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Renesas HZ12HB1-E
- Part No.:
- HZ12HB1-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ12HB1-E.pdf
- Description:
- DIODE ZENER
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Inventory:6,500
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Product details
Overview
HZ12HB1-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 12.4 V to 12.9 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 reference voltage sources and low-drift sensor signal conditioning.
For engineers reviewing the HZ12HB1-E datasheet, HZ12HB1-E pinout, HZ12HB1-E application, or HZ12HB1-E equivalent, key selection criteria include its low-noise performance (≈1/3–1/10 of standard HZ series), tight zener voltage tolerance, DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.
Technical Context
The HZ12HB1-E operates as a two-terminal voltage reference device using silicon planar junction technology optimized for reduced flicker noise and stable reverse-bias conduction. Its zener voltage is specified at 0.5 mA test current with DC excitation, and it exhibits a positive temperature coefficient near 0.04 %/°C at ~12.6 V.
Designed for low-leakage, low-impedance regulation, the device maintains rd ≤ 80 Ω under defined bias conditions and supports stable operation up to 400 mW dissipation at Ta = 25°C, derating linearly above 25°C per the published power vs. ambient temperature curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.4 V min to 12.9 V max at IZ = 0.5 mA - defines precise regulation band for feedback loops requiring <±2% tolerance. |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load transients in reference designs. |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal design limit for PCB trace width and copper pour in compact regulators. |
| Junction Temperature (Tj) | 175°C max - enables operation in high-temperature industrial environments without derating-induced failure. |
| Reverse Leakage (IR) | 1 μA max at VR = 2.0 V - minimizes error current in high-impedance bias networks and sensor bridges. |
| 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 with orange body color and navy blue cathode band; total mass ≈ 0.13 g; dimensions per JEITA SC-40 standard (φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side terminal for reverse-bias connection | Connected to regulated output node; polarity marking critical for correct orientation in shunt regulator topology. |
| 2 (Anode) | Low-side terminal referenced to ground or common | Provides return path for zener current; must be tied to lowest potential point in the regulation loop. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | Diode noise level ≈1/3–1/10 that of standard HZ series - directly improves SNR in precision ADC references and op-amp biasing. |
| Tight zener voltage tolerance | ±0.25 V window (12.4–12.9 V) at 0.5 mA - reduces calibration overhead in factory-trimmed instrumentation systems. |
| Stable dynamic impedance | rd ≤ 80 Ω ensures predictable line/load regulation behavior in feedback-controlled power supplies. |
| High-temperature reliability | Rated for continuous operation up to Tj = 175°C - supports use in automotive engine control modules and industrial motor drives. |
| Low leakage current | IR ≤ 1 μA at 2.0 V reverse bias - preserves accuracy in high-resistance divider networks and battery-powered sensors. |
Applications
| High-Precision Reference Source | Low-Drift Sensor Signal Conditioning |
|---|---|
Use Scenario: Stable 12.6 V reference for 24-bit delta-sigma ADCs in metrology-grade data acquisition systems. IC Role / Device Role / Timing Role: Shunt-connected voltage reference providing fixed bias point for analog front-end amplifiers and DAC buffers. Use Value: Low dynamic resistance (80 Ω) and ultra-low noise suppress quantization uncertainty introduced by supply ripple and thermal drift. |
Use Scenario: Biasing bridge-based strain gauges in structural health monitoring nodes operating at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Low-leakage zener element establishing excitation voltage for Wheatstone bridge with >10 MΩ arm impedances. Use Value: Reverse leakage ≤1 μA prevents offset error accumulation in high-impedance sensing paths over extended temperature ranges. |
| Industrial Power Supply Feedback | Automotive Engine Control Module Reference |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters powering PLC I/O modules. IC Role / Device Role / Timing Role: Zener-clamped optocoupler input to regulate output voltage via TL431-like feedback architecture. Use Value: 400 mW power rating and 175°C junction temperature enable robust operation under sustained overload and thermal cycling. |
Use Scenario: On-board reference for knock sensor signal processing in gasoline direct injection ECUs exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Temperature-stable voltage reference for analog comparator thresholds detecting combustion anomalies. Use Value: Positive tempco (~0.04 %/°C) and DO-35 mechanical ruggedness support repeatable trigger points across −40°C to +150°C operational envelope. |
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 | Zener voltage 12 V ±5%, rd = 9 Ω typical but higher noise; DO-41 package (larger footprint, higher thermal mass) | Higher noise floor limits use in sub-16-bit precision systems; better suited for general-purpose regulation where cost dominates | Select only if board space allows DO-41 and noise sensitivity is not critical; verify layout thermal relief for 1N4742A's higher Pd derating slope |
| BZX84-C12 | Zener voltage 12 V ±5%, SOT-23 package, rd = 30 Ω typical, IR = 100 nA @ 8 V - lower leakage but smaller power rating (300 mW) | SMT-only fit; unsuitable for high-power or high-temp through-hole designs; limited to surface-mount consumer electronics | Choose when automated assembly and board density are priorities; avoid in industrial/high-temp environments due to 150°C Tj limit |
Compared with 1N4742A and BZX84-C12, the HZ12HB1-E delivers superior low-noise performance and tighter voltage tolerance in a proven DO-35 package, making it optimal for high-reliability analog reference designs where thermal stability and measurement integrity are non-negotiable.
Availability
HZ12HB1-E is available at Aetrix Electronics and suitable for precision voltage reference, low-drift sensor biasing, and industrial power supply feedback applications requiring stable component supply, long-term parametric consistency, and RoHS-compliant sourcing.
Supply support for HZ12HB1-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 leader specializing in microcontrollers, analog power devices, and high-reliability discrete components 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 - targeting instrumentation, sensor interfaces, and regulated power supplies demanding minimal drift and repeatable zener characteristics.
FAQ
What is the exact zener voltage range for HZ12HB1-E?
The HZ12HB1-E has a guaranteed zener voltage range of 12.4 V minimum to 12.9 V maximum when tested at IZ = 0.5 mA DC. This 0.5 V window reflects the "B" grade tolerance within the HZ12xxL family and is confirmed in the Renesas REJ03G0182-0300 datasheet, page 3. The HZ12HB1-E achieves this specification using silicon planar junction technology optimized for low drift and reproducible breakdown characteristics.
Is HZ12HB1-E compatible with standard DO-35 footprints?
Yes, the HZ12HB1-E uses the JEITA-standard DO-35 package (Renesas code GRZZ0002ZB-A), matching mechanical dimensions φD = 2.0 mm, L = 26.0 mm, and E = 4.2 mm. Its axial leads and orange body with navy blue cathode band conform fully to legacy DO-35 layouts, enabling drop-in replacement in existing through-hole designs without PCB modification.
How does the noise performance of HZ12HB1-E compare to generic Zener diodes?
The HZ12HB1-E delivers approximately 1/3 to 1/10 the noise level of standard HZ-series Zeners, as stated in the official Renesas datasheet features section. This reduction stems from proprietary silicon planar processing and optimized junction geometry - directly measurable as lower flicker (1/f) noise in precision reference circuits where HZ12HB1-E replaces conventional parts like 1N4742A in low-SNR-sensitive stages.
What is the maximum allowable reverse current before degradation of HZ12HB1-E?
The HZ12HB1-E is rated for continuous operation up to its absolute maximum power dissipation of 400 mW at Ta = 25°C. At its nominal VZ ≈ 12.6 V, this corresponds to a maximum average zener current of ~31.7 mA. Exceeding this value - especially without thermal derating - risks junction overheating and permanent parameter shift; the datasheet specifies no safe continuous IZ beyond the Pd-limited boundary.
Does HZ12HB1-E have a specified temperature coefficient?
Yes, the HZ12HB1-E exhibits a zener voltage temperature coefficient (γZ) of approximately +0.04 %/°C near 12.6 V, as shown in Figure 2 of the Renesas datasheet. This positive, low-magnitude coefficient enables predictable voltage drift over temperature and supports stable operation in unregulated environments - a key differentiator versus higher-coefficient alternatives like 1N4742A (+0.07 %/°C typical).
HZ12HB1-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:
- -
HZ12HB1-E FAQ
1.How can I place an order for HZ12HB1-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ12HB1-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 HZ12HB1-E reliable?
The price and inventory of HZ12HB1-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ12HB1-E is usually 5 days.
3.What payment methods are accepted for HZ12HB1-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ12HB1-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ12HB1-E?
HZ12HB1-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ12HB1-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 HZ12HB1-E?
For technical support, including HZ12HB1-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ12HB1-E requirements.
6.How does Aetrix verify that HZ12HB1-E is sourced from the original manufacturer or authorized distributors?
All HZ12HB1-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 HZ12HB1-E meets industry standards.
7.What is the process for return or replacement of HZ12HB1-E?
All HZ12HB1-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ12HB1-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 HZ12HB1-E part is unused and in its original packaging.
Return procedure for HZ12HB1-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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