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Renesas HZS27-3TD-E
- Part No.:
- HZS27-3TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS27-3TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZS27-3TD-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 27.2–28.6 V at 2 mA test current, 400 mW power dissipation, and dynamic resistance of 21.0 Ω - deployed in industrial control power rails and analog sensor reference circuits.
For engineers reviewing the HZS27-3TD-E datasheet, HZS27-3TD-E pinout, HZS27-3TD-E application, or HZS27-3TD-E equivalent, this page delivers verified electrical specifications, package geometry, thermal derating behavior, cathode/anode terminal roles, and direct alternative options for voltage reference design continuity.
Technical Context
The HZS27-3TD-E operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across varying load currents by conducting reverse-biased zener breakdown. Its 27.2–28.6 V zener range targets mid-to-high-voltage reference needs where ±5% tolerance and low temperature coefficient (−0.04 %/°C typical) are critical.
It features low leakage (<1 µA at VR = 20.9 V), low dynamic impedance (21.0 Ω at IZ = 2 mA), and junction temperature rating up to 200°C - enabling reliable operation in thermally constrained PCB layouts and ambient temperatures up to +125°C with appropriate derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27.2–28.6 V at IZ = 2 mA - defines precise clamping threshold for overvoltage protection and reference generation. |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous power handling before thermal shutdown or degradation. |
| Dynamic Resistance (rd) | 21.0 Ω at IZ = 2 mA - determines regulation stiffness; lower value improves line/load regulation accuracy. |
| Reverse Leakage Current (IR) | <1 µA at VR = 20.9 V - ensures minimal quiescent current draw in standby or low-power modes. |
| Junction Temperature (Tj) | 200°C maximum - supports high-reliability operation in enclosed enclosures or near heat-generating components. |
| Temperature Coefficient (γZ) | −0.04 %/°C typical - enables predictable drift compensation in wide-temperature-range instrumentation. |
Pinout & Package
Package: MHD (Mini-High-Density) molded plastic case with 5 mm pitch, 2.0 mm diameter body (φD), 26.0 mm lead length (L), and 0.4 mm lead diameter (φb). Cathode identified by lake-blue band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; reverse-bias voltage applied here to initiate zener conduction. |
| 2 | Anode | Connected to circuit ground or lowest potential reference; completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 21.0 Ω enables tight voltage regulation under dynamic load transients in feedback loops. |
| Wide zener voltage spectrum | 27.2–28.6 V range supports compatibility with 24 V industrial bus systems requiring margin above nominal rail. |
| High junction temperature rating | 200°C allows placement near power MOSFETs or transformers without thermal derating penalties. |
| Low leakage current | <1 µA at 20.9 V minimizes error in high-impedance reference dividers and battery-backed circuits. |
| 5 mm pitch compatibility | Enables automated insertion in legacy through-hole manufacturing lines without retooling. |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 27.5 V setpoint to TL431 error amplifier input. Use Value: Maintains ±1.5% output regulation across −40°C to +85°C ambient with no external compensation. |
Use Scenario: Protecting microcontroller GPIO pins from transient surges on 24 V field wiring. IC Role / Device Role / Timing Role: Fast-acting clamp limiting voltage to ≤28.6 V during ESD or inductive kick events. Use Value: Responds within nanoseconds to suppress >1 kV transients without latch-up or parametric shift. |
| Automated Test Equipment (ATE) Calibration | Analog Sensor Excitation Reference |
|
Use Scenario: Providing traceable voltage reference for 16-bit DAC calibration in benchtop multimeters. IC Role / Device Role / Timing Role: Precision shunt reference replacing bulkier IC-based references in compact ATE backplanes. Use Value: Delivers <±0.5% initial tolerance and <50 ppm/°C drift over calibration temperature range. |
Use Scenario: Biasing bridge sensors in weigh-scale load cells operating from unregulated 24 V supply. IC Role / Device Role / Timing Role: Stable excitation source ensuring consistent bridge output sensitivity across temperature. Use Value: Enables 0.02% full-scale measurement repeatability without active regulation circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5258BRLG | Zener voltage 27 V ±5%, Pd = 500 mW, rd = 35 Ω, DO-35 package (3.2 mm length). | Higher power but larger footprint; less suitable for dense industrial PCBs with strict height constraints. | Choose when higher surge energy absorption is required and board space permits larger axial package. |
| BZX55-C27 | Zener voltage 27 V ±5%, Pd = 500 mW, rd = 30 Ω, DO-35 package, wider temp coefficient (±0.08 %/°C). | Lower cost but reduced thermal stability; requires additional compensation in precision sensor interfaces. | Choose for cost-sensitive consumer-grade power rails where ±0.1% drift over temperature is acceptable. |
Compared with 1N5258BRLG and BZX55-C27, the HZS27-3TD-E offers tighter dynamic impedance (21.0 Ω vs. ≥30 Ω), smaller MHD package (2.0 mm φ vs. 3.2 mm DO-35), and superior temperature coefficient (−0.04 %/°C), making it optimal for space-constrained, high-stability industrial references.
Availability
HZS27-3TD-E is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, automated test equipment calibration, and analog sensor excitation reference requiring stable component supply and long-term obsolescence management.
Supply support for HZS27-3TD-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 global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZS Series is part of Renesas' discrete voltage reference portfolio, engineered for high-reliability stabilized power supply applications demanding low leakage, low impedance, and extended temperature operation.
FAQ
What is the exact zener voltage range for HZS27-3TD-E?
The HZS27-3TD-E has a guaranteed zener voltage range of 27.2 V to 28.6 V when tested at IZ = 2 mA and Ta = 25°C. This 1.4 V span reflects its "-3" grade designation per the HZS Series specification table on page 4 of REJ03G0184-0500 Rev.5.00. The HZS27-3TD-E maintains this tolerance across its rated junction temperature range.
Does HZS27-3TD-E support automatic insertion in production?
Yes, the HZS27-3TD-E uses the MHD package with 5 mm lead pitch, explicitly designed for high-speed automatic insertion as stated in the "Features" section of the datasheet. Its standardized lead spacing and 26.0 mm lead length ensure compatibility with standard pick-and-place and axial insertion equipment used in industrial electronics manufacturing.
What is the maximum allowable ambient temperature for continuous operation of HZS27-3TD-E?
The HZS27-3TD-E can operate continuously at ambient temperatures up to +125°C when power dissipation is derated per Figure 3 ("Power Dissipation vs. Ambient Temperature") in the datasheet. At +125°C, its usable power drops to approximately 200 mW - half the 400 mW rating at 25°C - ensuring safe junction temperature below 200°C.
Is HZS27-3TD-E RoHS compliant?
Yes, HZS27-3TD-E complies with the EU RoHS Directive, as confirmed by Renesas' environmental compliance documentation and material declarations. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits, and is suitable for use in environmentally regulated industrial and commercial equipment.
How does the temperature coefficient of HZS27-3TD-E affect long-term stability?
The HZS27-3TD-E exhibits a typical zener voltage temperature coefficient of −0.04 %/°C, meaning its output shifts downward by ~11 mV per °C rise near 27.5 V. This low drift enables stable performance in unheated enclosures and eliminates need for external compensation in most industrial applications - a key advantage over alternatives with ±0.08 %/°C coefficients.
HZS27-3TD-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:
- -
HZS27-3TD-E FAQ
1.How can I place an order for HZS27-3TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS27-3TD-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 HZS27-3TD-E reliable?
The price and inventory of HZS27-3TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS27-3TD-E is usually 5 days.
3.What payment methods are accepted for HZS27-3TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS27-3TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS27-3TD-E?
HZS27-3TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS27-3TD-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 HZS27-3TD-E?
For technical support, including HZS27-3TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS27-3TD-E requirements.
6.How does Aetrix verify that HZS27-3TD-E is sourced from the original manufacturer or authorized distributors?
All HZS27-3TD-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 HZS27-3TD-E meets industry standards.
7.What is the process for return or replacement of HZS27-3TD-E?
All HZS27-3TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS27-3TD-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 HZS27-3TD-E part is unused and in its original packaging.
Return procedure for HZS27-3TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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