SMD code 51CA
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.
23 parts are printed 51CA
Not sure which one you have?
Answer up to 4 quick questions and these 23 parts are ranked, with a meter test that settles it. It works on a dead part too.
P4SMAJ51CASMA2 pins, Sunmate SemiconductorNot recordedSMA2 pinsSunmate Semiconductor
- What it is
- Not recorded
- Maker
- Sunmate Semiconductor
- Package
- SMA
- Pins
- 2
- Details
- TVS: 51V, 4.9A, 400W(1ms), Bidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P6SMB51CASMBTVS diode, 2 pins, EIC SemiconductorTVS diodeSMB2 pinsEIC Semiconductor
- What it is
- TVS diode
- Maker
- EIC Semiconductor
- Package
- SMB
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P6SMBJ51CASMBTVS diode, 2 pins, LittelfuseTVS diodeSMB2 pinsLittelfuse
- What it is
- TVS diode
- Maker
- Littelfuse
- Package
- SMB
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ51CASMATVS diode, 2 pins, SynSemiTVS diodeSMA2 pinsSynSemi
- What it is
- TVS diode
- Maker
- SynSemi
- Package
- SMA
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMBG51CASMBG2 pins, Microsemi Integrated Products DivisionNot recordedSMBG2 pinsMicrosemi Integrated Products Division
- What it is
- Not recorded
- Maker
- Microsemi Integrated Products Division
- Package
- SMBG
- Pins
- 2
- Details
- TVS: 51V, 7.3A, 600W(1ms), Bidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMCJ51CASMCTVS diode, 2 pins, SynSemiTVS diodeSMC2 pinsSynSemi
- What it is
- TVS diode
- Maker
- SynSemi
- Package
- SMC
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMF51CASOD-123FTVS diode, 2 pins, Micro Commercial ComponentsTVS diodeSOD-123F2 pinsMicro Commercial Components
- What it is
- TVS diode
- Maker
- Micro Commercial Components
- Package
- SOD-123F
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
1 more part has no package on record
UMA51CATVS diode, Microsemi Integrated Products DivisionTVS diodeNot recordedNot recordedMicrosemi Integrated Products Division
- What it is
- TVS diode
- Maker
- Microsemi Integrated Products Division
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=51V, Vbr=56.7..82.4V, 6.1A, 500W(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.
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