1N4743CPE3/TR12

Overview

The Microchip Technology 1N4743CPE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, manufactured by the Scottsdale Division. It provides voltage regulation at a nominal Zener voltage of 13 V with a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates within an ambient temperature range of -65°C to +150°C and features a plastic DO-41 (DO-204AL) axial-lead package. Electrical characteristics include a test current of 19 mA, a maximum dynamic impedance of 10 Ω, and a maximum reverse current of 5 μA. The component is RoHS compliant, moisture classified as Level 1, and supplied in tape and reel packaging.

Feature Summary

• Provides precise voltage regulation with a standard ±2% tolerance on nominal Zener voltage
• Features flexible axial-lead mounting terminals for standard through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage sources in electronic circuits
• Protection against voltage transients and spikes

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'P' indicates plastic construction, 'e3' confirms RoHS compliance, and 'TR12' denotes tape and reel packaging. Confirm the 'C' suffix corresponds to the necessary ±2% voltage tolerance. Ensure the manufacturer source is identified as Microsemi or its successor entity, as part numbers may vary across corporate transitions. Cross-reference datasheet revisions to ensure compatibility with current manufacturing standards.

Selection Notes

Select this component when a 13 V reference requires tighter accuracy than the standard ±5% or ±10% options available in the same series. The plastic DO-41 package offers lower thermal resistance compared to glass-body alternatives. Consider the 1.0 W power dissipation rating and derating curves for high-temperature environments. Verify that the ±2% tolerance meets the specific circuit requirements without necessitating more expensive military screening prefixes.

Part Context

This device belongs to the extensive 1N4728A through 1N4764A series of silicon Zener diodes. The series covers a wide voltage selection from 3.3 V to 100 V. The 'C' suffix specifically identifies the tighter 2% tolerance variant, distinct from the standard 'A' suffix (5%) or no-suffix (10%) versions. The 'P' suffix designates the plastic encapsulated version, which provides improved thermal performance over the glass-body 'G' suffix option.

Replacement Considerations

Equivalent parts within the same series include 1N4743A (±5% tolerance) or 1N4743D (±1% tolerance). Surface mount equivalents are available as SMAJ4743A or MLL4743A. Military screening levels can be obtained by adding prefixes such as MQ, MX, MV, or MSP to the base part number.