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Renesas HZ12B2LTD-E
- Part No.:
- HZ12B2LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ12B2LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
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Product details
Overview
HZ12B2LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 12.6 V to 13.1 V, dynamic resistance of 80 Ω at 0.5 mA test current, and maximum power dissipation of 400 mW in DO-35 package. It serves as a stable reference in low-drift power supply feedback paths and sensor biasing networks.
For engineers reviewing the HZ12B2LTD-E datasheet, HZ12B2LTD-E pinout, HZ12B2LTD-E application, or HZ12B2LTD-E equivalent, key selection criteria include zener voltage tolerance (±0.5 V), temperature coefficient (−0.04 %/°C typical at 12.8 V), low noise performance (1/3–1/10 that of standard HZ series), and DO-35 mechanical compatibility for through-hole PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon planar junction, delivering stable reverse-bias regulation with low dynamic impedance (80 Ω) and minimal temperature-induced drift. Its noise spectral density is reduced via optimized doping and junction geometry versus legacy HZ-series diodes.
The HZ12B2LTD-E is rated for continuous operation up to 175°C junction temperature and supports DC zener current up to 1 mA under specified thermal conditions. It exhibits a negative temperature coefficient of −0.04 %/°C near its 12.8 V nominal point, enabling predictable thermal compensation in reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.6 V min to 13.1 V max at IZ = 0.5 mA - defines tight regulation window for ±0.5 V tolerance in feedback loops |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - ensures minimal output impedance variation under load transients |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal derating limit for PCB trace width and copper area planning |
| Reverse Leakage (IR) | 1 μA max at VR = 10.5 V - guarantees negligible error current in high-impedance reference nodes |
| Temperature Coefficient (γZ) | −0.04 %/°C typical at 12.8 V - enables predictable drift modeling for 0–70°C operating range |
| Junction Temperature (Tj) | 175°C max - determines maximum allowable ambient + self-heating margin in enclosed enclosures |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - standard axial-leaded through-hole footprint 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 terminal marked by band; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential side of load; reverse-biased operation requires this terminal at positive potential relative to anode |
| Anode (unbanded end) | Reference ground return | Serves as current sink path; must be tied to circuit common or regulated ground plane for stable biasing |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise level ≈ 1/3–1/10 that of standard HZ series - critical for audio preamps and precision ADC references |
| Stable low-impedance regulation | 80 Ω dynamic resistance at 0.5 mA - maintains <10 mV output shift under 1 mA load step |
| Wide zener voltage range support | Part of HZ-L family spanning 5.2 V to 38 V - allows single-supplier sourcing across multiple reference voltages |
| High thermal reliability | 175°C max junction temperature rating - supports operation in industrial environments with minimal heatsinking |
| Low leakage performance | ≤1 μA reverse current at 10.5 V - preserves accuracy in µA-level bias networks and battery-powered sensors |
Applications
| Industrial Sensor Signal Conditioning | Low-Noise Audio Power Supply Reference |
|---|---|
Use Scenario: Precision temperature and pressure transducers require stable excitation and reference voltages unaffected by thermal drift or broadband noise. IC Role / Device Role / Timing Role: HZ12B2LTD-E provides fixed 12.8 V reference for op-amp biasing and ADC voltage reference buffers. Use Value: Its −0.04 %/°C tempco and 80 Ω rd reduce system gain error to <0.1% over 0–60°C, while ultra-low noise prevents signal-to-noise degradation. | Use Scenario: High-fidelity audio DACs and preamplifiers demand ultra-stable, low-noise analog supply rails to avoid audible hum or distortion. IC Role / Device Role / Timing Role: HZ12B2LTD-E regulates the ±12 V analog supply rail in discrete op-amp stages and voltage-controlled filters. Use Value: Noise reduction to 1/10 of standard Zeners eliminates measurable hiss in 110 dB SNR systems; 400 mW rating supports parallel use with current-limiting resistors. |
| Programmable Logic Controller (PLC) Analog Input Module | Medical Diagnostic Instrument Bias Supply |
Use Scenario: PLC input modules condition 4–20 mA loop signals and require calibrated, repeatable reference voltages for ADC conversion. IC Role / Device Role / Timing Role: HZ12B2LTD-E establishes the 12.8 V reference for 16-bit sigma-delta ADC front-end gain calibration. Use Value: Tight 0.5 V VZ tolerance and low rd ensure <±0.02% full-scale error across 10-year field deployment without recalibration. | Use Scenario: Portable ECG and EEG amplifiers need stable, low-noise bias for instrumentation amplifiers operating from battery sources. IC Role / Device Role / Timing Role: HZ12B2LTD-E supplies clean 12.8 V reference to dual-supply op-amps driving high-impedance electrode interfaces. Use Value: Sub-μA leakage prevents input bias current errors in pA-level bio-signal paths; DO-35 package allows manual rework during medical-grade QA testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | Zener voltage 12 V ±5%, rd = 9 Ω @ 21 mA, higher noise, no low-noise optimization | Higher power dissipation (1 W), suited for coarse regulation not precision analog | Select only when cost sensitivity outweighs noise and tempco requirements |
| BZX84-C12LT1G | Zener voltage 12 V ±5%, SOT-23 package, rd = 30 Ω @ 5 mA, higher leakage (100 nA) | Surface-mount only; unsuitable for through-hole legacy designs or high-reliability manual assembly | Choose for space-constrained PCBs where DO-35 footprint is unavailable |
Compared with 1N4742A and BZX84-C12LT1G, the HZ12B2LTD-E delivers superior low-noise performance and tighter voltage tolerance in a proven through-hole package, making it optimal for analog signal chains where reference stability directly impacts measurement fidelity.
Availability
HZ12B2LTD-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-noise audio power supply reference, programmable logic controller analog input modules, and medical diagnostic instrument bias supply requiring stable component supply and long-term obsolescence management.
Supply support for HZ12B2LTD-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 manufacturer specializing in microcontrollers, analog and power devices, and advanced SoCs for automotive, industrial, and enterprise applications.
The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in precision analog systems, extending Renesas' legacy in high-reliability discrete components.
FAQ
What is the exact zener voltage range for HZ12B2LTD-E?
The HZ12B2LTD-E has a guaranteed zener voltage range of 12.6 V minimum to 13.1 V maximum when tested at IZ = 0.5 mA and Ta = 25°C. This 0.5 V tolerance window ensures consistent performance across production lots and supports accurate calibration in feedback networks without binning.
Does HZ12B2LTD-E support surface-mount assembly?
No, the HZ12B2LTD-E uses a DO-35 axial glass package with 26 mm leads and is designed exclusively for through-hole mounting. Its JEITA package code GRZZ0002ZB-A confirms mechanical compatibility with standard DO-35 sockets and wave-soldering processes - surface-mount alternatives require redesign.
What is the maximum reverse leakage current specification for HZ12B2LTD-E?
The HZ12B2LTD-E specifies a maximum reverse leakage current (IR) of 1 μA at VR = 10.5 V and Ta = 25°C. This ultra-low leakage ensures minimal error contribution in high-impedance reference divider networks and preserves accuracy in battery-operated portable instruments.
How does the noise performance of HZ12B2LTD-E compare to standard Zener diodes?
The HZ12B2LTD-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zener diodes due to proprietary junction design and doping control. This reduction is verified in Renesas' REJ03G0182-0300 datasheet and directly improves SNR in precision ADC references and low-level analog amplification stages.
Is HZ12B2LTD-E qualified for automotive applications?
No, the HZ12B2LTD-E is classified as a "Standard" quality grade device per Renesas' documentation and is intended for computers, office equipment, communications gear, and industrial robots - not automotive or safety-critical systems. Automotive-grade equivalents require explicit "High Quality" designation and AEC-Q200 qualification, which HZ12B2LTD-E does not hold.
HZ12B2LTD-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:
- -
HZ12B2LTD-E FAQ
1.How can I place an order for HZ12B2LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ12B2LTD-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 HZ12B2LTD-E reliable?
The price and inventory of HZ12B2LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ12B2LTD-E is usually 5 days.
3.What payment methods are accepted for HZ12B2LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ12B2LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ12B2LTD-E?
HZ12B2LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ12B2LTD-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 HZ12B2LTD-E?
For technical support, including HZ12B2LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ12B2LTD-E requirements.
6.How does Aetrix verify that HZ12B2LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ12B2LTD-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 HZ12B2LTD-E meets industry standards.
7.What is the process for return or replacement of HZ12B2LTD-E?
All HZ12B2LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ12B2LTD-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 HZ12B2LTD-E part is unused and in its original packaging.
Return procedure for HZ12B2LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ12B2LTD-E Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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