My Inquiry
My Account
Renesas RD6.8ES-T2-AZ
- Part No.:
- RD6.8ES-T2-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD6.8ES-T2-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD6.8ES-T2-AZ from Excel Semiconductor is a DO-34 glass-sealed Zener diode with nominal zener voltage 6.8 V, dynamic impedance ≤25 Ω at 5 mA, and maximum power dissipation of 400 mW. It operates within -65 °C to +175 °C junction temperature range and serves as a precision voltage reference in low-power regulator and waveform clipping circuits.
For engineers reviewing the RD6.8ES-T2-AZ datasheet, RD6.8ES-T2-AZ pinout, RD6.8ES-T2-AZ application, or RD6.8ES-T2-AZ equivalent, key selection criteria include its E24-standardized VZ, low knee impedance (≤150 Ω at 0.5 mA), 2 μA reverse leakage at 3.5 V, and surge reverse power rating of 100 W for transient suppression.
Technical Context
This Zener diode uses planar process technology to ensure stable breakdown characteristics and tight VZ tolerance across production lots. Its DO-34 glass package enables axial lead insertion at 5 mm pitch and supports reliable thermal transfer in PCB-mounted applications.
The device exhibits a typical zener voltage temperature coefficient near zero crossing around 6–7 V, confirmed by Figure 9 in the datasheet. Its low Zzt (25 Ω max) and Zzk (150 Ω max) support stable regulation under varying load currents from 0.5 mA to 5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.66–7.01 V at IZ = 5 mA - ensures ±2.5% tolerance for precision biasing |
| Dynamic Impedance (Zzt) | ≤25 Ω at IZ = 5 mA - minimizes output voltage variation under load changes |
| Knee Dynamic Impedance (Zzk) | ≤150 Ω at IZ = 0.5 mA - maintains regulation integrity at low current startup |
| Reverse Current (IR) | ≤2 μA at VR = 3.5 V - guarantees low standby power loss in voltage-sense paths |
| Power Dissipation (PV) | 400 mW at TA = 25 °C - supports continuous operation in compact board layouts |
| Surge Reverse Power (PRSM) | 100 W (non-repetitive) - absorbs short-duration transients without failure |
| Junction Temperature (Tj) | -65 °C to +175 °C - enables use in automotive under-hood and industrial control environments |
Pinout & Package
RD6.8ES-T2-AZ is housed in a standard JEDEC DO-34 glass axial package with cathode identified by a band. Leads are tinned copper, compatible with wave and reflow soldering per manufacturer guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in shunt regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Provides stable 6.8 V reference relative to anode; marked with band on glass body |
Key Features
| Feature | Design Value |
|---|---|
| E24-standardized VZ | Ensures interchangeability with industry-standard 6.8 V Zener references across multiple suppliers |
| DO-34 glass seal | Provides hermetic reliability and long-term stability in humid or high-bias stress environments |
| Planar process construction | Delivers consistent Zener knee behavior and low parameter drift over temperature and lifetime |
| 5 mm lead pitch compatibility | Enables high-density manual or automated insertion into legacy and space-constrained PCBs |
Applications
| Low-Voltage Reference Supply | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Providing stable 6.8 V bias to op-amp input stages or ADC reference dividers in battery-powered sensors. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining accuracy despite supply ripple or load variation. Use Value: Enables <±1% analog measurement accuracy using only passive components and this single diode. |
Use Scenario: Protecting 5 V-tolerant GPIO pins from accidental 12 V miswiring or ESD-induced spikes. IC Role / Device Role / Timing Role: Fast-acting clamping element diverting excess energy to ground before IC damage occurs. Use Value: Limits pin voltage to ≤7.01 V during fault events, staying below absolute maximum ratings of common MCU I/O cells. |
| Waveform Clipper in Signal Conditioning | Surge Absorber in Industrial Sensor Interface |
Use Scenario: Limiting AC audio signal peaks to ±6.8 V in analog front-end preamplifiers. IC Role / Device Role / Timing Role: Bidirectional clipping diode pair (with second diode) shaping signal amplitude without distortion. Use Value: Achieves clean hard-clipping at precisely defined thresholds, avoiding soft saturation artifacts from active devices. |
Use Scenario: Suppressing 1 kV/μs fast transients induced on 4–20 mA loop wiring in factory automation systems. IC Role / Device Role / Timing Role: Primary transient voltage suppression element absorbing up to 100 W surge energy. Use Value: Withstands repetitive surges per IEC 61000-4-5 Level 3 without parameter shift or catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | VZ = 5.6 V ±5%, Zzt = 9 Ω @ 45 mA, DO-41 package (larger footprint) | Lower voltage rating and higher test current; less suitable for low-current biasing | Prefer RD6.8ES-T2-AZ where 6.8 V matching and sub-5 mA operation are required |
| BZX55C6V8 | VZ = 6.8 V ±5%, Zzt = 35 Ω @ 5 mA, DO-35 glass package (same size but different lead finish) | Slightly higher dynamic impedance; no specified surge power rating | RD6.8ES-T2-AZ offers superior surge robustness (100 W vs unlisted) and tighter Zzk for low-current stability |
Compared with 1N4734A and BZX55C6V8, RD6.8ES-T2-AZ delivers tighter VZ tolerance, lower knee impedance, and a documented 100 W surge rating-making it preferred for precision low-power references and transient-prone industrial interfaces.
Availability
RD6.8ES-T2-AZ is available at Aetrix Electronics and suitable for low-voltage reference supplies, overvoltage clamping circuits, waveform clipping stages, and surge absorption nodes requiring stable component supply and long-lifecycle support.
Supply support for RD6.8ES-T2-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
Excel Semiconductor is a China-based analog semiconductor supplier specializing in discrete protection and reference devices, with focus on cost-effective, high-reliability solutions for industrial and consumer markets.
RD6.8ES-T2-AZ belongs to the RD2.0ES–RD39ES Zener diode family designed for general-purpose voltage regulation, clamping, and transient suppression in space-constrained, thermally demanding applications.
FAQ
What is the exact zener voltage range for RD6.8ES-T2-AZ at 5 mA test current?
The RD6.8ES-T2-AZ has a guaranteed zener voltage range of 6.66 V to 7.01 V when measured at IZ = 5 mA and Tj = 25 °C, per the "C" suffix row in the Electrical Characteristics table on page 3 of the datasheet. This 5.2% total span reflects E24-series standardization and ensures compatibility with legacy 6.8 V design requirements.
Does RD6.8ES-T2-AZ have a specified surge reverse power rating, and under what conditions?
Yes, RD6.8ES-T2-AZ is rated for 100 W non-repetitive surge reverse power (PRSM), defined in the Absolute Maximum Ratings table on page 1. This rating applies to single pulses with duration ≤1 ms and duty cycle ≤0.01%, validated per JEDEC test methods and shown in Figure 10 of the datasheet.
What is the reverse leakage current of RD6.8ES-T2-AZ at 3.5 V, and why does that matter?
The RD6.8ES-T2-AZ exhibits ≤2 μA reverse current (IR) at VR = 3.5 V, specified in the Electrical Characteristics table. This low leakage ensures minimal quiescent current draw in always-on bias networks and prevents unintended loading of high-impedance sensor outputs or reference dividers.
Is RD6.8ES-T2-AZ compatible with automated PCB assembly processes?
Yes, RD6.8ES-T2-AZ uses tinned copper leads in a DO-34 axial package conforming to JEDEC standards. Its 29 mm overall length and 2.7 mm body diameter support standard wave soldering and selective reflow profiles. Lead spacing (5 mm pitch) aligns with common pick-and-place feeder specifications.
How does the dynamic impedance of RD6.8ES-T2-AZ compare to similar 6.8 V Zeners, and what is its impact?
RD6.8ES-T2-AZ specifies Zzt ≤25 Ω at 5 mA - significantly lower than many DO-34 alternatives (e.g., BZX55C6V8 at 35 Ω). This lower impedance yields tighter regulation: a 1 mA load change causes <25 mV output shift, critical for stable ADC references and low-drift analog circuits.
RD6.8ES-T2-AZ 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:
- -
RD6.8ES-T2-AZ FAQ
1.How can I place an order for RD6.8ES-T2-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD6.8ES-T2-AZ 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 RD6.8ES-T2-AZ reliable?
The price and inventory of RD6.8ES-T2-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD6.8ES-T2-AZ is usually 5 days.
3.What payment methods are accepted for RD6.8ES-T2-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD6.8ES-T2-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD6.8ES-T2-AZ?
RD6.8ES-T2-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD6.8ES-T2-AZ 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 RD6.8ES-T2-AZ?
For technical support, including RD6.8ES-T2-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD6.8ES-T2-AZ requirements.
6.How does Aetrix verify that RD6.8ES-T2-AZ is sourced from the original manufacturer or authorized distributors?
All RD6.8ES-T2-AZ 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 RD6.8ES-T2-AZ meets industry standards.
7.What is the process for return or replacement of RD6.8ES-T2-AZ?
All RD6.8ES-T2-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD6.8ES-T2-AZ, 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 RD6.8ES-T2-AZ part is unused and in its original packaging.
Return procedure for RD6.8ES-T2-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD6.8ES-T2-AZ Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
