BTS3134NHUMA1 - 42V 3A Smart Low-Side Power Switch | Infineon
料号： BTS3134NHUMA1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.05 | $105.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.78 | $780.00 |
BTS3134NHUMA1 概述
A smart low-side power switch is a power distribution switch that controls a load (relay, solenoid, lamp, LED string) by pulling the low side to ground through an internal N-channel MOSFET when activated by a logic-level input. It is functionally and architecturally equivalent to a discrete N-channel MOSFET plus gate driver plus protection circuitry, integrated into a single IC. Smart low-side switches sit within the broader hierarchy of power distribution switches, which in turn belong to the power management IC family.
Key features include an operating supply range up to 42 V, an R_DS(on) of approximately 50 mΩ typical, integrated over-current, over-temperature, over-voltage, and ESD protection, plus a status flag output for fault feedback. The 3 A continuous drain current makes it well-suited to automotive body and chassis loads such as lamps, relays, and small motors. The exposed tab of the PG-SOT223-4 package acts as a thermal pad, allowing the part to dissipate the load current without external heatsinking at moderate duty cycles.
The BTS3134NHUMA1 uses Infineon's SIPMOS technology - a vertical power MOSFET process optimized for low-voltage, high-current switching with integrated CMOS control logic. This monolithic integration eliminates the need for a discrete gate driver and external protection circuitry, reducing PCB area and improving reliability. The AEC-Q100 qualification ensures the part meets automotive stress-test requirements for temperature, humidity, and vibration.
Typical applications include automotive body electronics such as lamp drivers, relay replacement, solenoid and valve control, LED driver circuits, and general 12 V / 24 V automotive load switching. The 42 V maximum rating also provides headroom for 24 V truck and industrial bus systems with load-dump transients.
When designing with this device, ensure that the input pin is driven from a logic-level source (3.3 V or 5 V CMOS) and that the exposed tab is soldered to a sufficient copper pour (typically 1 square inch minimum) to keep junction temperature within the -40°C to +150°C operating range under worst-case load.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer product page alone.
直接替换替代料： BTS3134NHUMA1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： BTS3134NHUMA1 （相同外形与封装尺寸） ——差异在于 Package, Diagnostic Output, Operating Temperature Range, Topology, Automotive Qualification.
快速对比工具——选择替代料号进行并排对比：
BTS3118NHUMA1
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.62 / 个
查看数据手册 →BTS3125E
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BTS4140N
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BTS50085-1TMA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BTS3134NHUMA1 最大额定值与电气特性
| Manufacturer | Infineon Technologies |
| Product Type | Smart Low-Side Power Switch |
| 拓扑 | 1:1 N-Channel Switch/Driver |
| Maximum Operating Voltage | 42 V |
| Continuous Output Current | 3 A |
| On-State Resistance (R_DS(on)) | 50 mΩ typical |
| Input Logic Level | CMOS / TTL compatible |
| 封装 | PG-SOT223-4 (4-pin, 3+Tab) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40 °C to +150 °C |
| Automotive Qualification | AEC-Q100 |
| Protection Features | Over-current, Over-temperature, Over-voltage, ESD |
| Status Flag Output | Yes (diagnostic feedback) |
| Technology | SIPMOS (vertical N-channel MOSFET + CMOS logic) |
| RoHS 状态 | Compliant |
| Packaging | Tape & Reel |
BTS3134NHUMA1 引脚配置
| 引脚 1 | IN — Logic-level input (drives gate) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | VCC / STATUS — Supply voltage and diagnostic status flag |
| 引脚 4 | OUT (Tab) — Switched output drain to load (connected to exposed tab) |
典型应用
BTS3134NHUMA1 适用于 6 应用s: Automotive Lamp Driver (12V Headlamp / Indicator), Relay and Solenoid Replacement, 24V Truck and Commercial Vehicle Load Switching, LED Driver and Indicator Strip Switching, Industrial 24V PLC Output Module, Automotive Body Control Module (BCM) Load Driver.
Automotive Lamp Driver (12V Headlamp / Indicator)
The BTS3134NHUMA1 is well-matched to driving automotive 12 V incandescent and LED lamps as a low-side switch. Its 3 A continuous rating comfortably handles a single 21 W turn-signal bulb (~1.75 A) or a high-power LED string with margin, while the 42 V maximum rating absorbs load-dump transients per ISO 7637-2 without external TVS protection. The integrated over-current and over-temperature shutdown protect the bulb and wiring during short-to-ground faults, eliminating the fuse in many designs. The status flag output feeds back to the body control module (BCM) for diagnostic feedback (lamp outage detection) required by modern automotive lighting standards.
推荐
Relay and Solenoid Replacement
The BTS3134NHUMA1 replaces traditional automotive relays and solenoids in body-electronics applications such as door locks, HVAC flaps, and washer pumps. Drawing less than 5 mA from the logic-level IN pin, it can be driven directly from a microcontroller GPIO, eliminating the relay coil, flyback diode, and suppression hardware. The internal SIPMOS avalanche clamping handles the inductive kickback of the solenoid coil at turn-off, with R_DS(on) of 50 mΩ keeping conduction loss under 0.5 W at 3 A. AEC-Q100 qualification ensures reliable operation across -40 °C to +125 °C ambient automotive temperature ranges.
推荐
24V Truck and Commercial Vehicle Load Switching
For 24 V truck, bus, and off-highway vehicle electrical systems, the BTS3134NHUMA1 provides robust load-switching capability with 42 V maximum rating delivering 18 V of headroom above the 24 V nominal rail. This covers load-dump pulses per ISO 7637-2 Pulse A and Pulse B without external suppression. The 3 A rating supports typical truck loads such as marker lamps, mirror heaters, and small DC motors in the cab and chassis. The exposed PG-SOT223-4 tab efficiently dissipates the higher conduction losses inherent to 24 V systems, maintaining junction temperature within the AEC-Q100 envelope.
推荐
LED Driver and Indicator Strip Switching
In LED driver and indicator applications, the BTS3134NHUMA1 functions as a low-side PWM switch for dimming and color-mixing LED strings. The logic-level IN pin accepts a 3.3 V or 5 V PWM signal directly from an MCU, enabling smooth dimming control without additional driver stages. The 50 mΩ R_DS(on) keeps conduction losses low at 1-2 A LED currents, while the integrated over-temperature protection prevents thermal runaway if the LED string shorts. The status flag can alert the host controller to open-circuit LED conditions, useful for safety-critical indicator applications.
推荐
Industrial 24V PLC Output Module
Industrial PLC digital output modules use the BTS3134NHUMA1 to switch 24 V DC loads such as solenoids, contactors, and indicator lamps from a logic-level backplane signal. Its 42 V rating tolerates the over-voltage transients common on factory 24 V busses, while the 3 A rating covers most discrete industrial outputs without needing a higher-current module. The status flag enables per-channel fault reporting to the PLC CPU, supporting predictive maintenance and reducing field-service callouts. The SIPMOS technology provides a Mean Time Between Failures (MTBF) far exceeding electromechanical relays.
推荐
Automotive Body Control Module (BCM) Load Driver
Inside an automotive Body Control Module, the BTS3134NHUMA1 serves as the output stage driving miscellaneous loads such as wipers, washer pumps, mirror adjusters, and interior lighting. Its AEC-Q100 qualification is essential for under-hood or cabin-mounted BCMs exposed to wide temperature swings. The small PG-SOT223-4 footprint allows multiple switches to be placed in a compact BCM PCB area, and the integrated protection circuitry reduces the bill of materials versus discrete MOSFET designs. The diagnostic status pin connects directly to the BCM microcontroller for OBD-II compliant fault reporting.
推荐
推荐产品汇总
工程参考数据： BTS3134NHUMA1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | BTS3118NHUMA1 | BTS3125E | BTS4140N | BTS50085-1TMA |
|---|---|---|---|---|---|
| Package | PG-SOT223-4 | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon |
| Switch Type | Low-side | Low-side | Low-side | Low-side | High-side |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes |
| Technology | SIPMOS | SIPMOS | SIPMOS | SIPMOS | SIPMOS |
关键差异点
- Highest current rating in PG-SOT223-4 BTS3xxx family （对比 BTS3118NHUMA1)
- Lower R_DS(on) than lower-current BTS siblings （对比 BTS3118NHUMA1)
- True low-side topology for load-grounded designs （对比 BTS50085-1TMA)
设计说明
Estimated: At 3 A continuous load with 50 mΩ R_DS(on), conduction loss is approximately 0.45 W at 25 °C junction. With PG-SOT223-4 theta_JA of ~80 °C/W on a 1 sq inch copper pour, junction rise is ~36 °C above ambient. At 150 °C junction limit, ambient maximum is roughly 114 °C - well within AEC-Q100 Grade 1. For continuous 3 A operation above 85 °C ambient, increase PCB copper area to at least 2 sq inches or derate current.
Solder the exposed tab to a copper pour of at least 1 square inch on the top or bottom layer. Use multiple thermal vias (0.3 mm drill, 1 mm pitch) under the tab to conduct heat to internal or opposite-side copper planes. Place input bypass (100 nF) close to the VCC pin and keep the IN trace short to minimize noise coupling into the gate driver. Maintain creepage distance on the OUT pin to adjacent high-voltage traces for 42 V-rated designs.
Do not connect the exposed tab to GND - the tab is internally bonded to the OUT (drain) terminal. Reversing IN and GND will prevent the switch from turning on. Do not exceed 42 V on OUT, even transiently; add a 36 V TVS such as SMBJ36CA on the supply rail for harsh load-dump environments. Do not drive the IN pin below -0.3 V or above VCC + 0.3 V to avoid latch-up of the CMOS input structure.
合规信息
AEC-Q100 automotive qualified per Infineon product page. RoHS and REACH compliant. Lead-free and halogen-free per SIPMOS product family datasheet.
