12 Amp ST ACST1220H-8H AC Switch Designed for Solid State Relays and Industrial Heating Applications
Key Attributes
Model Number:
ACST1220H-8H
Product Custom Attributes
Mfr. Part #:
ACST1220H-8H
Package:
IPAK
Product Description
Product Description
The ACST1220H-8H is a high-performance 12 A AC switch with self-overvoltage protection, designed for home appliances and industrial systems. It features a Triac structure with a high-voltage clamping device to absorb inductive turn-off energy and withstand line transients. Its Snubberless technology provides high static immunity (1000 V/s) and strong dynamic commutation (9 A/ms), easing PCB compliance with EMI standards. The device offers low gate current triggering (20 mA) and is suitable for inrush current limiting, heating resistor control, solid-state relays, and capacitor discharge circuits.
Product Attributes
- Brand: STMicroelectronics
- Package: IPAK
- Environmental Compliance: Halogen-free molding, lead-free plating, ECOPACK2, RoHS (2011/65/EU) compliant
- Flammability: IPAK Package meets UL-94, V0 flammability standard
Technical Specifications
| Parameter | Symbol | Test Conditions | Value | Unit |
| RMS on-state current | IT(RMS) | TC = 133 C | 12 | A |
| Repetitive peak off-state voltage | VDRM / VRRM | Tj = 150 C | 800 | V |
| Gate trigger current | IGT | VD = 12 V, RL = 33 , Quadrant I-II-III | Max. 20 | mA |
| Junction temperature max. | Tj max. | 150 | C | |
| High static immunity | dV/dt | Gate open, Tj = 150 C | Min. 1000 | V/s |
| Strong dynamic commutation | (dI/dt)c | Without snubber, Tj = 150 C | Min. 9 | A/ms |
| Non repetitive surge peak on-state current | ITSM | tp = 16.7 ms, Tj initial = 25 C | 110 | A |
| I2t value for fusing | I2t | tp = 10 ms, Tj = 25 C | 66 | As |
| On-state voltage | VTM | ITM = 17 A, tP = 380 s, Tj = 25 C | Max. 1.55 | V |
| Leakage current | IDRM/IRRM | VD = VDRM , VR = VRRM, Tj = 150 C | 4.5 | mA |
| Junction to case thermal resistance | Rth(j-c) | (AC) | Max. 1.2 | C/W |
2411110948_ST-ACST1220H-8H_C26824450.pdf
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