Protek Devices SRV05-4-A
Full Technical Specifications
14 Parameters| Parameter / Attribute | Specification / Value |
|---|---|
| Type | Steering (Rail to Rail) |
| Mounting | Surface Mount |
| Voltage - breakdown | 6V |
| Voltage - clamping (Max) @ ipp | 21V |
| Voltage - reverse standoff | 5V |
| Current - peak pulse (10/1000μs) | 12A (8/20µs) |
| Power - peak pulse | 250W |
| Power line protection | Yes |
| Capacitance @ frequency | 1.5pF @ 1MHz |
| Operating temperature | -55°C~125°C(TA) |
| Package | Tape & Reel (TR) |
| Applications | DVI, Ethernet, USB |
| Case | SOT-23-6 |
| Unidirectional channels | 4 |
Need Stock or a Drop-in Second-Source for SRV05-4-A?
Package: SOT-23-6 · Pin-compatible replacements with immediate Shenzhen spot stock
The USBLC6-2SC6 is STs rail-to-rail ESD protection for USB and differential lines - a SOT-23-6 part with a deliberately flow-through pinout so the data pair passes straight through the pads, protecting both lines and the VBUS rail in one footprint. It appears on nearly every board with a USB connector, and the market answers with a well-behaved family: the same six-pin flow-through layout shipped by Bourns, Semtech, Littelfuse and onsemi, plus a large second-source clone row from Chinese fabs. The trap is not the six-pin parts - it is the lookalike high-speed ESD diodes in smaller packages whose pin count does not match the socket.
Verified Pin-Compatible Replacements (4 verified alternatives)
The Automotive-Grade Sibling
Shenzhen Spot Stock (24-48h Dispatch)
The same protection design in the extended-grade orderable suffix: rated per the automotive-qualified datasheet, same SOT-23-6 flow-through pinout and working voltage class.
Working voltage in the 5V rail class with the familiar 17V-class clamping at surge; two unidirectional protected lines plus rail steering.
The Same Layout, Four Lines
Shenzhen Spot Stock (24-48h Dispatch)
The Bourns member of the flow-through SOT-23-6 protection family: the same steering-diode concept rated for four protected lines against two on the USBLC6-2SC6.
Working voltage class matched to 5V rails; check the clamping figures against the original where line capacitance is tuned.
The High-Speed Clamp Alternative
Shenzhen Spot Stock (24-48h Dispatch)
Semtech RClamp protection in the same six-pin flow-through body, engineered around low capacitance for the high-speed pair.
5V-class working voltage; confirm capacitance against the original design budget for the specific data rate in use.
Same Job, Wrong Pin Count - Listed to Be Avoided
Shenzhen Spot Stock (24-48h Dispatch)
A two-channel high-speed ESD diode pair (sub-1pF class) for differential lines - electrically excellent for the job, mechanically a three-pin part without the VBUS pin.
Works in the same 5V-rail class; the difference is the topology, not the voltage.
Buyer & Quality Checklist for Sourcing Alternatives
- The family standard is the six-pin flow-through layout: keep the data pair on the outer pins and ground/power in the middle, and the socket accepts the ST, Bourns, Semtech, Littelfuse and onsemi members without layout changes.
- Screen by capacitance before footprint: each member protects at a slightly different line capacitance - match the original datasheet figure or the high-speed eye budget changes with the protection part.
- Watch the protected-line count: the USBLC6-2SC6 protects two lines plus the rail; SRV05-4-class parts cover four. Confirm which pins are live in your circuit rather than trusting the family glance.
- Do not judge by size: three-pin high-speed ESD diodes (TPD2E009 class) look like a cleaner answer and do not fit or steer the same way.
- The steering-diode family carries surge ratings (17V-class clamping at 8/20us pulses) that the inline diode pairs do not match - in circuits specified against IEC 61000-4-2 levels, compare the actual test condition lines.
- In repair, the part is often killed by the event it absorbed: replace it and check the protected IC behind it before returning the board, or the second failure comes back immediately.
Frequently Asked Technical Questions
Q: What is the pin-compatible replacement for USBLC6-2SC6?
A: Any SOT-23-6 flow-through protection part of the same family: STs own automotive-grade suffix, Bourns CDSOT23-SRV05-4, Semtech RClamp0504S, Littelfuse SP0504-class and the onsemi CM1293A, plus documented second sources. Verify protected-line count and line capacitance per datasheet.
Q: Can I use TPD2E009 instead of USBLC6-2SC6?
A: Not as a substitution: TPD2E009 is a three-pin part without the VBUS steering pin and a different land pattern. It is a fine protection diode for a new layout, but it does not fit or behave the same in this socket.
Q: Why does the pinout matter so much on this part?
A: The flow-through layout is the design feature: the data pair enters and exits on opposite pads so the protected traces carry no stubs. Protection parts in this family are chosen for that geometry as much as for their clamping numbers.