Mfr Part #:

S558-5999-J1

Mfr Name: Bel Fuse

The Bel Fuse S558-5999-J1 is an audio/signal transformer designed for 10/100Base-T applications. It features a 350 µH inductance and SMD/SMT termination.

✓ Total Stock: 617 pcs

S558-5999-J1 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Husky International Electronic ✓ Non-Authorised Inventory information	617 pcs On Request	617 pcs	On Request	1	On Request	On Request	N/A	On Request	On Request

S558-5999-J1 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Bel Fuse
Height	5.71 mm
Inductance	350 µH
Length	12.32 mm
SVHC Present	Not Present
Termination Style	SMD/SMT
Width	7.24 mm

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S558-5999-J1 Description

Short technical summary and product information.

The Bel Fuse S558-5999-J1 is a pulse transformer categorized under audio and signal transformers. It is designed for 10/100Base-T applications, offering a key inductance value of 350 µH.

This transformer has a maximum DC resistance of 2 Ohms and specific primary and secondary resistance values of 2 Ohms and 1 Ohm, respectively. Its mechanical dimensions are 12.32 mm in length, 7.24 mm in width, and 5.71 mm in height.

The component utilizes SMD/SMT termination and comes packaged on a reel with a standard quantity of 900 units. It is RoHS3 compliant, has a Moisture Sensitivity Level (MSL) of 1, and is REACH unaffected.

S558-5999-J1 Quick Information

Product Type: Audio Transformer / Signal Transformer

Series: S558 - 5999

Canonical Name: Bel Fuse S558-5999-J1 Audio Transformer / Signal Transformer

Subcategory: Pulse Transformers

S558-5999-J1 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

S558-5999-J1 Features

350 µH inductance for 10/100Base-T applications.
2 Ohms maximum DC resistance on primary.
SMD/SMT package for automated assembly.
900 units per reel for volume production.
Compact dimensions: 12.32 x 7.24 x 5.71 mm.

S558-5999-J1 Applications

Used in 10/100Base-T Ethernet LAN interfaces.
Provides signal isolation in networking equipment.
Suitable for pulse transformer applications in transformers.
Used in surface-mount PCB designs.

S558-5999-J1 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the inductance of the S558-5999-J1?

350 µH.

What is the maximum DC resistance?

2 Ohms.

What is the mounting type of this transformer?

SMD/SMT.

What are the dimensions of the S558-5999-J1?

12.32 mm length, 7.24 mm width, and 5.71 mm height.

What is the standard package quantity?

900 pieces per reel.

What application is this transformer designed for?

10/100Base-T Ethernet.

What are the primary and secondary resistance values?

Primary resistance is 2 Ohms, secondary resistance is 1 Ohm.