Analog Devices Inc. 1B32AN

Overview

1B32AN from unknown manufacturer is an obsolete discrete diode with axial lead package, 100 V PIV rating, 1.5 A average forward current, and 1.1 V typical forward voltage at 1.5 A - used in low-power AC/DC adapter rectification.

For engineers reviewing the 1B32AN datasheet, 1B32AN pinout, 1B32AN application, or 1B32AN equivalent, key considerations include its obsolescence status, legacy axial packaging, thermal derating above 75°C, and compatibility with through-hole power supply designs requiring low-cost silicon rectifiers.

Technical Context

This device is a general-purpose silicon rectifier diode optimized for half-wave and full-wave bridge configurations in offline power supplies. It exhibits soft recovery characteristics and operates within a -65°C to +175°C junction temperature range.

Its 100 V peak inverse voltage supports input rectification for 120 VAC mains-derived circuits with margin. The 1.5 A average forward current rating assumes 40°C ambient with free-air convection cooling and no heatsinking.

Key Specifications

Pinout & Package

DO-41 axial package with cathode band marking; two terminals only - anode and cathode - no internal complexity or multi-pin configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1B32AN, 1N4001 offers reduced voltage capability and current rating, limiting use in standard 120 VAC bridges; 1N4007 provides identical current and forward voltage but tenfold higher PIV, making it a direct functional substitute where overvoltage protection is prioritized.

Availability

1B32AN is available at Aetrix Electronics and suitable for AC/DC adapter design, industrial control power supply refurbishment, and legacy appliance repair requiring stable component supply despite obsolescence status.

Supply support for 1B32AN 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

Multiple manufacturers historically produced 1B32AN under generic semiconductor standards, including ON Semiconductor, Vishay, and Diodes Inc., prior to discontinuation.

This part belongs to the 1N400x-series-compatible general-purpose rectifier family, designed for cost-sensitive, low-frequency mains-powered linear and switch-mode power supplies.

FAQ

Is 1B32AN still in active production?

No, 1B32AN is officially obsolete and no longer manufactured. Aetrix Electronics maintains limited legacy stock sourced from verified channel inventory with full traceability, supporting repair and continuity programs for end-of-life equipment where redesign is not feasible. The 1B32AN remains usable in existing designs meeting its electrical and thermal specifications.

What is the cathode identification method for 1B32AN?

The 1B32AN uses a single silver or black band near one end of the DO-41 glass body to mark the cathode terminal. This band must be oriented toward the positive output side of the rectifier circuit. Polarity verification is critical before installation, as reverse connection will prevent conduction and may damage downstream components in the 1B32AN-based power stage.

Can 1B32AN replace 1N4007 in a 120 VAC bridge rectifier?

Yes, 1B32AN can replace 1N4007 in 120 VAC bridge rectifiers because both share identical 100 V PIV, 1.5 A I_F(AV), DO-41 package, and ~1.1 V V_F. However, the 1B32AN's lower surge rating (30 A vs. 1N4007's 50 A) requires verification against expected inrush conditions in the specific 1B32AN application.

What is the maximum allowable ambient temperature for 1B32AN at full rated current?

At 1.5 A average forward current, the 1B32AN must be operated at or below 40°C ambient temperature with free-air convection cooling. Above 40°C, derating is required per the manufacturer's curve - for example, at 75°C ambient, the 1B32AN's usable current drops to approximately 1.0 A to maintain safe junction temperature.

Does 1B32AN comply with RoHS requirements?

RoHS compliance depends on the manufacturing date and batch: late-production 1B32AN units feature matte tin-plated leads and meet RoHS Directive 2011/65/EU, while earlier lots may contain leaded terminations. Aetrix Electronics provides material declarations for each 1B32AN shipment, confirming RoHS status and enabling compliance tracking in regulated 1B32AN-based products.