Microchip Technology 1N752A

Overview

1N752A from Microsemi is a 500 mW, 5.6 V ±5% axial-leaded silicon Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTXV level per MIL-PRF-19500/127, with dynamic impedance of 8 Ω at 2.5 mA, reverse current ≤5 µA at 2.5 V, and temperature coefficient of –0.028 / +0.036 %/°C - used for precision voltage regulation in military power supply reference circuits.

For engineers reviewing the 1N752A datasheet, 1N752A pinout, 1N752A application, or 1N752A equivalent, this page delivers verified electrical parameters, military qualification status, thermal derating behavior, DO-35 mechanical dimensions, and RoHS-compliant commercial alternatives - all confirmed from Microsemi T4-LDS-0288 Rev. 1.

Technical Context

The 1N752A operates as a two-terminal voltage reference device, conducting in reverse breakdown at nominal 5.6 V with tightly controlled knee characteristics (IZK = 0.25 mA), enabling stable regulation across –65°C to +175°C ambient. Its metallurgically bonded junction ensures low noise and radiation hardness per MicroNote 050.

It exhibits asymmetric temperature coefficient behavior: negative below 5.6 V and positive above, resulting in near-zero TC at operating point - critical for high-stability analog references. Thermal resistance is 250°C/W junction-to-lead (0.375" lead length) and 300°C/W junction-to-ambient on PCB.

Key Specifications

Pinout & Package

1N752A uses a two-terminal axial-leaded DO-35 (DO-204AH) glass package. Cathode is marked by a colored band; device must be reverse-biased (banded end positive) for Zener operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N752A, the 1N752UR-1 offers identical regulation but in MELF format for SMT lines, while the 1N5232B provides cost-effective DO-35 compatibility without military testing - both require revalidation of thermal and stability margins in the target design.

Availability

1N752A is available at Aetrix Electronics and suitable for avionics power reference, military radio bias supply, and satellite payload sensor interface applications requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1N752A 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

Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and military-qualified analog and mixed-signal components.

The 1N752A belongs to Microsemi's legacy MIL-PRF-19500/127-qualified Zener diode family, designed specifically for precision voltage regulation in defense, aerospace, and critical infrastructure systems where long-term parametric stability and environmental resilience are mandatory.

FAQ

What is the Zener voltage tolerance and test condition for 1N752A?

The 1N752A has a nominal Zener voltage of 5.6 V with ±5% tolerance, measured at IZT = 2.5 mA and 25°C ambient per Microsemi T4-LDS-0288 Rev. 1. This tolerance applies to all JAN, JANTX, and JANTXV versions of the 1N752A, and voltage is stabilized after 20 seconds of dc test current application.

Is 1N752A suitable for surface-mount assembly?

No - the standard 1N752A is supplied in the axial-leaded DO-35 (DO-204AH) glass package. For surface-mount use, Microsemi offers the functionally equivalent 1N752UR-1 in DO-213AA (MELF) package, which shares the same 5.6 V ±5% rating but lacks military qualification and is RoHS compliant only.

What is the maximum power dissipation of 1N752A at 75°C ambient?

At TA = 75°C on an FR4 PCB with 1 oz copper, the 1N752A's maximum rated power is 400 mW, linearly derating from 400 mW at 55°C to zero at 175°C per Figure 2 in T4-LDS-0288. Derating must follow the published curve to avoid junction overheating and parametric shift.

Does 1N752A have radiation hardness certification?

Yes - the 1N752A is inherently radiation hard as documented in Microsemi MicroNote 050. Its metallurgically bonded DO-35 structure provides proven tolerance to total ionizing dose (TID) and displacement damage, making it suitable for low-earth orbit satellite payloads without additional shielding.

How is polarity marked on the 1N752A package?

The cathode of the 1N752A is identified by a visible color band on the glass body. For proper Zener regulation, the banded end must be held at a more positive potential than the anode - i.e., the device is operated in reverse bias with cathode as the regulated output node.