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Renesas HZ12B1L-E
- Part No.:
- HZ12B1L-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
HZ12B1L-E.pdf
- Description:
- DIODE ZENER 12V 400MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:10,700
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Product details
Overview
HZ12B1L-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 12.4–12.9 V at 0.5 mA test current, 80 Ω dynamic resistance, 400 mW power dissipation, and DO-35 glass package. It serves as a stable reference in low-drift power supplies and sensor biasing networks.
For engineers reviewing the HZ12B1L-E datasheet, HZ12B1L-E pinout, HZ12B1L-E application, or HZ12B1L-E equivalent, key selection criteria include zener voltage tolerance (±0.5 V), low noise performance relative to standard HZ series, temperature coefficient behavior near 12.6 V, and DO-35 thermal derating above 75°C.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its low-noise design reduces RMS noise by ~70% versus legacy HZ-series diodes, achieved through optimized doping profile and passivation.
It exhibits a positive zener voltage temperature coefficient of approximately +0.04 %/°C at 12.6 V (per Fig.2), and thermal derating follows a linear 3.3 mW/°C reduction above 75°C (per Fig.3), enabling predictable operation up to 175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.4–12.9 V at IZ = 0.5 mA - defines tight regulation window for 12 V reference designs |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - ensures minimal output impedance variation under load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact PCB layouts with adequate heatsinking |
| Reverse Leakage (IR) | 1 μA max at VR = 10.5 V - enables high-impedance bias networks without significant error current |
| Junction Temperature (Tj) | −55 to +175°C - allows deployment in industrial and automotive under-hood environments |
| Noise Reduction | ~70% lower RMS noise vs. HZ series - critical for audio preamps, ADC references, and low-level signal conditioning |
Pinout & Package
Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), orange body with navy blue cathode band, 2.0 mm diameter × 26.0 mm length, 0.13 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference terminal | Connected to regulated output node; polarity must be observed to avoid forward conduction |
| 2 (Anode) | Reference ground return | Provides low-impedance path to circuit common; trace routing affects noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener structure | Reduces RMS noise to ~30% of standard HZ-series diodes-enables use in high-SNR instrumentation front-ends |
| Stable 12.6 V nominal regulation | Tight 0.5 V tolerance band supports ±2% reference accuracy without trimming in 12 V systems |
| DO-35 thermal performance | Derates linearly to zero at 175°C junction-supports reliable operation in sealed enclosures without forced cooling |
| Low leakage current | ≤1 μA at 10.5 V reverse bias-minimizes error in high-resistance divider networks and battery-powered sensors |
Applications
| Precision Voltage Reference | Low-Noise Audio Biasing |
|---|---|
Use Scenario: Providing stable 12.6 V reference for 16-bit SAR ADCs and precision op-amp feedback networks in data acquisition modules. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing DC operating point for analog signal chain components. Use Value: Tight 0.5 V zener tolerance and 80 Ω dynamic resistance minimize gain error and line regulation drift across temperature. |
Use Scenario: Biasing JFET input stages and discrete transistor amplifiers in studio-grade microphone preamplifiers. IC Role / Device Role / Timing Role: Low-noise DC bias source replacing higher-noise Zener alternatives in high-gain analog signal paths. Use Value: ~70% lower RMS noise versus HZ-series diodes directly improves system SNR by 3–5 dB in 20 Hz–20 kHz bandwidth. |
| Industrial Sensor Excitation | Stabilized Power Supply Shunt |
Use Scenario: Supplying excitation voltage to strain gauge bridges and RTD interfaces in process control transmitters. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant bridge voltage despite supply ripple or load variation. Use Value: ≤1 μA leakage ensures <0.01% measurement error in 100 kΩ+ bridge arms; DO-35 package fits tight sensor module footprints. |
Use Scenario: Overvoltage protection and voltage clamping in 12 V linear regulator outputs for embedded controllers. IC Role / Device Role / Timing Role: Passive shunt element absorbing transient energy and regulating output during no-load or light-load conditions. Use Value: 400 mW rating handles short-duration surges; 80 Ω rd limits output droop to <100 mV under 10 mA step load changes. |
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 |
|---|---|---|---|
| BZX84-C12LT1G (ON Semiconductor) | 12 V nominal, ±5% tolerance (11.4–12.7 V), 90 Ω rd, SOT-23 package, 350 mW Pd | SMT-compatible but wider voltage tolerance and higher dynamic resistance limit use in precision references | Prefer for space-constrained PCBs where ±5% regulation is acceptable and reflow compatibility is required |
| 1N4742A (ON Semiconductor) | 12 V nominal, ±5% tolerance (11.4–12.7 V), 22 Ω rd, DO-41 package, 1 W Pd | Higher power and lower rd, but 3× higher noise than HZ12B1L-E and no low-noise specification | Prefer for high-current shunt regulation where noise is secondary to thermal robustness and cost |
Compared with BZX84-C12LT1G and 1N4742A, the HZ12B1L-E delivers tighter voltage tolerance (±0.5 V vs. ±5%), verified low-noise performance critical for signal integrity, and optimized thermal derating for sealed industrial enclosures-making it uniquely suited for precision analog reference roles where noise and stability outweigh raw power handling.
Availability
HZ12B1L-E is available at Aetrix Electronics and suitable for precision voltage reference, low-noise audio biasing, and industrial sensor excitation requiring stable component supply with consistent parametric performance across production lots.
Supply support for HZ12B1L-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 Technology Corp. is a Japanese semiconductor manufacturer specializing in microcontrollers, analog mixed-signal ICs, and power management 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-addressing limitations of legacy Zener families in audio, measurement, and sensor signal chains.
FAQ
What is the exact zener voltage range for HZ12B1L-E at 0.5 mA test current?
The HZ12B1L-E has a guaranteed zener voltage range of 12.4 V to 12.9 V when tested at IZ = 0.5 mA and Ta = 25°C, per the Electrical Characteristics table on page 3 of REJ03G0182-0300 Rev.3.00. This 0.5 V span reflects its tight tolerance design for precision reference use, and the value is measured using DC test conditions as noted in the datasheet.
Does HZ12B1L-E have a documented low-noise specification compared to standard Zener diodes?
Yes-the HZ-L Series datasheet explicitly states that its noise level is "approximately 1/3–1/10 lower than the HZ series," and the HZ12B1L-E inherits this low-noise characteristic. This improvement results from optimized planar diffusion and passivation processes, making HZ12B1L-E suitable for high-SNR applications where standard Zeners introduce measurable interference.
What is the maximum power dissipation and thermal derating behavior of HZ12B1L-E?
HZ12B1L-E has a maximum power dissipation of 400 mW at ambient temperature of 25°C. As shown in Figure 3, its power rating decreases linearly at 3.3 mW/°C above 75°C ambient, reaching zero at 175°C. This derating curve is defined for the DO-35 package mounted on a standard FR-4 PCB with specified copper area, and must be applied in thermal design calculations for HZ12B1L-E.
Is HZ12B1L-E compatible with lead-free reflow soldering processes?
The HZ12B1L-E uses a DO-35 glass package with axial leads and is rated for a maximum junction temperature of 175°C. While the datasheet does not specify JEDEC J-STD-020 compliance, its glass-body construction and lead material are compatible with standard SnPb and lead-free reflow profiles-provided peak temperatures do not exceed 260°C for ≤10 seconds and thermal shock is minimized to prevent hermetic seal fracture.
What is the reverse leakage current specification for HZ12B1L-E, and at what voltage is it measured?
HZ12B1L-E specifies a maximum reverse leakage current (IR) of 1 μA, measured at a reverse voltage (VR) of 10.5 V and ambient temperature of 25°C. This low leakage supports high-impedance reference networks and minimizes error in precision divider configurations where even nanoamp-level currents affect accuracy.
HZ12B1L-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2.08%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10.5 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
HZ12B1L-E FAQ
1.How can I place an order for HZ12B1L-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ12B1L-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 HZ12B1L-E reliable?
The price and inventory of HZ12B1L-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ12B1L-E is usually 5 days.
3.What payment methods are accepted for HZ12B1L-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ12B1L-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ12B1L-E?
HZ12B1L-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ12B1L-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 HZ12B1L-E?
For technical support, including HZ12B1L-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ12B1L-E requirements.
6.How does Aetrix verify that HZ12B1L-E is sourced from the original manufacturer or authorized distributors?
All HZ12B1L-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 HZ12B1L-E meets industry standards.
7.What is the process for return or replacement of HZ12B1L-E?
All HZ12B1L-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ12B1L-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 HZ12B1L-E part is unused and in its original packaging.
Return procedure for HZ12B1L-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ12B1L-E Tags
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MM5Z5V1ST1G
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