SMD code H3s
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.
The last letter, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and H3 was searched.
202 parts are printed H3s
Not sure which one you have?
Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.
2SK3078SISOT-893 pins, YFWNot recordedSOT-893 pinsYFW
- What it is
- Not recorded
- Maker
- YFW
- Package
- SOT-89
- Pins
- 3
- Details
- Semiconductor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
ACZRV5243B-HFSOD-323Zener diode, 2 pins, ComchipZener diodeSOD-3232 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOD-323
- Pins
- 2
- Details
- 13 V 0.2 mW zener diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
ACZRW5243B-HFSOD-123Zener diode, 2 pins, ComchipZener diodeSOD-1232 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOD-123
- Pins
- 2
- Details
- 13 V 0.35 mW zener diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
AMMSZ5243A-HFSOD-123Zener diode, 2 pins, ComchipZener diodeSOD-1232 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOD-123
- Pins
- 2
- Details
- 13 V 0.5 mW zener diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
AMMSZ5243AS-HFSOD-323Zener diode, 2 pins, ComchipZener diodeSOD-3232 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOD-323
- Pins
- 2
- Details
- 13 V 200 mW zener diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
AMMSZ5243B-HFSOD-123Zener diode, 2 pins, ComchipZener diodeSOD-1232 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOD-123
- Pins
- 2
- Details
- 13 V 0.5 mW zener diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
AUMH3N-HFSOT-363Dual NPN transistor, 6 pins, ComchipDual NPN transistorSOT-3636 pinsComchip
- What it is
- Dual NPN transistor
- Maker
- Comchip
- Package
- SOT-363
- Pins
- 6
- Details
- NPN+NPN digital transistor, R1 4.7 kΩ
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: NPN transistor pair.
BAV21WSOD-123FSwitching diode, 2 pins, Taiwan SemiconductorSwitching diodeSOD-123F2 pinsTaiwan Semiconductor
- What it is
- Switching diode
- Maker
- Taiwan Semiconductor
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
BAV21W-FLSOD-123FSwitching diode, 2 pins, Formosa MicrosemiSwitching diodeSOD-123F2 pinsFormosa Microsemi
- What it is
- Switching diode
- Maker
- Formosa Microsemi
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
BCW89SOT-23PNP transistor, 3 pins, Taitron ComponentsPNP transistorSOT-233 pinsTaitron Components
- What it is
- PNP transistor
- Maker
- Taitron Components
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor, 65 V, 0.1 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BZD27C220PSOD-123FZener diode, 2 pins, Taiwan SemiconductorZener diodeSOD-123F2 pinsTaiwan Semiconductor
- What it is
- Zener diode
- Maker
- Taiwan Semiconductor
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
BZT52B75SSOD-323Zener diode, 2 pins, YFWZener diodeSOD-3232 pinsYFW
- What it is
- Zener diode
- Maker
- YFW
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
BZX384C6V8SOD-323Zener diode, 2 pins, VishayZener diodeSOD-3232 pinsVishay
- What it is
- Zener diode
- Maker
- Vishay
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
BZX585-C7V5SOD-523Zener diode, 2 pins, NexperiaZener diodeSOD-5232 pinsNexperia
- What it is
- Zener diode
- Maker
- Nexperia
- Package
- SOD-523
- Pins
- 2
- Pinout
- 1 cathode
- 2 anode
- Details
- 7.5 V approx. ±5% voltage regulator (Zener) diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
1 more part has no package on record
BGH92MRF amplifier (MMIC), InfineonRF amplifier (MMIC)Not recordedNot recordedInfineon
- What it is
- RF amplifier (MMIC)
- Maker
- Infineon
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: RF amplifier.
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.
This part
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
- Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
- Open between every pair of pins: failed open, or a part that reads open when working.
- 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.
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.
NPN transistor pair
Diode range, part lifted. Test each transistor on its own pins, as the datasheet's pinout gives them.
Working, it reads
Red probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Silicon diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.
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: failed open.
- A reading the wrong way round as well: 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 three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
PNP transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Black probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
RF amplifier
Voltage, board powered, on the output pin that the bias resistor or choke feeds.
Working, it reads
The output pin sits at the device voltage the datasheet gives, a few volts, below the supply.
Dead, it reads
- Output pin at 0 V, or near 0 Ω to ground with the power off: shorted inside.
- Output pin at the full supply voltage: open inside, no current flowing.
- On the board:
- Measured on the board with power on; the bias network is part of the reading.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The figures depend on the part and its bias resistor. The datasheet gives both.
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 H3s
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 H3s
For a marking with its end worn or burnt off. Each code has a page of its own.
- H30S2
- H36S1
- H30B6
- H31B6
- H32B6
- H33B6
- H34B5
- H35B5
- H36B5
- H37B5
- H38B5
- H39B5
- H32541
- H3B7
- H3G2
- H3L6
- H3052
- H3103
- H3111
- H3131
- H3141
- H3351
- H3Z4
- H3V1
- H3U1
Codes not listed here are printed on 270 more parts.
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