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Renesas HZS3A2TD-E
- Part No.:
- HZS3A2TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS3A2TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS3A2TD-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 3.5 V (min 3.5 V, max 3.7 V), 400 mW power dissipation, and dynamic resistance of 5 Ω at 5 mA test current. It features low leakage current (≤25 µA at 0.5 V), operates up to 200°C junction temperature, and is packaged in the MHD (JEITA GRZZ0002ZC-A) axial leaded package for high-speed automatic insertion.
For engineers reviewing the HZS3A2TD-E datasheet, HZS3A2TD-E pinout, HZS3A2TD-E application, or HZS3A2TD-E equivalent, key selection considerations include its 3.5 V zener voltage tolerance, 5 Ω dynamic impedance at 5 mA, −55°C to +175°C storage temperature range, and suitability for space-constrained industrial power rail clamping and reference circuits requiring stable low-voltage regulation.
Technical Context
This device functions as a two-terminal voltage reference using avalanche and Zener breakdown mechanisms optimized for 3.5 V operation. Its low dynamic resistance (5 Ω) ensures minimal output voltage variation under load changes, while the 400 mW power rating supports continuous DC regulation without forced cooling in ambient temperatures up to 70°C.
The MHD package features 5 mm pitch leads compatible with automated through-hole insertion equipment, and its silicon planar construction delivers consistent zener voltage distribution across production lots. The −55°C to +175°C storage temperature range enables use in extended-environment industrial control modules and automotive under-hood auxiliary circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.5 V (min 3.5 V, max 3.7 V at IZ = 5 mA) - defines precise clamping threshold for 3.3 V system rails. |
| Power Dissipation (Pd) | 400 mW - supports continuous regulation in compact PCB layouts without heatsinking up to 70°C ambient. |
| Dynamic Resistance (rd) | 5 Ω at IZ = 5 mA - ensures <±15 mV output shift per ±75 mA load change in feedback paths. |
| Reverse Leakage (IR) | ≤25 µA at VR = 0.5 V - minimizes quiescent current loss in battery-backed sensor references. |
| Junction Temperature (Tj) | 200°C - allows operation in thermally demanding environments such as motor drive control boards. |
| Storage Temperature | −55°C to +175°C - qualified for deployment in industrial automation enclosures with wide thermal cycling. |
Pinout & Package
Package: MHD (JEITA GRZZ0002ZC-A), axial-leaded, 2.0 mm diameter body, 26.0 mm length, 5 mm lead pitch, paper-phenol PCB mount. Mass: 0.084 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference terminal | Connected to regulated output node; polarity must be observed to enable reverse-bias conduction. |
| 2 (Anode) | Reference ground return | Provides low-impedance path to circuit common; cathode band marking identifies this terminal orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 5 Ω at 5 mA - maintains tight voltage regulation under dynamic load transients in SMPS feedback networks. |
| Wide zener voltage spectrum | 3.5 V nominal (3.5–3.7 V range) - matches standard 3.3 V logic supply tolerances with margin for aging drift. |
| High reliability construction | Silicon planar process with 200°C max junction temperature - ensures long-term stability in sealed industrial enclosures. |
| Automated assembly compatibility | 5 mm pitch MHD package - enables high-throughput placement on legacy through-hole production lines. |
Applications
| Industrial Power Monitoring | IoT Sensor Reference |
|---|---|
Use Scenario: Voltage supervision in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Zener diode providing stable 3.5 V reference for ADC biasing and overvoltage clamp. Use Value: 5 Ω dynamic resistance prevents reference droop during multiplexed channel sampling, ensuring ≤0.5 LSB error across 12-bit conversions. |
Use Scenario: Precision voltage reference in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Low-leakage (≤25 µA) zener regulating reference for op-amp signal conditioning stages. Use Value: Sub-µA standby current draw extends 10-year battery life in wireless node deployments without compromising accuracy. |
| Automotive Body Control | Medical Diagnostic Equipment |
Use Scenario: Overvoltage protection on LIN bus transceiver power rails in door module ECUs. IC Role / Device Role / Timing Role: Clamping diode limiting supply spikes to 3.7 V during load dump events. Use Value: 400 mW rating absorbs 100 ms transient surges without degradation, meeting ISO 7637-2 Pulse 1/2 immunity requirements. |
Use Scenario: Calibration reference in portable ECG front-end amplifiers. IC Role / Device Role / Timing Role: Stable 3.5 V reference source for gain-setting resistors and offset trimming. Use Value: ±0.2 V zener voltage tolerance over temperature ensures <±0.5% full-scale accuracy in clinical-grade signal chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | Zener voltage 3.3 V (±5%), 1.0 W power rating, DO-41 package | Higher power handling but larger footprint and looser tolerance (±5% vs. ±2.9% for HZS3A2TD-E) | Select when higher surge energy absorption is required and board space permits larger package. |
| BZX55-C3V6 | Zener voltage 3.6 V (±5%), 500 mW rating, DO-35 package, higher rd (10 Ω) | Similar voltage grade but higher dynamic resistance degrades regulation in fast-transient loads | Choose only for cost-sensitive consumer applications where ±5% tolerance and 10 Ω impedance are acceptable. |
Compared with 1N4728A and BZX55-C3V6, HZS3A2TD-E offers tighter voltage tolerance (±2.9%), lower dynamic resistance (5 Ω), and smaller MHD footprint-making it optimal for space-constrained industrial and automotive designs requiring high-precision, low-drift regulation.
Availability
HZS3A2TD-E is available at Aetrix Electronics and suitable for industrial power monitoring, IoT sensor reference, automotive body control, and medical diagnostic equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for HZS3A2TD-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.
HZS3A2TD-E belongs to the HZS Series silicon planar Zener diodes, engineered specifically for high-stability voltage regulation in low-power, high-reliability power supply and reference applications across harsh-environment systems.
FAQ
What is the exact zener voltage range for HZS3A2TD-E at 5 mA test current?
The HZS3A2TD-E has a guaranteed zener voltage range of 3.5 V minimum to 3.7 V maximum when tested at IZ = 5 mA and Ta = 25°C. This 3.5 V nominal rating with ±0.2 V tolerance provides precise alignment with 3.3 V system rails while accommodating manufacturing variance and thermal drift.
Does HZS3A2TD-E support automatic insertion in high-volume manufacturing?
Yes, HZS3A2TD-E uses the MHD package with standardized 5 mm lead pitch and axial configuration, explicitly designed for compatibility with high-speed automatic insertion equipment. Its 2.0 mm body diameter and 26.0 mm length meet JEITA GRZZ0002ZC-A mechanical specifications for reliable pick-and-place and wave soldering.
What is the maximum allowable junction temperature for continuous operation of HZS3A2TD-E?
The absolute maximum junction temperature for HZS3A2TD-E is 200°C, as specified in the Renesas datasheet. This enables sustained operation in thermally aggressive environments such as motor drive control units or enclosed industrial power supplies, provided power dissipation remains within the 400 mW limit and thermal design accounts for ambient and PCB heat spreading.
How does the dynamic resistance of HZS3A2TD-E affect voltage regulation performance?
HZS3A2TD-E exhibits 5 Ω dynamic resistance at 5 mA, meaning its output voltage varies by only 5 mV per 1 mA change in zener current. This low rd ensures minimal regulation error in feedback loops and reference circuits-critical for maintaining ADC accuracy and analog signal integrity in precision measurement systems using HZS3A2TD-E.
Is HZS3A2TD-E compliant with RoHS and lead-free assembly requirements?
Yes, HZS3A2TD-E complies with the EU RoHS Directive and supports lead-free reflow and wave soldering processes. Renesas confirms environmental compliance in accordance with applicable regulations, and the device is rated for storage from −55°C to +175°C-ensuring robustness across RoHS-compliant manufacturing and field deployment conditions.
HZS3A2TD-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:
- -
HZS3A2TD-E FAQ
1.How can I place an order for HZS3A2TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS3A2TD-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 HZS3A2TD-E reliable?
The price and inventory of HZS3A2TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS3A2TD-E is usually 5 days.
3.What payment methods are accepted for HZS3A2TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS3A2TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS3A2TD-E?
HZS3A2TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS3A2TD-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 HZS3A2TD-E?
For technical support, including HZS3A2TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS3A2TD-E requirements.
6.How does Aetrix verify that HZS3A2TD-E is sourced from the original manufacturer or authorized distributors?
All HZS3A2TD-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 HZS3A2TD-E meets industry standards.
7.What is the process for return or replacement of HZS3A2TD-E?
All HZS3A2TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS3A2TD-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 HZS3A2TD-E part is unused and in its original packaging.
Return procedure for HZS3A2TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS3A2TD-E Tags
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