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NXP Semiconductors BZX84-B6V8/LF1R
- Part No.:
- BZX84-B6V8/LF1R
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B6V8/LF1R.pdf
- Description:
- DIODE ZENER 6.8V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
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Product details
Overview
BZX84-B6V8/LF1R from NXP Semiconductors is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 6.66 V to 6.94 V nominal breakdown at 5 mA, with 250 mW total power dissipation and 30 Ω typical differential resistance. It serves as a precision reference or overvoltage clamp in low-power analog signal conditioning and power rail stabilization circuits.
For engineers reviewing the BZX84-B6V8/LF1R datasheet, BZX84-B6V8/LF1R pinout, BZX84-B6V8/LF1R application, or BZX84-B6V8/LF1R equivalent, key selection criteria include its AEC-Q101 qualification, 6.8 V nominal Zener voltage with ±2 % tolerance, 30 Ω dynamic impedance at 5 mA, thermal resistance of 500 K/W (junction-to-ambient), and compatibility with FR4 PCB mounting under standard reflow profiles.
Technical Context
This device operates as a reverse-biased Zener diode delivering stable voltage regulation via avalanche and Zener breakdown mechanisms. Its 6.8 V nominal working voltage targets mid-range supply monitoring and reference applications where tighter tolerance than ±5 % (BZX84-C) is required but ±1 % (BZX84-A) is unnecessary.
Designed for surface-mount use on single-sided FR4 PCBs with tin-plated copper, it supports non-repetitive peak reverse power dissipation up to 40 W for ≤100 μs pulses and maintains operation across −65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.66 V to 6.94 V at IZ = 5 mA - defines regulated output voltage window under standard test current |
| Tolerance | ±2 % - enables tighter voltage margin control than ±5 % variants without premium ±1 % cost |
| Differential Resistance (rdiff) | 30 Ω typical at IZ = 5 mA - determines load regulation error sensitivity to current variation |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB layout |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures low-loss conduction when used in polarity protection or clamping configurations |
| Non-repetitive Peak Reverse Power | 40 W for tp ≤ 100 μs - supports transient surge suppression in automotive and industrial interfaces |
| Temperature Coefficient (SZ) | +1.2 mV/K to +4.5 mV/K - indicates positive drift with temperature, critical for high-stability reference designs |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H); standard footprint per Fig 9 (reflow) and Fig 10 (wave soldering).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; forward conduction path entry |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; must remain unconnected on PCB |
| 3 | Cathode (K) | Connected to higher-potential node in reverse-bias configuration; primary Zener regulation terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and ESD robustness |
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than BZX84-C series while maintaining cost efficiency vs. ±1 % BZX84-A |
| Low differential resistance (30 Ω typ.) | Minimizes output voltage deviation under varying load current in feedback or reference paths |
| Non-repetitive 40 W surge capability | Provides transient overvoltage protection without external TVS in space-constrained designs |
| FR4 PCB-compatible thermal performance | Rth(j-a) = 500 K/W allows direct integration into consumer and industrial PCBs without heatsinking |
Applications
| Power Supply Monitoring | Signal Level Clamping |
|---|---|
Use Scenario: Monitoring 5 V or 12 V rail integrity in automotive body control modules using comparator input. IC Role / Device Role / Timing Role: Zener reference providing stable threshold voltage for rail-fail detection circuitry. Use Value: ±2 % tolerance ensures reliable trip point discrimination between nominal and out-of-spec conditions without calibration. |
Use Scenario: Protecting ADC inputs from ESD-induced overvoltage in industrial sensor interfaces. IC Role / Device Role / Timing Role: Bidirectional clamping element limiting signal swing to safe levels during transients. Use Value: 40 W non-repetitive surge rating absorbs fast pulses without degradation, preserving ADC front-end integrity. |
| Reference Voltage Source | Overvoltage Protection |
Use Scenario: Generating precise 6.8 V reference for op-amp biasing in battery-powered instrumentation. IC Role / Device Role / Timing Role: Passive voltage reference establishing stable operating point for analog signal chain. Use Value: 30 Ω differential resistance minimizes voltage shift under microamp-level load currents, improving measurement accuracy. |
Use Scenario: Safeguarding USB port power lines against accidental 12 V insertion in embedded host devices. IC Role / Device Role / Timing Role: Shunt regulator diverting excess current when input exceeds 6.94 V. Use Value: 250 mW continuous dissipation supports sustained fault conditions without thermal runaway on standard PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5235B (ON Semiconductor) | 6.8 V ±5 % tolerance; 100 Ω typical rdiff; same SOT23 package | Lower accuracy and higher impedance limit use in precision references but acceptable for basic clamping | Select when cost sensitivity outweighs regulation tightness and dynamic impedance requirements |
| BZX84-C6V8 (NXP) | 6.4 V to 7.2 V tolerance band (±5 %); identical package and thermal specs | Broader voltage spread increases risk of false triggering in narrow-margin monitoring circuits | Choose only where system-level calibration compensates for wider Zener spread or where surge immunity dominates accuracy needs |
Compared with MMBZ5235B and BZX84-C6V8, BZX84-B6V8/LF1R delivers superior voltage stability (±2 % vs. ±5 %) and lower dynamic impedance (30 Ω vs. 100 Ω), making it preferable for reference and monitoring roles where repeatability and load regulation matter most.
Availability
BZX84-B6V8/LF1R is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal conditioning, and portable instrumentation requiring stable component supply with AEC-Q101 compliance and SOT23 footprint compatibility.
Supply support for BZX84-B6V8/LF1R 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The BZX84 series is part of NXP's discrete voltage regulator portfolio, engineered for high-reliability, low-power Zener regulation in space-constrained and thermally demanding environments such as automotive ECUs and industrial control units.
FAQ
What is the nominal Zener voltage of BZX84-B6V8/LF1R and how is it tested?
The nominal Zener voltage of BZX84-B6V8/LF1R is 6.8 V, specified as 6.66 V minimum to 6.94 V maximum at a test current of 5 mA. This value is measured under controlled conditions per IEC 60134, with junction temperature maintained at 25 °C and pulse duration limited to avoid self-heating effects. The BZX84-B6V8/LF1R achieves this regulation through combined Zener and avalanche breakdown mechanisms optimized for mid-voltage stability.
Is BZX84-B6V8/LF1R suitable for automotive applications?
Yes, BZX84-B6V8/LF1R is AEC-Q101 qualified for automotive use, having passed stress tests including temperature cycling, high-temperature reverse bias, and ESD robustness. Its operating junction temperature range of −65 °C to +150 °C and qualification on FR4 PCBs align with under-hood and cabin module requirements. The BZX84-B6V8/LF1R is commonly deployed in body control units and infotainment power supervisors.
What is the meaning of the 'B' in BZX84-B6V8/LF1R?
The 'B' in BZX84-B6V8/LF1R denotes the ±2 % Zener voltage tolerance grade within the BZX84 family. This distinguishes it from 'A' (±1 %) and 'C' (approximately ±5 %) variants. The BZX84-B6V8/LF1R provides tighter regulation than C-grade parts while offering better cost-efficiency than A-grade equivalents, making it optimal for applications needing moderate accuracy without premium pricing.
How does the differential resistance of BZX84-B6V8/LF1R affect circuit performance?
The typical differential resistance of 30 Ω at 5 mA means that a 1 mA change in Zener current causes approximately 30 mV shift in regulated voltage. This directly impacts load regulation in reference circuits and noise rejection in clamping applications. Lower rdiff improves stability-critical in precision analog stages where BZX84-B6V8/LF1R is often selected over higher-impedance alternatives like MMBZ5235B.
Can BZX84-B6V8/LF1R be used in bidirectional ESD protection?
No, BZX84-B6V8/LF1R is a unidirectional Zener diode configured for reverse-bias regulation only. Its anode and cathode terminals are not symmetrical, and forward conduction (anode > cathode) is limited to ≤0.9 V at 10 mA-insufficient for robust bidirectional clamping. For ESD protection, dedicated bidirectional TVS diodes such as PESD5V0S1BA should be used instead of BZX84-B6V8/LF1R.
BZX84-B6V8/LF1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 250 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 ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (TO-236AB)
BZX84-B6V8/LF1R FAQ
1.How can I place an order for BZX84-B6V8/LF1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B6V8/LF1R 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 BZX84-B6V8/LF1R reliable?
The price and inventory of BZX84-B6V8/LF1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B6V8/LF1R is usually 5 days.
3.What payment methods are accepted for BZX84-B6V8/LF1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B6V8/LF1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B6V8/LF1R?
BZX84-B6V8/LF1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B6V8/LF1R 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 BZX84-B6V8/LF1R?
For technical support, including BZX84-B6V8/LF1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B6V8/LF1R requirements.
6.How does Aetrix verify that BZX84-B6V8/LF1R is sourced from the original manufacturer or authorized distributors?
All BZX84-B6V8/LF1R 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 BZX84-B6V8/LF1R meets industry standards.
7.What is the process for return or replacement of BZX84-B6V8/LF1R?
All BZX84-B6V8/LF1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B6V8/LF1R, 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 BZX84-B6V8/LF1R part is unused and in its original packaging.
Return procedure for BZX84-B6V8/LF1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B6V8/LF1R Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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