My Inquiry
My Account
Renesas RD6.8JS-T1-AZ
- Part No.:
- RD6.8JS-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD6.8JS-T1-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:66,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD6.8JS-T1-AZ from Renesas Electronics is a 6.8 V, 400 mW DO-34 glass-sealed Zener diode with DHD (Double Heatsink Diode) construction, ±5% zener voltage tolerance at 5 mA test current, 3.5 Ω dynamic impedance, and 2 µA reverse leakage at 5 V, used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the RD6.8JS-T1-AZ datasheet, RD6.8JS-T1-AZ pinout, RD6.8JS-T1-AZ application, or RD6.8JS-T1-AZ equivalent, this page delivers verified electrical specs, thermal performance data, JEDEC DO-34 package details, and real-world use cases for stable reference design and surge suppression.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 6.8 V at IZ = 5 mA, exhibiting low dynamic impedance (3.5 Ω) and tight voltage tolerance (±5%). Its DHD construction enables enhanced thermal dissipation in the compact DO-34 package.
It supports surge reverse power up to 100 W for 10 µs pulses and maintains stable regulation across ambient temperatures from –65°C to +175°C, with junction temperature rated to 175°C and thermal resistance dependent on PCB pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±5% at IZ = 5 mA - defines precise clamping threshold for voltage reference and protection |
| Power Dissipation (P) | 400 mW - maximum steady-state power handling at TA = 25°C, derates linearly above 25°C |
| Dynamic Impedance (ZZ) | 3.5 Ω - low AC impedance ensures minimal voltage variation under load transients |
| Reverse Leakage (IR) | 2 µA at VR = 5 V - guarantees low standby current in high-impedance bias networks |
| Surge Power (PRSM) | 100 W (t = 10 µs) - withstands short-duration ESD or inductive kick events without failure |
| Junction Temperature (Tj) | 175°C - enables operation in thermally demanding industrial environments |
| Package | DO-34 (JEDEC) - axial glass-body package with 5 mm lead pitch, compatible with wave soldering |
Pinout & Package
DO-34 package: axial-leaded, glass-encapsulated, cathode indicated by black band. Body length ≤2.4 mm, diameter φ2.0 mm max, lead spacing 5 mm standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal | Marked with black band; connected to regulated output or voltage reference point |
Key Features
| Feature | Design Value |
|---|---|
| DHD construction | Double heatsink geometry improves thermal transfer from junction to leads, enabling full 400 mW rating in DO-34 |
| Planar process | Ensures consistent breakdown characteristics, low parameter spread, and high reliability across production lots |
| E24-standard voltage | 6.8 V aligns with IEC 60063 E24 series, simplifying BOM consolidation and cross-referencing |
| DO-34 glass seal | Hermetic encapsulation provides long-term stability and moisture resistance without conformal coating |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback paths using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Zener reference element providing stable 6.8 V threshold to control error amplifier bias and loop gain. Use Value: Tight ±5% tolerance and 3.5 Ω ZZ minimize output drift across line/load/temperature, improving overall PSU accuracy to ±1.5%. | Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient overvoltage events exceeding 6.8 V. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that diverts surge current away from sensitive downstream circuitry. Use Value: 100 W surge rating (10 µs) absorbs typical ESD and inductive spikes without degradation, extending system MTBF. |
| Constant Current Source | Waveform Clipper |
Use Scenario: Biasing LED strings or sensor excitation circuits requiring stable current independent of supply variation. IC Role / Device Role / Timing Role: Voltage reference in emitter-degenerated BJT or MOSFET current mirror topologies. Use Value: Low 2 µA leakage at 5 V ensures minimal error in sub-mA current sources, supporting <1% current accuracy. | Use Scenario: Limiting audio signal peaks or digital logic swing to prevent saturation in analog front-ends or level-shifting stages. IC Role / Device Role / Timing Role: Bidirectional clipping element (with series diode) or unidirectional limiter in signal path. Use Value: Sharp knee at 6.8 V and low ZZ enable clean, repeatable clipping with <50 mV overshoot at 1 mA step input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 6.8 V ±5%, 1 W rating, DO-41 package, higher PD but larger footprint | Preferred where higher continuous power margin is required; not suitable for space-constrained DO-34 layouts | Select when thermal headroom >400 mW is needed and board area allows DO-41 pitch |
| BZX55C6V8 | 6.8 V ±5%, 500 mW rating, DO-35 package, slightly higher ZZ (5 Ω) and IR (3 µA) | Compatible in most DO-34 footprints via adapter; acceptable where 1.5× leakage is tolerable | Choose for RoHS-compliant sourcing if legacy RD6.8JS-T1-AZ stock is limited |
Compared with 1N4734A and BZX55C6V8, RD6.8JS-T1-AZ offers optimal balance of DO-34 form factor, 400 mW rating, and 2 µA leakage-making it ideal for compact, low-power, high-stability reference designs where board space and quiescent current are critical.
Availability
RD6.8JS-T1-AZ is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, constant current source, and waveform clipping applications requiring stable component supply and long-lifecycle support.
Supply support for RD6.8JS-T1-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 global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for industrial, automotive, and consumer systems.
The RD6.8JS-T1-AZ belongs to the legacy RDx.xES Zener diode family designed for general-purpose voltage regulation and protection in standard-grade industrial and consumer electronics.
FAQ
What is the zener voltage tolerance and test condition for RD6.8JS-T1-AZ?
The RD6.8JS-T1-AZ has a zener voltage tolerance of ±5% measured at a test current of 5 mA. This specification is confirmed in the official Renesas datasheet D13935EJ7V0DS, where the min/max VZ range is listed as 6.32 V to 6.97 V under those conditions. The RD6.8JS-T1-AZ maintains this tolerance across its qualified operating temperature range and is rated for long-term stability in standard-grade applications.
Does RD6.8JS-T1-AZ support surge protection, and what is its peak pulse rating?
Yes, RD6.8JS-T1-AZ supports transient surge protection with a non-repetitive surge reverse power rating of 100 W for pulse width t = 10 µs, as specified in Figure 10 of the Renesas datasheet. This capability allows the RD6.8JS-T1-AZ to safely clamp fast-rising voltage spikes such as ESD or inductive kickback without parametric shift or failure, provided average power remains within the 400 mW steady-state limit.
What is the thermal resistance characteristic of RD6.8JS-T1-AZ, and how does PCB layout affect it?
The thermal resistance of RD6.8JS-T1-AZ depends on PCB copper area: Figure 7 shows junction-to-ambient Rth drops from ~375°C/W on minimal pads to ~150°C/W with a 10 mm² copper pad (t = 0.035 mm). Proper thermal relief design directly impacts the RD6.8JS-T1-AZ's ability to sustain 400 mW dissipation-undersized pads cause premature thermal shutdown or parameter drift. The RD6.8JS-T1-AZ's DHD construction maximizes this benefit.
Is RD6.8JS-T1-AZ RoHS compliant, and what is its environmental status?
RD6.8JS-T1-AZ was originally released prior to RoHS enforcement and is classified as a legacy product. While Renesas does not list explicit RoHS status for this part in D13935EJ7V0DS, its DO-34 glass package contains no intentionally added lead in the die attach or internal structure per historical NEC manufacturing practice. For new designs, Aetrix recommends verifying compliance via material declaration or selecting modern equivalents like BZX55C6V8 if RoHS certification is contractually required for the RD6.8JS-T1-AZ.
How does the dynamic impedance of RD6.8JS-T1-AZ impact voltage regulation accuracy?
The RD6.8JS-T1-AZ exhibits a dynamic impedance (ZZ) of 3.5 Ω at IZ = 5 mA, meaning a 1 mA change in zener current causes only ~3.5 mV output variation. This low ZZ ensures high regulation accuracy under varying load conditions-critical in feedback networks where even small VZ shifts degrade PSU output stability. The RD6.8JS-T1-AZ's planar process and DHD construction maintain this ZZ consistency across temperature and lifetime.
RD6.8JS-T1-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:
- -
RD6.8JS-T1-AZ FAQ
1.How can I place an order for RD6.8JS-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD6.8JS-T1-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 RD6.8JS-T1-AZ reliable?
The price and inventory of RD6.8JS-T1-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD6.8JS-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD6.8JS-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD6.8JS-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD6.8JS-T1-AZ?
RD6.8JS-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD6.8JS-T1-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 RD6.8JS-T1-AZ?
For technical support, including RD6.8JS-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD6.8JS-T1-AZ requirements.
6.How does Aetrix verify that RD6.8JS-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD6.8JS-T1-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 RD6.8JS-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD6.8JS-T1-AZ?
All RD6.8JS-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD6.8JS-T1-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 RD6.8JS-T1-AZ part is unused and in its original packaging.
Return procedure for RD6.8JS-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD6.8JS-T1-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…
