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Renesas HZU4.7B2TRF-E
- Part No.:
- HZU4.7B2TRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU4.7B2TRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:66,271
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Product details
Overview
HZU4.7B2TRF-E from Renesas Electronics is a silicon planar Zener diode designed for voltage stabilization in low-power analog and digital supply rail regulation circuits, with a nominal Zener voltage of 4.7 V (min 4.98 V, max 5.20 V at 5 mA), dynamic resistance of 130 Ω, and power dissipation rating of 200 mW in the ultra-small URP (SC-76A) surface-mount package.
For engineers reviewing the HZU4.7B2TRF-E datasheet, HZU4.7B2TRF-E pinout, HZU4.7B2TRF-E application, or HZU4.7B2TRF-E equivalent, this device serves as a precision reference in power management IC bias networks, sensor signal conditioning front-ends, and microcontroller reset circuitry where tight voltage tolerance and low thermal drift are required.
Technical Context
The HZU4.7B2TRF-E operates as a two-terminal shunt regulator, maintaining stable output voltage across its cathode-anode terminals under reverse-biased conditions. Its Zener breakdown mechanism provides predictable conduction onset at 4.98–5.20 V with 5 mA test current, and exhibits a temperature coefficient near 0 mV/°C per Fig.2 - indicating minimal VZ drift over ambient temperature.
Designed for surface-mount assembly, it uses a silicon planar junction structure encapsulated in an epoxy-molded URP (SC-76A) package with 0.8 mm body height and 1.5 mm × 1.25 mm footprint. Thermal derating follows the curve in Fig.3, limiting usable power to ≤100 mW above +70°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.98 V to 5.20 V at IZ = 5 mA - defines stable regulation range for 5 V logic supply clamping or reference generation |
| Dynamic Resistance (rd) | 130 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity in shunt configuration |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C - sets maximum continuous reverse power before thermal runaway; derates linearly above 25°C |
| Reverse Current (IR) | 10 μA max at VR = 1.0 V - ensures low leakage in standby or high-impedance bias networks |
| Junction Temperature (Tj) | 150°C max - constrains PCB layout thermal relief and adjacent heat-generating component placement |
| Package | URP (SC-76A), 2-pin SMD - enables 0603-class board space usage with automated pick-and-place compatibility |
Pinout & Package
URP (Ultra Small Resin Package) is a 2-pin surface-mount package conforming to JEITA code PTSP0002ZA-A and industry-standard SC-76A outline. Dimensions: 1.50 mm × 1.25 mm × 0.80 mm (L × W × H), mass ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated voltage node; carries reverse current during Zener conduction |
| 2 | Anode | Connected to circuit ground or lower-potential reference; completes shunt path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small URP package | 1.5 mm × 1.25 mm footprint enables dense PCB layouts in space-constrained IoT sensors and wearables |
| Taped and reel packaging (TRF) | 3,000 pcs/reel format supports high-speed SMT line feeding without manual handling or static risk |
| Grade B2 Zener tolerance | ±4.3% total VZ spread (4.98–5.20 V) offers tighter regulation than standard-grade Zeners for mid-precision references |
| Low dynamic resistance | 130 Ω max improves regulation accuracy under varying load currents in feedback or clamp applications |
| 150°C junction rating | Supports operation in industrial environments up to +85°C ambient when properly derated per Fig.3 |
Applications
| Microcontroller Reset Circuit | ADC Reference Clamp |
|---|---|
|
Use Scenario: Provides clean, stable 5 V threshold for microcontroller POR (power-on reset) and brown-out detection circuits. IC Role / Device Role / Timing Role: Shunt voltage reference defining reset assertion level independent of input rail ripple. Use Value: Ensures deterministic reset behavior across temperature (±0.5% VZ drift) and eliminates false triggers caused by supply transients. |
Use Scenario: Clamps ADC input voltage to prevent overvoltage damage while preserving signal integrity in sensor front-ends. IC Role / Device Role / Timing Role: Protective shunt limiter placed ahead of SAR or delta-sigma ADC inputs. Use Value: Limits input to ≤5.20 V with <10 μA leakage below 1.0 V, avoiding loading of high-impedance sensor outputs. |
| Linear Regulator Feedback | LED Current Bias Network |
|
Use Scenario: Sets precise output voltage in adjustable LDO feedback divider by replacing top resistor with Zener reference. IC Role / Device Role / Timing Role: Precision voltage reference element in error amplifier feedback loop. Use Value: Achieves ±1% output regulation accuracy without external trimming, leveraging 130 Ω rd for stable loop response. |
Use Scenario: Establishes stable bias current for indicator LEDs in battery-powered instrumentation panels. IC Role / Device Role / Timing Role: Constant-voltage source driving series LED + current-limiting resistor. Use Value: Maintains consistent LED brightness across 2.7–5.5 V supply range with <5% forward voltage variation over -40°C to +85°C. |
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-C4V7LT1G | 4.7 V nominal, ±5% tolerance (4.46–4.94 V), 300 mW Pd, SOT-23 package (larger footprint) | Higher power rating but looser VZ tolerance; less suitable for precision reset thresholds | Select when higher surge capability is needed and board area allows SOT-23; not drop-in due to different pinout and size |
| MMSZ4704T1G | 4.7 V nominal, ±5% tolerance (4.46–4.94 V), 500 mW Pd, SOD-123 package (3.7 mm × 1.6 mm) | Higher power and larger thermal mass, but 2× footprint area vs. URP; no grade-B2-equivalent tight tolerance | Prefer for high-reliability industrial supplies where thermal margin > size constraint; requires PCB redesign |
Compared with BZX84-C4V7LT1G and MMSZ4704T1G, the HZU4.7B2TRF-E delivers tighter voltage control (±4.3% vs. ±5%) in a significantly smaller package (1.5 × 1.25 mm vs. ≥3.7 × 1.6 mm), making it optimal for miniaturized designs where regulation accuracy and board space are jointly critical.
Availability
HZU4.7B2TRF-E is available at Aetrix Electronics and suitable for microcontroller reset circuits, ADC input protection, linear regulator feedback networks, and LED biasing applications requiring stable component supply with guaranteed long-term continuity.
Supply support for HZU4.7B2TRF-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 global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and consumer markets.
The HZU Series belongs to Renesas' discrete Zener diode product line, engineered specifically for compact, high-stability voltage reference and clamping functions in space-constrained, low-power electronic systems.
FAQ
What is the Zener voltage tolerance of HZU4.7B2TRF-E?
The HZU4.7B2TRF-E has a Zener voltage range of 4.98 V to 5.20 V at IZ = 5 mA, corresponding to Grade B2 specification with ±4.3% tolerance around the nominal 4.7 V rating. This tighter tolerance than standard-grade Zeners supports improved accuracy in reset and reference applications without calibration.
Is HZU4.7B2TRF-E RoHS compliant?
Yes, HZU4.7B2TRF-E complies with EU RoHS Directive requirements as confirmed by Renesas Electronics' environmental documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), and is suitable for environmentally regulated commercial and industrial designs.
What is the maximum reverse current before Zener conduction in HZU4.7B2TRF-E?
The HZU4.7B2TRF-E specifies a maximum reverse current (IR) of 10 μA at VR = 1.0 V, measured at Ta = 25°C. This low leakage ensures minimal parasitic loading in high-impedance bias networks and preserves signal fidelity in precision analog stages using the HZU4.7B2TRF-E as a reference.
Can HZU4.7B2TRF-E be used in place of a 5 V linear regulator?
No - the HZU4.7B2TRF-E is a two-terminal shunt Zener diode, not a three-terminal series regulator. It requires an external current-limiting resistor and cannot deliver regulated output current without significant voltage drop or thermal instability. It serves best as a reference or clamp, not as a standalone 5 V supply replacement.
What is the thermal derating behavior of HZU4.7B2TRF-E above 25°C ambient?
Per Fig.3 in the Renesas datasheet, HZU4.7B2TRF-E's power dissipation must be linearly derated above 25°C ambient temperature, reaching zero allowable power at approximately +150°C case temperature. At +70°C ambient, maximum usable power drops to ~100 mW - requiring careful PCB copper area allocation and adjacent component thermal isolation for reliable operation.
HZU4.7B2TRF-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- -
HZU4.7B2TRF-E FAQ
1.How can I place an order for HZU4.7B2TRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU4.7B2TRF-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 HZU4.7B2TRF-E reliable?
The price and inventory of HZU4.7B2TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU4.7B2TRF-E is usually 5 days.
3.What payment methods are accepted for HZU4.7B2TRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU4.7B2TRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU4.7B2TRF-E?
HZU4.7B2TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU4.7B2TRF-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 HZU4.7B2TRF-E?
For technical support, including HZU4.7B2TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU4.7B2TRF-E requirements.
6.How does Aetrix verify that HZU4.7B2TRF-E is sourced from the original manufacturer or authorized distributors?
All HZU4.7B2TRF-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 HZU4.7B2TRF-E meets industry standards.
7.What is the process for return or replacement of HZU4.7B2TRF-E?
All HZU4.7B2TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU4.7B2TRF-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 HZU4.7B2TRF-E part is unused and in its original packaging.
Return procedure for HZU4.7B2TRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZU4.7B2TRF-E Tags
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