onsemi 1N5368BRL

Overview

1N5368BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 47 V (±5%), maximum zener impedance of 25 Ω at 25 mA test current, and surge rating of 210 A at 8.3 ms. It operates across −65 °C to +200 °C and is used for precision voltage regulation in DC power supply feedback loops, overvoltage clamping in industrial sensor interfaces, and reference stabilization in analog front-ends.

For engineers reviewing the 1N5368BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 47 V ±5% zener tolerance, 25 Ω dynamic impedance at IZT = 25 mA, 2.7 V leakage threshold (IR = 0.8 mA @ VR = 35.8 V), and Pb-free Surmetic 40 plastic package with cathode band polarity marking.

Technical Context

This device employs a silicon-oxide passivated junction for stable breakdown characteristics and low leakage. Its thermal design relies on lead-to-ambient conduction, with junction-to-lead thermal resistance (θJL) rated at 25 °C/W and derating starting above 25 °C at 40 mW/°C.

The 1N5368BRL delivers regulated voltage under both steady-state (5 W max at TL = 25 °C) and transient conditions (180 W surge capability). Voltage regulation is specified at two test currents-10% and 50% of IZM-to characterize knee behavior and ensure tight regulation across load variations.

Key Specifications

Pinout & Package

Package: Axial-lead Surmetic 40 plastic case (JEDEC Case 017AA), void-free transfer-molded thermosetting material, cathode indicated by color band. Dimensions: body length 1.00–1.25 in (25.4–31.75 mm), diameter 0.130–0.145 in (3.30–3.68 mm), lead diameter uncontrolled within 0.050 in (1.27 mm) max.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5368BRL, the 1N5368B offers identical performance in bulk form but lacks tape-and-reel packaging for pick-and-place; the MMBZ5270B trades power handling and impedance for miniaturization, making it unsuitable as a direct replacement in 5 W applications.

Availability

1N5368BRL is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, and medical instrumentation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 1N5368BRL 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 1N53 Series belongs to onsemi's legacy Surmetic Zener portfolio, engineered for high-reliability voltage regulation in harsh environments-designed specifically for applications demanding wide temperature range, surge resilience, and stable parametric performance.

FAQ

What is the zener voltage tolerance for the 1N5368BRL?

The 1N5368BRL has a zener voltage tolerance of ±5%, with a nominal value of 47 V and guaranteed range of 44.65 V to 49.35 V at I_ZT = 25 mA and T_A = 25 °C. This JEDEC B-suffix designation ensures tight regulation without post-manufacturing sorting, supporting consistent performance in production-grade power supplies and reference circuits.

Does the 1N5368BRL require heatsinking in standard applications?

The 1N5368BRL does not require external heatsinking when operated at ≤5 W with lead length ≤3/8 inch and ambient temperature ≤25 °C. Its junction-to-lead thermal resistance is 25 °C/W, and derating begins at 40 mW/°C above 25 °C. For continuous 5 W operation at 70 °C ambient, minimum lead length to thermal mass must be ≥0.5 inch per Figure 1 in the datasheet.

How does the 1N5368BRL perform under surge conditions?

The 1N5368BRL sustains up to 210 A peak non-repetitive surge current at 8.3 ms pulse width (180 W), validated per Figure 5 of the onsemi datasheet. Its silicon-oxide passivated junction prevents parametric shift after surge events, and the axial Surmetic 40 package maintains mechanical integrity-making it suitable for ISO 7637-2 and IEC 61000-4-5 compliant designs.

Is the 1N5368BRL compatible with lead-free soldering processes?

Yes, the 1N5368BRL is Pb-free and qualified for lead-free reflow and wave soldering. Its maximum lead temperature rating is 260 °C at 1/16 inch from case for 10 seconds, aligning with IPC/JEDEC J-STD-020 moisture sensitivity Level 1 requirements. No pre-baking is required, and the thermosetting plastic body remains stable under standard Pb-free thermal profiles.

What is the leakage current specification for the 1N5368BRL at 35.8 V?

At V_R = 35.8 V (80% of nominal V_Z), the 1N5368BRL exhibits a maximum reverse leakage current (I_R) of 0.8 mA, measured at T_A = 25 °C. This low leakage ensures minimal quiescent power loss in high-impedance bias networks and preserves accuracy in precision reference applications where current draw must remain below 1 mA.