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Renesas HZ27-2L-E
- Part No.:
- HZ27-2L-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ27-2L-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
HZ27-2L-E from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 26.2–27.6 V at 0.5 mA test current, 24.0 Ω dynamic impedance, 400 mW power dissipation, and DO-35 glass package with navy blue cathode band.
For engineers reviewing the HZ27-2L-E datasheet, HZ27-2L-E pinout, HZ27-2L-E application, or HZ27-2L-E equivalent, this device is selected for noise-sensitive reference stages, low-drift power supply shunt regulation, and high-stability analog sensor biasing where zener impedance and temperature coefficient directly impact system accuracy.
Technical Context
The HZ27-2L-E operates as a two-terminal shunt regulator with DC-tested zener breakdown characteristics, optimized for low-noise performance via reduced junction noise density compared to standard HZ-series diodes. Its 24.0 Ω dynamic resistance at 0.5 mA ensures stable regulation under small-signal load variations.
Designed for operation up to 175°C junction temperature and −55°C to +175°C storage range, the device uses a silicon planar structure with controlled doping to achieve tight zener voltage tolerance (±0.7 V) and predictable temperature coefficient behavior across its 26.2–27.6 V range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.2–27.6 V at IZ = 0.5 mA - defines precise regulation point for reference design |
| Dynamic Resistance (rd) | 24.0 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous thermal budget in PCB layout |
| Reverse Leakage (IR) | 1 μA max at VR = 20.9 V - ensures minimal error current in high-impedance bias networks |
| Junction Temperature (Tj) | 175°C maximum - enables reliable operation in thermally constrained industrial enclosures |
| Zener Voltage Tempco | ≈−0.06 %/°C (typ.) near 27 V - quantifies drift contribution per degree ambient change |
Pinout & Package
Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, orange body with navy blue cathode band, mass 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage 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 |
|---|---|
| Noise level | ≈1/3–1/10 lower than standard HZ series - reduces RMS voltage noise in precision references |
| Zener impedance | 24.0 Ω max at 0.5 mA - improves line/load regulation stability in feedback loops |
| Leakage current | 1 μA max at 20.9 V - minimizes error in high-Z bias and sensing circuits |
| Voltage range coverage | 26.2–27.6 V tolerance window - supports ±0.7 V calibration margin in production |
Applications
| High-Precision Reference Source | Low-Drift Sensor Biasing |
|---|---|
Use Scenario: Stable 27 V reference for 24-bit delta-sigma ADCs and DACs in metrology equipment. IC Role / Device Role / Timing Role: Shunt voltage reference providing low-noise, low-drift excitation for analog front-ends. Use Value: 24.0 Ω dynamic resistance and low noise enable <10 μVpp ripple in 10 Hz–10 kHz band, critical for ENOB preservation. |
Use Scenario: Biasing bridge-based strain gauges and RTDs in industrial process transmitters. IC Role / Device Role / Timing Role: Low-leakage zener source maintaining constant excitation voltage despite ambient temperature swings. Use Value: 1 μA max reverse leakage prevents >0.01% gain error in 10 MΩ bridge arms; −0.06 %/°C tempco limits drift to <15 ppm/°C. |
| Stabilized Power Supply Shunt | Overvoltage Protection Clamp |
Use Scenario: Secondary shunt regulator in isolated DC-DC converters for telecom power modules. IC Role / Device Role / Timing Role: Precision voltage clamp absorbing transient excess current during load step events. Use Value: 400 mW rating allows sustained 15 mA clamping at 27 V without thermal runaway; DO-35 package enables through-hole thermal anchoring. |
Use Scenario: Input-stage overvoltage clamp protecting op-amp inputs in automotive battery-sensed circuits. IC Role / Device Role / Timing Role: Fast-acting crowbar element limiting transient spikes to ≤27.6 V before damage occurs. Use Value: 26.2–27.6 V breakdown window provides defined clamping threshold; low noise avoids injecting interference into signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX85C27 (Nexperia) | 27 V nominal, 300 mW Pd, 35 Ω rd, DO-41 package | Higher dynamic impedance and lower power rating reduce regulation accuracy under load variation | Select when cost sensitivity outweighs noise and stability requirements |
| 1N5254B (ON Semiconductor) | 27 V nominal, 500 mW Pd, 35 Ω rd, DO-35 package, higher leakage (5 μA) | Greater leakage increases error in high-impedance bias networks; wider VZ tolerance (±5%) | Choose only if higher power handling is required and noise is secondary |
Compared with BZX85C27 and 1N5254B, the HZ27-2L-E delivers superior low-noise performance, tighter voltage tolerance, and lower dynamic impedance in the same DO-35 footprint-making it optimal for metrology-grade references where regulation stability and spectral purity are non-negotiable.
Availability
HZ27-2L-E is available at Aetrix Electronics and suitable for precision voltage reference design, low-drift sensor excitation, and stabilized shunt regulation requiring stable component supply across industrial instrumentation, test equipment, and aerospace subsystems.
Supply support for HZ27-2L-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 devices, and power management ICs for industrial, automotive, and infrastructure markets.
The HZ-L Series was developed specifically for low-noise, high-stability zener reference applications in measurement and control systems where conventional zeners introduce unacceptable voltage noise or drift.
FAQ
What is the exact zener voltage range specified for HZ27-2L-E?
The HZ27-2L-E has a guaranteed zener voltage range of 26.2 V to 27.6 V when tested at IZ = 0.5 mA and Ta = 25°C. This 1.4 V window reflects the device's factory binning for precision applications requiring tight regulation tolerance without external trimming.
Does HZ27-2L-E have a documented temperature coefficient, and what is its typical value?
Yes, the HZ27-2L-E exhibits a typical zener voltage temperature coefficient (γZ) of approximately −0.06 %/°C near its 27 V operating point, as confirmed by Renesas' characteristic curves (Fig.2). This negative coefficient is consistent with zener diodes in the 25–30 V range and must be compensated in ultra-stable reference designs.
What is the maximum reverse leakage current for HZ27-2L-E, and at what voltage is it measured?
The maximum reverse leakage current for HZ27-2L-E is 1 μA, measured at VR = 20.9 V (80% of minimum VZ). This low leakage ensures minimal error current in high-impedance bias networks such as those used in precision op-amp input stages or bridge sensor excitation.
Can HZ27-2L-E be used in surface-mount designs?
No, the HZ27-2L-E is exclusively packaged in the through-hole DO-35 axial glass case (JEITA code GRZZ0002ZB-A) and lacks an SMD variant. Its mechanical construction and thermal path require axial mounting with adequate PCB copper area for heat dissipation up to 400 mW.
How does the noise performance of HZ27-2L-E compare to standard zener diodes?
The HZ27-2L-E achieves approximately 1/3 to 1/10 the noise level of standard HZ-series zeners due to optimized silicon planar processing and junction geometry. This reduction directly lowers RMS voltage noise in reference outputs, making it suitable for sub-10 μVpp noise-critical applications like high-resolution data acquisition.
HZ27-2L-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:
- -
HZ27-2L-E FAQ
1.How can I place an order for HZ27-2L-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ27-2L-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 HZ27-2L-E reliable?
The price and inventory of HZ27-2L-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ27-2L-E is usually 5 days.
3.What payment methods are accepted for HZ27-2L-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ27-2L-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ27-2L-E?
HZ27-2L-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ27-2L-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 HZ27-2L-E?
For technical support, including HZ27-2L-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ27-2L-E requirements.
6.How does Aetrix verify that HZ27-2L-E is sourced from the original manufacturer or authorized distributors?
All HZ27-2L-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 HZ27-2L-E meets industry standards.
7.What is the process for return or replacement of HZ27-2L-E?
All HZ27-2L-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ27-2L-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 HZ27-2L-E part is unused and in its original packaging.
Return procedure for HZ27-2L-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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