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Renesas HZ30-1LTD-E
- Part No.:
- HZ30-1LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ30-1LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:22,500
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Product details
Overview
HZ30-1LTD-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 28.2–29.6 V at 0.5 mA, 400 mW power dissipation, 27 Ω dynamic impedance, and DO-35 glass package with navy-blue cathode band.
For engineers reviewing the HZ30-1LTD-E datasheet, HZ30-1LTD-E pinout, HZ30-1LTD-E application, or HZ30-1LTD-E equivalent, this device serves as a noise-critical voltage reference in regulated power supplies, sensor excitation circuits, and instrumentation front-ends where low zener impedance and stable temperature coefficient are essential.
Technical Context
The HZ30-1LTD-E employs a silicon planar junction structure to achieve reduced noise-approximately 1/3 to 1/10 that of standard HZ-series diodes-and low leakage current (<1 μA at VR = 20.2 V). Its zener voltage is specified under DC test conditions (IZ = 0.5 mA), with a typical temperature coefficient of −0.06 %/°C near 30 V.
Designed for operation within Ta = 25°C ambient, it maintains stable regulation up to 175°C junction temperature and supports continuous reverse-bias operation with thermal derating per Fig.3. The DO-35 package enables through-hole mounting on FR-4 or paper-phenol PCBs with 2.5 mm lead spacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.2–29.6 V at IZ = 0.5 mA - defines stable reference point for feedback loops and biasing networks |
| Dynamic Impedance (rd) | 27 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous reverse power handling before thermal shutdown |
| Reverse Leakage (IR) | ≤1 μA at VR = 20.2 V - guarantees negligible current draw in standby or high-impedance reference nodes |
| Junction Temperature (Tj) | −55 to +175°C - enables use in industrial environments with wide ambient swings and localized heating |
| Noise Level | ≈1/3–1/10 of HZ-series - directly improves SNR in precision ADC references and low-level signal conditioning |
Pinout & Package
Package: DO-35 glass axial-leaded package (RENESAS code GRZZ0002ZB-A, JEITA SC-40), orange body with navy-blue cathode band; 2.0 mm diameter, 26.0 mm overall length, 0.5 mm lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-impedance reference node | Connected to regulated output or op-amp inverting input; polarity must be observed to avoid forward conduction |
| 2 (Anode) | Ground or current sink | Biased via series resistor to establish IZ; provides return path for zener current in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | Reduces broadband voltage noise by factor of 3–10 vs. legacy HZ series, critical for 16-bit+ data acquisition systems |
| Stable temperature coefficient | −0.06 %/°C near 30 V minimizes drift-induced error in temperature-varying environments |
| Low dynamic impedance | 27 Ω max ensures <1 mV output shift per 1 mA load change-ideal for driving op-amp inputs or DAC references |
| High reliability glass package | DO-35 construction provides hermetic sealing and long-term parameter stability under humidity and thermal cycling |
| Wide operating temperature range | −55°C to +175°C junction rating supports deployment in automotive engine control units and industrial motor drives |
Applications
| Industrial Power Monitoring | Medical Sensor Excitation |
|---|---|
Use Scenario: High-accuracy AC/DC converter feedback in programmable power supplies monitoring grid voltage fluctuations. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 29 V threshold for error amplifier comparison. Use Value: Low dynamic impedance (27 Ω) prevents loop gain degradation; low noise avoids false triggering in RMS measurement circuits. |
Use Scenario: Exciting resistive bridge sensors (e.g., strain gauges) in portable ECG front-end modules. IC Role / Device Role / Timing Role: Precision bias source delivering stable excitation voltage independent of supply ripple. Use Value: 1/3–1/10 lower noise than standard Zeners preserves microvolt-level signal integrity in biopotential amplification. |
| Test Equipment Reference | Automotive Engine Control |
Use Scenario: Calibration reference in handheld multimeters requiring traceable 30 V DC accuracy over temperature. IC Role / Device Role / Timing Role: Primary voltage standard against which ADC full-scale is adjusted during self-calibration. Use Value: Tight VZ tolerance (±0.7 V) and −0.06 %/°C TC enable ±0.1% absolute accuracy across −20°C to +70°C. |
Use Scenario: Regulating auxiliary 29 V rail for knock sensor signal conditioning in gasoline direct injection ECUs. IC Role / Device Role / Timing Role: Local shunt regulator supplying clean bias to piezoelectric sensor interface amplifiers. Use Value: DO-35 package withstands under-hood thermal cycling; 175°C Tj rating ensures reliability at 125°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5256BLT1G | Zener voltage 30 V ±5%, rd = 35 Ω, SOT-23 package, 200 mW Pd | SMT-compatible but lower power and higher impedance; unsuitable for >15 mA reference loads | Select when board space is constrained and load current ≤5 mA; verify thermal margin on FR-4. |
| Vishay BZX84-C30 | Zener voltage 30 V ±5%, rd = 30 Ω, SOT-23, 300 mW Pd, higher noise than HZ-L series | Lacks low-noise optimization; not recommended for sub-μV noise-sensitive instrumentation | Acceptable for general-purpose regulation where SNR > 80 dB is not required. |
Compared with MMBZ5256BLT1G and BZX84-C30, the HZ30-1LTD-E delivers superior noise performance and higher power handling in a through-hole package, making it preferred for legacy designs, high-reliability industrial systems, and analog signal chains demanding <100 nV/√Hz noise floor.
Availability
HZ30-1LTD-E is available at Aetrix Electronics and suitable for industrial power monitoring, medical sensor excitation, test equipment calibration, and automotive engine control applications requiring stable component supply and long-lifecycle support.
Supply support for HZ30-1LTD-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 precision analog systems-emphasizing reduced zener noise, tight VZ tolerance, and robust thermal performance.
FAQ
What is the zener voltage tolerance of HZ30-1LTD-E at 0.5 mA?
The HZ30-1LTD-E has a zener voltage range of 28.2 V to 29.6 V when tested at IZ = 0.5 mA and Ta = 25°C. This ±0.7 V tolerance corresponds to approximately ±2.4% of nominal 29 V, enabling predictable regulation without post-manufacturing trimming in most analog reference designs using the HZ30-1LTD-E.
Does HZ30-1LTD-E support operation above 100°C ambient temperature?
Yes, the HZ30-1LTD-E is rated for storage from −55°C to +175°C and operates with junction temperature up to 175°C. When mounted on standard FR-4 PCB with 10 mm lead length, its derated power dissipation remains sufficient for ambient temperatures up to 105°C-verified in Renesas' Fig.3 power vs. temperature curve-making the HZ30-1LTD-E suitable for under-hood or enclosed industrial environments.
How does the noise performance of HZ30-1LTD-E compare to standard Zener diodes?
The HZ30-1LTD-E achieves approximately 1/3 to 1/10 the broadband voltage noise of conventional HZ-series Zeners due to its optimized silicon planar junction process. This reduction directly improves signal-to-noise ratio in precision applications such as 24-bit delta-sigma ADC references or low-level sensor signal conditioning where the HZ30-1LTD-E serves as the primary voltage standard.
Is HZ30-1LTD-E RoHS compliant?
Yes, the HZ30-1LTD-E complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation. The DO-35 glass package contains no lead in solderable terminations, and all materials meet the restricted substance thresholds defined in Directive 2011/65/EU-critical for export-ready designs using the HZ30-1LTD-E.
Can HZ30-1LTD-E be used in series or parallel configurations?
The HZ30-1LTD-E is designed for single-device shunt regulation and is not characterized for parallel operation due to mismatched dynamic impedance and thermal runaway risk. In series configurations, cumulative voltage tolerance and temperature coefficient deviations must be calculated-Renesas recommends individual regulation per rail instead of cascading multiple HZ30-1LTD-E devices in one string.
HZ30-1LTD-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:
- -
HZ30-1LTD-E FAQ
1.How can I place an order for HZ30-1LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ30-1LTD-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 HZ30-1LTD-E reliable?
The price and inventory of HZ30-1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ30-1LTD-E is usually 5 days.
3.What payment methods are accepted for HZ30-1LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ30-1LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ30-1LTD-E?
HZ30-1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ30-1LTD-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 HZ30-1LTD-E?
For technical support, including HZ30-1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ30-1LTD-E requirements.
6.How does Aetrix verify that HZ30-1LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ30-1LTD-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 HZ30-1LTD-E meets industry standards.
7.What is the process for return or replacement of HZ30-1LTD-E?
All HZ30-1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ30-1LTD-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 HZ30-1LTD-E part is unused and in its original packaging.
Return procedure for HZ30-1LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ30-1LTD-E Tags
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