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Bel Fuse Inc.

Bel Fuse Inc.- Pulse Transformers

Bel Fuse Inc. is a global manufacturer of electronic components founded in 1949 and headquartered in Jersey City, New Jersey, USA. The company specializes in providing power, protection, and connectivity solutions for a wide range of industries. Its core product areas include circuit protection devices, power conversion modules, and high-speed connectors. The Bel Power Solutions lineup features isolated and non-isolated DC-DC converters, AC-DC power supplies, and custom power modules for networking and telecom infrastructure. Through its Bel Magnetic Solutions segment, it delivers integrated connector modules (RJ45 with magnetics), discrete transformers, and inductors critical for high-reliability data transmission. The Bel Connectors portfolio includes high-density backplane connectors, micro-miniature connectors, and harsh-environment circular connectors for demanding applications. Bel Fuse serves major clients in telecommunications, data centers, industrial automation, medical equipment, and next-generation wireless systems such as 5G and IoT. As a strategic supplier to market leaders like Cisco, Nokia, and Ericsson, the company helps engineer cutting-edge devices that enable global high-speed connectivity. With decades of innovation and vertically integrated manufacturing, Bel is recognized for its engineering excellence and robust quality management. The company trades on NASDAQ under the symbol BELFA and BELFB, underscoring its established presence in the electronic components sector.

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Pulse Transformers - 型号列表

982 parts in total

Inductance Range

Turns Ratio - Primary:Secondary

Return Loss (Min)

RF Family/Standard

DC Resistance (DCR) - Primary

Isolation

Standard Package

Crosstalk

CMRR, PSRR (Typ)

Insertion Loss (Max)

Lead Style

Depth

Height

Length - Overall

Transformer Type

Number of Contacts

Mfr Part #Quantity AvailablePriceStandard PackageIsolationInductance RangeLead StyleRF Family/StandardTurns Ratio - Primary:SecondaryReturn Loss (Min)DC Resistance (DCR) - PrimaryCMRR, PSRR (Typ)Insertion Loss (Max)CrosstalkDepthHeightMounting TypeLength - OverallTransformer TypeNumber of ContactsLead TimeSubcategoryEU RoHSCapacitance Ratio ConditionInductance - Connected In SeriesOperating Temperature
S553-5692-08B
S553-5692-08B

T1/E1 OCTAL XFMR, BULK

bel

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S553-5999-72B
S553-5999-72B

10BASE-T, AUI XFMR, BULK

bel

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S558-5999-96B
S558-5999-96B

BULK PART

bel

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S558-5999-B2
S558-5999-B2

Telecom Transformer 1CT:1CT/1:1 2000Vrms -1dB Surface Mount

bel

-Tape & Reel2000 Vrms0.35 mHGull WingS5581CT:1CT/1:1-10@60MHz to 80MHz dB--30@100MHz dB-1(Typ)@1MHz to 100MHz dB-35@1MHz to 100MHz dB------------
S553-0013-01
S553-0013-01

Telecom Transformer 1CT:2CT/1:1 1500Vrms 0.8Ohm Prim. DCR Surface Mount Telecom Transformer 1CT:2CT/1:1 0.8Ohm Prim. DCR 16Term. Gull Wing SMD

bel

10750: ¥6.751Tape & Reel1500 Vrms1.2(Min) mHGull WingS5531CT:2CT/1:1-0.8 Ohm---9.535.72Surface Mount12.7T1/CEPT Dual Line Interface Trans...16--Not Compliant350.8/0.5-
S553-1506-AE
S553-1506-AE

Telecom Transformer 1:1 2000Vrms 0.2Ohm Prim. DCR 0.2Ohm Sec. DCR Surface Mount

bel

-Tape & Reel2000 Vrms0.15(Typ) mHGull WingS5531:1-----------------
S553-6500-D6
S553-6500-D6

Telecom Transformer 1:1.14/1.14CT:1 1500Vrms 0.6Ohm/0.7Ohm Prim. DCR 0.7Ohm/0.6Ohm Sec. DCR Surface Mount

bel

-Tape & Reel1500 Vrms1.8(Min)/1.8(Min) mHGull WingS5531:1.14/1.14CT:120 dB0.6/0.7 Ohm---------------
S553-6500-F6
S553-6500-F6

Telecom Transformer 2:1 1500Vrms 2Ohm/1.3Ohm Prim. DCR 0.7Ohm Sec. DCR Surface Mount

bel

-Tape & Reel1500 Vrms1.5 mHGull WingS5532:118 dB2/1.3 Ohm---------------
S558-5999-46B
S558-5999-46B

10/100BASE-T, SINGLE XFMR MODULE, BULK

bel

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S558-5999-50
S558-5999-50

Telecom Transformer 1:1.41CT/1CT:1CT 1500Vrms -1dB Surface Mount

bel

-Tape & Reel1500 Vrms0.35 mHGull WingS5581:1.41CT/1CT:1CT-12@60MHz to 80MHz dB--30@0.1MHz to 100MHz dB-1@0.1MHz to 100MHz dB-35@100MHz dB------------
S558-5999-64B
S558-5999-64B

10/100BASE-T, SINGLE XFMR MODULE, BULK

bel

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S558-5999-E5B
S558-5999-E5B

10/100BASE-T, QUAD, 1:1/1:1, BULK

bel

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S558-5999-T4
S558-5999-T4

Telecom Transformer 1CT:1CT 1500Vrms -1dB Surface Mount Telecom Transformer 1CT:1CT 24Term. Gull Wing SMD

bel

10560: ¥18.632Tape & Reel1500 Vrms0.35 mHGull WingS5581CT:1CT-18@0.5MHz to 40MHz dB--30@0.1MHz to 100MHz dB-1@0.1MHz to 100MHz dB-19.056.35Surface Mount13.26Giga Bit Ethernet Magnetic Transf...24-----70
0553-0023-PC
0553-0023-PC

DATA COUPLING XFMR, 2:1:1

bel

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0553-1006-IC
0553-1006-IC

DATA COUPLING XFMR, 1:1:1

bel

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------------------168 DaysNot Specified----
------------------168 DaysNot Specified----
0559-6200-03
0559-6200-03

Telecom Transformer 1:1 2000Vrms 2.5Ohm Prim. DCR 4.3Ohm Sec. DCR Through Hole

bel

-Bulk2000 Vrms22(Min) mHPC Pin05591:1-2.5(Typ) Ohm---------------
1793A
1793A

Telecom Transformer 500Vrms 0.35Ohm Prim. DCR 0.35Ohm Sec. DCR Surface Mount

bel

-Tape & Reel500 Vrms0.0225(Min) mHGull Wing179------------------
2745G
2745G

Telecom Transformer 1:1.14CT 1000Vrms 0.95Ohm Prim. DCR 1.1Ohm Sec. DCR Through Hole

bel

-Rail / Tube1000 Vrms1.75(Min) mHPC Pin2741:1.14CT-0.95 Ohm---------------
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