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Renesas HZS27NB1TD-E
- Part No.:
- HZS27NB1TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS27NB1TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:229,577
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Product details
Overview
HZS27NB1TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 27.0 V (min 26.99 V, max 28.39 V), 400 mW power dissipation, 21 Ω dynamic resistance at 5 mA, and low leakage current ≤0.2 μA at 21.6 V.
For engineers reviewing the HZS27NB1TD-E datasheet, HZS27NB1TD-E pinout, HZS27NB1TD-E application, or HZS27NB1TD-E equivalent, this device serves as a compact, high-stability reference element in low-power analog circuits, voltage clamping networks, and overvoltage protection stages where tight tolerance and thermal stability are required.
Technical Context
The HZS27NB1TD-E operates as a two-terminal voltage reference using avalanche breakdown in its silicon planar junction. It exhibits a positive zener voltage temperature coefficient of +0.065 %/°C (≈+17.6 mV/°C) near 27 V, enabling predictable drift compensation in bias networks.
Rated for 200°C junction temperature and –55°C to +175°C storage range, it supports operation in industrial ambient conditions up to 100°C with derated power dissipation per Fig.3, and is qualified under Renesas "Standard" quality grade for office equipment, communications gear, and test instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.99–28.39 V at IZ = 5 mA - defines stable regulation window for feedback or reference use |
| Power Dissipation (Pd) | 400 mW - sets maximum continuous DC or pulsed power handling on standard PCB |
| Dynamic Resistance (rd) | 21 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage (IR) | ≤0.2 μA at VR = 21.6 V - ensures minimal error current in high-impedance reference paths |
| Junction Temperature (Tj) | 200°C - enables reliable operation in thermally constrained enclosures or near heat sources |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - 5 mm pitch, axial lead, 2.0 mm diameter glass body for automated insertion |
Pinout & Package
Package: MHD - axial-leaded, glass-encapsulated, 2.0 mm diameter × 26.0 mm length, cathode band marked, mass 0.084 g, JEITA code GRZZ0002ZC-A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to higher potential node in reverse-biased configuration; carries regulated current into load |
| 2 (Anode) | Zener cathode connection point | Connected to circuit ground or lower potential reference; completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 21 Ω at 5 mA enables stable regulation under varying load currents without external buffering |
| Wide zener voltage range | 27.0 V nominal fits mid-range supply rail monitoring and clamp thresholds in 24 V systems |
| High thermal stability | +0.065 %/°C tempco allows predictable drift compensation in temperature-critical references |
| Automated assembly compatibility | 5 mm pitch and MHD package support high-speed insertion in production PCB assembly lines |
Applications
| Overvoltage Protection Circuit | Voltage Reference for ADC Bias |
|---|---|
Use Scenario: Clamp transient surges on 24 V DC input rails in industrial controllers to prevent damage to downstream regulators and microcontrollers. IC Role / Device Role / Timing Role: Zener diode acts as shunt regulator, conducting excess current when input exceeds 27.0 V threshold. Use Value: Limits peak voltage to ≤28.4 V with <0.2 μA leakage below clamp point, preserving signal integrity and component reliability. | Use Scenario: Provide stable 27.0 V reference for scaling analog sensor outputs before digitization in data acquisition modules. IC Role / Device Role / Timing Role: Functions as precision voltage source for ADC reference divider network or op-amp biasing. Use Value: Enables ±1.5% full-scale accuracy over 0–70°C due to low tempco and 21 Ω rd minimizing loading error. |
| Power Supply Feedback Network | LED Current Regulation |
Use Scenario: Set output voltage in isolated flyback converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Provides accurate, low-drift reference voltage for TL431-type error amplifier biasing. Use Value: Maintains ±2% output regulation across line/load/temperature with minimal drift-induced offset in feedback path. | Use Scenario: Stabilize forward current in high-brightness LED strings powered from unregulated 30 V DC bus. IC Role / Device Role / Timing Role: Acts as shunt regulator to divert excess current away from LEDs when bus voltage rises. Use Value: Limits LED current variation to <5% over 24–30 V input range, extending luminous life and reducing thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5258BRLG | 27 V nominal, 500 mW Pd, 35 Ω rd, DO-35 package | Higher power but larger dynamic resistance reduces regulation precision in low-current references | Preferred where higher surge energy absorption is needed, not for high-accuracy biasing |
| BZX55-C27 | 27 V nominal, 500 mW Pd, 35 Ω rd, DO-35 package, ±5% tolerance | Looser VZ tolerance (±5% vs. ±2.6%) and higher rd limit use in precision feedback | Suitable for general-purpose clamping where cost and availability outweigh precision needs |
Compared with 1N5258BRLG and BZX55-C27, the HZS27NB1TD-E offers tighter VZ tolerance (±2.6%), lower rd (21 Ω), and optimized thermal coefficient for stable reference design-making it preferable for feedback networks and analog measurement circuits requiring long-term accuracy.
Availability
HZS27NB1TD-E is available at Aetrix Electronics and suitable for stabilized power supplies, voltage reference circuits, and overvoltage protection systems requiring stable component supply, consistent parametric performance, and industrial-grade reliability.
Supply support for HZS27NB1TD-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and communications markets.
The HZS-N Series is part of Renesas' discrete voltage reference portfolio, engineered for high-stability, low-noise zener regulation in power management and signal conditioning applications where precision and repeatability are critical.
FAQ
What is the zener voltage tolerance of HZS27NB1TD-E?
The HZS27NB1TD-E has a zener voltage range of 26.99 V to 28.39 V at 5 mA test current, corresponding to a ±2.6% tolerance around the nominal 27.0 V rating. This tight tolerance is specified per the B1 grade in the HZS-N Series datasheet and ensures predictable regulation behavior in feedback and reference circuits without additional trimming.
Does HZS27NB1TD-E support automatic insertion during PCB assembly?
Yes, HZS27NB1TD-E uses the MHD package (JEITA GRZZ0002ZC-A) with 5 mm lead pitch and axial leads, explicitly designed for high-speed automatic insertion equipment. Its standardized dimensions-including 2.0 mm body diameter and 26.0 mm length-ensure compatibility with industry-standard pick-and-place and wave soldering processes.
What is the maximum reverse leakage current for HZS27NB1TD-E?
The maximum reverse leakage current for HZS27NB1TD-E is 0.2 μA at VR = 21.6 V, as specified in the Electrical Characteristics table on page 4 of the REJ03G0185-0300 datasheet. This ultra-low leakage minimizes error in high-impedance reference nodes and preserves accuracy in battery-powered or low-power analog circuits.
Can HZS27NB1TD-E be used in automotive applications?
No, HZS27NB1TD-E is classified under Renesas' "Standard" quality grade, intended for computers, office equipment, communications gear, and test instruments-not automotive or safety-critical systems. It lacks AEC-Q200 qualification and is not rated for extended temperature cycling or vibration requirements typical of vehicle ECUs.
What is the thermal coefficient of HZS27NB1TD-E and how does it affect circuit design?
HZS27NB1TD-E has a zener voltage temperature coefficient of +0.065 %/°C (≈+17.6 mV/°C), as shown in Fig.2 of the datasheet. This positive drift means VZ increases ~17.6 mV per °C rise-requiring compensation in precision references, but also enabling predictable bias adjustment in temperature-sensing or compensation networks.
HZS27NB1TD-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:
- -
HZS27NB1TD-E FAQ
1.How can I place an order for HZS27NB1TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS27NB1TD-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 HZS27NB1TD-E reliable?
The price and inventory of HZS27NB1TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS27NB1TD-E is usually 5 days.
3.What payment methods are accepted for HZS27NB1TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS27NB1TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS27NB1TD-E?
HZS27NB1TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS27NB1TD-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 HZS27NB1TD-E?
For technical support, including HZS27NB1TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS27NB1TD-E requirements.
6.How does Aetrix verify that HZS27NB1TD-E is sourced from the original manufacturer or authorized distributors?
All HZS27NB1TD-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 HZS27NB1TD-E meets industry standards.
7.What is the process for return or replacement of HZS27NB1TD-E?
All HZS27NB1TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS27NB1TD-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 HZS27NB1TD-E part is unused and in its original packaging.
Return procedure for HZS27NB1TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS27NB1TD-E Tags
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MMSZ4682T1G
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MM5Z5V1ST1G
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