BTS621L1E3128AAUMA1 - 8.5A Smart High-Side Switch 24V | Infineon
MPN: BTS621L1E3128AAUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.62 | $2,620.00 |
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View Datasheet →BTS621L1E3128AAUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Smart High-Side Power Switch (PROFET) |
| Number of Channels | 2 |
| Rds(on) per Channel (typ) | 8 mΩ |
| Continuous Load Current per Channel | 8.5 A |
| Operating Voltage Range | 5 V to 34 V |
| Load Dump Protection | Up to 42 V |
| Input Logic Level | CMOS-compatible, ground-referenced |
| Diagnostic Feedback | Current-mirror IS pin (proportional load current sense) |
| On-State Resistance | 8 mΩ typical |
| Package | PG-TO263-7-2 (DPAK-style, 7 leads + tab) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +150 C (junction) |
| Technology | Smart SIPMOS (vertical N-channel FET + charge pump + logic) |
| Protection Features | Overload, short-circuit, over-temperature, over-voltage, reverse battery |
| Automotive Qualification | AEC-Q100 (PROFET family) |
| Target Voltage Class | 24 V commercial vehicle systems (trucks, tractors, 24V industrial) |
| Lead-Free / RoHS | Yes (compliant) |
BTS621L1E3128AAUMA1 Pin Configuration
| Pin 1 | OUT1 — Output channel 1 (load connection) |
| Pin 2 | IN — Logic input (CMOS-compatible, ground-referenced) |
| Pin 3 | GND — Ground reference |
| Pin 4 | IS — Current sense / diagnostic feedback output |
| Pin 5 | OUT2 — Output channel 2 (load connection) |
| Pin 6 | VBB — Battery supply voltage |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin TAB | VBB — Tab/thermal pad - internally connected to VBB |
Safe Operating Area (typical, single pulse)
Typical Applications
BTS621L1E3128AAUMA1 is suitable for 6 applications: Commercial Truck Lighting Control, Agricultural Tractor Solenoid and Valve Drivers, Construction Equipment Heater Control, Industrial 24 V DC Distributed Systems, Body Electronics Module Loads, 24 V LED Work Light Modules.
Commercial Truck Lighting Control
The BTS621L1E3128AAUMA1 directly drives 24 V truck headlamps, marker lamps, and work lights with 8.5 A per-channel capacity. Its 34 V operating range and 42 V load-dump survival handle the harsh 24 V truck electrical environment. The integrated diagnostic IS pin enables broken-lamp detection for ASIL-relevant safety functions without shunt resistors.
Recommended
Agricultural Tractor Solenoid and Valve Drivers
24 V solenoid valves, hydraulic control valves, and PTO engagement coils in tractors draw heavy inrush currents that the BTS621L1E3128AAUMA1's 8.5 A continuous rating handles reliably. Built-in short-circuit and over-temperature protection prevents field failures from inductive kickback and wiring faults. AEC-Q100 qualification supports the agricultural machinery EMC and environmental requirements.
Recommended
Construction Equipment Heater Control
Cab heaters, mirror heaters, and seat heaters in 24 V construction equipment benefit from the BTS621L1E3128AAUMA1's 8.5 A capability and ground-referenced CMOS input. The dual-channel configuration enables two independent heater zones with one IC, reducing PCB area. Reverse-battery protection prevents ECU damage from jumper-cable miswiring in service trucks.
Recommended
Industrial 24 V DC Distributed Systems
Factory automation 24 V DC outputs drive sensors, indicators, and small actuators through the BTS621L1E3128AAUMA1. The IS pin current-mirror output feeds a microcontroller ADC for load monitoring and predictive maintenance. Wide 5 V to 34 V tolerance tolerates industrial DC bus variations during motor start-up events.
Recommended
Body Electronics Module Loads
Body control modules for trucks and tractors use the BTS621L1E3128AAUMA1 for central door locking, mirror adjustment motors, and interior lighting. AEC-Q100 grade and Smart SIPMOS reliability reduce warranty claims. The CMOS-compatible input drives directly from 3.3 V or 5 V microcontroller GPIO without level shifters.
Recommended
24 V LED Work Light Modules
High-power LED work lights for off-highway machinery need constant-current drivers with PWM dimming support. The BTS621L1E3128AAUMA1's IS feedback and ground-referenced input enable closed-loop current control with a simple op-amp. 8.5 A continuous rating handles 100 W+ LED arrays at 24 V nominal supply.
Recommended
Recommended Products Summary
Engineering reference data for BTS621L1E3128AAUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS621L1E3128ABUMA1 | ITS4200SSJDXUMA1 | BTS70202EPAXUMA1 | BTS5215LAUMA1 | BTS723GWXUMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-TO263-7-2 | PG-TO263-7-2 - same | PG-TO263-7-2 - same | PG-TO263-7-2 - same | PG-TO263-7-2 - same | PG-TO263-7-2 - same |
| Rds(on) per Channel | 8 mΩ | 8 mΩ | 200 mΩ (single ch) | 70 mΩ | 250 mΩ | 110 mΩ |
| Continuous Current per Channel | 8.5 A | 8.5 A | 1.0 A | 2.5 A | 1.5 A | 1.4 A |
| Operating Voltage Range | 5 V to 34 V | 5 V to 34 V | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V |
| Number of Channels | 2 | 2 | 1 | 2 | 2 | 2 |
| Diagnostic Feedback | Yes (IS pin current mirror) | Yes | Yes | Yes (SPI) | Yes | Yes |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes | Yes |
| Voltage Class | 24 V optimized | 24 V optimized | 12 V | 12 V | 12 V | 12 V |
Key Differentiators
- Higher continuous current per channel than 12 V PROFET competitors (vs BTS70202EPAXUMA1)
- Lower Rds(on) reduces conduction losses by 3x vs ITS4200 family (vs ITS4200SSJDXUMA1)
- 24 V native optimization vs 12 V retrofit (vs BTS5215LAUMA1)
Design Notes
Estimated: At 24 V supply, 8.5 A continuous per channel, and 8 mΩ Rds(on) per channel, each channel dissipates P = I² × R = 8.5² × 0.008 = 0.578 W. Both channels active total dissipation is ~1.16 W. On 6 cm² PCB copper, theta_JA of ~40 C/W gives 46 C rise above 25 C ambient, so junction reaches ~71 C - well within 150 C rating. On minimal copper (1 cm²), theta_JA can exceed 100 C/W, requiring derating to ~5 A per channel.
Follow Infineon's PG-TO263-7-2 reference layout with the tab soldered to a copper pour of at least 6 cm² on top and bottom layers for rated thermal performance. Use thermal vias (12+ 0.3 mm vias) under the tab to inner copper planes. Keep high-current OUT traces wide (>2 mm per ampere) and short to minimize voltage drop and EMI. The IS sense resistor should be Kelvin-connected to the GND pin to avoid ground bounce errors.
Do not connect the IS pin directly to a microcontroller ADC without a current-limiting resistor and protection Zener - fault conditions can drive IS above the MCU's absolute maximum. Reverse-battery protection is built in but does NOT protect against negative transients below -24 V; add an external TVS for severe load-dump reverse polarity events. The input pin is ground-referenced CMOS - do NOT drive it from a logic supply that can exceed 7 V absolute maximum.
Compliance Information
AEC-Q100 qualified per Infineon Classic PROFET 12V family datasheet. RoHS and REACH compliant per product page. Lead-free and halogen-free construction.
