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Renesas HZ20-1LTD-E
- Part No.:
- HZ20-1LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ20-1LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZ20-1LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 18.8–19.7 V at 0.5 mA test current, 100 Ω dynamic resistance, 400 mW power dissipation, and DO-35 glass package with navy-blue cathode band. It serves as a stable voltage clamp in low-drift power supply feedback paths and sensor biasing networks.
For engineers reviewing the HZ20-1LTD-E datasheet, HZ20-1LTD-E pinout, HZ20-1LTD-E application, or HZ20-1LTD-E equivalent, this device is selected for its verified low noise (≈1/3–1/10 of standard HZ series), tight zener voltage tolerance, and thermal stability across −55°C to +175°C storage range - critical for industrial instrumentation and high-reliability analog signal conditioning.
Technical Context
The HZ20-1LTD-E operates as a two-terminal voltage reference using silicon planar junction technology, with zener breakdown mechanism dominant in its 19 V range. Its low dynamic impedance (100 Ω max at 0.5 mA) ensures minimal output voltage variation under load transients, while its −0.04 %/°C temperature coefficient near 19 V enables predictable drift behavior in ambient-varying environments.
Designed for DC-stabilized operation, it exhibits reverse leakage current ≤1 μA at VR = 15 V and junction temperature up to 175°C. The DO-35 package supports through-hole mounting on FR-phenolic PCBs with 2.5 mm lead spacing, and its 0.13 g mass aligns with JEITA SC-40 / Renesas GRZZ0002ZB-A mechanical specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–19.7 V at IZ = 0.5 mA - defines stable clamping threshold for feedback loops and reference nodes. |
| Dynamic Resistance (rd) | ≤100 Ω at IZ = 0.5 mA - ensures minimal output voltage shift under small-signal current variations. |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling before thermal derating applies. |
| Junction Temperature (Tj) | −55°C to +175°C - supports operation in extended industrial and automotive under-hood environments. |
| Reverse Leakage Current (IR) | ≤1 μA at VR = 15 V - guarantees low error contribution in high-impedance reference paths. |
| Temperature Coefficient (γZ) | ≈−0.04 %/°C near 19 V - enables predictable, low-drift voltage reference behavior over temperature. |
Pinout & Package
Package: DO-35 glass axial-leaded package per JEITA SC-40 / Renesas GRZZ0002ZB-A, with navy-blue cathode band and orange body color; leads spaced 2.5 mm apart, total length 26 mm, diameter 2.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side terminal for reverse-biased operation | Connected to regulated node or op-amp inverting input; polarity must be observed to maintain zener conduction. |
| 2 (Anode) | Low-side terminal, common reference point | Tied to ground or circuit return path; establishes reference potential for voltage regulation or clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | Diode noise level ≈1/3–1/10 that of standard HZ series - reduces RMS noise in precision reference and audio bias circuits. |
| Stable low-impedance regulation | Dynamic resistance ≤100 Ω at 0.5 mA - maintains tight voltage control during small-signal load changes. |
| Wide operating temperature range | Junction rating up to +175°C - enables use in thermally demanding industrial enclosures and power supplies. |
| Controlled zener voltage tolerance | ±0.45 V (≈2.4%) at 19.25 V nominal - supports accurate calibration without post-trim in mid-precision applications. |
| Low reverse leakage | ≤1 μA at 15 V reverse bias - minimizes current error in high-Z feedback networks and battery-powered references. |
Applications
| Industrial Power Supply Feedback | High-Voltage Sensor Biasing |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 19 V threshold to TL431-like shunt regulator or comparator input. Use Value: Enables ±1% output regulation accuracy over line/load/temperature with minimal external components. |
Use Scenario: Providing stable bias voltage to piezoresistive pressure sensors operating at 18–20 V full-scale range. IC Role / Device Role / Timing Role: Low-noise voltage reference source for ratiometric excitation and ADC reference scaling. Use Value: Reduces measurement noise floor by >10 dB compared to standard HZ-series diodes in bridge sensor interfaces. |
| Audio Equipment DC Rail Clamping | Test & Measurement Reference Divider |
|
Use Scenario: Clamping positive rail overshoot in Class-AB amplifier power stages during transient load switching. IC Role / Device Role / Timing Role: Fast-response overvoltage protection element absorbing surge energy without latch-up. Use Value: Limits rail excursion to ≤19.7 V with <100 ns response, preventing op-amp saturation and output stage damage. |
Use Scenario: Constructing calibrated 19 V reference node in multimeter front-end attenuator and ADC reference chains. IC Role / Device Role / Timing Role: Primary voltage standard traceable to factory-tested zener voltage binning (HZ20-1L). Use Value: Delivers long-term stability <±0.1%/1000 hrs and low hysteresis for metrology-grade voltage division. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A (ON Semiconductor) | Zener voltage 12 V, 1000 mW rating, higher noise, TO-204AA (DO-41) package | Higher power but lower voltage; unsuitable for 19 V reference; requires layout change for larger package | Select only if 12 V reference and higher Pd are required; not a drop-in replacement for HZ20-1LTD-E. |
| BZX84-C18LT1G (onsemi) | 18 V nominal, SOT-23 surface-mount, 300 mW, higher rd (≈150 Ω), higher leakage (≤5 μA) | SMT-compatible but lacks low-noise performance and thermal robustness of DO-35 glass package | Use for space-constrained PCBs where 18 V tolerance and reflow assembly are prioritized over noise and stability. |
Compared with 1N4742A and BZX84-C18LT1G, the HZ20-1LTD-E delivers superior low-noise operation, tighter 19 V regulation, and extended temperature capability in a rugged axial package - making it preferred for precision industrial and test equipment where reference integrity is critical.
Availability
HZ20-1LTD-E is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, audio rail protection, and test equipment requiring stable component supply with consistent parametric binning and long-lifecycle support.
Supply support for HZ20-1LTD-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 specializing in microcontrollers, analog, power, 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 industrial instrumentation and precision analog systems - emphasizing reduced diode noise, tight zener voltage tolerance, and extended thermal reliability.
FAQ
What is the zener voltage range of the HZ20-1LTD-E?
The HZ20-1LTD-E has a specified zener voltage range of 18.8 V to 19.7 V when tested at IZ = 0.5 mA and Ta = 25°C. This 0.9 V span reflects factory binning for the "-1L" variant and ensures predictable clamping behavior in feedback and reference circuits without requiring external trimming.
Does the HZ20-1LTD-E support high-temperature operation?
Yes, the HZ20-1LTD-E is rated for junction temperatures up to +175°C and storage temperatures from −55°C to +175°C. Its silicon planar construction and DO-35 glass package enable reliable operation in industrial control cabinets, motor drive power stages, and under-hood automotive modules where ambient temperatures exceed 100°C.
How does the noise performance of HZ20-1LTD-E compare to standard Zener diodes?
The HZ20-1LTD-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to optimized junction geometry and low-defect silicon processing. This makes the HZ20-1LTD-E especially valuable in low-level sensor biasing, audio preamplifier references, and high-resolution data acquisition systems where voltage reference noise directly impacts SNR.
What is the maximum power dissipation for HZ20-1LTD-E?
The HZ20-1LTD-E has a maximum power dissipation of 400 mW at Ta = 25°C. Derating is required above 25°C ambient - approximately 3.2 mW/°C - down to zero dissipation at +175°C junction temperature. This rating supports continuous DC operation in compact heatsink-free designs with adequate PCB copper area.
Is the HZ20-1LTD-E RoHS compliant?
Yes, the HZ20-1LTD-E complies with the EU RoHS Directive and contains no restricted substances above allowable thresholds. Renesas Electronics confirms environmental compliance for this part in accordance with applicable regulations, including lead-free termination and halogen-free packaging materials per industry-standard qualification testing.
HZ20-1LTD-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:
- -
HZ20-1LTD-E FAQ
1.How can I place an order for HZ20-1LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ20-1LTD-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 HZ20-1LTD-E reliable?
The price and inventory of HZ20-1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ20-1LTD-E is usually 5 days.
3.What payment methods are accepted for HZ20-1LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ20-1LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ20-1LTD-E?
HZ20-1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ20-1LTD-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 HZ20-1LTD-E?
For technical support, including HZ20-1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ20-1LTD-E requirements.
6.How does Aetrix verify that HZ20-1LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ20-1LTD-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 HZ20-1LTD-E meets industry standards.
7.What is the process for return or replacement of HZ20-1LTD-E?
All HZ20-1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ20-1LTD-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 HZ20-1LTD-E part is unused and in its original packaging.
Return procedure for HZ20-1LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ20-1LTD-E Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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