MMSZ56VBW

XCH(旭昌辉) · IC · SOD-123

MMSZ56VBW from XCH(旭昌辉), in a SOD-123. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	K	passive	Cathode, the end marked by the band on the package; the Zener voltage VZ is 54.88 V min to 57.12 V max (56 V nominal) at IZT = 2 mA.
2	A	passive	Anode, the end opposite the cathode band; forward voltage is 900 mV maximum at IF = 10 mA.

Key specifications

Parameter	Value
Manufacturer	XCH(旭昌辉)
Package	SOD-123
Category
Pins	2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Zener voltage (VZ) min	VZ	54.88			V	IZT = 2 mA; pulse 10 mS	2
Zener voltage (VZ) nominal	VZ		56		V	IZT = 2 mA; pulse 10 mS	2
Zener voltage (VZ) max	VZ			57.12	V	IZT = 2 mA; pulse 10 mS	2
Zener voltage tolerance (B series)		-2		2	%	B series; standard tolerance on nominal zener voltage	1
Zener impedance	ZZT			200	()	at IZT = 2 mA	2
Zener knee impedance	ZZK			400	()	at IZK = 0.5 mA	2
Reverse current	IR			0.045	A	VR = 39.2 V	2
Forward voltage	VF			900	mV	IF = 10 mA	2
Power dissipation	PD			500	mW	TA = 25°C unless otherwise noted	1
Storage temperature range	TSTG	-65		150	°C		1
Operating temperature range	TOPR	-65		150	°C		1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	 Matte Tin(Sn) Lead Finish  Band Indicates Cathode	1

CAD (KiCad official)

Symbol: MMSZ56VBW
Footprint: Diode_SMD:D_SOD-123F
3D model: SOD-123 (KiCad packages3D, STEP)
3D model files: mmsz56vbw-etched.step / mmsz56vbw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz56vbw.step / mmsz56vbw.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: XCH(旭昌辉) datasheet (4 pp, sha256 8c9e05687ff5d8ae, retrieved 2026-10-17, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

# MMSZ56VBW

**XCH(旭昌辉)** · IC · SOD-123

MMSZ56VBW from XCH(旭昌辉), in a SOD-123. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode, the end marked by the band on the package; the Zener voltage VZ is 54.88 V min to 57.12 V max (56 V nominal) at IZT = 2 mA. |
| 2 | A | passive | Anode, the end opposite the cathode band; forward voltage is 900 mV maximum at IF = 10 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| Package | SOD-123 |
| Category |  |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Zener voltage (VZ) min | VZ | 54.88 |  |  | V | IZT = 2 mA; pulse 10 mS | 2 |
| Zener voltage (VZ) nominal | VZ |  | 56 |  | V | IZT = 2 mA; pulse 10 mS | 2 |
| Zener voltage (VZ) max | VZ |  |  | 57.12 | V | IZT = 2 mA; pulse 10 mS | 2 |
| Zener voltage tolerance (B series) |  | -2 |  | 2 | % | B series; standard tolerance on nominal zener voltage | 1 |
| Zener impedance | ZZT |  |  | 200 | () | at IZT = 2 mA | 2 |
| Zener knee impedance | ZZK |  |  | 400 | () | at IZK = 0.5 mA | 2 |
| Reverse current | IR |  |  | 0.045 | A | VR = 39.2 V | 2 |
| Forward voltage | VF |  |  | 900 | mV | IF = 10 mA | 2 |
| Power dissipation | PD |  |  | 500 | mW | TA = 25°C unless otherwise noted | 1 |
| Storage temperature range | TSTG | -65 |  | 150 | °C |  | 1 |
| Operating temperature range | TOPR | -65 |  | 150 | °C |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin |  Matte Tin(Sn) Lead Finish  Band Indicates Cathode | 1 |

## CAD (KiCad official)

- Symbol: `MMSZ56VBW`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `mmsz56vbw-etched.step` / `mmsz56vbw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmsz56vbw.step` / `mmsz56vbw.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [XCH(旭昌辉) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603103928896933888) (4 pp, sha256 `8c9e05687ff5d8ae`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/mmsz56vbw-datasheet.pdf)