# TISP4040L1AJR-S

**BOURNS** · Thyristor Surge Suppressors (TSS) · DO-214AC(SMA)

TISP4040L1AJR-S from BOURNS, in a DO-214AC(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 | R | passive | Terminal R (alternative line designator B) of the symmetrical bidirectional thyristor, with VDRM of ±25 V and V(BO) of ±40 V for the '4040; the device is symmetrical and terminal 1 is not marked on the part. |
| 2 | T | passive | Terminal T (alternative line designator A) of the symmetrical bidirectional thyristor, with VDRM of ±25 V and V(BO) of ±40 V for the '4040; the device is symmetrical so polarity does not matter. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | DO-214AC(SMA) |
| Category | TVS/Fuse/Board Level 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 |
|---|---|---|---|---|---|---|---|
| Repetitive peak off-state voltage | VDRM | -25 |  | 25 | V |  | 1 |
| Repetitive peak off-state current | IDRM | -5 |  | 5 | μA | VD = VDRM | 2 |
| Breakover voltage | V(BO) | -40 |  | 40 | V | di/dt = ±0.8 A/ms | 2 |
| Impulse breakover voltage | V(BO) | -63 |  | 63 | V | dv/dt = ±1000 V/μs, linear voltage ramp, maximum ramp value = ±500 V | 2 |
| Breakover current | I(BO) | -0.8 |  | 0.8 | A | di/dt = ±0.8 A/ms | 2 |
| Off-state current | ID | -2 |  | 2 | μA | VD = ±22 V | 2 |
| Holding current | IH | -50 |  | 50 | mA | IT = ±5 A, di/dt = +/-30 mA/ms | 2 |
| Off-state capacitance | Coff |  | 23 | 29 | pF | f = 1 MHz, Vd = 1 V rms, VD = 0 | 3 |
| Off-state capacitance | Coff |  | 20 | 26 | pF | f = 1 MHz, Vd = 1 V rms, VD = 1 V | 3 |
| Off-state capacitance | Coff |  | 18 | 24 | pF | f = 1 MHz, Vd = 1 V rms, VD = 2 V | 3 |
| Non-repetitive peak on-state pulse current | ITSP | -150 |  | 150 | A | 2/10 μs (Telcordia GR-1089-CORE) voltage wave shape | 2 |
| Non-repetitive peak on-state pulse current | ITSP | -120 |  | 120 | A | 8/20 μs (IEC 61000-4-5) combination wave generator | 1 |
| Non-repetitive peak on-state pulse current | ITSP | -65 |  | 65 | A | 10/160 μs (FCC Part 68) voltage wave shape | 2 |
| Non-repetitive peak on-state pulse current | ITSP | -45 |  | 45 | A | 10/700 μs (ITU-T K.20/45/21) voltage wave shape | 2 |
| Non-repetitive peak on-state pulse current | ITSP | -35 |  | 35 | A | 10/560 μs (FCC Part 68) voltage wave shape | 2 |
| Non-repetitive peak on-state pulse current | ITSP | -30 |  | 30 | A | 10/1000 μs (GR-1089-CORE) voltage wave shape | 2 |
| Initial rate of rise of current | di/dt |  |  | 130 | A/μs |  | 2 |
| Maximum junction temperature | TJM |  |  | 150 | °C |  | 2 |
| Storage temperature range | Tstg |  |  | 150 | °C |  | 2 |
| Junction to free air thermal resistance (SMA) | RθJA |  | 125 |  | °C/W | EIA/JESD51-3 PCB, IT = ITSM(1000), TA = 25 °C | 3 |
| Junction to free air thermal resistance (SMA) | RθJA |  | 60 |  | °C/W | 265 mm x 210 mm populated line card, 4-layer PCB, IT = ITSM(1000), TA = 25 °C | 3 |

## CAD (KiCad official)

- Symbol: `TISP4040L1AJR-S`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [BOURNS datasheet](docs/tisp4040l1ajr-s-datasheet.pdf) (12 pp, sha256 `894a404a590cdb89`, retrieved 2026-11-07, 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/tisp4040l1ajr-s-datasheet.pdf)