Diodes Incorporated DNLS320A-7

Overview

DNLS320A-7 from Diodes Incorporated is a low V_CE(SAT) NPN bipolar junction transistor in SOT-23 package, rated for 20 V V_CEO, 2 A continuous collector current, and 600 mW power dissipation at 25°C ambient. It delivers 220–230 h_FE at IC = 2 A/IB = 40 mA and achieves ≤310 mV V_CE(SAT) at IC = 3 A/IB = 300 mA, enabling efficient medium-power switching in automotive lighting control circuits.

For engineers reviewing the DNLS320A-7 datasheet, DNLS320A-7 pinout, DNLS320A-7 application, or DNLS320A-7 equivalent, key selection criteria include its AEC-Q101 qualification, 209°C/W R_θJA, 100–220 MHz f_T, moisture sensitivity level 1 rating, and complementary PNP pairing with DPLS320A-7.

Technical Context

This NPN transistor uses epitaxial planar die construction to achieve stable gain and low saturation voltage across temperature. Its 20 V V_CBO/V_CEO and 5 V V_EBO ratings support operation in 12 V automotive subsystems with margin against transients.

The device is characterized under pulsed conditions (≤100 ms, ≤0.25 duty cycle) for I_CRP = 3 A and I_CM = 5 A, while DC operation is limited to 2 A with derating above 25°C per Fig. 1. Thermal resistance of 209°C/W assumes FR-4 PCB mounting with Diodes Inc.'s AP02001 pad layout.

Key Specifications

Pinout & Package

Package: SOT-23 - Surface-mount plastic package with matte tin-plated copper leadframe, UL 94V-0 rated molding compound, and moisture sensitivity level 1 per J-STD-020D.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power switching applications.

Compared with ZTX653-7 and MMBT3904-7-F, DNLS320A-7 uniquely balances 2 A continuous current, 20 V rating, and sub-310 mV saturation voltage in AEC-Q101-qualified SOT-23, making it optimal for cost-sensitive 12 V automotive and industrial switching where both current and reliability matter.

Availability

DNLS320A-7 is available at Aetrix Electronics and suitable for automotive lighting control, industrial solenoid actuation, DC-DC converter rectification, and smart home relay driving requiring stable component supply and AEC-Q101 compliance.

Supply support for DNLS320A-7 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 US.

DNLS320A-7 belongs to Diodes' AEC-Q101-qualified low-V_CE(SAT) transistor product line, engineered specifically for robust, thermally efficient switching in automotive body electronics and industrial control modules.

FAQ

What is the maximum allowable junction temperature for DNLS320A-7?

The DNLS320A-7 has an operating junction temperature range of –55°C to +150°C. This limit is defined in the Absolute Maximum Ratings table and applies under all operating conditions. Derating of power dissipation begins at 25°C ambient per Fig. 1, and sustained operation above 150°C risks permanent parametric shift or failure.

Is DNLS320A-7 suitable for linear amplifier applications?

DNLS320A-7 is optimized for switching, not linear amplification. Its h_FE variation across current (150–230) and relatively high V_CE(SAT) make it unsuitable for Class-A audio or precision analog stages. The datasheet specifies no small-signal linearity parameters such as distortion or noise figure, confirming its intended use as a saturated switch.

How does the "Green" designation affect soldering process compatibility?

The "Green" designation indicates halogen-free molding compound meeting IPC-4101D/126 specifications and matte tin plating compliant with MIL-STD-202 Method 208. It supports standard lead-free reflow profiles (peak 260°C), requires no special flux, and exhibits no dewetting or voiding issues when using SnAgCu paste and recommended soak times.

Can DNLS320A-7 be used in parallel configurations for higher current?

Parallel operation is not recommended due to mismatched h_FE and V_BE(SAT) between units, which causes current imbalance and thermal runaway. The datasheet provides no derating guidance or matching specs for paralleling. For >2 A loads, use a single higher-rated device like DMTH3011LPS or implement active current sharing circuitry.