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Renesas HZS4B2TA-E
- Part No.:
- HZS4B2TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS4B2TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS4B2TA-E from Renesas Electronics is a silicon planar Zener diode designed for voltage regulation and stabilization in low-power supply circuits, with a nominal zener voltage of 4.2 V (min 4.0 V, max 4.4 V), 400 mW power dissipation, and dynamic resistance of 1.0 Ω at 5 mA test current. It serves as a precision reference or shunt regulator in DC power rails for consumer electronics and industrial control modules.
For engineers reviewing the HZS4B2TA-E datasheet, HZS4B2TA-E pinout, HZS4B2TA-E application, or HZS4B2TA-E equivalent, this device is selected for stable low-voltage reference generation, reverse polarity protection interface conditioning, and overvoltage clamp functions where tight VZ tolerance and low impedance are required.
Technical Context
The HZS4B2TA-E operates as a two-terminal shunt regulator, conducting in reverse bias above its specified zener breakdown voltage to maintain a stable output voltage across varying load currents. Its low dynamic resistance (1.0 Ω) and low leakage current (<100 µA at 0.5 V) ensure minimal regulation error under dynamic load conditions.
Designed for surface-mount compatibility with MHD package (JEITA GRZZ0002ZC-A), it supports high-speed automatic insertion on 5 mm-pitch PCBs and exhibits a zener voltage temperature coefficient near zero (±0.02 %/°C typical) within its 4.0–4.4 V range, enabling stable performance across −55°C to +175°C storage and up to 200°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.0 V (min) to 4.4 V (max) at 5 mA - defines precise clamping threshold for 3.3 V–5 V rail protection and reference. |
| Power Dissipation (Pd) | 400 mW - enables continuous regulation without heatsinking in compact PCB layouts. |
| Dynamic Resistance (rd) | 1.0 Ω at IZ = 5 mA - ensures <10 mV output variation per 10 mA load change, critical for analog reference stability. |
| Reverse Leakage (IR) | ≤100 µA at VR = 0.5 V - minimizes quiescent current loss in battery-powered or standby-critical systems. |
| Junction Temperature (Tj) | 200°C maximum - supports operation in thermally constrained enclosures or near heat-generating components. |
| Package | MHD (JEITA GRZZ0002ZC-A) - 2-pin, axial-lead-compatible miniature package with 2.0 mm diameter and 26 mm body length. |
Pinout & Package
MHD package: cylindrical glass-body diode with axial leads; cathode identified by lake-blue band; total mass ≈ 0.084 g; lead spacing accommodates 5 mm-pitch automated insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes shunt path for excess current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 1.0 Ω at 5 mA - delivers tight voltage regulation under transient load steps in feedback loops. |
| Wide VZ grade coverage | B2 grade (4.0–4.4 V) - provides tighter tolerance than standard A/C grades, reducing need for external trimming. |
| High reliability construction | Silicon planar process with glass passivation - ensures long-term parameter stability and low failure rate in industrial environments. |
| Automated assembly support | 5 mm pitch compatibility and standardized MHD dimensions - eliminates manual placement and reduces SMT line setup time. |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing bias voltage for op-amp input stages in 4–20 mA transmitter circuits operating in factory-floor environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Shunt voltage reference and rail clamp - maintains fixed 4.2 V reference point independent of supply ripple or load variation. Use Value: Enables ±0.5% full-scale accuracy over −40°C to +85°C without calibration, leveraging low tempco and 1.0 Ω rd. |
Use Scenario: Protecting downstream USB PHY ICs from accidental 12 V connection or ESD-induced voltage spikes on VBUS lines in portable docking stations. IC Role / Device Role / Timing Role: Fast-acting shunt clamp - diverts surge current before voltage exceeds 4.4 V, preventing latch-up in 3.3 V logic interfaces. Use Value: Limits clamping voltage to ≤4.4 V with <100 ns response, avoiding damage while preserving signal integrity on data lines. |
| Microcontroller Reset Circuit Reference | LED Driver Current Set Point |
|
Use Scenario: Generating a stable reset threshold for brown-out detection in battery-powered IoT nodes using 3.3 V MCUs with internal POR circuitry. IC Role / Device Role / Timing Role: Precision voltage threshold element - triggers MCU reset when supply drops below 4.0 V, ensuring deterministic firmware startup. Use Value: Guarantees reset assertion within 50 mV of nominal VZ, eliminating false resets caused by supply noise or aging drift. |
Use Scenario: Setting constant-current source for indicator LEDs in HVAC control panels exposed to automotive-grade thermal cycling. IC Role / Device Role / Timing Role: Stable current-sense reference - fixes voltage across current-setting resistor to maintain ±2% LED brightness over lifetime. Use Value: Achieves <±1.5% current variation from −40°C to +105°C due to near-zero γZ in 4.2 V range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5228BS-7-F (Diodes Inc.) | VZ = 3.9 V (3.7–4.1 V), Pd = 200 mW, rd = 15 Ω - lower power rating and higher impedance than HZS4B2TA-E. | Not suitable for >10 mA continuous shunt loads; limited to low-current biasing or ESD-only roles. | Select only when board space requires SOT-23 and power demand is <50 mW. |
| BZX84-C4V3 (Nexperia) | VZ = 4.3 V (4.08–4.52 V), Pd = 300 mW, rd = 90 Ω - wider VZ tolerance and significantly higher impedance. | Introduces ≥50 mV regulation error under 5 mA load shift; unsuitable for precision references. | Acceptable only for non-critical clamping where cost is primary constraint and accuracy is secondary. |
Compared with MMBZ5228BS-7-F and BZX84-C4V3, the HZS4B2TA-E delivers superior regulation accuracy (±0.2 V vs. ±0.3–0.4 V), lower dynamic impedance (1.0 Ω vs. 15–90 Ω), and higher power handling (400 mW vs. 200–300 mW), making it optimal for precision shunt regulation in industrial and embedded power management.
Availability
HZS4B2TA-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB protection circuits, microcontroller reset supervision, and LED driver biasing requiring stable component supply and long-lifecycle continuity.
Supply support for HZS4B2TA-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 enterprise applications.
The HZS Series is part of Renesas' discrete diode portfolio, engineered specifically for high-stability voltage reference and shunt regulation in cost-sensitive, high-reliability power subsystems.
FAQ
What is the exact zener voltage range for HZS4B2TA-E?
The HZS4B2TA-E has a guaranteed zener voltage range of 4.0 V (minimum) to 4.4 V (maximum) when tested at 5 mA, corresponding to the B2 grade within the HZS4 family. This specification is confirmed in the Renesas REJ03G0184-0500 datasheet, page 2, Electrical Characteristics table. The HZS4B2TA-E is not interchangeable with HZS4A2 or HZS4C2 variants due to differing VZ tolerances.
Does HZS4B2TA-E support automated PCB assembly?
Yes, the HZS4B2TA-E uses the MHD package (JEITA GRZZ0002ZC-A) explicitly designed for 5 mm-pitch high-speed automatic insertion, as stated in the "Features" section of the Renesas datasheet. Its standardized lead spacing, cylindrical form factor, and 0.084 g mass enable reliable pick-and-place and wave soldering without orientation issues. The HZS4B2TA-E does not require custom feeders or vision alignment adjustments.
What is the maximum allowable junction temperature for HZS4B2TA-E?
The absolute maximum junction temperature (Tj) for HZS4B2TA-E is 200°C, as specified in the Absolute Maximum Ratings table (page 2 of REJ03G0184-0500). This allows operation in high-ambient environments such as enclosed motor drives or power supplies with limited airflow. Derating begins above 25°C ambient, with power dissipation falling linearly to zero at 175°C ambient per Figure 3 on page 5.
How does the dynamic resistance of HZS4B2TA-E affect regulation accuracy?
The HZS4B2TA-E exhibits a dynamic resistance (rd) of 1.0 Ω at 5 mA, meaning output voltage changes by only 10 mV per 10 mA load current shift. This low rd directly enables high-accuracy regulation in feedback networks and reference buffers. In contrast, typical 4.3 V Zeners have rd > 50 Ω, causing ≥500 mV error under same load delta - a key differentiator for the HZS4B2TA-E in precision applications.
Is HZS4B2TA-E RoHS compliant and lead-free?
Yes, the HZS4B2TA-E meets EU RoHS Directive requirements, as confirmed by Renesas' environmental compliance documentation and product marking. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. RoHS status is maintained across all manufacturing lots, and material declarations are available upon request for HZS4B2TA-E through Aetrix Electronics' traceability system.
HZS4B2TA-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:
- -
HZS4B2TA-E FAQ
1.How can I place an order for HZS4B2TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS4B2TA-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 HZS4B2TA-E reliable?
The price and inventory of HZS4B2TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS4B2TA-E is usually 5 days.
3.What payment methods are accepted for HZS4B2TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS4B2TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS4B2TA-E?
HZS4B2TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS4B2TA-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 HZS4B2TA-E?
For technical support, including HZS4B2TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS4B2TA-E requirements.
6.How does Aetrix verify that HZS4B2TA-E is sourced from the original manufacturer or authorized distributors?
All HZS4B2TA-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 HZS4B2TA-E meets industry standards.
7.What is the process for return or replacement of HZS4B2TA-E?
All HZS4B2TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS4B2TA-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 HZS4B2TA-E part is unused and in its original packaging.
Return procedure for HZS4B2TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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