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Renesas HZ27-2JTD
- Part No.:
- HZ27-2JTD
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ27-2JTD.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZ27-2JTD from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 26.2–27.6 V, 400 mW power dissipation, <150 Ω dynamic impedance at 0.5 mA, 1 μA maximum reverse leakage at 20.9 V, and DO-35 glass axial package. It serves in stabilized reference supplies for instrumentation amplifiers and sensor signal conditioning.
For engineers reviewing the HZ27-2JTD datasheet, HZ27-2JTD pinout, HZ27-2JTD application, or HZ27-2JTD equivalent, key selection criteria include zener voltage tolerance (±2.6 V), temperature coefficient (−0.04 %/°C typical), noise performance relative to legacy HZ series, and thermal derating above 50°C ambient.
Technical Context
The HZ27-2JTD operates as a two-terminal shunt regulator with DC-tested zener breakdown characteristics and low intrinsic noise-approximately 1/3 to 1/10 that of standard HZ-series diodes. Its junction temperature rating of 175°C supports high-reliability operation in thermally constrained PCB layouts.
Designed for stable DC reference generation, it exhibits a negative temperature coefficient (−0.04 %/°C) and maintains ≤150 Ω dynamic resistance up to 0.5 mA test current, enabling predictable regulation under light-load conditions in feedback networks and voltage monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.2–27.6 V at IZ = 0.5 mA - defines stable regulation range for mid-range precision references |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling before thermal derating |
| Dynamic Resistance (rd) | ≤150 Ω at IZ = 0.5 mA - ensures minimal output voltage variation under small-signal load changes |
| Reverse Leakage (IR) | ≤1 μA at VR = 20.9 V - guarantees low error contribution in high-impedance bias/reference nodes |
| Junction Temperature (Tj) | 175°C maximum - enables operation in industrial environments with localized heating |
| Temperature Coefficient (γZ) | −0.04 %/°C typical - provides predictable, linear drift for compensated reference designs |
Pinout & Package
DO-35 glass axial package with orange body color and navy-blue cathode band; total mass 0.13 g; lead spacing 26.0 mm; diameter 2.0 mm; length 5.0–20.0 mm depending on board mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; polarity must be observed for proper shunt regulation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | 1/3–1/10 noise vs. HZ series - reduces voltage reference jitter in ADC/DAC bias chains |
| Stable low-impedance regulation | rd ≤ 150 Ω at 0.5 mA - improves line/load regulation in low-current feedback loops |
| Wide zener voltage range support | 26.2–27.6 V nominal - matches common 24 V system rail monitoring and overvoltage clamp thresholds |
| High-temperature reliability | Tj = 175°C max - sustains operation in enclosed industrial enclosures without forced cooling |
Applications
| Instrumentation Reference Supply | Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable excitation voltage and bias reference for 4–20 mA transmitter circuits with ±0.1% accuracy requirements. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for op-amps and current-sense ICs. Use Value: Low dynamic impedance and low noise ensure sub-mV output ripple, preserving analog measurement fidelity. |
Use Scenario: Biasing bridge-based pressure or strain sensors in automotive engine control modules operating up to 125°C ambient. IC Role / Device Role / Timing Role: Precision DC reference source for ratiometric ADC conversion and offset trimming. Use Value: −0.04 %/°C tempco enables <±2 mV drift over −40°C to +125°C, meeting AEC-Q200 Class 1 stability targets. |
| Industrial Power Monitor | Programmable Logic Controller Input Stage |
Use Scenario: Detecting overvoltage events on 24 V DC control bus in factory automation systems with fast response and repeatable trip threshold. IC Role / Device Role / Timing Role: Zener-clamp element in crowbar or comparator input protection network. Use Value: Tight 26.2–27.6 V tolerance ensures consistent 10% overvoltage detection margin without calibration. |
Use Scenario: Level-shifting and clamping 24 V digital inputs to 5 V logic in PLC backplane I/O modules. IC Role / Device Role / Timing Role: Passive voltage limiter protecting microcontroller GPIO pins from transients. Use Value: 400 mW Pd withstands repetitive 100 ms surge events per IEC 61000-4-5 Level 3 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4751A (ON Semiconductor) | Zener voltage 30 V ±5%, rd = 200 Ω, Pd = 1 W, DO-41 package | Higher power and looser tolerance; suited for non-critical 30 V clamping, not low-noise 27 V references | Select only if higher power and relaxed voltage accuracy are acceptable; requires PCB footprint change |
| BZX85C27 (Nexperia) | Zener voltage 27 V ±5%, rd = 180 Ω, Pd = 1.3 W, DO-41 package | Higher noise floor and wider tolerance; lacks documented low-noise optimization for analog references | Use where cost and availability outweigh low-noise performance; not recommended for precision sensor bias |
Compared with 1N4751A and BZX85C27, the HZ27-2JTD delivers tighter voltage tolerance, lower dynamic impedance, and verified low-noise operation in a smaller DO-35 package-making it preferable for space-constrained, high-fidelity analog reference designs where regulation stability and spectral purity are critical.
Availability
HZ27-2JTD is available at Aetrix Electronics and suitable for industrial power monitors, sensor signal conditioners, instrumentation reference supplies, and programmable logic controller input stages requiring stable component supply across long-lifecycle production programs.
Supply support for HZ27-2JTD 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 manufacturer specializing in microcontrollers, analog and power devices, and advanced SoCs 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 demand for improved regulation fidelity over legacy Zener families like HZ.
FAQ
What is the exact zener voltage range specified for HZ27-2JTD?
The HZ27-2JTD 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 span reflects its "2J" grade tolerance within the HZ-L family and is confirmed in the Renesas datasheet REJ03G0182-0300 Rev.3.00. The HZ27-2JTD achieves tighter regulation than generic 27 V Zeners due to process-controlled breakdown characteristics.
Is HZ27-2JTD suitable for low-noise applications compared to standard Zener diodes?
Yes-the HZ27-2JTD delivers approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners, as explicitly stated in the Renesas datasheet. This low-noise performance is achieved through optimized silicon planar structure and low-leakage processing, making the HZ27-2JTD appropriate for precision reference circuits in audio preamps, medical sensor front-ends, and high-resolution data acquisition systems where voltage reference noise directly impacts SNR.
What is the maximum allowable reverse current before regulation degrades in HZ27-2JTD?
The HZ27-2JTD specifies a maximum reverse leakage current (IR) of 1 μA at VR = 20.9 V and Ta = 25°C. Regulation remains stable up to its rated test current of 0.5 mA, beyond which dynamic resistance increases gradually. Sustained operation above 0.5 mA requires thermal verification, as the HZ27-2JTD's 400 mW power limit constrains usable current at elevated ambient temperatures.
Does HZ27-2JTD have a positive or negative temperature coefficient?
The HZ27-2JTD exhibits a negative temperature coefficient (γZ) of approximately −0.04 %/°C, as shown in Figure 2 of the Renesas datasheet. This means its zener voltage decreases slightly with rising temperature-a characteristic typical of Zener diodes in the 5–30 V range. Designers using the HZ27-2JTD in temperature-sensitive applications should account for this drift, especially above 50°C ambient.
What package type and marking does HZ27-2JTD use?
The HZ27-2JTD uses the DO-35 glass axial package (JEITA code GRZZ0002ZB-A), with an orange body and navy-blue cathode band. Pin 1 (cathode) is identified by the banded end; Pin 2 (anode) is unmarked. The Renesas part marking "HZ27-2JTD" is laser-etched on the body, and the device weighs 0.13 g. Its dimensions conform to SC-40 standards: φD = 2.0 mm, E = 4.2 mm, L = 26.0 mm.
HZ27-2JTD 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:
- -
HZ27-2JTD FAQ
1.How can I place an order for HZ27-2JTD through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ27-2JTD 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 HZ27-2JTD reliable?
The price and inventory of HZ27-2JTD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ27-2JTD is usually 5 days.
3.What payment methods are accepted for HZ27-2JTD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ27-2JTD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ27-2JTD?
HZ27-2JTD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ27-2JTD 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 HZ27-2JTD?
For technical support, including HZ27-2JTD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ27-2JTD requirements.
6.How does Aetrix verify that HZ27-2JTD is sourced from the original manufacturer or authorized distributors?
All HZ27-2JTD 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 HZ27-2JTD meets industry standards.
7.What is the process for return or replacement of HZ27-2JTD?
All HZ27-2JTD units undergo pre-shipment inspection (PSI). If there is an issue with HZ27-2JTD, 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 HZ27-2JTD part is unused and in its original packaging.
Return procedure for HZ27-2JTD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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