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Renesas HZ12B1LTA-E
- Part No.:
- HZ12B1LTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ12B1LTA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:45,000
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Product details
Overview
HZ12B1LTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 12.4–12.9 V at 0.5 mA test current, 80 Ω dynamic impedance, 400 mW power dissipation, and DO-35 glass package with navy-blue cathode band - used in reference supplies for ADCs, sensor signal conditioning, and low-drift bias networks.
For engineers reviewing the HZ12B1LTA-E datasheet, HZ12B1LTA-E pinout, HZ12B1LTA-E application, or HZ12B1LTA-E equivalent, key selection criteria include zener voltage tolerance (±0.5 V), temperature coefficient (−0.02 %/°C typical at ~12.6 V), low noise performance (≈1/3–1/10 of standard HZ series), and DO-35 mechanical compatibility in space-constrained PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon planar junction structure. Its low dynamic resistance (80 Ω max at IZ = 0.5 mA) and tight VZ tolerance support stable regulation under varying load conditions in low-current (<1 mA) applications.
The HZ12B1LTA-E exhibits a negative temperature coefficient near −0.02 %/°C, minimizing drift across −55°C to +175°C operating range. It is rated for 400 mW dissipation at TA = 25°C, derating linearly above 25°C per the published curve (e.g., ~200 mW at 75°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.4–12.9 V at IZ = 0.5 mA - defines stable reference point for biasing or feedback networks requiring ±0.5 V 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 at TA = 25°C - supports continuous operation in compact designs without forced cooling. |
| Reverse Leakage (IR) | 1 μA max at VR = 10.5 V - enables high-impedance node stabilization without significant error current. |
| Junction Temperature (Tj) | 175°C max - allows reliable operation in industrial environments with elevated ambient temperatures. |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - industry-standard axial glass package with 2.0 mm body diameter and 26 mm lead length. |
Pinout & Package
DO-35 glass axial package with orange body color and navy-blue cathode band. Cathode identified by band; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased terminal where zener breakdown occurs. |
| 2 (unbanded end) | Anode | Connected to circuit ground or lower-potential rail; completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise level ≈1/3–1/10 that of standard HZ series - critical for high-resolution data acquisition front-ends. |
| Tight zener voltage tolerance | ±0.5 V over 12.4–12.9 V range - reduces calibration burden in factory-trimmed reference designs. |
| Stable temperature coefficient | −0.02 %/°C typical near 12.6 V - enables predictable drift behavior in wide-temperature industrial sensors. |
| Low leakage current | ≤1 μA at 10.5 V reverse bias - preserves accuracy in high-impedance voltage divider or op-amp reference inputs. |
| Robust thermal rating | 175°C maximum junction temperature - supports use in sealed enclosures or near heat-generating components. |
Applications
| Industrial Sensor Signal Conditioning | High-Resolution ADC Reference Supply |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for strain gauge bridges in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Zener diode provides low-drift, low-noise 12.6 V reference for bridge bias and instrumentation amplifier gain-setting resistors. Use Value: Enables <10 ppm/°C system-level offset drift by minimizing reference voltage temperature coefficient contribution. |
Use Scenario: Generating precise reference voltage for 16-bit SAR ADCs in portable test equipment. IC Role / Device Role / Timing Role: Serves as primary voltage reference source feeding ADC's REF+ input via RC filter. Use Value: Delivers sub-50 nV/√Hz noise floor and <0.01% line regulation error, preserving effective number of bits (ENOB). |
| Low-Power Microcontroller Bias Network | Optical Transceiver Laser Driver Bias |
|
Use Scenario: Setting stable gate voltage for discrete MOSFETs in ultra-low-power wake-up circuitry. IC Role / Device Role / Timing Role: Provides regulated 12.6 V bias to PMOS gate while drawing <1 μA quiescent current. Use Value: Ensures consistent turn-on threshold across temperature, eliminating false wake-ups in battery-powered IoT nodes. |
Use Scenario: Establishing accurate bias point for laser diode monitor photodiode amplifiers in GPON OLT modules. IC Role / Device Role / Timing Role: Supplies low-noise 12.6 V reference to transimpedance amplifier feedback network. Use Value: Reduces photocurrent measurement uncertainty to <±0.2% full scale, meeting ITU-T G.984.2 optical budget requirements. |
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) | 12 V nominal, ±5% tolerance (±0.6 V), 22 Ω rd, 1 W Pd, DO-41 package | Higher power, looser tolerance, higher noise - suitable for non-critical supply rails, not precision references | Select when cost and power handling outweigh noise and tolerance requirements. |
| BZX84-C12 (Diodes Inc.) | 12 V nominal, ±5% tolerance, 30 Ω rd, 300 mW Pd, SOT-23 surface-mount | Smaller footprint, higher tempco (−0.07 %/°C), no low-noise optimization - fits dense PCBs but sacrifices stability | Choose for space-constrained digital systems where 1% reference accuracy suffices. |
Compared with 1N4742A and BZX84-C12, the HZ12B1LTA-E delivers tighter voltage tolerance, significantly lower noise, and superior temperature stability - making it the preferred choice for analog-intensive applications demanding long-term reference integrity without trimming.
Availability
HZ12B1LTA-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, high-resolution data acquisition systems, and low-power microcontroller bias networks requiring stable component supply and long-lifecycle continuity.
Supply support for HZ12B1LTA-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 connectivity solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in precision analog signal chains - emphasizing reduced flicker noise and improved thermal tracking versus legacy HZ devices.
FAQ
What is the zener voltage range for HZ12B1LTA-E?
The HZ12B1LTA-E has a specified zener voltage range of 12.4 V to 12.9 V when tested at IZ = 0.5 mA and TA = 25°C. This ±0.5 V tolerance enables predictable regulation in precision bias and reference circuits without post-manufacturing trimming. The actual VZ for any given unit falls within this window and is verified during production screening.
Is HZ12B1LTA-E suitable for high-temperature environments?
Yes, the HZ12B1LTA-E supports operation up to 175°C junction temperature and storage from −55°C to +175°C. Its DO-35 glass package and silicon planar construction maintain parameter stability across this full range, making it appropriate for under-hood automotive sensors or industrial motor control cabinets where ambient temperatures exceed 100°C.
How does the noise performance of HZ12B1LTA-E compare to standard Zener diodes?
The HZ12B1LTA-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to optimized junction geometry and processing. This low-noise characteristic is confirmed in Renesas' characterization data and directly benefits applications such as precision ADC references and low-drift op-amp biasing where voltage noise contributes measurably to system error budgets.
What is the dynamic resistance specification for HZ12B1LTA-E?
The HZ12B1LTA-E has a maximum dynamic resistance (rd) of 80 Ω when measured at IZ = 0.5 mA and TA = 25°C. This value reflects the slope of the V–I curve in breakdown and determines how much the output voltage changes with small variations in current - critical for maintaining regulation accuracy in variable-load analog stages.
Does HZ12B1LTA-E have a specified temperature coefficient?
Yes, the HZ12B1LTA-E exhibits a typical temperature coefficient (γZ) of −0.02 %/°C near its nominal 12.6 V operating point, as shown in Figure 2 of the official Renesas datasheet REJ03G0182-0300. This negative coefficient is stable across the 12.4–12.9 V range and enables predictable drift modeling in temperature-compensated reference designs.
HZ12B1LTA-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:
- -
HZ12B1LTA-E FAQ
1.How can I place an order for HZ12B1LTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ12B1LTA-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 HZ12B1LTA-E reliable?
The price and inventory of HZ12B1LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ12B1LTA-E is usually 5 days.
3.What payment methods are accepted for HZ12B1LTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ12B1LTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ12B1LTA-E?
HZ12B1LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ12B1LTA-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 HZ12B1LTA-E?
For technical support, including HZ12B1LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ12B1LTA-E requirements.
6.How does Aetrix verify that HZ12B1LTA-E is sourced from the original manufacturer or authorized distributors?
All HZ12B1LTA-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 HZ12B1LTA-E meets industry standards.
7.What is the process for return or replacement of HZ12B1LTA-E?
All HZ12B1LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ12B1LTA-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 HZ12B1LTA-E part is unused and in its original packaging.
Return procedure for HZ12B1LTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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