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Renesas HZS4B1TA-E
- Part No.:
- HZS4B1TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS4B1TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS4B1TA-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 4.0–4.2 V, maximum power dissipation of 400 mW, dynamic resistance ≤100 Ω at 5 mA, and operating junction temperature up to 200°C. It serves as a reference or clamp device in voltage monitoring, overvoltage protection, and biasing circuits for analog ICs and microcontrollers.
For engineers reviewing the HZS4B1TA-E datasheet, HZS4B1TA-E pinout, HZS4B1TA-E application, or HZS4B1TA-E equivalent, this part is selected for stable low-voltage reference generation where tight VZ tolerance (±0.1 V), low leakage (<25 µA at 0.5 V), and high thermal robustness are required in industrial and consumer-grade power management designs.
Technical Context
The HZS4B1TA-E employs a planar-diffused silicon junction optimized for low zener impedance and minimal temperature coefficient drift across its 4.0–4.2 V range. Its electrical behavior is characterized under DC test conditions with IZ = 5 mA, ensuring predictable regulation in linear regulator feedback paths and analog sensor reference circuits.
Designed for surface-mount compatibility with 5 mm-pitch automated insertion, the device uses a glass-passivated MHD package (JEITA code GRZZ0002ZC-A) with cathode band marking and two-terminal axial configuration. It meets Renesas' "Standard" quality grade for use in office equipment, communications gear, and industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.0–4.2 V at IZ = 5 mA - defines precise clamping threshold for 3.3 V/5 V rail monitoring and feedback loops. |
| Power Dissipation (Pd) | 400 mW - supports continuous regulation in compact PCB layouts without forced cooling. |
| Dynamic Resistance (rd) | ≤100 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients. |
| Reverse Leakage (IR) | ≤25 µA at VR = 0.5 V - enables low-quiescent-current operation in battery-backed circuits. |
| Junction Temperature (Tj) | −55°C to +200°C - allows deployment in thermally demanding environments such as motor drives and power converters. |
| Package | MHD (GRZZ0002ZC-A) - 2.0 mm diameter glass-epoxy body with 5 mm lead pitch, compatible with high-speed auto-insertion. |
Pinout & Package
The HZS4B1TA-E is housed in a hermetically sealed MHD package (JEITA code GRZZ0002ZC-A), featuring a cylindrical glass-epoxy body with axial leads and a visible cathode band. The package is rated for manual or automated through-hole mounting with 5 mm pitch spacing and 0.4 mm lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated Output Terminal | Connected to higher-potential node; delivers stable VZ when reverse-biased - must be referenced to system ground or feedback point. |
| 2 (Anode) | Reference Ground Terminal | Common return path for zener current; ties to circuit ground or negative rail to complete regulation loop. |
Key Features
| Feature | Design Value |
|---|---|
| Low Zener Impedance | rd ≤ 100 Ω at 5 mA - maintains voltage stability under varying load currents in feedback networks. |
| Wide VZ Grade Range | B1 grade (4.0–4.2 V) - provides tighter tolerance than A/C grades for improved accuracy in reference applications. |
| High Thermal Robustness | Tj = 200°C max - enables reliable operation near heat-generating components like MOSFETs or transformers. |
| Low Reverse Leakage | IR ≤ 25 µA at 0.5 V - minimizes standby power loss in always-on voltage supervision circuits. |
Applications
| Voltage Reference for ADC/DAC | Overvoltage Clamp in Power Supply |
|---|---|
|
Use Scenario: Providing stable reference voltage to 10–12-bit analog-to-digital converters in data acquisition modules. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt reference, replacing more complex IC references where cost and board space are constrained. Use Value: Delivers ±0.1 V tolerance and <100 Ω dynamic impedance to reduce quantization error and improve measurement repeatability. |
Use Scenario: Protecting downstream LDO regulators and microcontroller I/O pins from transient overvoltage on 5 V supply rails. IC Role / Device Role / Timing Role: Passive shunt clamp limiting rail voltage to 4.2 V during surge events or regulator fault conditions. Use Value: Absorbs up to 400 mW peak power without degradation, preventing latch-up or permanent damage to sensitive logic. |
| Biasing for Op-Amp Circuits | Microcontroller Reset Threshold Detection |
|
Use Scenario: Generating stable bias points for rail-to-rail op-amps in signal conditioning front-ends. IC Role / Device Role / Timing Role: Zener-based voltage divider establishing fixed common-mode input levels for differential amplifiers. Use Value: Maintains consistent offset despite ambient temperature shifts (γZ ~ −0.04 %/°C at 4.2 V), improving DC accuracy. |
Use Scenario: Detecting brown-out conditions on 3.3 V MCU supply rails to trigger hardware reset signals. IC Role / Device Role / Timing Role: Shunt element in comparator input network that asserts reset when VCC drops below 4.0 V. Use Value: Enables deterministic reset activation with fast response (no propagation delay) and no external power dependency. |
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 |
|---|---|---|---|
| 1N4733A (ON Semiconductor) | Same nominal VZ = 5.1 V (not 4.2 V); 1 W Pd; DO-41 package; ±5% tolerance. | Higher power and looser tolerance - suited for general-purpose clamping, not precision reference. | Select only if higher power handling and relaxed accuracy are acceptable; requires layout change due to larger DO-41 footprint. |
| BZX55-C4V3 (Vishay) | VZ = 4.3 V nominal; ±5% tolerance; 500 mW Pd; DO-35 package; rd ≈ 90 Ω. | Slightly higher VZ, wider tolerance, and different package - usable in non-critical biasing but not drop-in replacement. | Consider for cost-sensitive designs where 4.3 V vs. 4.1 V offset is tolerable and DO-35 insertion is supported. |
Compared with 1N4733A and BZX55-C4V3, the HZS4B1TA-E offers tighter VZ tolerance (±0.1 V), lower leakage, and MHD packaging optimized for automated assembly - making it preferable for space-constrained, high-accuracy reference designs where thermal stability and production efficiency matter.
Availability
HZS4B1TA-E is available at Aetrix Electronics and suitable for industrial control systems, consumer power adapters, and embedded sensor modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HZS4B1TA-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 automotive, industrial, and IoT applications.
The HZS Series belongs to Renesas' legacy discrete portfolio targeting cost-effective, thermally robust voltage regulation - developed specifically for high-volume power supply stabilization in standard-grade electronics.
FAQ
What is the exact zener voltage range specified for HZS4B1TA-E?
The HZS4B1TA-E has a guaranteed zener voltage range of 4.0 V to 4.2 V when tested at IZ = 5 mA and Ta = 25°C. This B1 grade designation reflects tighter manufacturing control than A or C grades in the HZS family, making HZS4B1TA-E suitable for applications requiring higher initial accuracy without trimming.
Does HZS4B1TA-E support surface-mount assembly?
No - HZS4B1TA-E uses the MHD through-hole package (JEITA GRZZ0002ZC-A) with axial leads and 5 mm pitch, designed for wave soldering or high-speed automatic insertion. It is not a surface-mount device; for SMD alternatives, consider Renesas' HZ3 series or equivalent SOD-123 Zeners.
What is the maximum reverse leakage current for HZS4B1TA-E?
The maximum reverse leakage current for HZS4B1TA-E is 25 µA at VR = 0.5 V and Ta = 25°C. This low leakage supports energy-efficient operation in always-on monitoring circuits and extends battery life in portable devices using HZS4B1TA-E as a reference element.
Can HZS4B1TA-E be used in automotive applications?
No - HZS4B1TA-E is classified as a "Standard" quality grade device per Renesas documentation and is intended for computers, office equipment, and consumer electronics. It is not qualified for automotive use; for AEC-Q200-compliant Zener diodes, consult Renesas' RAJ or RV4 series.
What is the thermal resistance junction-to-ambient for HZS4B1TA-E?
Renesas does not specify RθJA explicitly for HZS4B1TA-E in the datasheet. However, based on the MHD package construction and 400 mW power rating, typical RθJA is estimated at ~300°C/W on FR-4 with minimal copper area. Derating curves in Figure 3 show Pd reduces to ~200 mW at Ta = 70°C - confirming HZS4B1TA-E's suitability for moderate-temperature environments.
HZS4B1TA-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:
- -
HZS4B1TA-E FAQ
1.How can I place an order for HZS4B1TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS4B1TA-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 HZS4B1TA-E reliable?
The price and inventory of HZS4B1TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS4B1TA-E is usually 5 days.
3.What payment methods are accepted for HZS4B1TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS4B1TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS4B1TA-E?
HZS4B1TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS4B1TA-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 HZS4B1TA-E?
For technical support, including HZS4B1TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS4B1TA-E requirements.
6.How does Aetrix verify that HZS4B1TA-E is sourced from the original manufacturer or authorized distributors?
All HZS4B1TA-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 HZS4B1TA-E meets industry standards.
7.What is the process for return or replacement of HZS4B1TA-E?
All HZS4B1TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS4B1TA-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 HZS4B1TA-E part is unused and in its original packaging.
Return procedure for HZS4B1TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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