BSP125H6433XTMA1 - 600V N-Ch 120mA MOSFET | Infineon
MPN: BSP125H6433XTMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.65 | $16.50 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
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View Datasheet →BSP125H6433XTMA1 Maximum Ratings & Electrical Characteristics
| FET Type | N-Channel Enhancement Mode |
| Drain-Source Voltage (V(BR)DSS) | 600 V |
| Continuous Drain Current (ID) at TA | 120 mA |
| Power Dissipation (PD) at TA | 1.8 W |
| Package | PG-SOT223-4 (3+tab) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q101 |
| Lead Plating | Pb-free |
| RoHS Status | Compliant |
| Operating Temperature Range | -55C to +150C (TJ) |
| Configuration | Single N-Channel MOSFET |
BSP125H6433XTMA1 Pin Configuration
| Pin 1 | Gate — MOSFET gate control input |
| Pin 2 | Drain — MOSFET drain (internally bonded to tab) |
| Pin 3 | Source — MOSFET source |
| Pin 4 | Tab (Drain) — Exposed thermal tab - drain connection and heatsink |
Safe Operating Area (DC)
Typical Applications
BSP125H6433XTMA1 is suitable for 6 applications: Automotive Body Control High-Side Switch, Automotive Relay Replacement, Offline Auxiliary Power Supply Switch, Industrial Level Shifter, Battery Management Module Switch, LED Driver High-Side Switch.
Automotive Body Control High-Side Switch
The BSP125H6433XTMA1's 600V V(BR)DSS and 120 mA continuous drain current make it well-suited as a high-side switch in automotive body controllers that drive lamps, relays, and small solenoids from a 12V or 24V battery rail. Its AEC-Q101 qualification means it survives the automotive temperature-cycling and humidity-bias stress tests required for in-cabin modules. Placed between the battery feed and the load with a gate pull-down resistor of 10-100 kohm, the part provides a logic-controlled switch that is far smaller and more reliable than an electromechanical relay. Compared with a discrete BJT, the MOSFET offers lower on-resistance and zero gate-drive current in steady state.
Recommended
Automotive Relay Replacement
Mechanical automotive relays are bulky, slow, and prone to contact wear. The BSP125H6433XTMA1, with its 600V drain-source rating and 1.8W power dissipation in PG-SOT223-4, can replace a relay driving resistive or inductive loads up to 120 mA. A small gate series resistor (10-100 ohm) damps the ringing when switching inductive loads, and a freewheeling diode across the load protects the MOSFET from flyback transients. The AEC-Q101 qualification is critical here: it ensures the part survives underhood and in-cabin thermal stress over the vehicle lifetime.
Recommended
Offline Auxiliary Power Supply Switch
On the secondary side of an offline AC-DC converter, the BSP125H6433XTMA1 acts as a small-signal switch for housekeeping functions such as bias supply gating or synchronous rectification in low-power adapters. The 600V BVDSS provides comfortable margin across rectified 230V AC mains (peak ~325V), so transients will not avalanche the device. Its 120 mA current rating is ample for bias-winding current in adapters below 5W. Mounted on a 1 square-inch copper pour, the tab drain keeps RthJA low enough for 1.8W continuous operation.
Recommended
Industrial Level Shifter
Industrial controllers often need to translate 3.3V or 5V logic levels into 24V control signals for factory-automation actuators. The BSP125H6433XTMA1, with its high BVDSS and small SOT-223 footprint, serves as an open-drain level shifter or a high-side driver stage. A 10 kohm pull-up on the gate to 12V lets a microcontroller GPIO control the device; the source-tied load handles up to 120 mA. The wide 600V safety margin tolerates long cable transients on the 24V rail typical of factory floors.
Recommended
Battery Management Module Switch
In a battery management system (BMS), the BSP125H6433XTMA1 functions as a small balancing or pre-charge switch in 12V/24V battery packs. The 600V rating is overkill for 24V packs but ensures ruggedness against load-dump transients in 24V truck systems. The 120 mA continuous rating is well-matched to balancing currents below 100 mA. The PG-SOT223-4 footprint allows tight placement near the cell-monitoring IC, minimizing trace inductance.
Recommended
LED Driver High-Side Switch
The BSP125H6433XTMA1 can drive the high side of an LED string in automotive interior or exterior lighting applications, where AEC-Q101 qualification and a 600V transient safety margin are required. Driven from a constant-current source, the MOSFET acts as a linear current-regulator pass element for small LED arrays below 120 mA. The exposed tab on the PG-SOT223-4 package provides thermal relief; expect ~80-100 C/W RthJA on a standard 2oz copper pour.
Recommended
Recommended Products Summary
Engineering reference data for BSP125H6433XTMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BSP125H6327XTSA1 | BSP125L6433 | BSP89H6327XTSA1 | BSP772TXUMA1 |
|---|---|---|---|---|---|
| Package | PG-SOT223-4 | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Drain-Source Voltage (V(BR)DSS) | 600 V | 600 V | 600 V | 240 V | 42 V |
| Continuous Drain Current (ID) | 120 mA | 120 mA | 120 mA | [DATA_NEEDED] | 700 mA (logic-level) |
| FET Type | N-Channel Enhancement | N-Channel Enhancement | N-Channel Enhancement | N-Channel Enhancement | N-Channel Enhancement (logic-level) |
| Automotive Qualification | AEC-Q101 | AEC-Q101 | Industrial only | AEC-Q101 | AEC-Q101 |
| Reel Code / Packaging Suffix | H6433XTMA1 | H6327XTSA1 | L6433 | H6327XTSA1 | TXUMA1 |
| RoHS / Lead-Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Key Differentiators
- 600V BVDSS in a small SOT-223 package (vs BSP89H6327XTSA1)
- Automotive-grade AEC-Q101 qualification (vs BSP125L6433)
- Standard (non-logic-level) gate threshold (vs BSP772TXUMA1)
Design Notes
Estimated: At PD=1.8W with TA=25C, the PG-SOT223-4 package RthJA is approximately 80-100 C/W on a 1 square-inch 2oz copper pour. Junction temperature rise is therefore roughly 144-180 C, which exceeds the 150 C TJ max unless the copper pour is enlarged or the actual dissipation is below 1W. Always derate PD by at least 50% for continuous operation, and route the tab land pattern as the primary thermal path with multiple thermal vias.
Use a 10-100 kohm pull-down resistor on the gate to GND to keep the MOSFET off during power-up or controller reset. Place the gate resistor physically close to the gate pin. A 10-100 ohm gate series resistor damps ringing from the gate-source capacitance and limits inrush into the gate. For switching inductive loads, add a flyback diode across the load (1N4148 for small loads, or a Schottky for larger currents).
Do not assume the SOT-223 tab is floating - it is internally bonded to the drain on the BSP125H6433XTMA1. Always provide a copper land under the tab even if you are not designing for thermal dissipation. Exceeding VGS(max) of +/- 20V destroys the gate oxide; ensure the gate drive stays below 15V for safety margin. Avalanche ratings (EAS) must be verified in the datasheet for unclamped inductive switching.
Compliance Information
AEC-Q101 (note: AEC-Q100 vs Q101 - Q101 is the discrete semiconductor standard; AEC-Q100 is for ICs) per digchip datasheet note. Pb-free lead plating. RoHS compliant. Conflict-minerals status not explicitly stated - assume compliant per Infineon's published CMRT.
