FAIRCHILD INDUSTRIAL PROD T5700-90 Hydraulics Pneumatics

( Brand: Fairchild Industrial Prod ), ( Manufacturer Part Number: T5700-90 ), ( Part Type: Hydraulic Pneumatic )

Review FAIRCHILD INDUSTRIAL PROD T570090 Used

The Fairchild Semiconductor **T5700-90** (also referenced as the **T570090**) is a high-performance, high-voltage, and high-current **MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor)** designed for demanding switching applications in power supplies, motor drives, and industrial control systems. Part of Fairchild s robust **PowerTrench** technology lineup, this device combines superior efficiency, fast switching speeds, and robust reliability to deliver exceptional performance in both linear and switching regulator circuits. The T5700-90 is optimized for high-voltage operation, with a **drain-source voltage rating of 900 volts**, making it ideal for applications requiring stringent isolation and high-power handling, such as in inverter circuits, DC-DC converters, and high-voltage motor control. Its **N-channel enhancement-mode architecture** ensures low on-resistance (RDS(on)) when fully enhanced, minimizing conduction losses and improving overall system efficiency. The MOSFET s **fast switching characteristics**, including low gate charge and minimal switching times, reduce electromagnetic interference (EMI) and enable higher-frequency operation, which is critical for compact and high-performance power designs. Additionally, the T5700-90 features an integrated **body diode** with low reverse recovery time, enhancing its suitability for synchronous rectification applications where fast diode switching is essential. Built with Fairchild s advanced **PowerTrench** process, this MOSFET incorporates a trench isolation structure that reduces parasitic capacitance and improves thermal performance, allowing for better heat dissipation and extended operational lifespans even under heavy loads. The device is housed in a **TO-220AB package**, a standard yet robust form factor that facilitates efficient heat sinking and easy integration into printed circuit boards (PCBs). With its combination of high-voltage tolerance, low conduction and switching losses, and reliability under harsh conditions, the T5700-90 is a versatile choice for engineers seeking a high-performance MOSFET that balances efficiency, durability, and ease of use in a wide range of power electronic systems.

### **Pros and Cons of buying a Fairchild Power Semiconductor T5700-90 (T570090) MOSFET**

The **Fairchild T5700-90** is a high-voltage, high-side N-channel MOSFET commonly used in power supply applications, motor drives, and switching regulators. Below is a detailed analysis of its advantages and disadvantages.

---

### **Pros**

1. **High Voltage Rating (900V)**

- Suitable for high-voltage applications (e.g., 48V, 72V, or 96V bus systems) where standard low-voltage MOSFETs would fail.

- Reduces the need for multiple series MOSFETs or complex gate drive circuits in high-voltage designs.

2. **Low On-Resistance (RDS(on) 1.2 VGS 10V)**

- Efficient conduction with relatively low power loss when fully enhanced, making it suitable for medium to high current applications.

- Reduces heat generation compared to higher RDS(on) alternatives.

3. **Fast Switching Speed**

- Low gate charge (Qg 120nC) and fast switching characteristics improve efficiency in high-frequency applications (e.g., DC-DC converters, inverters).

- Minimizes switching losses, which is critical in power-dense designs.

4. **Rugged Construction**

- Designed for industrial and automotive-grade reliability, with robust packaging (TO-247 or TO-220 variants) that handles thermal stress well.

- Suitable for environments with transient voltage spikes or inductive loads.

5. **Wide Availability & Cost-Effective**

- A mature, widely stocked component from a reputable manufacturer (Fairchild), reducing procurement risks.

- Often cheaper than newer or specialized MOSFETs with similar specs.

6. **Complementary Pair Availability**

- Fairchild offers a low-side counterpart (e.g., T5700-90 paired with a low-side MOSFET like the T5700-90L) for half-bridge or full-bridge designs.

- Simplifies design symmetry in bidirectional power flow applications.

7. **Good Thermal Performance**

- The TO-247 package provides better thermal dissipation than smaller SMD packages, reducing the need for complex heatsinking in many cases.

- Suitable for applications where the MOSFET operates in the moderate to high power range.

8. **Proven in High-Power Applications**

- Used in motor drives, solar inverters, and industrial power supplies, indicating reliability in demanding scenarios.

- Fairchild s legacy in power semiconductors ensures consistent performance and availability of datasheets/design guides.

---

### **Cons**

1. **Higher RDS(on) Compared to Advanced MOSFETs**

- Modern wide-bandgap (WBG) MOSFETs (e.g., GaN or SiC) or newer silicon MOSFETs (e.g., CoolMOS, SuperJunction) often have **RDS(on)

- The T5700-90 may generate more heat in high-power applications, requiring larger heatsinks.

2. **Limited Current Rating**

- The **maximum drain current (Id) is 15A continuous** (derated above 25 C). For higher currents, parallel operation or a higher-current MOSFET (e.g., T5700-120) may be needed.

- Not ideal for very high-power applications without additional cooling.

3. **Gate Charge Considerations**

- While the gate charge is low for a 900V MOSFET, it is higher than some modern alternatives, which can increase gate drive power in high-frequency circuits.

- Requires careful gate driver selection to minimize switching losses.

4. **Sensitivity to Gate Voltage**

- The **threshold voltage (Vgs(th)) is typically 2 4V**, meaning it may not fully enhance at low gate drive voltages (e.g., 5V logic levels). A **10V or 12V gate driver** is often required for optimal performance.

- Can lead to higher RDS(on) if driven with insufficient voltage, increasing conduction losses.

5. **Package Limitations**

- The **TO-247 package** is bulkier than surface-mount alternatives (e.g., TO-220, D-PAK) and may not fit in space-constrained designs.

- Requires through-hole assembly, which can be less convenient than SMD components in modern PCBs.

6. **Aging and Obsolescence Risk**

- Fairchild has discontinued some MOSFET lines in favor of newer technologies (e.g., CoolMOS, iWUR). While the T5700-90 is still available, long-term supply chain risks exist.

- Newer MOSFETs may offer better performance (e.g., lower RDS(on), higher efficiency) with similar voltage ratings.

7. **Thermal Management Required**

- Even with a TO-247 package, **derating is necessary** above 25 C. In high-power or high-ambient-temperature applications, additional heatsinking or forced cooling may be required.

- Poor thermal design can lead to premature failure or reduced lifespan.

8. **No Integrated Protection Features**

- Unlike some modern MOSFETs, the T5700-90 lacks built-in **body diode protection, overcurrent sensing, or integrated gate resistors**, requiring external components for robust operation.

- Users must design around potential issues like inductive kickback or ESD sensitivity.

---

### **Conclusion**

The **Fairchild T5700-90** is a **reliable, high-voltage MOSFET** well-suited for **medium-power applications** where cost, availability, and moderate efficiency are prioritized. It excels in **48V 96V bus systems, motor drives, and industrial power supplies** where its **900V rating and 1.2 RDS(on)** provide a balance of performance and cost.

However, for **high-current, high-efficiency, or space-constrained designs**, newer MOSFETs (e.g., **CoolMOS, SuperJunction, or GaN**) may offer **better RDS(on), faster switching, and smaller packages**. Additionally, the **TO-247 package and gate drive requirements** make it less ideal for **high-frequency or low-voltage applications**.

If **long-term availability and proven reliability** are critical, the T5700-90 remains a **solid choice**. But for **cutting-edge efficiency or miniaturization**, evaluating alternatives is advisable.

---

### **Recommendation**

- You need a **900V, 15A MOSFET** for **48V 96V systems** (e.g., EV charging, industrial motor control).

- **Cost and availability** are priorities, and you can tolerate **moderate RDS(on) and gate drive requirements**.

- Your design **does not require ultra-high efficiency** (e.g., >98% in DC-DC converters).

- You can accommodate the **TO-247 package** and **thermal management needs**.

- You need **higher current (>20A) or lower RDS(on) (

- Your application is **high-frequency (>500kHz)** modern MOSFETs or GaN FETs will reduce switching losses.

- **Space is limited** surface-mount packages (e.g., TO-220, D-PAK) or SMD MOSFETs may be better.

- **Long-term supply chain risk** is a concern check for newer Fairchild CoolMOS or Infineon alternatives.

For **new designs**, always **compare with modern MOSFETs** to ensure optimal efficiency and reliability. For **legacy or cost-sensitive projects**, the T5700-90 remains a **practical and effective solution**.

Details:

All Products are guaranteed to be working but may show signs of use if purchasing a used Product. Call to use a shipping service other than the ones listed. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Sells new and surplus Product develops channels to purchase such.

part #: t570090 prices

• $175.00-$280.00

specifications generapneumati:

• brand: Fairchild Industrial Prod
• mpn: T5700-90
• part type: Hydraulic Pneumatic

shipping generapneumati:

• service: Standard
• transit: 24-37 Days
• cost: $12.90
• class: Standard
• type: Fixed

general generapneumati:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Other Hydraulics Pneumatics

returns generapneumati:

• policy: Returns Accepted
• paid by: Buyer
• method: Money back
• time: 30 Days

offer generapneumati:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: February 1, 2026
• quantity: 1

payments generapneumati:

• other
• wallet: Google-pay
• credit card: Mastercard

seller generapneumati:

• rating: 99.5%
• # reviews: 188285
• city: 1 Millennium Dr, Willingboro, NJ 08046

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