Taiwan Semiconductor Corporation RS2GALH

Overview

RS2GALH from Taiwan Semiconductor is a 2 A, 400 V fast recovery surface-mount rectifier in Thin SMA package, featuring 150 ns reverse recovery time, 1.01 V forward voltage at 2 A/25°C, and AEC-Q101 qualification for automotive use in DC/DC converters and snubber circuits.

For engineers reviewing the RS2GALH datasheet, RS2GALH pinout, RS2GALH application, or RS2GALH equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (R_θJL = 16 °C/W), junction temperature range (–55 to +175 °C), and glass-passivated die construction for reliability in high-reliability power conversion designs.

Technical Context

This device is a single-die, unidirectional silicon rectifier optimized for fast switching in medium-voltage, medium-current applications. Its glass-passivated junction ensures stable leakage performance across temperature, while the Thin SMA package enables automated placement and supports high-density PCB layouts.

The RS2GALH operates with low forward conduction loss and tightly controlled reverse recovery behavior-critical for minimizing switching losses in flyback and forward converter freewheeling paths. Its R_θJA of 73 °C/W (on 5 mm × 5 mm Cu pad) and moisture sensitivity level 1 confirm suitability for reflow-soldered automotive and industrial assemblies.

Key Specifications

Pinout & Package

Thin SMA package: surface-mount, single-anode/single-cathode configuration with cathode band marking; 4.40 mm × 2.70 mm × 1.20 mm body, matte tin-plated leads, JEDEC DO-221AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Compared with STTH2R04 and MUR240, the RS2GALH uniquely balances AEC-Q101 compliance, low-profile SMT packaging, and mid-range t_rr/V_F trade-off-making it optimal for space-constrained, thermally managed automotive and industrial DC/DC converters requiring validated reliability.

Availability

RS2GALH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber circuits, and freewheeling diode applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for RS2GALH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and power discrete manufacturer headquartered in Hsinchu, Taiwan, specializing in high-reliability silicon rectifiers, TVS devices, and MOSFETs for automotive and industrial markets.

The RS2GALH belongs to TSC's RS2xALH fast recovery rectifier family, engineered specifically for AEC-Q101-compliant, high-efficiency power conversion in space-constrained automotive and industrial systems.

FAQ

What is the maximum junction temperature rating for RS2GALH?

The RS2GALH has a maximum junction temperature (T_J) of +175 °C, verified per absolute maximum ratings in the official datasheet. This rating allows reliable operation in under-hood automotive environments and high-ambient industrial enclosures. Derating curves confirm usable current capacity down to –55 °C, and thermal resistance values (R_θJL = 16 °C/W) support accurate junction temperature estimation in real-world PCB layouts. The RS2GALH must be operated within this limit to maintain AEC-Q101 reliability compliance.

Is RS2GALH suitable for reflow soldering without moisture preconditioning?

Yes, RS2GALH is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. Its hermetically sealed Thin SMA package and glass-passivated die ensure robustness against popcorning or delamination during standard lead-free reflow profiles. This eliminates process overhead in high-volume SMT lines and confirms compatibility with automated placement and reflow workflows used for RS2GALH in automotive module manufacturing.

What does the "ALH" suffix indicate in RS2GALH?

The "ALH" suffix in RS2GALH denotes Taiwan Semiconductor's standardized packaging and qualification variant: "A" = Thin SMA package, "L" = AEC-Q101 qualified, "H" = halogen-free and RoHS-compliant construction. This coding aligns with TSC's internal ordering nomenclature and distinguishes RS2GALH from non-automotive or non-halogen-free versions (e.g., RS2GA). The RS2GALH marking code printed on the device body is "RS2GAH", confirming its identity within the RS2xALH family.

How does RS2GALH compare to RS2DALH in forward voltage performance?

At 2 A and 25 °C, RS2GALH specifies V_F = 1.01 V, while RS2DALH specifies V_F = 0.93 V under identical conditions-reflecting the inherent trade-off between higher blocking voltage and forward conduction loss. Both share identical package, thermal metrics, and AEC-Q101 qualification. The RS2GALH's 400 V rating makes it more suitable than RS2DALH (200 V) for 24 V–48 V bus applications where higher reverse margin is required, despite the 80 mV higher V_F.

Can RS2GALH replace RS2JALH in a 600 V design?

No, RS2GALH is not a functional replacement for RS2JALH in 600 V designs because its V_RRM is only 400 V-below the required 600 V reverse blocking margin. Exceeding V_RRM risks catastrophic avalanche failure and violates safety margins defined in IEC 62368-1 and AEC-Q101. While both share the same Thin SMA package and thermal characteristics, RS2JALH's 600 V rating, 250 ns t_rr, and higher leakage (40 µA @ 125 °C) reflect its distinct voltage-class optimization. Use RS2GALH only where system-level reverse voltage remains ≤400 V.