Nexperia USA Inc. BAS21,215

Overview

BAS21,215 from Nexperia is a high-voltage switching diode in SOT23 package, rated for 250 V repetitive peak reverse voltage (VRRM), 200 mA continuous forward current (IF), and 50 ns reverse recovery time (trr). It serves as a fast, low-leakage clamping and polarity protection device in DC-DC converters, relay drivers, and industrial power supply rails.

For engineers reviewing the BAS21,215 datasheet, BAS21,215 pinout, BAS21,215 application, or BAS21,215 equivalent, key selection criteria include verified VRRM ≥250 V, trr ≤50 ns at IF = 30 mA/IR = 30 mA, IR ≤100 nA at VR = 200 V/25 °C, Cd ≤5 pF at 1 MHz, and SOT23-compatible thermal derating to 200 mA at Tamb ≤25 °C.

Technical Context

The BAS21,215 uses a planar epitaxial silicon structure optimized for high-voltage blocking and rapid minority-carrier sweep-out. Its 250 V VRRM rating enables use in 170–200 VAC rectified systems, while its 50 ns trr supports switching frequencies up to ~10 MHz in snubberless flyback and clamp circuits.

Thermal design relies on Rth(j-a) = 500 K/W on FR4 PCB, limiting steady-state dissipation to 250 mW at Tamb ≤25 °C. The 2-pin active configuration (anode/cathode) with internal NC terminal ensures unambiguous polarity orientation and eliminates floating node risks in high-dV/dt environments.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (3-terminal, 1.9 mm pitch, 2.9 × 1.3 × 1.0 mm body); terminals 1 (anode), 2 (not connected), 3 (cathode).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage switching diode applications.

Compared with BAS16,115 and BAV99,215, the BAS21,215 uniquely balances 250 V blocking with 50 ns switching-making it the only option among the three viable for 200 V clamp circuits without external voltage division or series stacking.

Availability

BAS21,215 is available at Aetrix Electronics and suitable for industrial power supply clamping, reverse polarity protection, high-speed signal level shifting, and DC-DC converter snubber applications requiring stable component supply and long-term obsolescence management.

Supply support for BAS21,215 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with manufacturing rooted in process control and automotive-grade quality systems.

The BAS21 belongs to Nexperia's high-voltage switching diode product line, engineered specifically for robust clamping and polarity protection in industrial power conversion, factory automation, and building control systems.

FAQ

Is BAS21,215 suitable for automotive applications?

No. The BAS21,215 is explicitly non-automotive qualified per Nexperia's revision history (v.4, July 2022). It lacks AEC-Q101 qualification, temperature cycling validation beyond 150 °C junction, and automotive-specific reliability testing. For automotive use, Nexperia offers the BAS21-Q series with full AEC-Q101 certification and extended temperature screening.

What is the maximum allowable ambient temperature for continuous 200 mA operation?

Per the derating curve (Fig. 5), the BAS21,215 supports 200 mA continuous forward current only up to Tamb = 25 °C on a standard FR4 PCB. Above 25 °C, current must be linearly reduced-e.g., to 100 mA at Tamb = 75 °C-to maintain Tj ≤ 150 °C and avoid thermal runaway.

Can pin 2 (n.c.) be used as a heatsink pad or grounded for thermal improvement?

No. Pin 2 is internally not connected-no bond wire or die attachment exists. Soldering or grounding it provides zero thermal or electrical benefit and risks mechanical stress on the mold compound. Thermal performance depends solely on pins 1 and 3 solder joint quality and PCB copper area.

How does BAS21,215 compare to BAS21,235 in marking and packaging?

BAS21,215 denotes tape-and-reel packaging per EIA-481 standard with 3,000 units per reel and JS% top-side marking (where % = manufacturing site code). BAS21,235 indicates same die and specs but in 10,000-unit reels with identical marking-no electrical or thermal differences exist between the two order codes.