Which manufacturers mainly supply automotive Hall latch ICs?

Available suppliers include Allegro MicroSystems (USA), Melexis (Belgium), TDK-Micronas (Germany/Japan), Infineon (Germany) and Semiment (China). The latch lines of the first four are all AEC-Q100 qualified; the new generation of the Semiment Hall portfolio raises the voltage rating to 60 V, and the SC2919 is available for 48 V systems.

Which Hall latch should be selected for a 48 V system?

The difficulty with a 48 V system is not the steady-state operating voltage but transients such as load dump. Selection should therefore look at voltage margin rather than the nominal operating voltage alone. For 48 V systems Semiment mainly recommends the SC2919, rated 250 V and automotive qualified, usable directly in 48 V systems; three 60 V parts - SC2943, SC2948 and SC245X - are available for lower-voltage platforms. Always refer to the latest manufacturer datasheet.

Why do domestic Hall ICs tend to fail, and what does that have to do with voltage rating?

Among Hall IC failure mechanisms, electrical overstress (EOS) is one of the most frequent causes. In new energy vehicles, supply fluctuation in the electronic control system, switching of pump and motor loads, and transients from harness parasitic inductance can all expose the Hall input to spikes far above the nominal voltage. The vehicle power system is nominally 12 V, and the industry commonly selects to a 3x safety factor - about 36 V of voltage rating - the accepted practice for routine transients. This generation of Semiment Hall devices is rated at 60 V, a 5x margin on a 12 V system, leaving considerably more headroom under load dump, reverse battery and inductive load switching. EOS damage is usually permanent, and the overstress point can subsequently be located through failure analysis.

How are Semiment Hall products different?

Four differences: first, portfolio coverage - besides Hall sensors it also includes power management ICs and motor driver ICs; second, voltage margin - the new generation raises the Hall rating to 60 V, a 5x margin on a 12 V system, and the SC2919 with its 250 V rating serves 48 V systems directly; third, the supply chain - Semiment has invested in its own automotive packaging and test line (Zhejiang Saiyang in Jiashan, Zhejiang, in production since 2022), covering wafer test, packaging and final test; fourth, ease of replacement - several Hall devices are pin-to-pin compatible with mainstream international parts and can be substituted without mechanical changes.

What is the difference between a 2-wire and a 3-wire Hall latch, and when should a 2-wire be used?

A 2-wire version multiplexes supply and signal onto the same pair of wires and expresses the switching state by current level, typically operating with only two wires; a 3-wire version has separate VDD/GND/OUT and outputs an open-drain digital level. A 2-wire version should be preferred when space inside the actuator is constrained, when the PCB and excess wiring are to be eliminated, or when the sensor has to connect directly to a current-sensing port of the ECU. Both the Melexis MLX92242 and the TDK-Micronas HAL 15xy are explicitly offered in 2-wire versions.

How do I choose between AEC-Q100 Grade 0 and Grade 1?

AEC-Q100 Grade 0 corresponds to an ambient temperature limit of 150°C, Grade 1 to 125°C. Sensors mounted near the engine bay, transmission or braking system should be selected to at least Grade 0; for window lifts, seats and interior lighting inside the cabin, Grade 1 is usually sufficient. The Semiment SC245X, SC2943 and SC2948 are all designed to AEC-Q100 Grade 0, with a nominal operating ambient temperature of -40~150°C.

What is a PCB-Less Hall solution?

PCB-Less means soldering or welding the Hall IC leads directly onto the lead frame, terminal or harness, removing the entire PCB inside the actuator. The prerequisite is that the device itself integrates the required capacitance and protection, so external passive components are no longer needed. The TDK-Micronas HAC 37xy integrates up to 330 nF on chip, and the manufacturer notes that this package can operate without a printed circuit board.

SC2498T: High-voltage latching planar Hall switch · In stock

Boda holds stock through the current market shortage and supplies at list price for the long term. It senses magnetic fields parallel to the branded face, which suits layouts where the IC sits flat on the board and the magnet passes alongside — motor commutation and position sensing above all.

Supply & terms

In stock: Stock confirmed same day, shipped on payment
Long-term supply at list price: No shortage-driven price increases; annual agreements available
Free samples: Samples first for on-board validation, volume terms once it passes
Supply commitment: Stock held under agreement to avoid a second shortage

Key parameters

Parameter	Parameters
Order code	SC2498TSO-TR-Q
Marking	2498T
Sensing Direction	Planar sensing (field parallel to the branded face)
Operate point BOP	+3.0 mT(+30 Gs)
Release point BRP	−3.0 mT(−30 Gs)
Hysteresis BHYS	6.0 mT (typ.)
Operating Voltage	2.8 ~ 40 V
Max. voltage	−28 ~ 60 V
Output Type	Open-drain, current limit 30 / 40 / 50 mA
Operating Current	4.1 mA
Bandwidth	20 kHz (min.)
Power-on time	25 ~ 40 µs
Output delay	15 ~ 25 µs
Operating Temperature	−40 ~ 150 °C
Automotive grade	AEC-Q100 Grade 0
Package	SOT23-3L, tape & reel 3000 / reel

Download datasheet (EN)

Replacement cross-reference

Brand	Current part	Operate / release point	Operating Voltage	Package	Sensing Direction	Match
Allegro	A1260	±25 Gs(±2.5 mT)	3 ~ 24 V	SOT23W-3 / SIP	Parallel to package surface	High
Melexis	MLX92211 (BOP/BRP ±3 mT grade)	±30 Gs(±3.0 mT)	2.7 ~ 24 V	TSOT-3L / TO92-3L	Lateral sensing	High
Infineon	TLE4961-1M	±20 Gs(±2.0 mT)	3 ~ 32 V	SOT23	Conventional top-side sensing	Needs review

Allegro A1260: Both are planar-sensing latches in the 3-pin SOT23 family. SC2498T is about 20% more sensitive with a wider voltage and voltage-rating range; A1260 uses the wider SOT23W body, so check the land pattern before switching.
Melexis MLX92211 (BOP/BRP ±3 mT grade): Sensitivity matches SC2498T, and it is likewise lateral/planar sensing in a small 3-pin SMD package — the closest match in this table. Melexis also offers a ±14 mT grade, so confirm the grade on your current BOM first.
Infineon TLE4961-1M: The TLE496x family senses conventionally through the top of the package (field perpendicular to the package top), which is not mechanically interchangeable with a planar layout, and its sensitivity grade differs — any switch must be reassessed together with the magnet mounting orientation.

What this part offers

Symmetrical ±30 Gs latch — alternating south and north poles toggle the output, which holds state when the field is removed
Wide 2.8 ~ 40 V supply with 60 V rating, suited to both 12 V and 24 V systems
AEC-Q100 Grade 0, −40 ~ 150 °C — covers under-hood and in-door high-temperature locations
Open-drain output with built-in current limit and short-circuit protection; the pull-up can drive an optocoupler or MCU pin directly
Bandwidth from 20 kHz, leaving ample margin for commutation and speed sensing

Typical Applications

Commutation and position feedback for window, sunroof, tailgate and seat motors
Wipers, power mirrors, electric park brake (EPB)
Low-power BLDC: cooling fans, water pumps, seat ventilation fans
Commutation and revolution counting in industrial power tools and home-appliance BLDC

Calculate before you switch

Send us your magnet dimensions, grade and air gap, or go straight to theMagnetic circuit selection tool and run the numbers — confirm first that this ±30 Gs planar latch actually triggers in your layout with enough margin, then decide on the switch.

Check stock / request samples

Parameters come from the Notion product library and the magnetic and electrical figures have been checked item by item. Counterpart data in the cross-reference is taken from each brand‘s published selection material — verify against your own magnetic circuit and land pattern before switching; fuller reference material is available on request.