SMD code PRH
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.
5 parts are printed PRH
Not sure which one you have?
Answer up to 4 quick questions and these 5 parts are ranked, with a meter test that settles it. It works on a dead part too.
PAM40SD150BLSOD-123FTVS diode, 2 pins, ProTek DevicesTVS diodeSOD-123F2 pinsProTek Devices
- What it is
- TVS diode
- Maker
- ProTek Devices
- Package
- SOD-123F
- Pins
- 2
- Details
- 200 Watt TVS Component
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PSMS05SOT-23-6ESD protection diode, 6 pins, ProTek DevicesESD protection diodeSOT-23-66 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOT-23-6
- Pins
- 6
- Details
- 350 Watt Multi-Line TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMF150A-AUSOD-123FTVS diode, 2 pins, JieJieTVS diodeSOD-123F2 pinsJieJie
- What it is
- TVS diode
- Maker
- JieJie
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMS05SOT-23-6ESD protection diode, 6 pins, ProTek DevicesESD protection diodeSOT-23-66 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOT-23-6
- Pins
- 6
- Details
- ESD protection diode, VRWM 5 V, Cj 200 pF
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMBJ170A-HSMBTVS diode, 2 pins, Yint ElectronicsTVS diodeSMB2 pinsYint Electronics
- What it is
- TVS diode
- Maker
- Yint Electronics
- Package
- SMB
- Pins
- 2
- Details
- Transient voltage supressor: Vbr=189..209V, Vrwm=170V, Ipp=2.2A, 600W(1ms)
- 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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