SMD code HFV
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.
14 parts are printed HFV
Not sure which one you have?
Answer up to 4 quick questions and these 14 parts are ranked, with a meter test that settles it. It works on a dead part too.
3.0SMCJ45ASMCFTVS diode, 2 pins, Taitron ComponentsTVS diodeSMCF2 pinsTaitron Components
- What it is
- TVS diode
- Maker
- Taitron Components
- Package
- SMCF
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
4.0SMDJ45ASMCTVS diode, 2 pins, YFWTVS diodeSMC2 pinsYFW
- 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.
BZX84B3V6SOT-23Zener diode, 3 pins, Blue RocketZener diodeSOT-233 pinsBlue Rocket
- What it is
- Zener diode
- Maker
- Blue Rocket
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
SMDJ45ASMCTVS diode, 2 pins, JieJieTVS diodeSMC2 pinsJieJie
- What it is
- TVS diode
- Maker
- JieJie
- Package
- SMC
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
3.0GSMDJ45ASMCTVS diode, 2 pins, Good-ArkTVS diodeSMC2 pinsGood-Ark
- What it is
- TVS diode
- Maker
- Good-Ark
- Package
- SMC
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=45V, Vbr=50.0..57.5V, Ipp=41.3A, 3000W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
3.0SMI45ASMCTVS diode, 2 pins, SMC Diode SolutionsTVS diodeSMC2 pinsSMC Diode Solutions
- What it is
- TVS diode
- Maker
- SMC Diode Solutions
- Package
- SMC
- Pins
- 2
- Details
- Transient voltage supressor: Vbr=50.0..57.5V, Vrwm=45V, 41.2A, 3000W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
CD214L-T45ALFSMCTVS diode, 2 pins, BournsTVS diodeSMC2 pinsBourns
- What it is
- TVS diode
- Maker
- Bourns
- Package
- SMC
- Pins
- 2
- Details
- Transient voltage supressor: Vbr=50.0..55.30V, Vrwm=45V, Irsm=41.2A, 3000W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
IXD5123E626MR-GSOT-23-5Voltage supervisor, 5 pins, IXYSVoltage supervisorSOT-23-55 pinsIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 2.6V±2%, -Reset ODO, -WDEN, Wt=1.6s, Rdt=200ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
SMLJ45ASMCTVS diode, 2 pins, BournsTVS diodeSMC2 pinsBourns
- What it is
- TVS diode
- Maker
- Bourns
- Package
- SMC
- Pins
- 2
- Details
- TVS: 45V, 41.2A, 3000W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TV30C450JSMC2 pins, ComchipNot recordedSMC2 pinsComchip
- What it is
- Not recorded
- Maker
- Comchip
- Package
- SMC
- Pins
- 2
- Details
- TVS: 45V, 5%, 41.2A, 3000W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TV30C450J-GSMCTVS diode, 2 pins, ComchipTVS diodeSMC2 pinsComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMC
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=45.0V, Vbr=50.0..55.30V, Ipp=41.27A, 3000W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
XC6123E626MR-GSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
- What it is
- Voltage supervisor
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 2.6V±2%, -Reset ODO, -WDEN, Wt=1.6s, Rdt=200ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
2 more parts have no package on record
IXD5127N26G7RVoltage supervisor, IXYSVoltage supervisorNot recordedNot recordedIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.6V±0.8%, +Reset ODO, -MR, Rdt=100ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6127N26G7RVoltage supervisor, TorexVoltage supervisorNot recordedNot recordedTorex
- What it is
- Voltage supervisor
- Maker
- Torex
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.6V±0.8%, +Reset ODO, -MR, Rdt=100ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
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.
Zener diode
Diode range for the forward check, part lifted, red probe on the anode. A bench supply for the Zener voltage.
Working, it reads
About 0.6 to 0.8 V forward and open in reverse on the diode range. Its Zener voltage shows only on a supply: feed it through a resistor that sets about 5 mA, cathode to positive, read quickly, and it should hold near its rated voltage.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- Open both ways, forward too: failed open.
- Holds well off its rated voltage on the supply test: drifted.
- A soft knee, or a voltage that creeps on the supply test: leaky.
- On the board
- this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- A meter's diode range stops at about 2 to 3 V, so almost every Zener reads open in reverse on it, good or bad; a 3 V meter may just show a 2.4 or 2.7 V part. Above about 3 V the meter cannot tell a Zener from a plain diode.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Integrated circuit
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
- A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
- Supply present, output stuck: failed, or its load has.
- On the board:
- A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
- Compare:
- The surest reference is the same IC on a working board, measured pin by pin.
- Watch for:
- Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
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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