STMicroelectronics 2N5154S1

Overview

2N5154S1 from STMicroelectronics is a radiation-hardened NPN bipolar junction transistor qualified to ESCC 5203/010 for space-grade operation, featuring V_CEO = 80 V, I_C(max) = 5 A, h_FE ≥ 70 at 5 V / 2.5 A, and operation from –65 °C to +200 °C in hermetic SMD.5 packaging with emitter on pin 1 - used in satellite power supplies and radiation-tolerant linear bias circuits.

For engineers reviewing the 2N5154S1 datasheet, 2N5154S1 pinout, 2N5154S1 application, or 2N5154S1 equivalent, this page delivers verified radiation hardness data (100 krad(Si) LDR), thermal resistance (R_thj-case = 5 °C/W), TO-257/SMD.5 package mapping, and ESCC flight-model traceability requirements.

Technical Context

This device is a high-reliability, low-dose-rate radiation-hardened NPN transistor designed for continuous operation under total ionizing dose (TID) exposure up to 100 krad(Si). Its hermetic SMD.5 package isolates the lid from all terminals and positions emitter on pin 1 per ESCC 5203/010/06 compliance.

Electrical behavior is characterized across –65 °C to +200 °C, with guaranteed V_CE(sat) ≤ 1.5 V at I_C = 5 A / I_B = 0.5 A and h_FE ≥ 40 at 5 A / 5 V - enabling stable gain and saturation performance in hardened linear regulators and battery-switching stages.

Key Specifications

Pinout & Package

SMD.5 hermetic surface-mount package: 3-terminal ceramic-metal sealed housing with gold-plated leads; lid electrically isolated from all pins; weight = 1 g; footprint compatible with automated placement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar radiation-hardened NPN transistor applications.

Compared with 2N5154S1, 2N5154RSHRG adds verified 100 krad LDR performance with full RVT reporting, while 2N5154SHRG offers identical form-fit-function without radiation assurance - enabling tiered selection across prototype, qualification, and flight hardware.

Availability

2N5154S1 is available at Aetrix Electronics and suitable for spacecraft power distribution, satellite battery switching, and rad-hard linear bias supply designs requiring stable component supply with full ESCC documentation and traceable sourcing.

Supply support for 2N5154S1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering automotive, industrial, and aerospace-grade ICs with emphasis on reliability, radiation tolerance, and long-term product continuity.

The 2N5154HR family is part of ST's space-grade bipolar transistor product line, engineered specifically for ESCC-qualified applications demanding immunity to total ionizing dose and operation across extreme thermal environments.

FAQ

What is the pin configuration for 2N5154S1?

2N5154S1 uses the SMD.5 hermetic package with emitter on pin 1, base on pin 2, and collector on pin 3. The lid is electrically isolated from all terminals. This pinout is defined in ESCC 5203/010/06 and confirmed in Table 6 of DS6100 Rev 14.

Is 2N5154S1 qualified for low-dose-rate radiation environments?

No - 2N5154S1 is an engineering model (EM) with ESCC 5203/010 qualification but no documented low-dose-rate radiation testing. For LDR compliance, select 2N5154RSHRG or 2N5154RESYHRG, both tested to 100 krad(Si) at 0.1 rad(Si)/s per ESCC 22900.

What thermal interface is recommended for 2N5154S1 in SMD.5 package?

A thermally conductive adhesive or solder-based interface directly to a copper heatsink is recommended. With R_thj-case = 5 °C/W, the device supports 35 W dissipation at T_case = 25 °C; avoid thermal vias through solder mask - use exposed copper pad with minimum 10 mm² area beneath the package base.

Does 2N5154S1 include radiation test reports in its shipment documentation?

No - as an engineering model, 2N5154S1 ships with a Certificate of Conformance per Table 8 of DS6100, but no Radiation Verification Test (RVT) report. Flight models like 2N5154RSHRG include RVT data at 25/50/70/100 krad for full ESCC compliance traceability.