Can you guarantee authenticity for obsolete parts?

In the obsolete market, absolute guarantees are not realistic due to fragmented supply chains. Instead, we control risk through supplier selection, inspection, and risk-based testing aligned with industry standards.

What if parts fail after delivery?

All parts are covered by a 45-day functional warranty from the date of receipt. Claims must be supported by an accredited third-party test report.

Can I request specific tests before shipment?

Yes. You can request tests such as X-ray, decapsulation, electrical testing, or others based on your requirements. These are arranged through certified labs at additional cost.

Do you provide inspection or test reports?

Yes. Inspection images and test reports (if testing is conducted) can be shared prior to shipment upon request.

What happens if I reject it after inspection?

If rejection is based on valid findings from an agreed inspection or test, we will review and support resolution. Orders are otherwise non-cancellable once procurement is completed.

Do you require advance payment?

Yes. Orders are processed on advance payment due to the nature of sourcing obsolete components.

Who handles shipping and logistics?

Shipping is typically done on the customer’s DHL, FedEx, or UPS account. If needed, we can arrange shipment on your behalf.

Is escrow or milestone-based payment available?

Yes. Orders are executed through an escrow-based structure. Funds are released to the supplier only after delivery and buyer approval, ensuring control over both quality and transaction risk.

PARAMETER	VALUE
Manufacturer	Bel Fuse Inc.
Series	5ST
Package	Bulk
Mounting Type	Requires Holder
Fuse Type	Cartridge, Glass
Current Rating (Amps)	125 mA
Voltage Rating - AC	250 V
Response Time	Slow Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A
Melting I²t	0.05
Approval Agency	CCC, CE, CSA, cURus, IMQ, SEMKO, VDE
Operating Temperature	-55°C ~ 125°C
Size / Dimension	0.201" Dia x 0.787" L (5.10mm x 20.00mm)

Part Number / Manufacturer	Description / Specs	MOQ
S559-6204-22-F Manufacturer: Bel Fuse Inc. Category: Pulse Transformers	PULSE XFMR	1
S553-6500-C8-F Manufacturer: Bel Fuse Inc. Category: Pulse Transformers	PULSE XFMR 1:2TX/1:1RX 1.5/1.8MH	1
S558-5999-DL Manufacturer: Bel Fuse Inc. Category: Pulse Transformers	MODULE TRANSFORMER	1
S555-5999-15-F Manufacturer: Bel Fuse Inc. Category: Common Mode Chokes	CMC SMD	1
S555-5999-02-F Manufacturer: Bel Fuse Inc. Category: Common Mode Chokes	CMC SMD	1

Part Number / Manufacturer	Description / Specs	MOQ
S559-6204-22-F Manufacturer: Bel Fuse Inc. Category: Pulse Transformers	PULSE XFMR	1
S553-6500-C8-F Manufacturer: Bel Fuse Inc. Category: Pulse Transformers	PULSE XFMR 1:2TX/1:1RX 1.5/1.8MH	1
S558-5999-DL Manufacturer: Bel Fuse Inc. Category: Pulse Transformers	MODULE TRANSFORMER	1
S555-5999-15-F Manufacturer: Bel Fuse Inc. Category: Common Mode Chokes	CMC SMD	1
S555-5999-02-F Manufacturer: Bel Fuse Inc. Category: Common Mode Chokes	CMC SMD	1

5ST 125-R | BEL FUSE INC.

5ST 125-R | BEL FUSE INC.

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