My Inquiry
My Account
Nexperia USA Inc. BZX79-C6V8,133
- Part No.:
- BZX79-C6V8,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-C6V8,133.pdf
- Description:
- DIODE ZENER 6.8V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:20,528
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX79-C6V8,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode in DO-35 (SOD27) glass package, designed for low-power voltage reference and stabilization at nominal 6.8 V with 2 μA reverse leakage at 4 V, 30–80 Ω dynamic impedance, and 500 mW total power dissipation at 50 °C ambient - used in precision analog sensor biasing, microcontroller reset circuitry, and low-current power rail clamping.
For engineers reviewing the BZX79-C6V8,133 datasheet, BZX79-C6V8,133 pinout, BZX79-C6V8,133 application, or BZX79-C6V8,133 equivalent, this page delivers verified electrical parameters, thermal limits, junction-to-ambient resistance, temperature coefficient behavior, and real-world design context for stable 6.8 V reference implementation in space-constrained through-hole systems.
Technical Context
The BZX79-C6V8,133 operates as a two-terminal silicon Zener diode with avalanche-dominated breakdown at 6.66–6.94 V (IZ = 5 mA), exhibiting a positive temperature coefficient of +1.2 to +4.5 mV/K across 1–10 mA test current range. Its hermetically sealed DO-35 glass package ensures long-term stability under thermal cycling and humidity exposure.
It delivers regulated voltage via controlled reverse-bias conduction, with differential resistance of 30–80 Ω enabling tight regulation under load variation, and non-repetitive peak reverse power handling up to 40 W for transient suppression. Junction temperature is rated from −65 °C to +200 °C, supporting industrial and automotive ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V (6.66–6.94 V at IZ = 5 mA); defines stable reference point for analog circuits and voltage monitoring. |
| Reverse Leakage Current | 2 μA max at VR = 4 V; ensures minimal quiescent power loss in battery-powered reference designs. |
| Differential Resistance | 30–80 Ω (typ. 60 Ω at IZ = 5 mA); determines output voltage deviation under varying load current. |
| Power Dissipation | 500 mW at Tamb = 50 °C (no PCB pad); sets maximum continuous DC power handling in standard mounting. |
| Temperature Coefficient | +1.2 to +4.5 mV/K (at IZ = 5 mA); enables predictable drift compensation in temperature-sensitive references. |
| Junction-to-Ambient Rth | 380 K/W (lead length ≤8 mm); informs thermal derating needed for sustained operation above 50 °C ambient. |
| Package | DO-35 (SOD27) axial glass; provides hermetic sealing, lead-free compatibility, and through-hole reliability. |
Pinout & Package
Hermetically sealed DO-35 (SOD27) axial-leaded glass package with cathode band marking. Leads are tinned copper-clad steel; body diameter 1.85 mm, length 4.25 mm, lead spacing 25.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / reference ground node | Connected to circuit common when used in reverse-bias regulation; forms low-impedance return path. |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Supplies stabilized 6.8 V relative to anode; must be biased with current-limiting resistor to maintain IZ ≥1 mA. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective voltage referencing where tighter regulation is unnecessary (e.g., non-critical biasing). |
| 500 mW power rating at 50 °C | Supports continuous operation in compact enclosures without forced cooling or heatsinking. |
| Hermetic DO-35 glass construction | Guarantees long-term parameter stability and moisture resistance in harsh industrial environments. |
| Low 2 μA IR at 4 V reverse bias | Minimizes standby current draw in always-on sensor nodes and low-power MCU reset circuits. |
| 30–80 Ω dynamic impedance | Provides predictable load regulation within ±0.1 V over 1–10 mA current variation. |
Applications
| Microcontroller Reset Circuit | ADC Reference Stabilization |
|---|---|
|
Use Scenario: Generating a clean, temperature-stable 6.8 V threshold to trigger POR (power-on reset) in 8-bit MCUs operating from 9 V supply rails. IC Role / Device Role / Timing Role: Zener diode acts as precision voltage comparator input reference, defining exact reset assertion level. Use Value: Ensures deterministic reset timing across −40 °C to +85 °C with <±20 mV drift, eliminating brown-out false triggers. |
Use Scenario: Providing a stable reference voltage for 12-bit SAR ADCs in industrial data loggers powered by unregulated 12 V DC inputs. IC Role / Device Role / Timing Role: Functions as shunt reference source, delivering low-noise 6.8 V to ADC VREF pin via RC filter. Use Value: Limits reference error to <0.3% FS over temperature, preserving measurement accuracy without external voltage reference IC. |
| LED Current Limiter | Overvoltage Clamp for Sensor Interface |
|
Use Scenario: Biasing high-brightness red LEDs in automotive dashboard backlighting where constant current is derived from Zener-regulated voltage drop. IC Role / Device Role / Timing Role: Serves as fixed-voltage node to set emitter-base voltage of series pass transistor controlling LED current. Use Value: Maintains ±3% LED brightness consistency across 12–16 V vehicle battery fluctuations and ambient temperature shifts. |
Use Scenario: Protecting analog front-end op-amps in pressure transducer signal conditioning from ESD-induced voltage spikes on 5 V supply lines. IC Role / Device Role / Timing Role: Acts as fast-acting shunt clamp, conducting surge energy above 6.8 V before downstream IC damage occurs. Use Value: Absorbs 40 W non-repetitive surges (100 μs) while limiting clamped voltage to ≤7.5 V, meeting IEC 61000-4-2 Level 3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 6.8 V ±5%, 1 W power rating, DO-41 package, higher rdif (10 Ω min), lower IR (1 μA @ 4 V) | Requires larger PCB footprint; better suited for higher-power regulation but less optimal for space-constrained DO-35 layouts | Select when >500 mW continuous dissipation or lower leakage is required; verify mechanical fit for through-hole redesign. |
| BZX79-B6V8,133 | 6.8 V ±2%, same DO-35 package, identical thermal specs, tighter tolerance increases cost ~15% | Used where reference accuracy >±2% is mandated (e.g., calibration equipment, metrology-grade sensors) | Choose only if system-level tolerance budget demands <±2% Zener voltage drift; otherwise C-series offers best cost/performance balance. |
Compared with 1N4734A, BZX79-C6V8,133 saves board area and matches legacy DO-35 footprints, while versus BZX79-B6V8,133 it trades ±2% accuracy for lower unit cost and sufficient stability for non-critical biasing - making it optimal for high-volume consumer and industrial control applications.
Availability
BZX79-C6V8,133 is available at Aetrix Electronics and suitable for microcontroller reset circuits, ADC reference stabilization, LED current limiting, and overvoltage clamping requiring stable component supply across automotive, industrial control, and consumer electronics production.
Supply support for BZX79-C6V8,133 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
Nexperia is a global leader in discrete semiconductors, formed in 2017 from the former NXP Standard Products division, specializing in high-reliability diodes, MOSFETs, and logic devices for automotive and industrial markets.
The BZX79 series belongs to Nexperia's legacy Zener diode portfolio, engineered specifically for cost-sensitive, space-constrained voltage reference and protection roles in through-hole assembled systems where hermetic stability and long-term parametric consistency are critical.
FAQ
What is the maximum continuous reverse current the BZX79-C6V8,133 can handle without degradation?
The device has no specified maximum continuous reverse current; instead, its safe operating limit is defined by power dissipation. At Tamb = 50 °C, it supports up to 73.5 mA (500 mW ÷ 6.8 V) continuously. Derating is required above 50 °C using Rth j-a = 380 K/W, and junction temperature must remain ≤200 °C.
Can BZX79-C6V8,133 be used in surface-mount designs?
No - it is exclusively a through-hole DO-35 (SOD27) axial package with 25.4 mm lead spacing and glass body. It lacks SMD-compatible terminations or reflow profile specifications. For SMT equivalents, consider Nexperia's PZM series (e.g., PZM6.8NB,115) in SOD-123.
How does temperature affect the Zener voltage of BZX79-C6V8,133?
Its temperature coefficient ranges from +1.2 to +4.5 mV/K at IZ = 5 mA, meaning voltage increases ~3.3 mV per °C rise on average. This results in +0.33 V drift over 100 °C span - acceptable for non-precision applications but requires compensation in metrology-grade references.
Is the BZX79-C6V8,133 RoHS compliant and lead-free?
Yes - Nexperia certifies all BZX79-C variants as RoHS-compliant and lead-free per EU Directive 2011/65/EU. The DO-35 package uses lead-free tinning on copper-clad steel leads, with no exemptions applied; full compliance documentation is available via Nexperia's product portal.
BZX79-C6V8,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ALF2
BZX79-C6V8,133 FAQ
1.How can I place an order for BZX79-C6V8,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-C6V8,133 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 BZX79-C6V8,133 reliable?
The price and inventory of BZX79-C6V8,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C6V8,133 is usually 5 days.
3.What payment methods are accepted for BZX79-C6V8,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C6V8,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-C6V8,133?
BZX79-C6V8,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-C6V8,133 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 BZX79-C6V8,133?
For technical support, including BZX79-C6V8,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C6V8,133 requirements.
6.How does Aetrix verify that BZX79-C6V8,133 is sourced from the original manufacturer or authorized distributors?
All BZX79-C6V8,133 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 BZX79-C6V8,133 meets industry standards.
7.What is the process for return or replacement of BZX79-C6V8,133?
All BZX79-C6V8,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C6V8,133, 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 BZX79-C6V8,133 part is unused and in its original packaging.
Return procedure for BZX79-C6V8,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-C6V8,133 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
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…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
