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CST1-125L

RoHS compliant AEC-Q flag

For more information and specification about the part.

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Count Unit price
1 $2.37
250 $1.78
500 $1.19
1000 $0.99
2500 $0.89
5000 $0.81

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
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Designer's Kit:
Kit Values Price
C389 16 (2 of each) $50.00

Specifications

Electrical specifications at 25°C.

Part number 1 Inductance
min (µH) 2
DCR max (Ω) 3 Turns Ratio Volt-time
product (V-µs) 4
Frequency (kHz) Current (A) 5 Terminating
resistance RT (Ω) 6
Isolation
Voltage (Vrms) 7
Color dot
Pri Sec Pri : Sec
CST1-125L_ 3000 0.0007 6.5 1 : 125 67.5 7 1000 20.0 6.3 500 Black
Notes
  1. When ordering, please specify termination and packaging codes: e.g. CST1-125LC or CST2-125LC
  2. Inductance measured across secondary at 100 kHz, 0.1 Vrms.
  3. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  4. Maximum volt-time product for the secondary, based on 2000 gauss.
  5. Primary current of 20 A causes approximately 40°C temperature rise from 25°C ambient. Higher current causes a greater temperature rise. (see Temperature Rise vs Current curve).
  6. Terminating resistor value is based on 1 Volt output with 20 Amps flowing through the primary. Varying terminating resistance increases or decreases output Voltage/Ampere according to the following equation:
    RT (Ohms) = Vout × Nsec / Iin.
  7. 500 Vrms, one minute isolation (hipot) winding to winding.

Termination:

  • L = RoHS compliant tin-silver over tin over nickel over phos bronze (pins 1 – 6); RoHS compliant Matte tin over nickel over copper (pins 7 – 8).
  • S = non-RoHS tin-lead (63/37) over tin over nickel over phos bronze (pins 1 – 6); non-RoHS tin-lead over gold over nickel over copper (pins 7 – 8). (Special order, added cost)

Packaging:

  • C = 7" machine-ready reel
    EIA-481 embossed plastic tape (250 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
  • B = Less than full reel
    In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to C.
  • D = 13" machine-ready reel
    EIA-481 embossed plastic tape (1000 parts per full reel).
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
−40°C to +125°C
Storage temperature range:
Component: −40°C to +165°C
Tape and reel packaging: −40°C to +80°C
Maximum part temperature:
+165°C (ambient + temp rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Performance curves

Temperature vs. Current

Schematics

CST1 Series
cst1schematic.gif
Terminating resistor (RT)value is based on 1 Volt output with 20 Amps flowing through the primary. Varying terminating resistance increases or decreases output Voltage/Ampere according to the following equation: RT (Ohms) = Vout × Nsec / Iin.

CST2 Series
cst2schematic.gif

Terminating resistor (RT) value is based on 1 Volt output with 20 Amps flowing through the primary. Varying terminating resistance increases or decreases output Voltage/Ampere according to the following equation: RT (Ohms) = Vout × Nsec / Iin.

Physical characteristics

cstdimensions.gif

dims_inches_mm.gif

 

Pinouts

cst_pinouts.gif

Tape and Reel specification

csttapeandreel.gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
7" (178 mm) 13" (330 mm) A B C D E W P Po P1 H T cstorientation.gif
250 1000* 178/330 60/100 13 22,4 16,4 16 12 4 2 5,6 0,35

General specification

Core Material:
Ferrite
Weight:
0.4 g
Packaging:
250/7″reel;1000/13″ reel; Plastic tape: 16 mm wide, 0.35 mm thick, 12 mm pocket spacing, 5.6 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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