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SEP0640Q38CB Littelfuse SEP0640Q38CB SIDACTOR protection thyristor rated for 64V breakover voltage and 2.2A on-state current, in an 8-LQFN surface mount package. Designed for Ethernet and PoE applications.
Mfr Part #:

SEP0640Q38CB

Available from 3 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse SEP0640Q38CB SIDACTOR protection thyristor rated for 64V breakover voltage and 2.2A on-state current, in an 8-LQFN surface mount package. Designed for Ethernet and PoE applications.
✓ Total Stock: 9,661 pcs
$ Price Range: $1.42 - $3.94

SEP0640Q38CB Available from 3 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
5,107 pcs
On Request
5107 pcs On Request 1 On Request On Request 13+ On Request On Request
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
3,600 pcs
On Request
3600 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
954 pcs
On Request
954 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

SEP0640Q38CB Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Halogen Free
Industrial Grade
Mounting Type
Number of Circuits
SVHC Present
Storage Temperature
Supplier Device Package
Tape & Reel
Technology
Termination Style
Voltage
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SEP0640Q38CB Description

Short technical summary and product information.

The Littelfuse SEP0640Q38CB is a SIDACTOR protection thyristor from the SEPxxxxQ38 series, designed for overvoltage protection in Ethernet and Power over Ethernet (PoE) applications. It features a breakover voltage range of 58 V to 77 V (nominal 64 V) and a maximum on-state current of 2.2 A at 8 V. The device offers a holding current of 150 mA minimum and a switching current of 800 mA maximum.

 

This component is housed in an 8-LQFN package (5x6 mm) with surface mount termination, compatible with SO-8 footprints. It provides balanced overvoltage protection with low distortion and low insertion loss, making it suitable for high-speed data lines. The part is RoHS compliant, halogen-free, and Pb-free (E3 rating).

 

With a maximum non-repetitive on-state current rating of 6.5 A for 0.5 seconds, the SEP0640Q38CB can handle transient surge events. It is qualified to global standards including TIA-968, ITU K.20/21, and IEC 61000-4-5, and is suitable for GR1089 inter-building and intra-building protection requirements.

SEP0640Q38CB Quick Information

Product Type: SIDACTOR Protection Thyristor
Series: SEP0640Q38CB
Canonical Name: Littelfuse SEP0640Q38CB SIDACTOR Protection Thyristor, 64V, 2.2A, 8-LQFN
Subcategory: Ethernet/PoE Protection Thyristor

SEP0640Q38CB Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 85
REACH Status: REACH Unaffected
Lead Free: Yes

SEP0640Q38CB Estimated Pricing

Qty Low High
1+ $3.94 $3.94
10+ $2.55 $2.55
100+ $1.81 $1.81
500+ $1.52 $1.52
2,000+ $1.42 $1.42
4,000+ $1.42 $1.42

Estimated market price range - modelled values for guidance only, not live distributor offers.

SEP0640Q38CB Features

  • Breakover voltage range 58 V to 77 V.
  • Maximum on-state current 2.2 A.
  • Surface mount 8-LQFN package.
  • RoHS compliant and halogen-free.
  • Designed for Ethernet/PoE protection.

SEP0640Q38CB Applications

  • Overvoltage protection for Ethernet lines.
  • Power over Ethernet (PoE) protection.
  • 10/100/1000Base-T interface protection.
  • Telecom and networking equipment.

SEP0640Q38CB FAQs

5 frequently asked questions generated from this part’s specifications.
What is the breakover voltage of the SEP0640Q38CB?

The breakover voltage (VDRM) is 58 V minimum and 77 V maximum at IDRM=5 µA.

What is the maximum on-state current?

The maximum on-state current (IT) is 2.2 A at VT=8 V.

What package does the SEP0640Q38CB come in?

It is available in an 8-LQFN surface mount package, with a supplier device package of 8-QFN (5x6 mm).

Is the SEP0640Q38CB RoHS compliant?

Yes, the datasheet confirms RoHS compliance and Pb-free E3 rating. It is also halogen-free.

What are the typical applications for this device?

It is designed for Ethernet and Power over Ethernet (PoE) overvoltage protection, including 10BaseT, 100BaseT, and 1000BaseT.

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