SMD code 550C
Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables and published code lists.
15 parts are printed 550C
Not sure which one you have?
Answer up to 4 quick questions and these 15 parts are ranked, with a meter test that settles it. It works on a dead part too.
TVS diode, 2 pins. What differs:
1.5SMC550CASMCDOWOSMCDOWO
- What it is
- TVS diode
- Maker
- DOWO
- Package
- SMC
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
1.5SMC550CA*SMCYFWSMCYFW
- What it is
- TVS diode
- Maker
- YFW
- Package
- SMC
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMA550CASMADOWOSMADOWO
- What it is
- TVS diode
- Maker
- DOWO
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
P6SMB550CASMBDOWOSMBDOWO
- What it is
- TVS diode
- Maker
- DOWO
- Package
- SMB
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
P6SMB550CA(MS)SMBMSKSEMISMBMSKSEMI
- What it is
- TVS diode
- Maker
- MSKSEMI
- Package
- SMB
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
P15SMCJ550CASMCFFormosa MicrosemiSMCFFormosa Microsemi
- What it is
- TVS diode
- Maker
- Formosa Microsemi
- Package
- SMCF
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PAM4SMA550CASMAProTek DevicesSMAProTek Devices
- What it is
- TVS diode
- Maker
- ProTek Devices
- Package
- SMA
- Pins
- 2
- Details
- 400 Watt TVS Component
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PAM30DOAA550CASMBProTek DevicesSMBProTek Devices
- What it is
- TVS diode
- Maker
- ProTek Devices
- Package
- SMB
- Pins
- 2
- Details
- 600 Watt TVS Component
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJP4KE550CASMAMicro Commercial ComponentsSMAMicro Commercial Components
- What it is
- TVS diode
- Maker
- Micro Commercial Components
- Package
- SMA
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=495.0V, Vbr=522.50..577.50V, Ipp=0.5A, 400W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMBJP6KE550CASMBMicro Commercial ComponentsSMBMicro Commercial Components
- What it is
- TVS diode
- Maker
- Micro Commercial Components
- Package
- SMB
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=495.0V, Vbr=522.50..577.50V, Ipp=0.8A, 600W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMCJ1.5KE550CASMCMicro Commercial ComponentsSMCMicro Commercial Components
- What it is
- TVS diode
- Maker
- Micro Commercial Components
- Package
- SMC
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=495.0V, Vbr=522.50..577.50V, Ipp=2.0A, 1500W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TPSMB550CA-ASMBLittelfuseSMBLittelfuse
- What it is
- TVS diode
- Maker
- Littelfuse
- Package
- SMB
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=468.0V, Vbr=522.5..577.5V, Ipp=0.8A, 600W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TV15CJ551CA-GSMCComchipSMCComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMC
- Pins
- 2
- Details
- Transient voltage supressor: Vbr=522.5..577.5V, Vrwm=470.3V, Ipp=1.98A, 1500W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TVP04A551CA-GSMAComchipSMAComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMA
- Pins
- 2
- Details
- Transient voltage supressor: Vbr=522.50..577.50V, Vrwm=470.3V, Ipp=0.53A, 400W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TVP06B551ACA-GSMBComchipSMBComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMB
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=470.3V, Vbr=522.50..577.50V, Ipp=0.79A, 600W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
Is it dead? One meter test per kind
Parts of the same kind are tested the same way, so each test is here once. Each part above points to its own.
TVS or ESD protection diode
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
- From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
- A reading both ways on a one-way part: leaky.
- A one-way part open both ways: failed open.
- On the board
- , a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
- Compare:
- The same part on the next line or connector pin is the healthy reading to compare with.
- Watch for:
- A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Printed with a code easy to misread as 550C
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes that begin with 550C
For a marking with its end worn or burnt off. Each code has a page of its own.
Did you find your part?
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