onsemi 1N6002B_T50R

Overview

1N6002B_T50R from Fairchild Semiconductor is a 12 V, 5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, designed for precision voltage regulation and reference applications in low-power analog circuits.

For engineers reviewing the 1N6002B_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified Zener voltage (11.4–12.6 V), test current (5 mA), zener impedance (22 Ω @ IZ), leakage current (0.1 mA @ 9.1 V), and thermal operating range (–65 to +200°C) - all critical for stable biasing, overvoltage clamping, and feedback loop referencing.

Technical Context

The 1N6002B_T50R operates as a two-terminal voltage reference device relying on reverse-biased Zener breakdown at precisely controlled doping and junction geometry. Its performance is defined by tight 5% VZ tolerance, low dynamic impedance (22 Ω at 5 mA), and stable leakage (<0.1 mA at 9.1 V VR).

Thermal design requires adherence to lead temperature limits: maximum 75°C at 3/8″ lead length, with linear derating beyond that point. The DO-35 glass package provides hermetic sealing and consistent thermal resistance essential for repeatable Zener voltage stability across industrial temperature extremes.

Key Specifications

Pinout & Package

DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no external biasing - anode and cathode are unidirectional terminals defining polarity-sensitive mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Compared with 1N6002B_T50R, the 1N4742A offers double the power rating but requires layout rework for DO-41, while BZX55-C12 matches the DO-35 form factor and improves sub-threshold regulation - making it a drop-in alternative only if knee impedance matters more than legacy Fairchild qualification.

Availability

1N6002B_T50R is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, and analog biasing applications requiring stable component supply across industrial control, instrumentation, and embedded power management designs.

Supply support for 1N6002B_T50R 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016; its legacy Zener diode portfolio remains widely deployed and supported.

The 1N6002B_T50R belongs to Fairchild's 1N5985B–1N6025B Zener diode family, engineered for high-reliability voltage regulation in cost-sensitive, thermally demanding applications where stability, consistency, and long-term parameter retention are essential.

FAQ

What is the exact Zener voltage range for 1N6002B_T50R at 5 mA test current?

The 1N6002B_T50R has a guaranteed Zener voltage range of 11.4 V (minimum) to 12.6 V (maximum) when measured at 5 mA test current and 25°C ambient temperature, per Fairchild's 1N5985B–1N6025B datasheet Rev. C2. This 5% tolerance window reflects factory binning and is validated during production testing. The typical value is 12.0 V, but design margins must accommodate the full min/max spread. The 1N6002B_T50R maintains this specification across its rated operating temperature range when thermal conditions comply with lead-length and derating rules.

Does 1N6002B_T50R support operation above 125°C junction temperature?

No - the 1N6002B_T50R is rated for a junction and storage temperature range of –65°C to +200°C, but its safe operating area is constrained by power derating: full 500 mW is only allowed at lead temperature ≤75°C, with linear reduction of 4.0 mW/°C above that point. At 125°C lead temperature, allowable power drops to 300 mW. Exceeding derated limits risks parametric shift or premature failure. The 1N6002B_T50R must be mounted with 3/8″ lead length to meet thermal specifications; shorter leads increase thermal resistance and reduce usable power.

Is the DO-35 package of 1N6002B_T50R compatible with automated placement equipment?

Yes - the 1N6002B_T50R uses the standard DO-35 glass axial package with 0.375″ (9.5 mm) body length and 0.022″ (0.56 mm) lead diameter, conforming to EIA-481-D tape-and-reel packaging standards when supplied in carrier tape. Its axial symmetry and consistent lead spacing allow reliable feeding and placement on high-speed pick-and-place machines. However, glass-body fragility requires controlled nozzle vacuum and placement force settings to avoid cracking. The 1N6002B_T50R is commonly supplied in 10,000-piece reels compliant with JEDEC J-STD-020 moisture sensitivity level 1.

How does the leakage current of 1N6002B_T50R compare to other 12 V Zeners at 9.1 V reverse bias?

The 1N6002B_T50R specifies a maximum leakage current of 0.1 mA at 9.1 V reverse bias (VR), matching the performance of peers like 1N4742A and BZX55-C12 under identical test conditions. This low IR ensures minimal standby current draw in always-on monitoring circuits and preserves signal fidelity in high-impedance sensing nodes. Unlike older Zener families with IR up to 1 mA at same VR, the 1N6002B_T50R's leakage is tightly controlled via optimized diffusion profiles - a key reason it's selected for battery-backed systems where quiescent power budget is critical.

Can 1N6002B_T50R be used in place of 1N6001B or 1N6003B without circuit redesign?

Only if the target application tolerates the specific Zener voltage shift: 1N6001B is 11 V nominal (10.45–11.55 V), 1N6002B_T50R is 12 V nominal (11.4–12.6 V), and 1N6003B is 13 V nominal (12.35–13.65 V). All share identical DO-35 package, 500 mW rating, 5 mA test current, and thermal specs - so mechanical and thermal redesign is unnecessary. However, substituting 1N6002B_T50R for 1N6001B raises regulated voltage by ~1 V, which may saturate downstream transistors or exceed IC absolute maximum ratings. Always verify voltage margins before interchange.