component
SMAJ70CA-TR
Public Made by Adomby adom
STMicroelectronics TVS, SMA(DO-214AC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSMAJ70CA-TR
STMicroelectronics · TVS · SMA(DO-214AC)
SMAJ70CA-TR from STMicroelectronics, in a SMA(DO-214AC). 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 | Terminal 1 (bidirectional, no polarity) | passive | One of two identical bidirectional Transil terminals for the SMAJ70CA, which has no cathode band and clamps in both polarities at a 70 V stand-off voltage, with 77.8 V min and 81.9 V max breakdown at 1 mA. |
| 2 | Terminal 2 (bidirectional, no polarity) | passive | The second of two identical bidirectional Transil terminals for the SMAJ70CA, rated for 400 W peak pulse power (10/1000 µs) and an operating junction temperature up to 150 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SMA(DO-214AC) |
| 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 leakage current (25 °C) | IRM | 0.2 | µA | @VRM, 25 °C | 3 | ||
| Reverse leakage current (85 °C) | IRM | 1 | µA | @VRM, 85 °C | 3 | ||
| Breakdown voltage | VBR | 70 | 77.8 | 81.9 | V | @IR = 1 mA; pulse test tp < 50 ms | 3 |
| Clamping voltage (10/1000 µs) | VCL | 113 | V | @IPP = 3.5 A, 10/1000 µs | 3 | ||
| Dynamic resistance (10/1000 µs) | RD | 7.72 | Ω | 10/1000 µs | 3 | ||
| Clamping voltage (8/20 µs) | VCL | 146 | V | @IPP = 16 A, 8/20 µs | 3 | ||
| Dynamic resistance (8/20 µs) | RD | 3.75 | Ω | 8/20 µs | 3 | ||
| Voltage temperature coefficient | αT | 10.5 | 10-4/° C | 3 | |||
| Peak pulse power dissipation | PPP | 400 | W | Tj initial = Tamb | 2 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | 2 | ||
| Operating junction temperature range | Tj | -55 | 150 | °C | 2 | ||
| Maximum lead temperature for soldering | TL | 260 | °C | during 10 s | 2 | ||
| Thermal resistance, junction to leads | Rth(j-l) | 30 | °C/W | 2 | |||
| Thermal resistance, junction to ambient | Rth(j-a) | 120 | °C/W | on printed circuit on recommended pad layout | 2 |
CAD (KiCad official)
- Symbol:
SMAJ70CA-TR - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
smaj70ca-tr-etched.step/smaj70ca-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj70ca-tr.step/smaj70ca-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (10 pp, sha256
4bb181453198810d, retrieved 2026-10-21, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).