value: 1.22 Ω RDS(on) minimizes conduction loss at full load; 130 mJ EAS absorbs leakage inductance spikes during MOSFET turn-off. | Use Scenario: Isolated 5 V/2 A auxiliary supply in industrial PLCs with wide input range and tight safety isolation. IC Role / Device Role / Timing Role: Main power switch operating at 65 kHz with ZVS-assisted turn-on and snubberless operation. Use Value: 4.5 V/ns dv/dt rating prevents false triggering from transformer ringing; TO-220FP insulation (2.5 kV RMS) meets reinforced isolation requirements. |
| LED Driver Ballasts | Industrial Motor Starters |
Use Scenario: Constant-current LED driver for street lighting (100–200 V DC bus, 350 mA–1 A output). IC Role / Device Role / Timing Role: High-side switch in buck-boost or SEPIC topology controlling average LED current via PWM dimming. Use Value: Low Qg (20–28 nC) enables efficient 1–10 kHz dimming control; source-drain diode (1.6 V @ 4.4 A) handles reverse recovery in continuous conduction. | Use Scenario: Solid-state relay module for 3-phase motor contactor replacement in HVAC compressors (400 VAC line). IC Role / Device Role / Timing Role: Snubberless switching element in zero-crossing AC switch configuration with optocoupler-isolated gate drive. Use Value: 500 V VDS withstands peak line voltage + surge; 100% avalanche testing ensures reliability during motor stall or short-circuit events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage N-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP5NK50Z | Same die, TO-220 (non-insulated) package; Rthj-case = 1.78 °C/W vs. 5 °C/W for TO-220FP | Requires external insulating pad for heatsink mounting; higher thermal performance but lower isolation | Select when thermal budget is tighter and isolation is handled externally |
| STD5NK50ZT4 | DPAK package; RDS(on) = 1.5 Ω max (vs. 1.5 Ω max for STP5NK50ZFP); PTOT = 70 W (ID = 4.4 A) but derated to ~2.5 A in surface-mount layout | Suitable for space-constrained PCBs; lacks integral heatsink tab and 2.5 kV isolation | Select when board area is constrained and thermal management uses copper pour + airflow |
Compared with STP5NK50ZFP, STP5NK50Z offers superior thermal resistance but no isolation, while STD5NK50ZT4 trades off ruggedness and isolation for compact SMT assembly-making STP5NK50ZFP optimal where safety-rated insulation and moderate power density are both required.
Availability
STP5NK50ZFP is available at Aetrix Electronics and suitable for offline AC-DC adapters, flyback SMPS, and industrial motor starters requiring stable component supply, long-term lifecycle support, and certified high-voltage isolation.
Supply support for STP5NK50ZFP 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
STP5NK50ZFP belongs to the SuperMESH™ Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in 500 V-class offline power conversion systems where avalanche ruggedness and gate protection are critical.
FAQ
What is the maximum continuous drain current for STP5NK50ZFP at 100 °C case temperature?
The maximum continuous drain current (ID) is 2.7 A at TC = 100 °C, as specified in Table 1 of DS2834 Rev 6. This derating reflects thermal limits imposed by the TO-220FP package's 5 °C/W junction-to-case resistance and 150 °C maximum junction temperature.
Does STP5NK50ZFP require an external gate Zener diode?
No. STP5NK50ZFP integrates back-to-back gate-source Zener diodes with ±30 V breakdown voltage (Table 8), providing inherent ESD and overvoltage protection. External clamping is unnecessary unless system-level transients exceed this rating.
How does the TO-220FP package differ electrically from standard TO-220 in STP5NK50ZFP?
TO-220FP features an insulated plastic body with creepage/clearance compliant to 2.5 kV RMS insulation withstand voltage (Table 1), whereas standard TO-220 requires external insulation. Electrically, TO-220FP has higher thermal resistance (5 °C/W vs. 1.78 °C/W), limiting its PTOT to 25 W vs. 70 W for TO-220.
Can STP5NK50ZFP be used in synchronous rectification topologies?
No. STP5NK50ZFP is a standard N-channel enhancement-mode MOSFET with non-optimized body diode characteristics (trr = 310 ns, Qrr = 1.425 µC). It lacks the low-Qrr, fast-recovery body diode required for synchronous rectification; dedicated SR controllers or logic-level FETs with optimized diodes should be used instead.
STP5NK50ZFP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- SuperMESH™
- Package/Case:
- TO-220-3 Full Pack
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 500 V
- Current - Continuous Drain (Id) @ 25°C:
- 4.4A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 1.5Ohm @ 2.2A, 10V
- Vgs(th) (Max) @ Id:
- 4.5V @ 50µA
- Gate Charge (Qg) (Max) @ Vgs:
- 28 nC @ 10 V
- Vgs (Max):
- ±30V
- Input Capacitance (Ciss) (Max) @ Vds:
- 535 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 70W (Tc)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FP
STP5NK50ZFP FAQ
1.How can I place an order for STP5NK50ZFP through Aetrix?
Please submit a Request for Quotation (RFQ) for STP5NK50ZFP 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 STP5NK50ZFP reliable?
The price and inventory of STP5NK50ZFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP5NK50ZFP is usually 5 days.
3.What payment methods are accepted for STP5NK50ZFP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP5NK50ZFP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STP5NK50ZFP?
STP5NK50ZFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STP5NK50ZFP 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 STP5NK50ZFP?
For technical support, including STP5NK50ZFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP5NK50ZFP requirements.
6.How does Aetrix verify that STP5NK50ZFP is sourced from the original manufacturer or authorized distributors?
All STP5NK50ZFP 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 STP5NK50ZFP meets industry standards.
7.What is the process for return or replacement of STP5NK50ZFP?
All STP5NK50ZFP units undergo pre-shipment inspection (PSI). If there is an issue with STP5NK50ZFP, 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 STP5NK50ZFP part is unused and in its original packaging.
Return procedure for STP5NK50ZFP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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