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Renesas HZS4A1TD-E
- Part No.:
- HZS4A1TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS4A1TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZS4A1TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 4.3–4.5 V at 5 mA test current, 400 mW maximum power dissipation, and dynamic resistance of ≤1.0 Ω - deployed in voltage reference circuits for microcontroller reset supervision and sensor biasing.
For engineers reviewing the HZS4A1TD-E datasheet, HZS4A1TD-E pinout, HZS4A1TD-E application, or HZS4A1TD-E equivalent, this part serves as a low-leakage, low-impedance voltage reference in space-constrained industrial control modules, analog front-ends, and embedded power monitoring circuits where stable 4.4 V regulation under 5 mA is required.
Technical Context
The HZS4A1TD-E operates as a two-terminal, DC-biased voltage reference using silicon planar junction technology, optimized for low dynamic impedance (≤1.0 Ω at IZ = 5 mA) and tight zener voltage tolerance (±0.1 V at 4.4 V nominal). Its thermal coefficient is −0.04 %/°C near 4.4 V, minimizing drift across ambient temperatures.
It is rated for continuous operation up to 200°C junction temperature and supports automatic insertion via 5 mm pitch PCB layout. The device exhibits reverse leakage current ≤5 µA at VR = 1.0 V and maintains stable regulation down to 0.5 mA minimum test current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3–4.5 V at IZ = 5 mA - defines precise regulation point for 3.3 V/5 V system references. |
| Power Dissipation (Pd) | 400 mW - enables use in compact SMT-compatible through-hole packages without forced cooling. |
| Dynamic Resistance (rd) | ≤1.0 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients. |
| Reverse Leakage (IR) | ≤5 µA at VR = 1.0 V - reduces quiescent current in battery-backed or low-power monitoring circuits. |
| Junction Temperature (Tj) | −55 to +200°C - supports operation in harsh industrial environments including motor drives and power converters. |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - axial-lead, 2.0 mm diameter, 26 mm body length, compatible with high-speed auto-insertion. |
Pinout & Package
MHD package: axial-lead, glass-passivated silicon planar construction, cathode band marked on body, lead spacing 5 mm standard pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated positive rail; reverse-biased terminal during normal zener operation. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential node; completes current path for zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low Zener Impedance | ≤1.0 Ω at 5 mA - delivers stable reference voltage despite input ripple or load shifts in LDO pre-regulators. |
| Wide Zener Voltage Range | 1.6–38 V family coverage - allows design reuse across multiple supply rails without topology change. |
| High-Temperature Operation | 200°C max junction rating - suitable for under-hood automotive modules and industrial power supplies. |
| Low Leakage Current | ≤5 µA at 1.0 V reverse bias - preserves battery life in always-on sensor nodes and watchdog circuits. |
Applications
| Microcontroller Reset Circuit | Sensor Bias Reference |
|---|---|
|
Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers during power-up and brownout conditions. IC Role / Device Role / Timing Role: Zener diode provides fixed 4.4 V reference to comparator input in reset generator IC or discrete RC-reset network. Use Value: Tight ±0.1 V tolerance and low rd ensure deterministic reset assertion timing across −40°C to +85°C ambient. |
Use Scenario: Supplying stable bias voltage to analog sensors (e.g., pressure transducers, thermistors) requiring excitation within ±1% accuracy. IC Role / Device Role / Timing Role: Functions as passive voltage reference in Wheatstone bridge excitation or op-amp reference input. Use Value: 400 mW power rating and −0.04 %/°C tempco enable <0.5% total error over full industrial temperature range. |
| Industrial Power Monitor | LED Driver Current Setpoint |
|
Use Scenario: Monitoring 5 V rail integrity in PLC I/O modules by comparing against zener-derived threshold before enabling digital outputs. IC Role / Device Role / Timing Role: Serves as precision shunt reference for voltage supervisor IC or ADC input scaling network. Use Value: Low leakage (<5 µA) prevents loading of monitored rail; MHD package allows direct PCB mounting near measurement point. |
Use Scenario: Setting constant-current limit in linear LED driver stages where reference voltage determines sense resistor drop. IC Role / Device Role / Timing Role: Provides fixed 4.4 V reference to current-sense amplifier or op-amp feedback node. Use Value: ≤1.0 Ω dynamic resistance minimizes current drift due to supply ripple, improving LED brightness stability. |
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 |
|---|---|---|---|
| 1N4733A (ON Semiconductor) | 5.1 V nominal, 1.0 W rating, DO-41 package, rd = 9 Ω - higher voltage, higher power, higher impedance. | Used in higher-voltage regulator feedback loops; not interchangeable without circuit redesign. | Select only if 5.1 V reference and >400 mW dissipation are required; requires layout change due to DO-41 footprint. |
| BZX55-C4V3 (Vishay) | 4.3 V nominal, ±5% tolerance (vs. HZS4A1TD-E's ±0.1 V), 500 mW rating, DO-35 package, rd = 25 Ω. | Acceptable for non-critical biasing; unsuitable for precision reset or sensor excitation. | Choose for cost-sensitive, non-precision applications; verify tempco and leakage meet system requirements. |
Compared with 1N4733A and BZX55-C4V3, the HZS4A1TD-E offers tighter voltage tolerance (±0.1 V), lower dynamic impedance (≤1.0 Ω), and superior thermal stability (−0.04 %/°C), making it optimal for precision reset supervision and analog sensor biasing where regulation accuracy directly impacts system reliability.
Availability
HZS4A1TD-E is available at Aetrix Electronics and suitable for industrial control systems, sensor signal conditioning modules, and embedded power monitoring circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for HZS4A1TD-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 manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZS Series was developed as a family of precision silicon planar Zener diodes targeting stabilized power supply and voltage reference applications in space- and cost-constrained industrial electronics.
FAQ
What is the exact zener voltage range specified for HZS4A1TD-E?
The HZS4A1TD-E has a guaranteed zener voltage range of 4.3 V to 4.5 V when tested at IZ = 5 mA and Ta = 25°C. This 0.2 V span reflects its "A1" grade designation within the HZS4 family and ensures predictable regulation in precision reference designs where ±0.1 V tolerance is critical.
Is HZS4A1TD-E suitable for surface-mount assembly?
No - HZS4A1TD-E uses the MHD axial-lead package (JEITA GRZZ0002ZC-A), designed specifically for through-hole mounting and high-speed automatic insertion with 5 mm pitch. It is not a surface-mount device; no SMD variant exists for this specific grade and voltage.
What is the maximum reverse leakage current for HZS4A1TD-E at 1.0 V?
The maximum reverse leakage current for HZS4A1TD-E is 5 µA when measured at VR = 1.0 V and Ta = 25°C. This low leakage supports energy-efficient operation in always-on monitoring circuits and extends battery life in portable industrial sensors.
Does HZS4A1TD-E have a specified temperature coefficient?
Yes - the HZS4A1TD-E exhibits a zener voltage temperature coefficient of −0.04 %/°C near its 4.4 V operating point, as confirmed by Figure 2 in the official Renesas datasheet REJ03G0184-0500. This value enables accurate prediction of voltage drift across −40°C to +125°C ambient ranges.
Can HZS4A1TD-E replace a 4.7 V Zener diode in an existing design?
No - HZS4A1TD-E is rated for 4.3–4.5 V, not 4.7 V. Substituting it for a 4.7 V part would shift the regulation point downward by ~200–400 mV, potentially causing undervoltage faults in reset circuits or incorrect sensor biasing. Always verify voltage match before replacement.
HZS4A1TD-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:
- -
HZS4A1TD-E FAQ
1.How can I place an order for HZS4A1TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS4A1TD-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 HZS4A1TD-E reliable?
The price and inventory of HZS4A1TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS4A1TD-E is usually 5 days.
3.What payment methods are accepted for HZS4A1TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS4A1TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS4A1TD-E?
HZS4A1TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS4A1TD-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 HZS4A1TD-E?
For technical support, including HZS4A1TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS4A1TD-E requirements.
6.How does Aetrix verify that HZS4A1TD-E is sourced from the original manufacturer or authorized distributors?
All HZS4A1TD-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 HZS4A1TD-E meets industry standards.
7.What is the process for return or replacement of HZS4A1TD-E?
All HZS4A1TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS4A1TD-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 HZS4A1TD-E part is unused and in its original packaging.
Return procedure for HZS4A1TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS4A1TD-E Tags
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BZT52C5V6T-7
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MMSZ4682T1G
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MM5Z5V1ST1G
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