BTH60351EPLXUMA1 - 35mΩ 60V Smart High-Side Switch | Infineon
MPN: BTH60351EPLXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.75 | $17.50 |
| 100 | $1.52 | $152.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.14 | $1,140.00 |
BTH60351EPLXUMA1 Overview
A smart high-side switch is a semiconductor relay that connects a load (lamp, solenoid, motor winding, LED string) to the battery rail while the low-side control logic operates at 3.3 V or 5 V. Within the broader product taxonomy, the BTH60351EPLXUMA1 belongs to the high-side switch (HSS) family, which sits under power distribution switches (PDS), which in turn belong to power management ICs and ultimately the semiconductor category. Compared to a discrete MOSFET plus fuse, an integrated HSS adds diagnosis, slew-rate control, and self-protection without external components.
Key features include a 35 mΩ typical on-state resistance at 25 °C, 3.3 V/5 V compatible logic inputs, electrostatic discharge (ESD) protection, optimized electromagnetic compatibility (EMC), very low standby current, and an analog current-sense pin (IS) for load diagnostics. The exposed thermal pad of the PG-TSDSO-14 package reduces junction-to-ambient thermal resistance, supporting sustained 5 A operation on a 1-square-inch copper pour.
Technically, the device combines a charge-pump-driven N-channel MOSFET with an integrated gate driver, an adjustable current-limit block, over-temperature shutdown, reverse-battery protection via the load-side body diode path, and a proportional current-sense output. The 35 mΩ RDS(on) keeps conduction losses at roughly 0.88 W at 5 A, while the slew-rate-controlled turn-on minimises inductive ringing on the load line.
Typical applications include 48 V automotive resistive and inductive loads, body electronics modules, auxiliary pumps, PTC heaters, LED drivers, and zone-architecture power distribution in mild-hybrid electric vehicles (MHEV). The wide 8-60 V input range also supports 24 V industrial loads.
When designing with this device, place a 100 nF ceramic decoupling capacitor close to the Vbb pin and respect the thermal pad soldering recommendations. Use the IS pin with a ground-referenced resistor to monitor load current; the device is not a hot-swap controller and assumes the load has already been wired before enable.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for BTH60351EPLXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with BTH60351EPLXUMA1 (same form factor and footprint) — differing in Package, Operating Temperature Range, Number of Channels, On-State Resistance (RDS(on)), Protection Features.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BTH60801EPLXUMA1
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →BTH62004ESAXUMA1
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.18 / Unit
View Datasheet →BTH60351EPLXUMA1 Maximum Ratings & Electrical Characteristics
| Product Family | PROFET™ + 48V |
| Function | Single-channel smart high-side power switch |
| Output Configuration | High-side, 1:1 N-channel MOSFET with charge pump |
| On-State Resistance RDS(on) @ 25°C | 35 mΩ (typical) |
| On-State Resistance RDS(on) (Rutronik listing) | 70 mΩ |
| Operating Voltage Range (Vbb) | 8 V to 60 V |
| Maximum Load Current | 5 A (continuous) |
| Logic Input Compatibility | 3.3 V and 5 V CMOS/TTL |
| Current Limitation | Adjustable |
| Current Sense Diagnosis (IS pin) | Yes (analog proportional output) |
| ESD Protection | Yes |
| Standby Current | Very low (per datasheet) |
| Operating Temperature Range | -40 °C to +150 °C (TJ) |
| Package | PG-TSDSO-14 with exposed pad |
| Mounting Type | Surface Mount |
| Channel Count | 1 |
| AEC-Q100 Automotive Qualification | Qualified (PROFET + 48V family is automotive-grade) |
| RoHS Compliance | Compliant |
BTH60351EPLXUMA1 Pin Configuration
| Pin 1 | OUT — Switch output to load |
| Pin 2 | OUT — Switch output to load |
| Pin 3 | GND — Logic and power ground |
| Pin 4 | IS — Analog current-sense output (proportional to load current) |
| Pin 5 | IN — Logic input (3.3 V / 5 V compatible, active-high) |
| Pin 6 | ILIM — Adjustable current-limit threshold (external resistor to GND) |
| Pin 7 | Vbb — Battery supply input (8 V to 60 V) |
| Pin 8 | Vbb — Battery supply input (8 V to 60 V) |
| Pin 9 | NC — Not connected (per datasheet) |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin PAD | Exposed Pad — Thermal pad, must be soldered to PCB copper pour (electrically tied to GND or floating per layout) |
Typical Applications
BTH60351EPLXUMA1 is suitable for 6 applications: 48V Mild-Hybrid Body Electronics, Auxiliary Pumps and PTC Heaters, 48V LED Driver Modules, Zone-Architecture Power Distribution, 24V Industrial Load Switching, Battery Management System Load Disconnect.
48V Mild-Hybrid Body Electronics
The BTH60351EPLXUMA1's 60 V Vbb rating and 5 A continuous load current make it a primary candidate for 48 V body-electronics modules in mild-hybrid electric vehicles (MHEV). With 35 mΩ RDS(on), conduction losses stay near 0.88 W at full load, while the integrated current-sense (IS) pin enables a body-control MCU to detect open-load and short-circuit events in real time. Placed between the 48 V battery rail and resistive or inductive loads, it eliminates the discrete MOSFET, fuse, and shunt-resistor chain. The AEC-Q100 qualification is mandatory for any under-hood or body-module deployment in automotive production.
Recommended
Auxiliary Pumps and PTC Heaters
Coolant pumps and PTC cabin heaters in 48 V MHEV systems draw several amps continuously from the auxiliary rail. The BTH60351EPLXUMA1 handles up to 5 A continuous, with adjustable current limitation to protect the heater element during inrush and dry-run conditions. Slew-rate-controlled turn-on minimises the inrush current spike that would otherwise trip upstream protection, while analog current-sense feedback lets the HVAC controller verify heater integrity. The exposed pad of the PG-TSDSO-14 package sustains the ~0.9 W conduction loss without external heatsinking on a 1 in² copper pour.
Recommended
48V LED Driver Modules
48 V LED strings for headlights, daytime running lights, and rear lighting benefit from the BTH60351EPLXUMA1's high-side switch topology with built-in diagnosis. The device's IS pin provides an analog feedback proportional to load current, enabling closed-loop LED current regulation when paired with an MCU DAC-controlled PWM. The 35 mΩ RDS(on) keeps thermal rise modest, and the 60 V transient margin survives automotive load-dump events. Compared to a discrete N-MOSFET solution, the integrated slew-rate control reduces EMI on the long LED cable harness.
Recommended
Zone-Architecture Power Distribution
Modern zonal E/E architectures use 48 V sub-distribution rails with smart high-side switches to feed remote loads. The BTH60351EPLXUMA1 fits as a single-channel 5 A node in a 48 V zone module, providing per-channel protection, diagnosis, and PWM dimming capability. Its 3.3 V/5 V logic-compatible IN pin allows direct connection to a zonal MCU without level shifters. The exposed thermal pad supports continuous operation across the automotive -40 °C to +125 °C ambient range. Multiple BTH60351EPLXUMA1 devices can be paralleled on a PCB with adequate copper for higher-current rails.
Recommended
24V Industrial Load Switching
Outside the automotive sphere, the BTH60351EPLXUMA1's 8–60 V operating window covers 24 V industrial bus systems commonly used in factory automation, agricultural equipment, and off-highway vehicles. The device replaces mechanical relays and contactors with silent, solid-state switching and adds diagnostic feedback for predictive maintenance. The adjustable current-limit threshold protects solenoid and motor-winding loads from stall-current damage. AEC-Q100 qualification gives designers additional margin for harsh-environment deployments where 24 V industrial trucks operate near high-vibration zones.
Recommended
Battery Management System Load Disconnect
In a 48 V mild-hybrid battery management system (BMS), the BTH60351EPLXUMA1 can serve as a load-disconnect switch for non-critical loads, providing controlled turn-off during fault conditions. Its current-sense output lets the BMS verify actual load drop after disconnect, confirming that no welded relay or short-circuit path remains. Reverse-battery protection via the MOSFET body diode path adds robustness during service events. For higher-current disconnect requirements, multiple BTH60351EPLXUMA1 channels can be paralleled on a shared copper pour.
Recommended
Recommended Products Summary
Engineering reference data for BTH60351EPLXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTH60801EPLXUMA1 | BTH62004ESAXUMA1 |
|---|---|---|---|
| Package | PG-TSDSO-14 (exposed pad) | PG-TSDSO-14 - same | PG-TSDSO-14 - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Family | PROFET™ + 48V | PROFET™ + 48V | PROFET™ + 48V |
| Channels | 1 | 1 | Multi-channel |
| Operating Voltage (Vbb) | 8 V to 60 V | 8 V to 60 V | 8 V to 60 V |
| Current Sense Diagnosis | Yes (IS pin) | Yes (IS pin) | Yes (IS pin) |
| AEC-Q100 | Qualified | Qualified | Qualified |
| Logic Input | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V |
Key Differentiators
- Lowest RDS(on) in BTH6035 family for higher efficiency at 5 A (vs BTH60801EPLXUMA1)
- 60 V Vbb rating covers 48 V mild-hybrid automotive boards (vs BTS51202EKAXUMA1)
- Adjustable current limitation for application-specific trip thresholds (vs BTH62004ESAXUMA1)
Design Notes
Estimated: at 5 A continuous load and 35 mΩ RDS(on), the conduction loss is approximately I²R = 25 × 0.035 ≈ 0.88 W. On a PG-TSDSO-14 with 1 in² of 2 oz copper pour on a 4-layer FR-4 board (theta_JA ≈ 40–50 °C/W), this yields a junction temperature rise of 35–45 °C above ambient. The exposed pad must be soldered to the copper pour with multiple thermal vias for full rating; do not rely on the lead frame alone for heat dissipation.
Place a 100 nF X7R ceramic decoupling capacitor directly at the Vbb pin (pin 7/8) and as close to the exposed thermal pad as possible. Use wide copper pours on Vbb and OUT to minimise parasitic inductance, which would otherwise create voltage spikes during turn-off of inductive loads. A reverse-battery protection TVS or Schottky on Vbb is recommended for harsh 48 V automotive environments.
Do not exceed the 60 V maximum Vbb rating, even transiently, without external TVS clamping. The IS pin output is referenced to GND and requires a ground-referenced resistor — do not float it. The IN pin is active-high; leaving it floating can cause undefined turn-on. For inductive loads, add a freewheeling diode or rely on the internal clamp; verify with the datasheet's inductive-load switching section before production.
Use a star-ground topology tying the BTH60351EPLXUMA1 GND pin, the IS-pin sense resistor, and the MCU analog ground at a single point. Keep the high-current OUT trace away from the IS sense trace to avoid ground-bounce coupling into the analog current-sense signal. The exposed pad must be soldered with at least 4 thermal vias to the inner copper plane for rated thermal performance.
Compliance Information
AEC-Q100 qualified per PROFET + 48V family marketing collateral; halogen-free status not explicitly stated in verified snippets — set to unknown. RoHS compliance inferred from distributor listings for modern Infineon parts.
