SM91801AL-E
PCB Transformer, BMS - Battery Management System, Planar, Single Primary, Single Secondary
- Manufacturer: BOURNS
- Product type: PCB Transformers
- SVHC: No SVHC (25-Jun-2025)
- Power Rating: -
- Winding Type: Single Primary, Single Secondary
- Product Range: SM91801 Series
- Current Rating: -
- Frequency Range: -
- Primary Voltages: -
- Isolation Voltage: 4.3kV
- Secondary Voltages: -
- PCB Transformer Type: BMS - Battery Management System, Planar
- Transformer Mounting: Surface Mount
| Delivery and price | |
|---|---|
| Units per pack | 500 |
| Price | 1.7 € |
| Current stock | 1000+ |
| Lead time | 30 days |
## **Features**
- n Clearance distance 5 mm minimum up to 5000 m altitude, pollution degree 2, material group CTI I
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n Planar technology primarily for BMS to 5000 m altitude, pollution degree 2,<br>signal applications material group CTI I<br>n Working voltage: up to 1000 VDC n Developed for use with Analog Device’s<br>n Hi-Pot: 4300 VDC or 2500 VAC LTC6815 series, NXP’s MC33771C<br>n Basic insulation compliant with series and Texas Instruments'<br>IEC 60664/62368-1 model BQ79616<br>n Creepage distance 5 mm minimum, n AEC-Q200 compliant<br>overvoltage category II n RoHS compliant* and halogen free**<br>SM91801AL BMS Planar Transformer<br>BOURNS (i<br>*RoHS and<br>AEC-Q200 COMPLIANT<br>**----- End of picture text -----**<br>
## ~~**Additional Information**~~
Click these links for more information:
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## ~~**Electrical Specifications @ 25 °C**~~
OCL (100 kHz / 0.1 V) (-40 °C to #125 °C)... 150~450 Leakage Inductance (100 kHz / 0.1 V) vecssseteeseseseee 1.2 UH max. (0.82 UH DCR
## ~~**Product Dimensions**~~
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8.50 ± 0.40<br>(.335 ± .016)<br>PIN 6<br>| fr EPOXY<br>14.00 ± 0.25<br>(.551 ± .010)<br>YYWW<br>SM91801AL 13.60 ± 0.25<br>(.535 ± .010)<br>EPOXY 7<br>y O—0—0 i |<br>See e t<br>PIN 1<br>**----- End of picture text -----**<br>
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MM<br>DIMENSIONS: —<br>(INCHES)<br>**----- End of picture text -----**<br>
Turns RatiO...... eee dt 142% Insertion Loss 4 MHZ.......0::eeeeeeeees (0.25 dB max. Return Loss A Hi-Pot (1 mA, 60 sec.) MHZ....cesseesseceseeeseeseees -16 0B min.
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Bimimin(—— -—} (.217) — 5.50 }<br>MAX.<br>Ps | 0.1<br>(.004)<br>Too +<br>0.50 ± 0.15 2.54 ± 0.15 1.30 ± 0.25<br>(.020 ± .006) JL i (.100 ± .006) (.051 ± .010) {J<br>6 PLCS.<br>| | 5.08 ± 0.15<br>a (.200 ± .006)<br>**----- End of picture text -----**<br>
per IEC 60664
## ~~**Recommended Layout**~~
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with conformal coating 1.02 ± 0.15<br>(.040 ± .006)<br>6 PLCS.<br>Operating Temperature<br>Working Voltage Voltage ............ up to 1000 VDC up to 1000 VDC to 1000 VDC 1000 VDC VDC ‘ r<br>Storage Temperature (Component) deeeeeeeetttteettteseereees 40 °C to +125 °C 40 °C to +125 °C °C to +125 °C to +125 °C +125 °C °C | [|<br>deeeeeeeetttteettteseereees 40 °C to +125 °C<br>Packaging Specification 10.45 ± 0.15 14.95 ± 0.15<br>(.411 ± .006) (.589 ± .006)<br>Moisture Sensitivity Level........0......1<br>Tape & Reel.....600 pcs. per 13-inch reel<br>How To Order<br>SM91801 A L - E<br>Model — L , | '<br>2.54 ± 0.15<br>AEC-Q200 Compliancy Designator (.100 ± .006) _<br>Termination<br>MM<br>L = Tin (RoHS Compliant) DIMENSIONS:<br>(INCHES)<br>Packaging<br>E = 600 pcs. per 13-inch Reel<br>**----- End of picture text -----**<br>
with conformal coating Operating Temperature Working Voltage Voltage ............ up to 1000 VDC up to 1000 VDC to 1000 VDC 1000 VDC VDC Storage Temperature (Component) deeeeeeeetttteettteseereees 40 °C to +125 °C 40 °C to +125 °C °C to +125 °C to +125 °C +125 °C °C
## ~~**Electric Schematic**~~
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1 6<br>2 5<br>3 — _— 4<br>Agency Recognition<br>Agency Category File No.<br>UL UL62368-1 E515965<br>Pf<br>Asia-Pacific: BOURNS Tel: +886-2 2562-4117 ®<br>Email: asiacus@bourns.com<br>EMEA: Tel: +36 88 885 877<br>Email: eurocus@bourns.com<br>The Americas: Tel: +1-951 781-5500<br>Email: americus@bourns.com<br>www.bourns.com<br>**----- End of picture text -----**<br>
## **WARNING Cancer and Reproductive Harm** www.P65Warnings.ca.gov
- RoHS Directive 2015/863, Mar 31, 2015 and Annex.
- ** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
## **SM91801AL BMS Planar Transformer**
## ~~**Reflow Solder Profile**~~
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tp<br>TP CRITICAL ZONE<br>RAMP-UP TL TO TP<br>TL<br>TS MAX. t L<br>TS MIN.<br>ts<br>PREHEAT RAMP-DOWN<br>25 °C<br>t 25 °C TO PEAK<br>Time<br>Temperature<br>**----- End of picture text -----**<br>
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Profile Feature Pb-Free Assembly<br>**----- End of picture text -----**<br>
|**Profile Feature**|**Pb-Free Assembly**|
|---|---|
|Average Ramp-Up Rate|3 °C / second max.|
|PREHEAT:<br>Temperature Min. (Tsmin)<br>Temperature Max. (Tsmax)<br>Time (Tsminto Tsmax)|150 °C<br>200 °C<br>60~180 seconds|
|Liquidus Temperature (TL)|217 °C|
|Time Above Liquidus<br>Temperature (tL)|60~150 seconds|
|Peak Temperature (Tp)|245-250 °C|
|Time within 5 °C of Actual Peak<br>Temperature (tp)|20~40 seconds|
|Ramp-Down Rate from Peak<br>Temperature|6 °C / second max|
|Time 25 °C to Peak Temperature<br>(Tp)|8 minutes max.|
|Do Not Exceed|250 °C|
Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
## **SM91801AL BMS Planar Transformer**
## ~~**Packaging Specifications**~~
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30.4<br>(1.120) [MAX.]<br>1.5<br>MIN.<br>(.059)<br>20.2 MIN. DIA.<br>(.795)<br>330.0 ± 2.0<br>DIA.<br>(12.992 ± .079)<br>100.0 ± 2.0<br>(3.937 ± .039) 13.2 ± 0.2<br>DIA. (.520 ± .008) DIA.<br>“A” 24.4 +2.0/-0<br>(.961 +.079/-0) DETAIL A<br>4.00 16.00<br>END (.157) (.630) START<br>24.00<br>(.945)<br>TRAILER COMPONENTS LEADER<br>NO COMPONENT NO COMPONENT<br>160 400<br>(6.299) (15.748)<br>MIN. MIN.<br>USER DIRECTION OF FEED<br>QTY: 600 PCS. PER REEL<br>MM<br>DIMENSIONS:<br>(INCHES)<br>SM91801AL SM91801AL<br>YYWW YYWW<br>**----- End of picture text -----**<br>
REV. 02/24
Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
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Updated at April 16, 2026
Bourns, Inc. is a globally recognized manufacturer of high-reliability electronic components, headquartered in Riverside, California. Renowned for its engineering excellence, the company delivers critical solutions across a diverse range of demanding markets, including automotive, industrial, consumer electronics, telecommunications, and medical equipment. The Bourns product portfolio is anchored by an industry-leading selection of passive components and circuit protection devices. The brand is particularly dominant in magnetic components, offering thousands of high-performance power inductors, alongside specialized RF and toroidal inductors engineered for optimized power management and signal integrity. Equally prominent is their comprehensive suite of circuit protection solutions. This robust lineup features a vast array of standard and resettable fuses, transient voltage suppressors (including TVS varistors and diodes), and gas discharge tubes (GDTs) designed to rigorously safeguard sensitive electronics against overvoltage and overcurrent faults. Beyond its core passives and protection technologies, Bourns manufactures highly effective EMC and RFI suppression components, such as common mode chokes and power line filters. The company's offering also extends into discrete semiconductors and power management, including Schottky diodes, fast recovery rectifiers, bridge rectifiers, and board-level transformers. This expansive breadth of quality components provides design engineers with a trusted foundation for developing resilient, efficient, and long-lasting electronic systems.
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