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Renesas HZ11A2-E
- Part No.:
- HZ11A2-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ11A2-E.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:13,150
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Product details
Overview
HZ11A2-E from Renesas is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized DC supplies, featuring a nominal zener voltage of 11.9 V (min) to 12.4 V (max) at 5 mA test current, 500 mW power dissipation, and low dynamic impedance of 7.5 Ω - used in reference voltage generation for sensor signal conditioning circuits.
For engineers reviewing the HZ11A2-E datasheet, HZ11A2-E pinout, HZ11A2-E application, or HZ11A2-E equivalent, key selection criteria include zener voltage tolerance (±0.5 V), temperature coefficient (−0.04 %/°C at ~12 V), DO-35 package compatibility, and reverse leakage <1 µA at VR = 9.5 V.
Technical Context
The HZ11A2-E operates as a two-terminal voltage reference device with cathode-anode polarity, relying on controlled avalanche breakdown in its silicon junction. Its zener voltage is specified at IZ = 5 mA with DC test conditions, and it exhibits a negative temperature coefficient of −0.04 %/°C near 12 V, enabling stable biasing across industrial temperature ranges.
Designed for linear regulation roles, it delivers low dynamic resistance (7.5 Ω) and low leakage (<1 µA at 9.5 V), supporting accurate voltage clamping in feedback networks of LDOs and op-amp references. It is not intended for high-current shunt regulation or transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.9 V min to 12.4 V max at IZ = 5 mA - defines tight regulation window for 12 V rail referencing |
| Power Dissipation (Pd) | 500 mW maximum - supports continuous operation up to ~41.7 mA at 12 V without heatsinking |
| Dynamic Resistance (rd) | 7.5 Ω max at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Leakage (IR) | <1 µA at VR = 9.5 V - preserves low quiescent current in battery-powered references |
| Temperature Coefficient | −0.04 %/°C at ~12 V - enables predictable drift compensation in temperature-sensitive analog stages |
| Junction Temperature (Tj) | 175 °C maximum - allows reliable operation in enclosed industrial enclosures with ambient up to 125 °C |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded case with navy blue cathode band; dimensions per SC-40 standard (L ≈ 26 mm, φD ≈ 2.0 mm, mass ≈ 0.13 g).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference node | Connected to regulated positive rail; reverse-biased terminal where zener breakdown occurs |
| 2 (Anode) | Reference ground return | Common connection point for current-limiting resistor and load ground; establishes reference potential |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 7.5 Ω max ensures ≤37.5 mV output shift for ±5 mA load change - critical for precision feedback loops |
| Narrow voltage grade (A2) | 11.9–12.4 V tolerance (±0.25 V) enables tighter system-level voltage margining than generic 12 V Zeners |
| Stable temperature coefficient | −0.04 %/°C minimizes drift to ~±4.8 mV/°C - suitable for uncalibrated industrial sensors |
| Low leakage current | <1 µA at 9.5 V prevents >10 MΩ effective parallel resistance degradation in high-impedance reference dividers |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reference |
|---|---|
Use Scenario: Providing stable 12 V reference for bridge sensor excitation and instrumentation amplifier biasing in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end circuitry. Use Value: Maintains excitation accuracy within ±0.5% over −25°C to +85°C, directly improving sensor linearity and repeatability. |
Use Scenario: Generating clean 12 V reference for ADC reference input and internal LDO feedback in battery-powered edge-node microcontrollers. IC Role / Device Role / Timing Role: Low-leakage voltage reference element in mixed-signal SoC support circuitry. Use Value: Enables 12-bit ADC performance with <1 LSB error contribution from reference drift and noise. |
| Linear Regulator Feedback Network | Overvoltage Clamp in 12 V Systems |
Use Scenario: Setting output voltage of adjustable LDOs (e.g., TLV707 series) via resistive divider anchored to HZ11A2-E cathode. IC Role / Device Role / Timing Role: Fixed-voltage node defining regulation setpoint in closed-loop feedback path. Use Value: Replaces multi-resistor networks with single-point stability, reducing component count and thermal EMF errors. |
Use Scenario: Clamping transient spikes on 12 V automotive body-control module rails during load-dump events. IC Role / Device Role / Timing Role: Fast-acting shunt protection element limiting voltage excursion above 12.4 V. Use Value: Absorbs short-duration surges up to 500 mW without latch-up, preserving downstream logic integrity. |
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 |
|---|---|---|---|
| BZX55C12 (ON Semiconductor) | 12.05 V nominal (±5%), 500 mW, rd = 25 Ω, TC = −0.075 %/°C | Wider voltage tolerance and higher impedance reduce accuracy in precision references | Acceptable for non-critical 12 V clamping where cost is primary concern |
| MMSZ5242B (Diodes Inc.) | 12 V nominal (±5%), SOD-123 package, Pd = 350 mW, rd = 30 Ω | Lower power rating and surface-mount form limit use in through-hole industrial designs | Suitable only for space-constrained PCBs accepting derated power and reduced stability |
Compared with BZX55C12 and MMSZ5242B, the HZ11A2-E offers tighter voltage grading (A2), lower dynamic impedance (7.5 Ω vs. ≥25 Ω), and superior temperature stability (−0.04 %/°C), making it preferred for analog signal chains requiring sub-0.5% reference accuracy over temperature.
Availability
HZ11A2-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-power microcontroller reference design, and linear regulator feedback networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HZ11A2-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, and power devices for industrial, automotive, and infrastructure applications.
The HZ Series Zener diodes were developed for high-stability, low-drift voltage reference functions in industrial power management and analog signal conditioning systems - emphasizing precision, reliability, and manufacturability in through-hole applications.
FAQ
What is the exact zener voltage range for HZ11A2-E?
The HZ11A2-E has a guaranteed zener voltage range of 11.9 V minimum to 12.4 V maximum when tested at IZ = 5 mA and Ta = 25°C. This A2 grade reflects a tight ±0.25 V tolerance around the nominal 12.15 V center point, confirmed in Renesas document REJ03G0180-0600 page 4.
Is HZ11A2-E compatible with DO-35 socket footprints?
Yes, the HZ11A2-E uses the standard DO-35 package (JEITA code GRZZ0002ZB-A) with 26 mm body length and 2.0 mm diameter, matching IPC-7351B DO-35 land patterns. The navy blue cathode band aligns with industry-standard polarity marking for manual assembly and AOI inspection.
What is the maximum reverse leakage current for HZ11A2-E?
The HZ11A2-E specifies maximum reverse leakage current of 1 µA at VR = 9.5 V and Ta = 25°C. This low leakage supports high-impedance reference divider networks and extends battery life in always-on monitoring circuits using the HZ11A2-E.
Does HZ11A2-E have a positive or negative temperature coefficient?
The HZ11A2-E exhibits a negative temperature coefficient of approximately −0.04 %/°C near its 12 V operating point, as shown in Figure 2 of the Renesas datasheet. This means its zener voltage decreases by ~4.8 mV per degree Celsius rise - a key factor in thermal drift budgeting for precision analog designs using HZ11A2-E.
Can HZ11A2-E be used in place of generic 12 V Zener diodes?
The HZ11A2-E can replace generic 12 V Zeners only when its specific A2-grade voltage range (11.9–12.4 V), 7.5 Ω dynamic resistance, and −0.04 %/°C temperature coefficient meet the design's accuracy and stability requirements. Substituting into legacy designs requires verification of these parameters - especially under varying temperature and current conditions - because the HZ11A2-E is not a generic drop-in replacement.
HZ11A2-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:
- -
HZ11A2-E FAQ
1.How can I place an order for HZ11A2-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ11A2-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 HZ11A2-E reliable?
The price and inventory of HZ11A2-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ11A2-E is usually 5 days.
3.What payment methods are accepted for HZ11A2-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ11A2-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ11A2-E?
HZ11A2-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ11A2-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 HZ11A2-E?
For technical support, including HZ11A2-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ11A2-E requirements.
6.How does Aetrix verify that HZ11A2-E is sourced from the original manufacturer or authorized distributors?
All HZ11A2-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 HZ11A2-E meets industry standards.
7.What is the process for return or replacement of HZ11A2-E?
All HZ11A2-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ11A2-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 HZ11A2-E part is unused and in its original packaging.
Return procedure for HZ11A2-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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