component
ASMBJ40CA
Public Made by Adomby adom
PTTC(Polytronics Tech) ESD And Surge Protection (TVS/ESD), SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ASMBJ40CA
PTTC(Polytronics Tech) · ESD And Surge Protection (TVS/ESD) · SMB
ASMBJ40CA from PTTC(Polytronics Tech), in a SMB. 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 | A1 | passive | Bi-directional terminal 1 (no cathode band on bidirectional parts); reverse stand-off voltage VR 40.0 V, breakdown 44.4-49.1 V at 1 mA, max clamping 64.5 V at 9.3 A. |
| 2 | A2 | passive | Bi-directional terminal 2, interchangeable with terminal 1 (polarity band denotes cathode except bidirectional); 600 W peak pulse power on 10/1000µs waveform. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | PTTC(Polytronics Tech) |
| Package | SMB |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VR | 40 | V | 2 | |||
| Breakdown Voltage | VBR | 44.4 | 49.1 | V | @ IT = 1 mA | 2 | |
| Test Current | IT | 1 | mA | 2 | |||
| Maximum Clamping Voltage | VC | 64.5 | V | @ IPP = 9.3 A | 2 | ||
| Maximum Peak Pulse Current | IPP | 9.3 | A | 2 | |||
| Maximum Reverse Leakage | IR | 1 | A | @ VR | 2 | ||
| Peak Pulse Power Dissipation | PPPM | 600 | Watt | 10/1000s waveform (Note 1, Fig.1) | 1 | ||
| Steady State Power Dissipation | PM(AV) | 5 | Watt | TL = 75°C, Lead lengths 0.375” (9.5mm) (Fig.5) | 1 | ||
| Peak Forward Surge Current | IFSM | 100 | Amp | 8.3 ms single half sine wave superimposed on rated load (Note 2, Fig.6) | 1 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | 150 | °C | 1 | ||
| VBR Voltage tolerance | -5 | 5 | % | Suffix A | 1 | ||
| Soldering temperature | 260 | °C | Reflow peak temperature; time within 5°C of peak 40 seconds max | 5 |
CAD (KiCad official)
- Symbol:
ASMBJ40CA - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
asmbj40ca-etched.step/asmbj40ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);asmbj40ca.step/asmbj40ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: PTTC(Polytronics Tech) datasheet (6 pp, sha256
b85798a40e48d412, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).
# ASMBJ40CA
**PTTC(Polytronics Tech)** · ESD And Surge Protection (TVS/ESD) · SMB
ASMBJ40CA from PTTC(Polytronics Tech), in a SMB. 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 | A1 | passive | Bi-directional terminal 1 (no cathode band on bidirectional parts); reverse stand-off voltage VR 40.0 V, breakdown 44.4-49.1 V at 1 mA, max clamping 64.5 V at 9.3 A. |
| 2 | A2 | passive | Bi-directional terminal 2, interchangeable with terminal 1 (polarity band denotes cathode except bidirectional); 600 W peak pulse power on 10/1000µs waveform. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | PTTC(Polytronics Tech) |
| Package | SMB |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VR | | 40 | | V | | 2 |
| Breakdown Voltage | VBR | 44.4 | | 49.1 | V | @ IT = 1 mA | 2 |
| Test Current | IT | | 1 | | mA | | 2 |
| Maximum Clamping Voltage | VC | | | 64.5 | V | @ IPP = 9.3 A | 2 |
| Maximum Peak Pulse Current | IPP | | | 9.3 | A | | 2 |
| Maximum Reverse Leakage | IR | | | 1 | A | @ VR | 2 |
| Peak Pulse Power Dissipation | PPPM | 600 | | | Watt | 10/1000s waveform (Note 1, Fig.1) | 1 |
| Steady State Power Dissipation | PM(AV) | | | 5 | Watt | TL = 75°C, Lead lengths 0.375” (9.5mm) (Fig.5) | 1 |
| Peak Forward Surge Current | IFSM | | | 100 | Amp | 8.3 ms single half sine wave superimposed on rated load (Note 2, Fig.6) | 1 |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | | 150 | °C | | 1 |
| VBR Voltage tolerance | | -5 | | 5 | % | Suffix A | 1 |
| Soldering temperature | | | | 260 | °C | Reflow peak temperature; time within 5°C of peak 40 seconds max | 5 |
## CAD (KiCad official)
- Symbol: `ASMBJ40CA`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `asmbj40ca-etched.step` / `asmbj40ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `asmbj40ca.step` / `asmbj40ca.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [PTTC(Polytronics Tech) datasheet](docs/asmbj40ca-datasheet.pdf) (6 pp, sha256 `b85798a40e48d412`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/asmbj40ca-datasheet.pdf)