onsemi 1N5228BTR_S00Z

Overview

1N5228BTR_S00Z from ON Semiconductor is a 3.9 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation and 20 mA test current, with 23 Ω dynamic impedance and -0.06 %/°C temperature coefficient-used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the 1N5228BTR_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal stability, low leakage (<10 μA at 3.0 V), DO-35 mechanical compatibility, and legacy industrial design continuity under ON Semiconductor's Fairchild integration.

Technical Context

This device operates as a two-terminal silicon Zener diode optimized for stable reverse-breakdown regulation at 3.9 V. It uses planar epitaxial construction with hermetically sealed glass (DO-35) packaging to ensure long-term parameter stability and low noise performance in DC biasing and reference applications.

Its -0.06 %/°C temperature coefficient minimizes drift across -65°C to +200°C junction temperature range, while 23 Ω dynamic impedance at 20 mA supports tight regulation under moderate load variation-making it suitable for feedback networks in LDOs and sensor excitation circuits where low-cost, proven reliability is required.

Key Specifications

Pinout & Package

DO-35 glass package: axial-leaded, hermetically sealed, cathode indicated by color band; total length 4.56 mm, body diameter 1.91 mm, lead diameter 0.46 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5228B (bulk) and BZX55-C3V9 (higher Z_ZK, higher leakage), the 1N5228BTR_S00Z offers tape-and-reel delivery plus superior low-current regulation-critical for battery-powered sensor nodes and reset circuits requiring sub-5 mA operation.

Availability

1N5228BTR_S00Z is available at Aetrix Electronics and suitable for microcontroller reset circuits, low-power sensor biasing, linear regulator feedback networks, and overvoltage clamp protection requiring stable component supply and legacy part continuity.

Supply support for 1N5228BTR_S00Z 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

ON Semiconductor is a global semiconductor manufacturer delivering energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.

The 1N52xxB series belongs to ON Semiconductor's legacy Zener diode product line-designed specifically for general-purpose voltage regulation and protection in cost-sensitive, high-reliability through-hole designs.

FAQ

What is the Zener voltage tolerance of the 1N5228BTR_S00Z?

The 1N5228BTR_S00Z has a Zener voltage tolerance of ±5%, specifying a minimum V_Z of 3.705 V and maximum of 4.095 V at I_Z = 20 mA. This tolerance is guaranteed per ON Semiconductor's 1N5221B–1N5263B datasheet Rev. 3 and enables direct use in applications where tighter regulation is not required-such as reset thresholds or coarse voltage clamping. The 1N5228BTR_S00Z maintains this spec across its full operating temperature range.

Does the 1N5228BTR_S00Z have a specified forward voltage?

Yes-the 1N5228BTR_S00Z has a maximum forward voltage (V_F) of 1.2 V at I_F = 200 mA, as documented in the Absolute Maximum Ratings table of the ON Semiconductor datasheet. While primarily used in reverse-bias Zener mode, this V_F value confirms diode functionality in forward conduction and supports use in polarity-protection or OR-ing configurations where low forward drop matters. The 1N5228BTR_S00Z exhibits typical V_F ~0.85 V at 20 mA.

What is the thermal derating behavior of the 1N5228BTR_S00Z above 50°C?

The 1N5228BTR_S00Z derates linearly at 4.0 mW/°C above 50°C ambient temperature, reducing its maximum allowable power dissipation from 500 mW at 25°C to 400 mW at 75°C. This derating is defined in the Absolute Maximum Ratings table and must be applied when calculating safe operating area in enclosed or high-temperature environments. The 1N5228BTR_S00Z retains full electrical specification compliance down to -65°C and up to +200°C junction temperature.

Is the 1N5228BTR_S00Z RoHS compliant and halogen-free?

Yes-the 1N5228BTR_S00Z meets RoHS Directive 2011/65/EU requirements and is halogen-free per ON Semiconductor's material declarations. Its DO-35 glass package contains no lead in solderable terminations, and all die and passivation materials comply with JEDEC J-STD-609 revision A for marking and classification. Compliance documentation for the 1N5228BTR_S00Z is available via ON Semiconductor's website using the part's full orderable number.

How does the temperature coefficient of the 1N5228BTR_S00Z affect long-term voltage stability?

The 1N5228BTR_S00Z has a temperature coefficient of -0.06 %/°C near its 3.9 V operating point, meaning its Zener voltage decreases by approximately 2.34 mV per °C rise. Over a 50°C ambient shift (e.g., 25°C to 75°C), this yields ~117 mV total drift-well within tolerance for most non-precision references. This predictable, linear drift allows system-level compensation if needed, and the 1N5228BTR_S00Z remains stable over time due to its hermetic DO-35 packaging.