Diodes Incorporated S2KA-13

Overview

S2KA-13 from Diodes Incorporated is a glass passivated surface-mount silicon rectifier diode rated for 800 V peak repetitive reverse voltage (VRRM), 1.5 A average forward current (I(AV)) at 100°C terminal temperature, and 50 A non-repetitive surge current (IFSM); it delivers 1.15 V forward voltage at 1.5 A and exhibits only 5.0 µA reverse leakage at 25°C, making it suitable for AC/DC front-end rectification in industrial power supplies.

For engineers reviewing the S2KA-13 datasheet, S2KA-13 pinout, S2KA-13 application, or S2KA-13 equivalent, key selection considerations include its SMB package thermal resistance (20 °C/W), 800 V blocking capability under 60 Hz half-wave resistive/inductive loads, RoHS-compliant matte tin finish, and derating guidance for capacitive loads.

Technical Context

This device operates as a single-phase, half-wave rectifier optimized for automated SMT assembly. Its glass passivated die construction ensures stable reverse characteristics across -65°C to +150°C operating range and enables reliable operation at junction temperatures up to 150°C.

It is not intended for full-bridge or synchronous rectification. Performance is specified per JEDEC Method for IFSM testing, with forward voltage measured at IF = 1.5 A and reverse current validated at rated DC blocking voltage (VR = 800 V) and elevated temperature (125°C).

Key Specifications

Pinout & Package

S2KA-13 uses the SMB (DO-214AA) surface-mount package: molded plastic case, UL 94V-0 rated, cathode marked by band, approximate weight 0.093 g. Dimensions: A = 3.30–3.94 mm, B = 4.06–4.57 mm, C = 1.96–2.21 mm, E = 5.00–5.59 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR160 and VS-1N5408-M3/54, S2KA-13 uniquely balances 800 V blocking, 1.5 A continuous rating, SMB SMT compatibility, and 1.15 V low forward drop-making it optimal for space-constrained, high-reliability AC/DC front ends where transient immunity and thermal efficiency are jointly critical.

Availability

S2KA-13 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver input stages, motor control board input rectification, and appliance mainboard power entry requiring stable component supply and long-lifecycle support.

Supply support for S2KA-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the Philippines.

S2KA-13 belongs to the S2x/A series of glass-passivated rectifiers engineered for high-reliability, cost-sensitive AC/DC conversion in industrial and consumer power applications where thermal stability and surge robustness are essential.

FAQ

What is the maximum allowable junction temperature for S2KA-13?

The absolute maximum junction temperature is +150°C, consistent with its specified operating and storage temperature range of -65°C to +150°C. Derating curves in the datasheet show that average forward current drops to zero at 160°C terminal temperature, confirming thermal limits are enforced via junction-to-terminal resistance (20 °C/W) and PCB copper pad heatsinking.

Can S2KA-13 be used in full-wave bridge configurations?

Yes, S2KA-13 can be used in discrete full-wave bridge rectifiers, but it must be paired with three identical units to ensure matched VFM and thermal behavior. The device itself is a single diode; no internal bridge integration exists. Layout symmetry and thermal coupling between diodes are critical to prevent current imbalance.

Is S2KA-13 compatible with lead-free reflow soldering processes?

Yes, S2KA-13 features a matte tin finish compliant with J-STD-020C Level 1 moisture sensitivity and qualified for standard Pb-free reflow profiles (peak temperature ≤ 260°C). Its UL 94V-0 mold compound and glass passivation ensure reliability through multiple thermal cycles without delamination or parametric shift.

How does capacitive load affect S2KA-13 current rating?

For capacitive loads, the average forward current rating must be derated by 20% per the datasheet. This accounts for higher peak currents drawn during capacitor charging, which increases junction temperature and accelerates wear-out. At 100°C terminal temperature, the usable I(AV) reduces from 1.5 A to 1.2 A under pure capacitive loading conditions.