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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Renesas RD2.7ES-T1

Name: RD2.7ES-T1
Brand: Renesas
SKU: RD2.7ES-T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RD2.7ES-T1

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: RD2.7ES-T1.pdf

Description:: DIODE ZENER

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Inventory:46,000

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Product details

Overview

RD2.7ES-T1 from Renesas Electronics is a 2.7 V, ±5% tolerance zener diode in DO-34 glass package with 400 mW power dissipation, DHD (Double Heatsink Diode) construction, and 110 mA maximum zener test current - used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the RD2.7ES-T1 datasheet, RD2.7ES-T1 pinout, RD2.7ES-T1 application, or RD2.7ES-T1 equivalent, this page delivers verified electrical specs, thermal performance data, JEDEC-compliant DO-34 mechanical dimensions, and real-world use cases for constant-voltage regulation and surge suppression.

Technical Context

This planar-processed zener diode operates in reverse breakdown with tightly controlled knee characteristics: dynamic impedance of 100 Ω at 5 mA and 5 Ω at 110 mA, enabling stable regulation across varying load currents. Its DHD construction improves thermal resistance to 375°C/W (junction-to-ambient, no PCB copper).

The device meets E24 standard zener voltage grading, exhibits a negative temperature coefficient of –0.04 %/°C at 2.7 V, and supports non-repetitive 100 W surge power for 10 µs - critical for transient clamping in signal conditioning paths.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.54–2.75 V at I_Z = 5 mA - ensures stable 2.7 V reference within ±4.1% tolerance under nominal bias.
Power Dissipation (P)	400 mW at T_A = 25°C - defines maximum continuous DC power handling before thermal derating begins.
Dynamic Impedance (Z_Z)	100 Ω at I_Z = 5 mA - indicates voltage regulation stiffness near knee; lower than higher-voltage variants in same series.
Surge Reverse Power (P_RSM)	100 W for t = 10 µs - enables robust transient suppression without device failure during short-duration overvoltage events.
Junction Temperature (T_j)	175°C maximum - allows operation in high-ambient industrial environments when mounted on minimal copper area.
Reverse Current (I_R)	≤100 µA at V_R = 0.5 V - confirms low leakage in standby mode, preserving battery life in always-on sensor nodes.
Package	DO-34 (JEDEC) - 2.4 mm max body length, axial leads, glass-sealed, compatible with 5 mm pitch PCB insertion.

Pinout & Package

DO-34 glass package: axial-leaded, hermetically sealed, cathode indicated by black band. Body diameter φ1.8–2.0 mm, overall length ≤4.5 mm, lead diameter 0.4–0.5 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower-potential node; establishes reference point for zener voltage drop.
Cathode	Reverse-biased breakdown terminal / Output reference node	Provides stable 2.7 V above anode potential when reverse biased; marked with black band on DO-34 body.

Key Features

Feature	Design Value
DHD (Double Heatsink Diode) construction	Reduces thermal resistance by enabling heat conduction through both leads - critical for reliability in compact, unventilated enclosures.
Planar process technology	Ensures tight parameter distribution and long-term stability of V_Z and Z_Z across temperature and lifetime.
E24-standard zener voltage grading	Supports standardized BOM selection and interchangeability with other E24-compliant 2.7 V zeners in cost-sensitive designs.
DO-34 glass-sealed package	Enables manual or wave-solder assembly with 5 mm pitch compatibility - reduces PCB routing complexity vs. surface-mount alternatives.

Applications

Low-Voltage Reference Supply	Signal-Level Clipping Circuit
Use Scenario: Providing stable 2.7 V bias for op-amp input stages in battery-powered instrumentation. IC Role / Device Role / Timing Role: Zener reference diode establishing precise DC offset and common-mode voltage. Use Value: Maintains <±1% output drift over –40°C to +85°C due to predictable negative tempco and low Z_Z.	Use Scenario: Limiting analog sensor output swing to protect ADC input from overvoltage. IC Role / Device Role / Timing Role: Bidirectional clipping element (with series resistor) constraining signal peaks to ±2.7 V. Use Value: Fast response (<1 ns) to transients and low knee current (5 mA) enable clean waveform shaping without loading source.
Surge Protection Node	Constant-Current Bias Generator
Use Scenario: Absorbing ESD and line surges on RS-232 or CAN bus termination points. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between signal line and ground. Use Value: Withstands 100 W/10 µs surges per Fig. 10 while maintaining sub-µA leakage below 0.5 V - prevents false triggering.	Use Scenario: Generating fixed 110 mA bias current for LED driver or photodiode amplifier. IC Role / Device Role / Timing Role: Current-regulating element using zener voltage and series resistor (R = V_Z/I). Use Value: Stable 2.7 V reference enables ±2% current accuracy across supply variations, leveraging 110 mA I_Z(max) rating.

Low-Voltage Reference Supply

Signal-Level Clipping Circuit

Use Scenario: Providing stable 2.7 V bias for op-amp input stages in battery-powered instrumentation.

IC Role / Device Role / Timing Role: Zener reference diode establishing precise DC offset and common-mode voltage.

Use Value: Maintains <±1% output drift over –40°C to +85°C due to predictable negative tempco and low Z_Z.

Use Scenario: Limiting analog sensor output swing to protect ADC input from overvoltage.

IC Role / Device Role / Timing Role: Bidirectional clipping element (with series resistor) constraining signal peaks to ±2.7 V.

Use Value: Fast response (<1 ns) to transients and low knee current (5 mA) enable clean waveform shaping without loading source.

Surge Protection Node

Constant-Current Bias Generator

Use Scenario: Absorbing ESD and line surges on RS-232 or CAN bus termination points.

IC Role / Device Role / Timing Role: Transient voltage suppressor placed between signal line and ground.

Use Value: Withstands 100 W/10 µs surges per Fig. 10 while maintaining sub-µA leakage below 0.5 V - prevents false triggering.

Use Scenario: Generating fixed 110 mA bias current for LED driver or photodiode amplifier.

IC Role / Device Role / Timing Role: Current-regulating element using zener voltage and series resistor (R = V_Z/I).

Use Value: Stable 2.7 V reference enables ±2% current accuracy across supply variations, leveraging 110 mA I_Z(max) rating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4732A	2.7 V, 1 W rating, DO-41 package, 1000 mA I_Z, Z_Z = 14 Ω at 76 mA	Higher power handling but larger footprint; less suitable for space-constrained PCBs with 5 mm pitch constraints	Choose when >400 mW continuous dissipation or lower dynamic impedance is required; requires layout change for DO-41.
BZX55C2V7	2.7 V, 500 mW rating, DO-35 package, Z_Z = 100 Ω at 5 mA, same DO-series mechanical compatibility	Near-identical electrical specs but slightly higher P_D; DO-35 has 2.5 mm body vs. DO-34's 2.4 mm - minor fit difference	Acceptable substitute where DO-35 footprint is available; verify lead spacing and thermal pad clearance match.

Compared with 1N4732A and BZX55C2V7, RD2.7ES-T1 offers optimized thermal performance in ultra-compact DO-34 form factor, making it preferred for high-density analog boards where board space and thermal management are co-constrained.

Availability

RD2.7ES-T1 is available at Aetrix Electronics and suitable for low-power voltage reference, signal clamping, surge absorption, and constant-current bias applications requiring stable component supply and long-lifecycle support.

Supply support for RD2.7ES-T1 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 formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.

RD2.7ES-T1 belongs to the legacy RDx.xES zener diode family originally developed by NEC for industrial-grade, glass-encapsulated precision voltage regulation - targeting cost-sensitive, high-reliability analog subsystems.

FAQ

What is the exact zener voltage tolerance of RD2.7ES-T1?

The RD2.7ES-T1 has a guaranteed zener voltage range of 2.54 V to 2.75 V at I_Z = 5 mA, corresponding to ±4.1% tolerance around the nominal 2.7 V rating. This complies with E24 standard grading and is confirmed in the D13935EJ7V0DS datasheet Table on page 3.

Does RD2.7ES-T1 support surge protection applications?

Yes, RD2.7ES-T1 supports non-repetitive surge suppression with a rated 100 W surge reverse power for 10 µs pulses (per Fig. 10). Its DHD construction and 175°C junction rating allow reliable clamping in transient-prone interfaces like sensor inputs or communication lines.

What is the thermal resistance of RD2.7ES-T1 in free air?

The RD2.7ES-T1 has a junction-to-ambient thermal resistance of 375°C/W in free air (no PCB copper), as shown in Fig. 11 transient thermal impedance curve. Derating begins above 25°C ambient per Fig. 6, reaching zero power at 125°C.

Is RD2.7ES-T1 RoHS compliant?

RD2.7ES-T1 was manufactured prior to full RoHS enforcement and uses leaded glass encapsulation. It is classified as "Standard" grade per Renesas documentation and intended for industrial/commercial applications - confirm compliance status with current Renesas product change notices for new production lots.

Can RD2.7ES-T1 be used as a low-voltage reference in precision ADC circuits?

RD2.7ES-T1 provides adequate stability for moderate-precision applications: its –0.04 %/°C temperature coefficient and 100 Ω dynamic impedance at 5 mA yield ~±0.5% total error over 0°C–70°C. For 12-bit+ systems, consider buffered reference ICs instead.

RD2.7ES-T1 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: -

Tolerance:: -

Power - Max:: -

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: -

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

RD2.7ES-T1 FAQ

1.How can I place an order for RD2.7ES-T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for RD2.7ES-T1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for RD2.7ES-T1 reliable?

The price and inventory of RD2.7ES-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD2.7ES-T1 is usually 5 days.

3.What payment methods are accepted for RD2.7ES-T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD2.7ES-T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RD2.7ES-T1?

RD2.7ES-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RD2.7ES-T1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for RD2.7ES-T1?

For technical support, including RD2.7ES-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD2.7ES-T1 requirements.

6.How does Aetrix verify that RD2.7ES-T1 is sourced from the original manufacturer or authorized distributors?

All RD2.7ES-T1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RD2.7ES-T1 meets industry standards.

7.What is the process for return or replacement of RD2.7ES-T1?

All RD2.7ES-T1 units undergo pre-shipment inspection (PSI). If there is an issue with RD2.7ES-T1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The RD2.7ES-T1 part is unused and in its original packaging.

Return procedure for RD2.7ES-T1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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