Renesas RD6.2F-AZ

Overview

RD6.2F-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode in DO-41 glass-sealed package, with nominal zener voltage 6.2 V (B grade, min 6.17 V / max 6.52 V), dynamic impedance 6 Ω at 40 mA, and temperature coefficient +2.0 mV/°C. It serves as a precision voltage reference and overvoltage clamp in power supply regulation circuits.

For engineers reviewing the RD6.2F-AZ datasheet, RD6.2F-AZ pinout, RD6.2F-AZ application, or RD6.2F-AZ equivalent, this part is selected for stable low-voltage reference, surge suppression in industrial control I/O stages, and waveform limiting in analog signal conditioning-where ±5% zener tolerance, 175°C junction rating, and DO-41 thermal performance are critical.

Technical Context

The RD6.2F-AZ operates as a reverse-biased voltage-regulating diode with sharp knee characteristics at 40 mA test current. Its planar DHD (Double Heatsink Diode) structure enables 1 W continuous power dissipation at 25°C ambient and supports transient surge handling up to 400 W for 10 μs pulses.

It exhibits a positive zener voltage temperature coefficient (+2.0 mV/°C), indicating increasing Vz with rising junction temperature-critical for thermal drift compensation in reference designs. The device complies with JEDEC DO-41 mechanical outline and meets Renesas "Standard" quality grade for industrial and office equipment applications.

Key Specifications

Pinout & Package

RD6.2F-AZ uses a standard DO-41 axial-leaded glass package (JEDEC compliant), with cathode indicated by a black band. Leads are tinned copper-clad steel; body diameter 2.5 mm max, length 5.0 mm max, lead spacing 25 mm min.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4735A and BZX55-C6V2, RD6.2F-AZ delivers superior surge immunity (400 W vs. uncharacterized), tighter thermal coefficient control (+2.0 mV/°C vs. typical ±3 mV/°C), and guaranteed 1 W operation in DO-41-making it optimal for ruggedized industrial power and protection stages.

Availability

RD6.2F-AZ is available at Aetrix Electronics and suitable for industrial power supplies, ESD protection circuits, and analog signal conditioning requiring stable component supply with traceable sourcing and long-lifecycle support.

Supply support for RD6.2F-AZ 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

RD6.2F-AZ belongs to the RD2.0F–RD82F planar zener diode family, designed for standardized voltage reference and transient suppression in cost-sensitive, high-reliability industrial equipment.

FAQ

What is the zener voltage tolerance of RD6.2F-AZ at 40 mA test current?

The RD6.2F-AZ has a zener voltage range of 6.17 V to 6.52 V at 40 mA, corresponding to a ±5.5% tolerance around the nominal 6.2 V rating. This B-grade specification is verified per Renesas datasheet D13936EJ5V0DS and applies under standard 40 ms test conditions. RD6.2F-AZ maintains this tolerance across its rated junction temperature range.

Can RD6.2F-AZ be used in place of a 6.2 V zener diode with DO-35 package?

No-RD6.2F-AZ uses a DO-41 package (larger body, longer leads, higher thermal mass) versus DO-35. While both provide 6.2 V regulation, RD6.2F-AZ supports 1 W continuous dissipation and 400 W surge, whereas DO-35 variants like BZX55-C6V2 are rated for only 500 mW. Substitution requires PCB footprint and thermal design review. RD6.2F-AZ is not a drop-in replacement for DO-35 parts.

What is the maximum allowable reverse current before breakdown in RD6.2F-AZ?

At VR = 4.0 V, the RD6.2F-AZ guarantees reverse current ≤20 μA. This leakage level ensures minimal quiescent power loss in standby modes and preserves accuracy in high-impedance reference nodes. The value is measured at TA = 25°C and remains stable up to Tj = 125°C per Renesas characterization data in Figure 3(a).

Does RD6.2F-AZ meet RoHS requirements?

Yes-RD6.2F-AZ complies with EU RoHS Directive restrictions on hazardous substances. Renesas Electronics confirms environmental compliance in product documentation and provides material declarations upon request. RD6.2F-AZ contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is suitable for environmentally regulated industrial deployments.

How does the +2.0 mV/°C temperature coefficient affect RD6.2F-AZ in a 0–70°C operating range?

With a +2.0 mV/°C coefficient, RD6.2F-AZ's zener voltage increases by 140 mV across a 70°C rise (e.g., from 25°C to 95°C junction). At nominal 6.2 V, this represents +2.26% drift. Designers must account for this in precision references-either via compensation networks or by selecting RD6.2F-AZ only where ±3% total regulation error is acceptable. The coefficient is linear and repeatable per datasheet Figure 4.