SI7021-A20-GM

AHT20 is a digital humidity and temperature sensor from ASAIR (Aosong) in a DFN package, with I2C interface — for cost-driven consumer, HVAC and IoT designs. The price point is the selection point: factory-calibrated humidity sensing at a fraction of Swiss-sensor cost, which is why the AHT20 became the default in budget IoT products. Selection advice: for the lowest cost, this is the pick; for tighter accuracy and long-term stability specs, compare against the Sensirion SHT3x family. Confirm your RH accuracy needs and supply voltage against the datasheet. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

SHT30-DIS-B2.5KS is a digital humidity and temperature sensor from Sensirion in a DFN-8 package, with I2C interface on tape and reel — for cost-driven HVAC, appliances and environmental monitoring. The SHT30 is the selection point for budget humidity sensing: Sensirion calibration quality at the lowest price in the family, with I2C for easy host integration. Selection advice: the 2.5KS suffix denotes the accuracy grade and reel packing — match the full SHT30-DIS-B2.5KS code. For tighter accuracy, the SHT31 is the drop-in upgrade in the same footprint. Confirm your RH accuracy needs against the datasheet before choosing. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

SHT31-DIS-B2.5KS is a digital humidity and temperature sensor from Sensirion in a DFN-8 package, with factory-calibrated output — for HVAC, environmental monitoring and consumer appliances. The factory calibration is the selection point: ±2% RH accuracy out of the box with no production calibration step, which removes test time from your line. Selection advice: the 2.5KS suffix denotes the accuracy grade and tape-and-reel packing — match the full SHT31-DIS-B2.5KS code. For tighter accuracy, step up within the SHT3x family; for cost-driven designs, the SHT30 is the drop-in alternative. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

SHT40-AD1B-R2 is a high-accuracy digital humidity and temperature sensor from Sensirion in a DFN-4 package — the fourth-generation SHT sensor for HVAC, medical and high-reliability environmental monitoring. The smaller DFN-4 footprint with improved accuracy over the SHT3x is the selection point: the upgrade path for designs that need better RH accuracy in less board space. Selection advice: the AD1B-R2 suffix denotes the accuracy grade, I2C address option and reel packing — match the full SHT40-AD1B-R2 code. For cost-driven designs, the SHT30 remains the budget pick in a larger package. Parameters verified against the Sensirion official product page. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

HPP845E131R5 is a digital humidity and temperature sensor from TE Connectivity in a DFN-6 package — I2C interface, 0 to 100 %RH, -40 to +125 °C, the TE formal ordering code for the HTU21D(F) sensor family. The HTU21D heritage is the selection point: a proven sensor with years of field history, now under TE ordering codes. Selection advice: the HPP845E131R5 code is the exact TE orderable part — do not substitute the bare HTU21D family name on a purchase order, as packing and grade differ. Confirm your RH accuracy needs against the datasheet. Parameters verified against the TE official product page. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

SGP40-D-R4 is a digital VOC gas sensor from Sensirion in a DFN-6 package — for indoor air quality monitoring in HVAC, purifiers and smart buildings. The MOX-based VOC sensing with on-chip compensation is the selection point: it turns raw gas resistance into a calibrated air-quality signal without external processing. Selection advice: the D-R4 suffix denotes the DFN package on tape and reel — match the full SGP40-D-R4 code. Note this senses VOCs, not CO2 — for CO2 monitoring, pair it with or choose the SCD4x NDIR sensor instead. Confirm your air-quality metric needs against the datasheet. Parameters verified against the Sensirion official product page. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

ACS37002LMABTR-050B5 is an isolated Hall-effect current sensor from Allegro MicroSystems in a 16-pin SOIC package, with a 50 A measurement range on tape and reel — for high-current motor drives, solar inverters and industrial power. The 50 A range in a standard SOIC-16 is the selection point: high-current isolated sensing without a bulky module or external shunt. Selection advice: the 050B5 code denotes the 50 A bidirectional variant — the ACS37002 ships in multiple ranges that are not interchangeable, so match the full ACS37002LMABTR-050B5 code. Confirm your current range, bandwidth and isolation requirements against the datasheet. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

ACS712ELCTR-05B-T is an isolated Hall-effect current sensor from Allegro MicroSystems in an 8-pin SOIC package, with a 5 A measurement range — for motor control, power supplies and overcurrent protection. The integrated Hall sensor with 2.1 kV isolation is the selection point: current sensing with galvanic isolation and no shunt resistor, so no power dissipation or high-side measurement headaches. Selection advice: the 05B code denotes the ±5 A range — the ACS712 ships in 5/20/30 A variants with different sensitivities that are not interchangeable, so match the full ACS712ELCTR-05B-T code. Confirm your current range and bandwidth needs against the datasheet. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

ACS712ELCTR-20A-T is an Allegro MicroSystems fully integrated Hall-effect linear current sensor in 8-pin SOIC (0.154 in narrow), tape-and-reel packing (TR) — ±20 A sensing range, 100 mV/A output sensitivity, ratiometric voltage output centered at 2.5 V, 5 µs output rise time, 80 kHz typical bandwidth, 4.5–5.5 V single supply, ±1.5% total output error at 25 °C, 1.2 mΩ primary conductor resistance, 2.1 kV RMS isolation between pins 1–4 and 5–8, −40 to +85 °C. The integrated copper conduction path is the selection point: current flows through the package itself, so sensing adds only 1.2 mΩ of series resistance — no external high-power shunt resistor and no isolation optocoupler needed for 2.1 kV RMS separation in motor control, SMPS, load monitoring and overcurrent protection. Selection advice: this is the bidirectional 20 A member — the ±5 A and ±30 A siblings differ in sensitivity and bandwidth, and the 20 A choice trades resolution against range, so match the range to your actual fault-current envelope. Allegro notes the ACS712 is not intended for automotive applications. Evidence: Allegro ACS712 datasheet and distributor listings confirm ±20 A, 100 mV/A, 80 kHz, 2.1 kV RMS, 8-SOIC and tape-and-reel packing. Match the full ACS712ELCTR-20A-T code. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.

ACS712ELCTR-30A-T is an Allegro Hall-effect linear current sensor in 8-SOIC — ±30 A bidirectional sensing, 66 mV/A sensitivity, 5 µs output response time, 80 kHz bandwidth, ±1.5% accuracy, 2.1 kVRMS galvanic isolation between the current path and the output, 1.2 mΩ internal conductor, 5 V single supply, ratiometric analog voltage output, tape-and-reel packing (T), -40 to +85 °C. The zero-insertion-loss sensing is the selection point: no external shunt resistor and no power dissipated in the sense path — the current flows through a 1.2 mΩ copper path while the output voltage is proportional to AC or DC current. Selection advice: this is the ±30 A version — the ACS712 also comes in 5 A and 20 A versions with different sensitivity, so match the full ACS712ELCTR-30A-T code to your current range. The FILTER pin lets you set bandwidth with an external capacitor. Evidence: Allegro ACS712 datasheet and distributor listings confirm ±30 A, 66 mV/A, 5 µs, 8-SOIC and reel packing. Match the full ACS712ELCTR-30A-T code. State quantity, packing and date-code requirements in your RFQ; we reconfirm the offered lot before quotation and reply within 24 hours.