onsemi SNSM3005NZTAG

Overview

SNSM3005NZTAG from onsemi is a dual-function discrete semiconductor combining a 30 V, 500 mA PNP bipolar junction transistor and a 20 V, 224 mA N-channel MOSFET in a single UDFN6 package. It serves as an integrated switch pair for low-power load control and signal-level translation in portable electronics, with confirmed V_CEO = 30 V, I_C = 500 mA, V_DSS = 20 V, I_D = 224 mA, and R_DS(on) = 0.65 Ω @ V_GS = 4.5 V.

For engineers reviewing the SNSM3005NZTAG datasheet, pinout, applications, or equivalent options, this device enables compact dual-switch topologies in space-constrained battery-powered systems where coordinated BJT/MOSFET switching-such as LED driver biasing or logic-level translation with current gain-is required without separate discrete placement.

Technical Context

The SNSM3005NZTAG integrates two independent active devices sharing thermal and layout advantages of monolithic packaging: Q1 operates as a standard PNP BJT with h_FE = 20–100 (I_C = 30–500 mA), V_CE(sat) ≤ 0.4 V, and V_BE(sat) ≤ 1.1 V; Q2 functions as a logic-level N-channel MOSFET with V_GS(th) = 0.4–1.0 V, R_DS(on) = 0.65–4.3 Ω across gate drive conditions, and body diode forward voltage V_SD = 0.55–1.0 V.

Both devices share a common thermal path via the exposed pad in the UDFN6 (1.6 × 1.6 mm, 0.5 mm pitch) package, with R_JA = 245 °C/W and maximum junction temperature T_J = 150 °C. The structure supports synchronous or complementary switching schemes where the BJT controls base drive while the MOSFET handles higher-efficiency power switching, verified by pulsed drain current I_DM = 673 mA and steady-state ID ratings at TA = 25°C/85°C.

Key Specifications

Pinout & Package

Package: UDFN6 (1.6 × 1.6 mm, 0.5 mm pitch), Case 517AT, with exposed thermal pad (COOL™ technology). RoHS-compliant, Pb-free, halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-transistor switching applications.

Compared with NSM3005NXT1G, SNSM3005NZTAG delivers 23% better thermal performance and tighter gate threshold distribution; compared with DMN3029LSD-13, it eliminates interconnect parasitics and timing skew between BJT and MOSFET paths, enabling sub-100 ns synchronized switching.

Availability

SNSM3005NZTAG is available at Aetrix Electronics and suitable for portable devices, USB-powered peripherals, IoT sensor nodes, and wearable electronics requiring stable component supply with guaranteed long-term manufacturability.

Supply support for SNSM3005NZTAG 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

onsemi (Semiconductor Components Industries, LLC) is a global supplier of energy-efficient semiconductor solutions, specializing in automotive, industrial, cloud, and IoT applications with emphasis on reliability and sustainability.

The SNSM3005NZTAG belongs to onsemi's Small Signal BJT and MOSFET family, designed specifically for space-constrained portable electronics where integration of complementary switching elements reduces footprint, improves thermal coupling, and simplifies PCB routing.

FAQ

What is the maximum continuous drain current for the MOSFET portion of SNSM3005NZTAG at 85°C ambient?

The MOSFET portion of SNSM3005NZTAG supports 162 mA continuous drain current at T_A = 85°C, as specified in the "Q2 MAXIMUM RATINGS" table. This derating from 224 mA at 25°C reflects thermal limitations of the UDFN6 package under natural convection; forced airflow or copper pour can extend usable current.

Can the BJT and MOSFET in SNSM3005NZTAG be operated simultaneously without interference?

Yes - the BJT (Q1) and MOSFET (Q2) in SNSM3005NZTAG are electrically isolated except for shared thermal mass and the common Pin 5/6 node. Their control terminals (base and gate) are fully independent, allowing simultaneous or staggered switching with no cross-talk, as confirmed by separate V_BE and V_GS characterization curves.

What is the recommended PCB layout for optimal thermal performance of SNSM3005NZTAG?

For optimal thermal performance, the exposed pad of SNSM3005NZTAG must be soldered to a minimum 1 in² copper area (1 oz Cu, including traces) per the datasheet Note 1. Use ≥4 thermal vias (0.3 mm diameter) connecting the pad to inner-layer ground planes, and avoid solder mask over the pad to ensure full thermal contact.

Does SNSM3005NZTAG include ESD protection on its gate and base terminals?

No - SNSM3005NZTAG does not integrate on-die ESD protection for the MOSFET gate or BJT base. External protection (e.g., 100 Ω series resistor + 5.6 V TVS to ground on gate; 1 kΩ base resistor) is required per IEC 61000-4-2 Level 2 (4 kV contact) compliance in handheld applications.

Is SNSM3005NZTAG suitable for use in automotive infotainment modules?

SNSM3005NZTAG is not AEC-Q101 qualified and lacks automotive-grade screening; its specified operating temperature range (−55°C to +150°C) meets ambient requirements, but qualification data for HTOL, ESD, and mechanical stress is not published. It may be used in non-safety-critical consumer-facing infotainment subsystems with additional system-level validation.