1SMA5935BT3G

onsemi · Zener Diodes · SMA

1SMA5935BT3G from onsemi, in a SMA. 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	CATHODE	passive	Cathode terminal, identified by the polarity band or molded notch on the package (Style 1 pin 1 is the cathode).
2	ANODE	passive	Anode terminal of the Zener diode (Style 1 pin 2 is the anode).

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SMA
Category	Diodes
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 / nominal / max)	VZ	25.65	27	28.35	Volts	@ IZT = 13.9 mA; TA = 25°C; VZ limits guaranteed at thermal equilibrium	2
Maximum Zener impedance @ IZT	ZZT			23	Ω	@ IZT = 13.9 mA	2
Maximum Zener impedance @ IZK	ZZK			700	Ω	@ IZK = 0.25 mA	2
Maximum DC Zener current	IZM			56	mA(dc)		2
Forward voltage	VF			1.2	V	@ IF = 200 mA, for all types	2
Zener voltage tolerance (type number ±5%)		-5		5	%	Tolerance designation for 1SMA59xxBT3G type number (Note 3)	2
DC power dissipation (TL = 75°C, zero lead length)	PD			1.5	W	TL = 75°C, measured zero lead length (Note 1)	1
DC power dissipation (TA = 25°C)	PD			0.5	W	TA = 25°C (Note 2)	1
Operating and storage temperature range	TJ, Tstg	-65		150	°C		1
Derating above 75°C (lead)	PD		20		mW/°C	Derate above TL = 75°C	1
Derating above 25°C (ambient)	PD		4		mW/°C	Derate above TA = 25°C	1
Thermal resistance, junction-to-lead	RJL		50		°C/W	Measured zero lead length, 1 in² copper pad, FR-4 (Note 1)	1
Thermal resistance, junction-to-ambient	RJA		250		°C/W	FR-4 board, onsemi minimum recommended footprint (Note 2)	1

CAD (KiCad official)

Symbol: 1SMA5935BT3G
Footprint: Diode_SMD:D_SMA
3D model: SMA (KiCad packages3D, STEP)
3D model files: 1sma5935bt3g-etched.step / 1sma5935bt3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1sma5935bt3g.step / 1sma5935bt3g.glb are the bare package body.

Provenance

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

Datasheet: onsemi datasheet (6 pp, sha256 f462474d29a69587, retrieved 2026-10-21, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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

# 1SMA5935BT3G

**onsemi** · Zener Diodes · SMA

1SMA5935BT3G from onsemi, in a SMA. 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 | CATHODE | passive | Cathode terminal, identified by the polarity band or molded notch on the package (Style 1 pin 1 is the cathode). |
| 2 | ANODE | passive | Anode terminal of the Zener diode (Style 1 pin 2 is the anode). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SMA |
| Category | Diodes |
| 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 / nominal / max) | VZ | 25.65 | 27 | 28.35 | Volts | @ IZT = 13.9 mA; TA = 25°C; VZ limits guaranteed at thermal equilibrium | 2 |
| Maximum Zener impedance @ IZT | ZZT |  |  | 23 | Ω | @ IZT = 13.9 mA | 2 |
| Maximum Zener impedance @ IZK | ZZK |  |  | 700 | Ω | @ IZK = 0.25 mA | 2 |
| Maximum DC Zener current | IZM |  |  | 56 | mA(dc) |  | 2 |
| Forward voltage | VF |  |  | 1.2 | V | @ IF = 200 mA, for all types | 2 |
| Zener voltage tolerance (type number ±5%) |  | -5 |  | 5 | % | Tolerance designation for 1SMA59xxBT3G type number (Note 3) | 2 |
| DC power dissipation (TL = 75°C, zero lead length) | PD |  |  | 1.5 | W | TL = 75°C, measured zero lead length (Note 1) | 1 |
| DC power dissipation (TA = 25°C) | PD |  |  | 0.5 | W | TA = 25°C (Note 2) | 1 |
| Operating and storage temperature range | TJ, Tstg | -65 |  | 150 | °C |  | 1 |
| Derating above 75°C (lead) | PD |  | 20 |  | mW/°C | Derate above TL = 75°C | 1 |
| Derating above 25°C (ambient) | PD |  | 4 |  | mW/°C | Derate above TA = 25°C | 1 |
| Thermal resistance, junction-to-lead | RJL |  | 50 |  | °C/W | Measured zero lead length, 1 in² copper pad, FR-4 (Note 1) | 1 |
| Thermal resistance, junction-to-ambient | RJA |  | 250 |  | °C/W | FR-4 board, onsemi minimum recommended footprint (Note 2) | 1 |

## CAD (KiCad official)

- Symbol: `1SMA5935BT3G`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `1sma5935bt3g-etched.step` / `1sma5935bt3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma5935bt3g.step` / `1sma5935bt3g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/1sma5935bt3-d.pdf) (6 pp, sha256 `f462474d29a69587`, retrieved 2026-10-21, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/1sma5935bt3g-datasheet.pdf)