PA1005.125QNLT
Current Sensing Transformer, 1:125, 3 mH, 20 A, 50kHz to 1MHz, 6.5 ohm
- Manufacturer: PULSE ELECTRONICS
- Product type: Current Sensing Transformers
- SVHC: No SVHC (04-Feb-2026)
- Inductance: 3mH
- ET Constant: -
- Turns Ratio: 1:125
- Product Range: CSFC
- Frequency Range: 50kHz to 1MHz
- Primary Current: 20A
- Transformer Mounting: Surface Mount
- DC Resistance Primary: 750µohm
- Transformer Terminals: Gull Wing
- DC Resistance Secondary: 6.5ohm
| Delivery and price | |
|---|---|
| Units per pack | 900 |
| Price | 0.94 € |
| Current stock | 1000+ |
| Lead time | 30 days |
## SMT Current Sense Transformer
_PA1005QNL Series_
_**Height** : 5.5mm Max_ _**Footprint:** 8.4mm x 7.2mm Max_ _**Current Rating:** up to 20A_ _**Frequency Range:** 50kHz to 1MHz_
## **Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°C**
|**Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°Cpecifications @ 25°C — Operating Temperature -40°C to +125°Cecifications @ 25°C — Operating Temperature -40°C to +125°C@ 25°C — Operating Temperature -40°C to +125°C 25°C — Operating Temperature -40°C to +125°Cperating Temperature -40°C to +125°Cerating Temperature -40°C to +125°Cg Temperature -40°C to +125°C Temperature -40°C to +125°Cperature -40°C to +125°Cerature -40°C to +125°C**<br>~~eeeee~~<br>~~es~~|**Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°Cpecifications @ 25°C — Operating Temperature -40°C to +125°Cecifications @ 25°C — Operating Temperature -40°C to +125°C@ 25°C — Operating Temperature -40°C to +125°C 25°C — Operating Temperature -40°C to +125°Cperating Temperature -40°C to +125°Cerating Temperature -40°C to +125°Cg Temperature -40°C to +125°C Temperature -40°C to +125°Cperature -40°C to +125°Cerature -40°C to +125°C**<br>~~eeeee~~<br>~~es~~|**Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°Cpecifications @ 25°C — Operating Temperature -40°C to +125°Cecifications @ 25°C — Operating Temperature -40°C to +125°C@ 25°C — Operating Temperature -40°C to +125°C 25°C — Operating Temperature -40°C to +125°Cperating Temperature -40°C to +125°Cerating Temperature -40°C to +125°Cg Temperature -40°C to +125°C Temperature -40°C to +125°Cperature -40°C to +125°Cerature -40°C to +125°C**<br>~~eeeee~~<br>~~es~~|**Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°Cpecifications @ 25°C — Operating Temperature -40°C to +125°Cecifications @ 25°C — Operating Temperature -40°C to +125°C@ 25°C — Operating Temperature -40°C to +125°C 25°C — Operating Temperature -40°C to +125°Cperating Temperature -40°C to +125°Cerating Temperature -40°C to +125°Cg Temperature -40°C to +125°C Temperature -40°C to +125°Cperature -40°C to +125°Cerature -40°C to +125°C**<br>~~eeeee~~<br>~~es~~|**Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°Cpecifications @ 25°C — Operating Temperature -40°C to +125°Cecifications @ 25°C — Operating Temperature -40°C to +125°C@ 25°C — Operating Temperature -40°C to +125°C 25°C — Operating Temperature -40°C to +125°Cperating Temperature -40°C to +125°Cerating Temperature -40°C to +125°Cg Temperature -40°C to +125°C Temperature -40°C to +125°Cperature -40°C to +125°Cerature -40°C to +125°C**<br>~~eeeee~~<br>~~es~~|**Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°Cpecifications @ 25°C — Operating Temperature -40°C to +125°Cecifications @ 25°C — Operating Temperature -40°C to +125°C@ 25°C — Operating Temperature -40°C to +125°C 25°C — Operating Temperature -40°C to +125°Cperating Temperature -40°C to +125°Cerating Temperature -40°C to +125°Cg Temperature -40°C to +125°C Temperature -40°C to +125°Cperature -40°C to +125°Cerature -40°C to +125°C**<br>~~eeeee~~<br>~~es~~|**Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°Cpecifications @ 25°C — Operating Temperature -40°C to +125°Cecifications @ 25°C — Operating Temperature -40°C to +125°C@ 25°C — Operating Temperature -40°C to +125°C 25°C — Operating Temperature -40°C to +125°Cperating Temperature -40°C to +125°Cerating Temperature -40°C to +125°Cg Temperature -40°C to +125°C Temperature -40°C to +125°Cperature -40°C to +125°Cerature -40°C to +125°C**<br>~~eeeee~~<br>~~es~~|
|---|---|---|---|---|---|---|
|Part5,6<br>Number|Turns<br>Ratio<br>~~a~~<br>~~es~~<br>~~es~~|Current2<br>Rating<br>(A)<br>~~a~~<br>~~rs~~|Secondary<br>Inductance<br>(mH MIN)<br>~~a~~<br>~~ee~~|DCR (mΩMax)<br>~~a~~<br>~~eee~~||Hipot<br>(VRMS)|
|||||Primary<br>(8-7)<br>~~a~~<br>~~eee~~|Secondary<br>(1-3)<br>~~a~~<br>~~eee~~||
|PA1005.020QNL|1:20<br>~~a~~<br>~~es~~<br>~~es~~<br>~~es~~|20<br>~~a~~<br>~~rs~~<br>~~re~~<br>|0.08<br>~~a~~<br>~~ee~~<br>~~es~~<br>|0.75<br>~~a~~<br>~~eee~~<br>~~es~~|550<br>~~a~~<br>~~eee~~|900|
|PA1005.030QNL|1:30<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|20<br>~~rs~~<br>~~re~~<br>~~rs~~<br>|0.18<br>~~ee ~~<br>~~es~~<br>~~ns~~|0.75<br> ~~eee~~<br>~~es~~|870<br>~~eee~~|900|
|PA1005.040QNL|1:40<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|20<br>~~rs~~<br>~~re~~<br>~~rs~~<br>~~es~~|0.32<br>~~es~~<br>~~ns~~|0.75<br>~~es~~|1140|900|
|PA1005.050QNL|1:50<br>~~es ~~<br>~~es~~<br>~~es~~<br>~~es~~|20<br>~~re~~<br> ~~rs~~<br>~~es~~<br>~~rs~~|0.50<br>~~es~~<br>~~ns~~|0.75<br>~~es~~|1500|900|
|PA1005.060QNL|1:60<br> <br>~~es ~~<br>~~es~~<br>~~es~~<br>~~es~~|20<br> ~~rs~~<br> ~~es~~<br>~~rs~~<br>~~re~~<br>|0.72<br>~~ns~~<br>~~es~~<br>|0.75<br>~~es~~|2250|900|
|PA1005.070QNL|1:70<br> <br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|20<br> ~~es~~<br>~~rs~~<br>~~re~~<br>~~rs~~<br>|0.98<br>~~es~~<br>~~ns~~|0.75<br>~~es~~|4750|900|
|PA1005.100QNL|1:100<br>~~es~~<br>~~es~~<br>~~es es~~|20<br>~~rs~~<br>~~re~~<br>~~rs~~<br>~~es~~|2.00<br>~~es~~<br>~~ns~~|0.75<br>~~es~~|5500|900|
|PA1005.125QNL|1:125<br>~~es ~~<br>~~es es~~|20<br>~~re~~<br> ~~rs~~<br>~~es~~|3.00<br>~~es~~<br>~~ns~~|0.75<br>~~es~~|6500|900|
|~~rsns~~<br>~~es es~~|||||||
## **NOTES:**
1. The temperature of component (ambient temperature plus temper-ature rise) must be within the specified operating temperature range.
2. The maximum current rating is based upon temperature rise of the component and represents the DC current which will cause a typical temperature rise of 40°C with no airflow when both one turn windings connected in parallel.
5. Optional Tape & Reel packaging can be ordered by adding a “ **T** ” suffix to the part number (i.e. PA1005.020QNL becomes PA1005.020QNL **T** ). Pulse complies to industry standard tape and reel specification EIA481.
- The “ **NL** ” suffix indicates an RoHS-compliant part number.
6.
3. To calculate value of terminating resistor (Rt) use the following formula:
- Rt (W) = Vref * N / (Ipeak_primary)
4. The peak flux density of the device must remain below 2000 Gauss. To calculate the peak flux density for uni-polar current use following formula:
- Bpk = 37.59 * Vref * (Duty_Cycle_Max) * 10[5] / (N * Freq_kHz)
- for bi-polar current applications divide Bpk (as calculated above) by 2.
P790.G (11/23)
Pulseelectronics.com
1
## SMT Current Sense Transformer
_PA1005QNL Series_
## **Mechanical**
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Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.34 grams Dimensions: [Inches]<br>Tray. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120/tray mm<br>Tape & Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900/reel Unless otherwise specified, all tolerances are ± [ .010 ]<br>Coplanarity. . . . . . . . . . . . . . . . . . . . . . . . . . .0.004 inches 0,25<br>**----- End of picture text -----**<br>
**TAPE & REEL INFO**
|PART NUMBER|REEL SIZE(mm)|REEL SIZE(mm)|TAPE SIZE(mm)|TAPE SIZE(mm)|TAPE SIZE(mm)|QTY|
|---|---|---|---|---|---|---|
||A|G|P1|W|K|K0<br>PCS/REEL|
|PA1005.XXXQNLT|Ø330|16.4|12|16|5.65|5.65<br>900|
## For More Information
**Americas -** prodinfo_power_americas@yageo.com | **Europe -** prodinfo_power_emea@yageo.com | **Asia -** prodinfo_power_asia@yageo.com
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. © Copyright, 2023. Pulse Electronics, Inc. All rights reserved.
YAGEO Corporation and its affiliates do not recommend the use of commercial or automotive grade products for high reliability applications or manned space flight.
P790.G (11/23)
Pulseelectronics.com
Updated at June 4, 2026
Pulse Electronics, a YAGEO company, is a global leader in the design and manufacturing of passive electronic components. With a legacy of innovation dating back to 1956, the company provides essential technology for the communications, computing, industrial, transportation, and IoT sectors. Pulse is recognized worldwide for delivering high-performance solutions that power advanced applications, ranging from 5G networks and electric vehicles to data centers and smart grids. The company's extensive product portfolio is heavily anchored in power and networking magnetics. This includes a comprehensive range of power inductors engineered for exceptional efficiency and reliability in demanding environments. To address complex electromagnetic compatibility challenges, Pulse also manufactures highly effective EMC and RFI suppression solutions, such as common mode chokes and filters, alongside specialized toroidal and RF inductors designed to ensure clean power delivery and optimal signal integrity. Beyond traditional magnetics, Pulse excels in the development of advanced wireless and power conversion components. Their connectivity solutions feature a wide array of high-performance RF antennas and single-band chip antennas tailored for modern connected devices. Furthermore, to support sophisticated power architectures, Pulse provides a broad spectrum of transformers—encompassing PCB-mounted designs, current sensing transformers, and precise pulse transformers—equipping engineers with robust, industry-proven components for power isolation and measurement.
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