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Renesas HZU6.8B3TRF-E
- Part No.:
- HZU6.8B3TRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU6.8B3TRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
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Inventory:2,826
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Product details
Overview
HZU6.8B3TRF-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage stabilization in low-power analog and reference circuits. It delivers a nominal Zener voltage of 6.86 V to 7.14 V at 5 mA, with dynamic resistance of 30 Ω, power dissipation up to 200 mW, and operates within –55 °C to +150 °C junction temperature range - commonly used in voltage regulation for sensor biasing and ADC reference conditioning.
For engineers reviewing the HZU6.8B3TRF-E datasheet, HZU6.8B3TRF-E pinout, HZU6.8B3TRF-E application, or HZU6.8B3TRF-E equivalent, key selection criteria include Zener voltage tolerance (±2.1% at 5 mA), ultra-small URP package footprint (1.55 × 0.80 mm), reverse current ≤2 µA at VR = 5.0 V, and thermal stability for compact DC-DC feedback networks.
Technical Context
This Zener diode employs a silicon planar junction structure optimized for stable reverse-breakdown behavior under low-current conditions (IZ = 5 mA). Its design targets high repeatability in voltage regulation across ambient temperatures, supported by a Zener voltage temperature coefficient near 0 mV/°C (per Fig.2 for ~6.8 V devices).
The device is rated for 200 mW power dissipation at 25 °C, derating linearly above Ta = 25 °C per Fig.3, and features a cathode-anode terminal configuration compatible with automated SMT placement. It is not intended for surge suppression or high-current shunt regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.86 V to 7.14 V at IZ = 5 mA - defines tight regulation window for precision 6.8 V references |
| Dynamic Resistance (rd) | 30 Ω max at IZ = 5 mA - ensures minimal output impedance shift under load variation |
| Reverse Current (IR) | ≤2 µA at VR = 5.0 V - guarantees low leakage in standby-biased circuits |
| Power Dissipation (Pd) | 200 mW at Ta = 25 °C - sets maximum continuous DC power handling in PCB-constrained layouts |
| Junction Temperature (Tj) | –55 °C to +150 °C - enables operation in industrial and automotive under-hood environments |
| Package | URP (Ultra Small Resin Package), JEITA code SC-76A - 1.55 × 0.80 mm footprint for high-density SMT designs |
Pinout & Package
URP (Ultra Small Resin Package) is a surface-mount, two-terminal plastic package with cathode marked by a visible band on the top surface. Dimensions: 1.55 mm (L) × 0.80 mm (W) × 0.55 mm (H), weight ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; polarity must be observed to maintain reverse-bias operation |
| 2 | Anode | Connected to ground or lower-potential rail; forms current path during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Grade B3 Zener tolerance | ±2.1% voltage spread (6.86–7.14 V) - enables tighter system-level voltage margin control vs. B/B1/B2 grades |
| Low dynamic resistance | 30 Ω max - improves regulation accuracy under varying load currents in feedback loops |
| Ultra-small URP package | SC-76A footprint (1.55 × 0.80 mm) - supports miniaturized portable and wearable electronics layouts |
| Taped delivery | TRF taping (3,000 pcs/reel) - compatible with high-speed pick-and-place equipment for automated assembly |
Applications
| ADC Reference Biasing | Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 6.8 V reference to SAR ADC voltage reference input in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed reference voltage independent of supply ripple. Use Value: Enables <±0.5 LSB integral nonlinearity error by minimizing reference drift over temperature (γZ ≈ 0 mV/°C near 6.8 V). |
Use Scenario: Biasing bridge-based pressure sensors in HVAC control modules where supply rails vary between 9–12 V. IC Role / Device Role / Timing Role: Shunt regulator establishing constant excitation voltage across sensor elements. Use Value: Maintains sensor output linearity by holding excitation voltage stable to ±15 mV over –40 °C to +85 °C ambient. |
| Low-Power Microcontroller Reset Circuit | Optocoupler Input Stabilization |
Use Scenario: Generating clean 6.8 V threshold for supervisor IC reset assertion in energy-harvesting edge controllers. IC Role / Device Role / Timing Role: Voltage reference element in RC-based reset timing network with hysteresis. Use Value: Ensures deterministic reset activation at VDD ≥ 6.85 V, reducing false triggers caused by supply transients. |
Use Scenario: Stabilizing forward current into PC817 optocoupler LED anode in isolated SMPS feedback paths. IC Role / Device Role / Timing Role: Series-shunt regulator limiting LED drive voltage to prevent current runaway. Use Value: Limits optocoupler CTR variation to ±8% across 5–12 V input ranges, improving loop stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage stabilization applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8LT1G | Zener voltage 6.46–7.14 V (±5%), rd = 40 Ω, SOT-23 package (2.9 × 1.3 mm) | Larger footprint; higher dynamic resistance reduces regulation precision in low-current feedback | Preferred when board space allows larger package and ±5% tolerance is acceptable |
| MMSZ4688T1G | Zener voltage 6.46–7.14 V (±5%), rd = 50 Ω, SOD-123 package (2.7 × 1.6 mm) | Higher leakage (IR ≤ 5 µA at 5.0 V); less suitable for ultra-low-power sleep modes | Selected for cost-sensitive consumer applications where leakage <5 µA is tolerable |
Compared with HZU6.8B3TRF-E, BZX84-C6V8LT1G and MMSZ4688T1G offer wider voltage tolerance and larger packages but lack its 30 Ω dynamic resistance and B3-grade ±2.1% tight tolerance - making HZU6.8B3TRF-E preferable for precision analog references where regulation stability and miniaturization are critical.
Availability
HZU6.8B3TRF-E is available at Aetrix Electronics and suitable for voltage reference design, sensor excitation circuits, and microcontroller reset supervision requiring stable component supply and consistent Zener voltage grading.
Supply support for HZU6.8B3TRF-E 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 is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
HZU6.8B3TRF-E belongs to the HZU Series of silicon planar Zener diodes engineered for high-precision, low-power voltage stabilization in space-constrained surface-mount applications.
FAQ
What is the Zener voltage tolerance of HZU6.8B3TRF-E at 5 mA?
The HZU6.8B3TRF-E has a Zener voltage range of 6.86 V to 7.14 V at IZ = 5 mA, corresponding to a ±2.1% tolerance. This B3 grade offers tighter specification than B1 (±3.0%) or B2 (±3.5%) variants in the same series, enabling improved accuracy in reference-sensitive circuits.
Does HZU6.8B3TRF-E support reflow soldering per J-STD-020?
Yes, HZU6.8B3TRF-E is qualified for standard lead-free reflow soldering per J-STD-020. Its URP package uses moisture sensitivity level (MSL) 1 rating, allowing unlimited floor life at ≤30 °C/60% RH, and withstands peak reflow temperatures up to 260 °C for ≤10 seconds.
What is the maximum reverse current for HZU6.8B3TRF-E at 5.0 V?
The maximum reverse current (IR) for HZU6.8B3TRF-E is 2 µA when tested at VR = 5.0 V. This low leakage supports energy-efficient operation in always-on sensor biasing and battery-backed monitoring systems.
Can HZU6.8B3TRF-E replace HZU6.8B2TRF-E in existing designs?
Yes, HZU6.8B3TRF-E is a direct functional upgrade to HZU6.8B2TRF-E, sharing identical package (URP), pinout, and absolute maximum ratings. Its tighter Zener voltage tolerance (±2.1% vs. ±3.5%) and lower dynamic resistance (30 Ω vs. 35 Ω) improve regulation performance without layout changes.
Is HZU6.8B3TRF-E RoHS compliant and halogen-free?
Yes, HZU6.8B3TRF-E complies with EU RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The URP package uses lead-free matte tin plating and environmentally compliant molding compound, verified in Renesas' material declarations.
HZU6.8B3TRF-E 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:
- -
HZU6.8B3TRF-E FAQ
1.How can I place an order for HZU6.8B3TRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU6.8B3TRF-E 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 HZU6.8B3TRF-E reliable?
The price and inventory of HZU6.8B3TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU6.8B3TRF-E is usually 5 days.
3.What payment methods are accepted for HZU6.8B3TRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU6.8B3TRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU6.8B3TRF-E?
HZU6.8B3TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU6.8B3TRF-E 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 HZU6.8B3TRF-E?
For technical support, including HZU6.8B3TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU6.8B3TRF-E requirements.
6.How does Aetrix verify that HZU6.8B3TRF-E is sourced from the original manufacturer or authorized distributors?
All HZU6.8B3TRF-E 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 HZU6.8B3TRF-E meets industry standards.
7.What is the process for return or replacement of HZU6.8B3TRF-E?
All HZU6.8B3TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU6.8B3TRF-E, 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 HZU6.8B3TRF-E part is unused and in its original packaging.
Return procedure for HZU6.8B3TRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZU6.8B3TRF-E Tags
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