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Renesas HZ4BLLTD-E
- Part No.:
- HZ4BLLTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
HZ4BLLTD-E.pdf
- Description:
- DIODE ZENER 3.9V 250MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZ4BLLTD-E from Renesas Electronics is a silicon planar Zener diode optimized for hard-knee, low-noise voltage reference applications at low currents (1 nA to 1 mA), with a nominal zener voltage of 3.9 V (min 3.7 V, max 4.1 V), dynamic impedance of 370 Ω at IZT = 2.0 mA, and temperature coefficient of –0.02 mV/°C - used in precision analog front-ends and sensor biasing circuits.
For engineers reviewing the HZ4BLLTD-E datasheet, HZ4BLLTD-E pinout, HZ4BLLTD-E application, or HZ4BLLTD-E equivalent, this page delivers verified electrical specs, DO-35 package details, cathode/anode terminal mapping, low-current noise performance data, and direct alternative options for voltage reference design validation.
Technical Context
The HZ4BLLTD-E implements a hard-knee Zener breakdown structure with semi-logarithmic VZ–IZ linearity from 1 nA to 1 mA, enabling stable reference generation where conventional Zeners exhibit excessive knee softness. Its low dynamic impedance (370 Ω typ. at 2 mA) and ultra-low noise support high-accuracy DC sensing.
Designed for operation at low test currents (IZK = 0.5 µA max, IZT = 2.0 mA), it achieves tighter voltage tolerance (±0.2 V) and reduced temperature drift (–0.02 mV/°C) versus standard Zeners - critical for battery-powered instrumentation and calibration circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.7 V min to 4.1 V max at IZ = 0.5 mA - defines tight 3.9 V nominal reference with ±5.1% tolerance for stable low-power biasing. |
| Dynamic Impedance (ZZT) | 370 Ω typical at IZT = 2.0 mA - ensures minimal output voltage shift under load variation in precision references. |
| Reverse Current (IR) | ≤100 nA at VR = 1.0 V - enables ultra-low leakage in high-impedance feedback networks and energy-harvesting circuits. |
| Temperature Coefficient (γZ) | –0.02 mV/°C - delivers near-zero drift over industrial temperature range, reducing calibration burden in portable test gear. |
| Power Dissipation (Pd) | 250 mW maximum - supports continuous operation in DO-35 packages without forced cooling in ambient ≤70°C. |
| Junction Temperature (Tj) | 175°C maximum - allows reliable operation in thermally constrained PCB layouts and sealed enclosures. |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A, Renesas code SC-40), glass axial leaded case with navy blue cathode band and verdure body color. Mass: 0.13 g. Dimensions: φD = 2.0 mm max, L = 26.0 mm min, E = 4.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference output | Connected to regulated node; polarity must be observed to avoid reverse conduction failure. |
| 2 (Anode) | Reference ground return | Serves as current sink path; requires low-impedance connection to system ground for stable regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Hard-knee breakdown | VZ–IZ curve exhibits sharp transition at ~0.05 mA, minimizing uncertainty in low-current reference points. |
| Low-noise operation | Approximately 1/10 lower noise than standard Zeners in 1 nA–1 mA region - improves SNR in ADC reference buffers. |
| Semi-logarithmic linearity | ∆VZ1 = 0.5 V max (0.05 mA → 0.5 mA), ∆VZ2 = 0.6 V max (0.001 mA → 0.05 mA) - enables predictable scaling across decades of current. |
| Low-temperature coefficient | –0.02 mV/°C at 3.9 V - reduces thermal drift to <0.2 mV over 0°C–70°C, eliminating need for external compensation. |
Applications
| Portable Multimeter Reference | Thermocouple Cold-Junction Compensation |
|---|---|
Use Scenario: Battery-powered handheld multimeter requiring stable 3.9 V reference for 16-bit ADC full-scale calibration. IC Role / Device Role / Timing Role: Precision voltage reference diode providing low-drift, low-noise DC bias to ADC reference input. Use Value: Enables ±0.05% measurement accuracy over –10°C to +50°C without trimming, leveraging –0.02 mV/°C TC and 370 Ω ZZT. | Use Scenario: Industrial temperature transmitter using K-type thermocouple with cold-junction compensation in microcontroller-based signal chain. IC Role / Device Role / Timing Role: Low-current Zener reference supplying stable bias to op-amp circuit measuring thermistor voltage. Use Value: Delivers <100 nA leakage at 1 V reverse bias, preventing error injection into high-impedance thermistor bridge. |
| Medical Sensor Signal Conditioning | IoT Node Voltage Monitoring |
Use Scenario: Wearable ECG front-end requiring ultra-low-noise 3.9 V reference for amplifier gain-setting resistors. IC Role / Device Role / Timing Role: Low-noise Zener diode establishing precision bias point for rail-to-rail op-amps in analog signal path. Use Value: Achieves 1/10 noise vs. standard Zeners, directly improving input-referred noise floor below 1 µVRMS. | Use Scenario: LPWAN sensor node monitoring Li-ion battery voltage via MCU ADC with minimal quiescent current budget. IC Role / Device Role / Timing Role: Low-power Zener reference operating at 100 nA–1 µA to enable accurate battery state-of-charge estimation. Use Value: Maintains 3.9 V regulation down to 0.5 µA IZK, supporting wake-up ADC sampling without dedicated LDO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5226BRLG | Zener voltage 3.3 V (±5%), higher ZZT = 600 Ω, TC = +2 mV/°C - less stable at low current. | Acceptable for general-purpose 3.3 V biasing but unsuitable for sub-1 µA precision references. | Select only when cost sensitivity outweighs drift/noise requirements and 3.3 V suffices. |
| BZX55C3V9 | Zener voltage 3.9 V (±5%), ZZT = 90 Ω at 5 mA, but IR = 1 µA at 1 V - 10× higher leakage than HZ4BLLTD-E. | Functional in power supply feedback loops but degrades high-Z sensor interfaces due to leakage-induced offset. | Prefer only in non-critical, higher-current (>1 mA) regulation where leakage is not a factor. |
Compared with 1N5226BRLG and BZX55C3V9, the HZ4BLLTD-E provides superior low-current stability (0.5 µA IZK), lower noise, and near-zero TC - making it uniquely suited for battery-operated precision analog systems where reference integrity dominates power or cost constraints.
Availability
HZ4BLLTD-E is available at Aetrix Electronics and suitable for portable instrumentation, medical sensor modules, IoT battery monitoring, and industrial temperature transmitters requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for HZ4BLLTD-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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and consumer applications.
The HZ-LL Series was designed specifically for low-noise, hard-knee Zener reference applications demanding high linearity and ultra-low drift at microamp-level currents - targeting precision analog signal chains in portable and battery-constrained systems.
FAQ
What is the nominal zener voltage of the HZ4BLLTD-E and its tolerance range?
The HZ4BLLTD-E has a nominal zener voltage of 3.9 V, with a guaranteed range of 3.7 V to 4.1 V at IZ = 0.5 mA. This ±0.2 V tolerance supports precision biasing in analog circuits where tight DC reference stability is required without post-manufacturing trimming. The HZ4BLLTD-E achieves this via a hard-knee Zener structure optimized for low-current operation.
Does the HZ4BLLTD-E support operation at very low reverse currents, and what is its minimum specified test current?
Yes, the HZ4BLLTD-E is characterized down to 1 nA and specifies IZK (knee current) ≤ 0.5 µA - enabling stable regulation in ultra-low-power applications such as energy-harvesting sensors and wake-up ADC references. Its semi-logarithmic VZ–IZ behavior remains linear from 1 nA to 1 mA, a key differentiator from standard Zeners. This capability is intrinsic to the HZ4BLLTD-E's planar silicon process.
What is the dynamic impedance of the HZ4BLLTD-E, and why does it matter for reference stability?
The HZ4BLLTD-E has a typical dynamic impedance (ZZT) of 370 Ω at IZT = 2.0 mA. This value determines how much the output voltage shifts under varying load current - lower ZZT means better regulation. At 370 Ω, the HZ4BLLTD-E delivers <0.74 mV shift per 2 µA load change, critical for maintaining ADC reference accuracy in noisy or dynamically loaded systems. This spec is measured and guaranteed for the HZ4BLLTD-E.
Is the HZ4BLLTD-E RoHS compliant and suitable for industrial temperature ranges?
Yes, the HZ4BLLTD-E meets RoHS Directive requirements and is rated for operation across –55°C to +175°C storage and 0°C to +70°C ambient operating range. Its junction temperature limit is 175°C, and its temperature coefficient of –0.02 mV/°C ensures minimal drift in industrial environments. Renesas documents confirm this compliance and rating for the HZ4BLLTD-E in the REJ03G0183-0300 datasheet.
How is the cathode identified on the HZ4BLLTD-E DO-35 package?
The cathode of the HZ4BLLTD-E is marked by a navy blue band on the glass DO-35 body, consistent with Renesas' HZ-LL Series packaging standard. Pin 1 (cathode) is the lead adjacent to this band; Pin 2 (anode) is the opposite lead. The body color is verdure (greenish), and mechanical dimensions match JEITA code GRZZ0002ZB-A - all confirmed for the HZ4BLLTD-E in the official Renesas datasheet.
HZ4BLLTD-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5.13%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 370 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
HZ4BLLTD-E FAQ
1.How can I place an order for HZ4BLLTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ4BLLTD-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 HZ4BLLTD-E reliable?
The price and inventory of HZ4BLLTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ4BLLTD-E is usually 5 days.
3.What payment methods are accepted for HZ4BLLTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ4BLLTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ4BLLTD-E?
HZ4BLLTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ4BLLTD-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 HZ4BLLTD-E?
For technical support, including HZ4BLLTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ4BLLTD-E requirements.
6.How does Aetrix verify that HZ4BLLTD-E is sourced from the original manufacturer or authorized distributors?
All HZ4BLLTD-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 HZ4BLLTD-E meets industry standards.
7.What is the process for return or replacement of HZ4BLLTD-E?
All HZ4BLLTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ4BLLTD-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 HZ4BLLTD-E part is unused and in its original packaging.
Return procedure for HZ4BLLTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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