

The new SEPxxxxQ38 series has a surge rating compatible with GR1089 Inter-building and ITU K.20/21 Enhanced protection requirements.
Targeted for high-speed applications such as 10BaseT, 100BaseT, and 1000BaseT, the SEP series maintains signal quality while providing robust protection for Ethernet and PoE applications.
This latest silicon design innovation results in a capacitive loading characteristic that is constant with respect to the voltage across the device. This reduces distortion caused by typical solid-state protection solutions.
Offered in a surface-mount, QFN package, the SEP provides small package size without sacrificing power and surge handling capabilities.
Applicable Global Standards:
TIA-968-A, TIA-968-B, ITU K.20/21 Enhanced Level, ITU K.20/21 Basic LeveL, IEC 61000-4-5 2nd edition, IEC 61000-4-5 2nd edition, GR 1089 Intra-building, YD/T 1082, YD/T 993, YD/T 950, Class 4/5 compliance of IEC 61000--4-5
- Compatible with 1000Base - T
- Balancedover-voltageprotection
- Low distortion
- Low insertion loss
- Low profile
- Small SO-8 footprint
- Fails short circuit when surged in excess of ratings
SEPxxxxQ38 Parts
Filters
Part Number | Actions | VDRM T-R (V) | VS T-R (V) | Pins Tip to Ring | CO 2V T-R MAX (pF) | Iscurr | IDRM @ VDRM (µA) | IH (A) | Ipp5x310 | Ipp2x10 | Ipp8x20 | Pins Tip to Ground | Pins Ring to Ground | Surge Rating |
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Part Number | Actions | VDRM T-R (V) | VS T-R (V) | Pins Tip to Ring | CO 2V T-R MAX (pF) | Iscurr | IDRM @ VDRM (µA) | IH (A) | Ipp5x310 | Ipp2x10 | Ipp8x20 | Pins Tip to Ground | Pins Ring to Ground | Surge Rating | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6 | 25 | 1 8-4 5 | 25 | 800 | 5 | 50 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C | |||
6 | 25 | 1 8-4 5 | 25 | 800 | 5 | 50 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C | |||
58 | 77 | 1 8-4 5 | 25 | 800 | 5 | 150 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C | |||
58 | 77 | 1 8-4 5 | 25 | 800 | 5 | 150 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C | |||
65 | 88 | 1 8-4 5 | 25 | 800 | 5 | 150 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C | |||
65 | 88 | 1 8-4 5 | 25 | 800 | 5 | 150 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C | |||
75 | 98 | 1 8-4 5 | 25 | 800 | 5 | 150 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C | |||
75 | 98 | 1 8-4 5 | 25 | 800 | 5 | 150 | 200 | 500 | 400 | 1 8-3 6 | 4 5-3 6 | C |
Series: SEPxxxxQ38 Resources


Circuit Protection Selection Guide
Consult this guide to learn about circuit protection considerations and the solutions Littelfuse offers. Tables help match products with applications.