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| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
48,000 pcs
|
48000 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
| Category | |
| Manufacturer Name | |
| Approval Agency | |
| Body Height | |
| Body Thickness | |
| Climatic Category (IEC 60068-1) | |
| Current | |
| Delivery Mode | |
| Diameter | |
| Dissipation Factor (in air) | |
| Heat Capacity | |
| Lead Diameter | |
| Lead Length | |
| Lead Spacing | |
| Max. Power (at 25 °C) | |
| R @ 25°C | |
| Rated Temperature | |
| Thermal Cooling Time Constant (in air) | |
| Tolerance | |
| Weight |
The B57238S259M51 is a leaded NTC thermistor from TDK's S238 series designed for inrush current limiting applications. It features a resistance of 2.5 Ohm at 25°C with a tolerance of ±20% and a maximum steady state current of 8.4A. The component can dissipate up to 3.9W at 25°C, with a dissipation factor of 20 mW/K and a thermal time constant of 80 seconds.
Mechanically, the part has a 16.0mm diameter body, 7.5mm lead spacing, 6.0mm thickness, and 23.0mm height. The leads are tinned copper wire with 1.0mm diameter and 25.0mm length, and the total weight is 3 grams. The coating is flame retardant to UL 94 V-0. Delivery options include bulk, cardboard tape on reel, or ammo pack.
This inrush current limiter is suitable for switch-mode power supplies and soft-start motors. It meets the climatic category 55/170/21 (IEC 60068-1) and carries approvals from UL, IEC, VDE, and CQC. The component is rated for a temperature of 25°C for rated power.
| Qty | Low | High |
|---|---|---|
| 1+ | $2.22 | $2.22 |
| 5+ | $1.84 | $1.84 |
| 10+ | $1.70 | $1.70 |
| 50+ | $1.41 | $1.41 |
| 100+ | $1.30 | $1.30 |
| 250+ | $1.17 | $1.17 |
| 500+ | $1.08 | $1.08 |
| 1,000+ | $0.94 | $0.94 |
| 2,000+ | $0.87 | $0.87 |
| 3,000+ | $0.83 | $0.83 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The climatic category is 55/170/21, indicating an operating temperature range of -55°C to +170°C.
RoHS3 compliant (unverified).
2.5 Ohm at 25°C, ±20% tolerance.
8.4 A maximum steady state current.
16.0 mm body diameter.
UL approved; also listed for IEC, VDE, CQC.
80 seconds thermal cooling time constant in air.