onsemi 2SD1348SC-T-ND

Overview

2SD1348SC-T-ND from SANYO Semiconductor is an NPN epitaxial planar silicon power transistor designed for switching applications in high-current, medium-voltage circuits. It delivers 4 A continuous collector current, 50 V collector-emitter breakdown voltage, and low 0.19 V typical V_CE(sat) at I_C = 2 A / I_B = 100 mA - enabling efficient relay drivers, lamp drivers, and industrial power supply output stages.

For engineers reviewing the 2SD1348SC-T-ND datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-126 package thermal performance (10 W at T_c = 25°C), wide ASO (Area of Safe Operation), FBET/MBIT process-derived low saturation voltage, and verified h_FE range of 100–560 at I_C = 100 mA.

Technical Context

This device operates as a general-purpose NPN bipolar junction transistor optimized for linear and switching modes in DC-controlled loads. Its design emphasizes robust safe operating area (ASO) under pulse and DC conditions, supported by 6 A peak collector current capability and 150 MHz gain-bandwidth product for moderate-speed switching.

The 2SD1348SC-T-ND uses SANYO's FBET (Flat Base Emitter Transistor) and MBIT (Multi-Buried-Insulator Transistor) processes to achieve low V_CE(sat) and stable h_FE across current ranges - with minimum h_FE = 40 at I_C = 3 A and V_CE = –2 V, confirming suitability for base-driven power stage designs requiring predictable current gain at high load.

Key Specifications

Pinout & Package

2SD1348SC-T-ND is housed in a through-hole TO-126 package (SANYO designation), featuring a metal tab connected to the collector for direct heatsinking. The package measures 15.5 mm × 8.0 mm × 4.0 mm (L×W×H) with 3.0 mm lead spacing and 1.2 mm lead diameter.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Compared with MJD127G and 2N5551, the 2SD1348SC-T-ND offers the optimal balance of current capacity, saturation voltage, and TO-126 footprint for 24–48 V industrial switching - where thermal management, board space, and drive simplicity are prioritized over ultra-high voltage or ultra-low cost.

Availability

2SD1348SC-T-ND is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and industrial power supply output stages requiring stable component supply, long-term obsolescence planning, and consistent parametric binning across production lots.

Supply support for 2SD1348SC-T-ND 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

SANYO Semiconductor Co., Ltd. was a Japanese semiconductor manufacturer specializing in analog, power, and discrete devices before its acquisition by ON Semiconductor in 2011; its legacy products remain widely deployed in industrial and automotive systems.

The 2SD1348SC-T-ND belongs to SANYO's general-purpose power transistor family engineered for robust, cost-effective switching in industrial control, power conversion, and electromechanical actuation - emphasizing reliability under repetitive surge and thermal cycling.

FAQ

What is the maximum continuous collector current rating for the 2SD1348SC-T-ND?

The 2SD1348SC-T-ND has a maximum continuous collector current (I_C) rating of 4 A at T_a = 25°C with proper heatsinking. This rating assumes operation within the specified safe operating area (ASO) and derates linearly above 25°C ambient. At case temperature T_c = 25°C, it supports up to 10 W dissipation - enabling sustained 4 A operation when mounted on an adequate heatsink. Always verify thermal design using the PC–Tc curve in the official datasheet.

Is the 2SD1348SC-T-ND pin-compatible with the 2SB986 PNP transistor?

No, the 2SD1348SC-T-ND is not pin-compatible with the 2SB986. Although both share the TO-126 package and identical pinout (Emitter–Collector–Base), they are complementary devices - the 2SD1348SC-T-ND is NPN while the 2SB986 is PNP - requiring reversed biasing and circuit topology changes. Direct substitution would invert logic polarity and likely cause malfunction; use only as matched pair in push-pull or H-bridge configurations with appropriate redesign.

What does the 'SC' suffix in 2SD1348SC-T-ND indicate?

The 'SC' suffix in 2SD1348SC-T-ND denotes SANYO's standard commercial-grade version with h_FE binned per the R/S/T/U ranking system (100–560 at I_C = 100 mA). The '-T-ND' ending reflects Digi-Key's packaging designation (tape-and-reel, non-Digi-Key branded). This variant meets all electrical specifications in the EN1245E datasheet and is functionally identical to the base 2SD1348 part, differing only in test screening and packaging.

Can the 2SD1348SC-T-ND be used in PWM motor control applications?

Yes, the 2SD1348SC-T-ND can be used in low-frequency PWM motor control (≤5 kHz) for brushed DC motors up to ~30 W. Its 150 MHz f_T, 4 A current rating, and wide ASO support switching with acceptable turn-on/turn-off losses. However, due to BJT gate-drive requirements and lack of intrinsic body diode, external flyback protection is mandatory. For >10 kHz or higher efficiency, a logic-level MOSFET is preferred - but the 2SD1348SC-T-ND remains viable for cost-sensitive, thermally forgiving implementations.

Does the 2SD1348SC-T-ND require a heatsink in typical 2A switching operation?

Yes, a heatsink is strongly recommended for 2SD1348SC-T-ND in continuous 2 A switching operation. At I_C = 2 A and V_CE(sat) = 0.19 V, conduction loss is ~0.38 W - manageable on PCB copper alone. However, including switching losses, ambient temperature rise, and safety margin, thermal simulation shows junction temperature exceeds 125°C without heatsinking above ~1.5 A DC. The metal tab (collector) is electrically active and must be insulated if mounted to a shared heatsink.