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Renesas HZ18BPTK-E
- Part No.:
- HZ18BPTK-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ18BPTK-E.pdf
- Description:
- DIODE ZENER 18V 1W
- Quantity:
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Inventory:15,000
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Product details
Overview
HZ18BPTK-E from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 17.5 V to 18.3 V, dynamic resistance of 80 Ω at 0.5 mA test current, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C - deployed in stabilized reference supplies for instrumentation and sensor signal conditioning.
For engineers reviewing the HZ18BPTK-E datasheet, HZ18BPTK-E pinout, HZ18BPTK-E application, or HZ18BPTK-E equivalent, key selection criteria include its low-noise performance (1/3–1/10 lower than standard HZ series), tight zener voltage tolerance, DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.
Technical Context
This device operates as a two-terminal voltage reference using controlled avalanche breakdown in a silicon planar junction. Its low dynamic impedance (80 Ω) and low leakage support stable regulation under light-load conditions typical in high-impedance bias networks and precision op-amp references.
The HZ18BPTK-E exhibits a zener voltage temperature coefficient near zero (±0.02%/°C typical per family data), enabling minimal drift over ambient variations. It is rated for DC operation only and requires derating above 25°C per the published power vs. temperature curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.5 V min to 18.3 V max at IZ = 0.5 mA - defines stable reference point for feedback loops requiring ±2.3% tolerance. |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under small-signal load changes. |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling. |
| Junction Temperature (Tj) | 175°C max - enables use in high-temperature industrial environments when mounted with adequate thermal relief. |
| Reverse Leakage (IR) | 1 μA max at VR = 15.0 V - preserves accuracy in high-impedance reference dividers and low-power standby circuits. |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - industry-standard axial leaded glass package with orange body and navy-blue cathode band. |
Pinout & Package
Package: DO-35 glass axial-leaded package (Renesas code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, 0.13 g mass, orange body with navy-blue cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to higher-potential node; reverse-biased operation requires positive voltage applied here relative to anode. |
| 2 (Anode) | Reference ground terminal | Typically tied to circuit common; establishes reference potential for regulated output derived from cathode side. |
Key Features
| Feature | Design Value |
|---|---|
| Noise level | Approximately 1/3–1/10 that of standard HZ-series diodes - directly improves SNR in low-level analog front-ends. |
| Zener impedance | 80 Ω max at 0.5 mA - enables tighter regulation under varying load currents in unregulated supply rails. |
| Voltage range coverage | Part of HZ-L family spanning 5.2 V to 38 V - allows standardized sourcing across multiple reference voltage tiers. |
| Thermal stability | Near-zero temperature coefficient (~±0.02%/°C) near 18 V - minimizes drift-induced error in temperature-sensitive measurement systems. |
Applications
| Instrumentation Reference Supply | Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable excitation voltage for strain gauge bridges and RTD interfaces in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise voltage reference source establishing precise bias points for differential amplifiers and ADC drivers. Use Value: Enables sub-0.1% full-scale accuracy by suppressing noise-induced offset drift in microvolt-level bridge outputs. |
Use Scenario: Biasing photodiode transimpedance amplifiers in optical smoke detectors and environmental CO₂ sensors. IC Role / Device Role / Timing Role: Low-leakage, low-impedance reference node stabilizing amplifier input common-mode voltage. Use Value: Reduces dark-current uncertainty and improves dynamic range by maintaining <1 μA reverse leakage across temperature extremes. |
| Industrial PLC Analog Input Module | Medical Vital Sign Monitor Power Rail |
Use Scenario: Generating calibrated reference voltages for 16-bit SAR ADCs in programmable logic controller analog input cards. IC Role / Device Role / Timing Role: Precision shunt regulator anchoring internal DAC output buffers and multiplexer reference paths. Use Value: Maintains ±0.05% linearity over 0–70°C via low tempco and 80 Ω impedance, meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Stabilizing isolated auxiliary supplies for ECG front-end amplifiers and pulse oximeter LED drivers. IC Role / Device Role / Timing Role: Low-noise, medical-grade voltage clamp ensuring signal integrity in battery-powered patient-connected devices. Use Value: Complies with IEC 60601-1 creepage/clearance and leakage current limits due to DO-35 glass encapsulation and 1 μA max IR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | Zener voltage 15 V (±5%), rd = 14 Ω, Pd = 1 W, DO-41 package - higher power but wider tolerance and no low-noise specification. | Used in general-purpose power supply regulation where noise is non-critical and board space permits larger DO-41 footprint. | Select only if 15 V reference suffices and thermal margin exceeds 400 mW requirement; not suitable for precision analog sensing. |
| BZX84-C18 | Zener voltage 18 V (±5%), rd = 40 Ω, Pd = 300 mW, SOT-23 package - surface-mount, lower power, no documented low-noise performance. | Preferred for space-constrained digital systems requiring automated assembly, but lacks HZ-L series noise reduction and thermal robustness. | Choose for cost-sensitive consumer electronics where 18 V nominal is acceptable and noise floor >10× higher is tolerable. |
Compared with 1N4744A and BZX84-C18, the HZ18BPTK-E delivers superior noise performance and tighter voltage tolerance in a rugged DO-35 package, making it uniquely suited for metrology-grade references where signal integrity outweighs package size or power headroom.
Availability
HZ18BPTK-E is available at Aetrix Electronics and suitable for instrumentation reference supplies, sensor signal conditioning, industrial PLC analog input modules, and medical vital sign monitor power rails requiring stable component supply with traceable sourcing and long-term lifecycle continuity.
Supply support for HZ18BPTK-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 specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and infrastructure markets.
The HZ-L series was developed specifically for low-noise, high-stability voltage reference applications in precision analog systems - emphasizing reduced diode noise, tight zener voltage control, and extended thermal operating range.
FAQ
What is the exact zener voltage range specified for HZ18BPTK-E?
The HZ18BPTK-E has a guaranteed zener voltage range of 17.5 V minimum to 18.3 V maximum when tested at IZ = 0.5 mA and Ta = 25°C. This 0.8 V span reflects the device's grade B tolerance within the HZ-L family and is confirmed in the Electrical Characteristics table on page 3 of REJ03G0182-0300 Rev.3.00. The HZ18BPTK-E must be operated within this range to meet its specified dynamic resistance and temperature coefficient performance.
Is HZ18BPTK-E suitable for AC-coupled or transient suppression applications?
No, the HZ18BPTK-E is rated for DC operation only, as explicitly stated in the datasheet notes. It is not characterized for surge handling, peak reverse power, or AC waveform clipping. Its design intent is stable DC voltage reference generation - using HZ18BPTK-E in AC or transient roles risks exceeding absolute maximum ratings and invalidates its low-noise and low-impedance specifications. For transient suppression, TVS diodes such as P6KE18A are appropriate alternatives.
Does HZ18BPTK-E have a specified temperature coefficient, and how does it impact accuracy?
Yes, the HZ-L family including HZ18BPTK-E exhibits a zener voltage temperature coefficient near zero - approximately ±0.02%/°C based on Figure 2 in the datasheet. At 18 V nominal, this translates to ±3.6 mV/°C drift, significantly lower than standard Zeners. This low tempco ensures reference stability across industrial temperature ranges, directly supporting sub-0.1% total error budgets in precision measurement systems where HZ18BPTK-E is deployed.
Can HZ18BPTK-E be used in parallel for higher current capability?
No - paralleling HZ18BPTK-E units is not recommended due to manufacturing variations in zener voltage and dynamic resistance, which cause current imbalance and thermal runaway. Each HZ18BPTK-E must be individually biased with a series resistor sized for its specific VZ and desired IZ. For higher current needs, consider discrete transistor-based shunt regulators or integrated voltage references like REF5018, not parallel Zener configurations.
What is the cathode identification method for HZ18BPTK-E?
The cathode of HZ18BPTK-E is marked by a navy-blue band on the orange glass DO-35 body, consistent with Renesas' HZ-L series packaging standard. Pin 1 (cathode) is the lead adjacent to this band; Pin 2 (anode) is the opposite lead. This marking aligns with JEITA package code GRZZ0002ZB-A and is verified in the "Pin Arrangement" diagram on page 1 of the datasheet. Correct polarity is essential to avoid forward conduction and ensure proper zener regulation.
HZ18BPTK-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:
- -
HZ18BPTK-E FAQ
1.How can I place an order for HZ18BPTK-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ18BPTK-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 HZ18BPTK-E reliable?
The price and inventory of HZ18BPTK-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ18BPTK-E is usually 5 days.
3.What payment methods are accepted for HZ18BPTK-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ18BPTK-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ18BPTK-E?
HZ18BPTK-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ18BPTK-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 HZ18BPTK-E?
For technical support, including HZ18BPTK-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ18BPTK-E requirements.
6.How does Aetrix verify that HZ18BPTK-E is sourced from the original manufacturer or authorized distributors?
All HZ18BPTK-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 HZ18BPTK-E meets industry standards.
7.What is the process for return or replacement of HZ18BPTK-E?
All HZ18BPTK-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ18BPTK-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 HZ18BPTK-E part is unused and in its original packaging.
Return procedure for HZ18BPTK-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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