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Renesas HZS2A2TD-E
- Part No.:
- HZS2A2TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS2A2TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
HZS2A2TD-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 1.7 V (min 1.7 V, max 1.9 V), 400 mW maximum power dissipation, and dynamic resistance of 100 Ω at 5 mA test current - used in voltage reference circuits for sensor biasing and microcontroller reset supervision.
For engineers reviewing the HZS2A2TD-E datasheet, HZS2A2TD-E pinout, HZS2A2TD-E application, or HZS2A2TD-E equivalent, this device serves as a low-leakage, low-impedance voltage reference in space-constrained industrial control modules, battery-powered instrumentation, and embedded analog front-ends requiring stable sub-2V regulation under varying load and temperature conditions.
Technical Context
The HZS2A2TD-E operates as a two-terminal shunt regulator with cathode-anode polarity, optimized for DC-stabilized operation at 5 mA zener test current. Its 1.7–1.9 V zener voltage range targets low-voltage logic interface referencing and brown-out detection thresholds.
It features low reverse leakage (≤25 µA at 0.5 V), 100 Ω dynamic impedance at IZ = 5 mA, and a junction temperature rating up to 200°C - enabling reliable operation in thermally demanding PCB environments without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 1.7 V min / 1.9 V max at IZ = 5 mA - defines tight tolerance window for accurate 1.8 V nominal reference generation. |
| Power Dissipation (Pd) | 400 mW maximum - supports continuous regulation in compact through-hole designs without heatsinking. |
| Dynamic Resistance (rd) | 100 Ω max at IZ = 5 mA - ensures minimal output voltage variation under small-signal load transients. |
| Reverse Leakage (IR) | 25 µA max at VR = 0.5 V - enables low-quiescent-current bias networks in battery-critical applications. |
| Junction Temperature (Tj) | 200°C maximum - allows operation in high-ambient industrial enclosures (e.g., motor drive control boards). |
| Package Type | MHD (Mini-High-Density) - 5 mm pitch, axial leaded, paper-phenol body compatible with high-speed automatic insertion. |
Pinout & Package
Package: MHD (axial-leaded, 2.0 mm diameter × 26.0 mm length, 0.4 mm lead diameter, 5 mm lead pitch), mass ≈ 0.084 g, JEITA code GRZZ0002ZC-A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated Output Terminal | Connected to positive rail; sinks current to maintain stable VZ across load - polarity must be observed to avoid forward conduction. |
| 2 (Anode) | Reference Ground Terminal | Connected to circuit common; completes shunt path - no internal grounding; external bias resistor required for operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low Zener Impedance | 100 Ω max at 5 mA - minimizes output voltage shift during 1–10 mA load variations in feedback networks. |
| Wide Zener Voltage Range Coverage | 1.6–38 V across HZS Series - enables single-family sourcing for multi-rail systems (e.g., 1.8 V, 3.3 V, 5 V, 12 V references). |
| High-Temperature Junction Rating | 200°C - permits use in proximity to power MOSFETs or transformers without derating in industrial SMPS auxiliary supplies. |
| Automated Insertion Compatibility | 5 mm pitch, MHD package - supports high-throughput assembly in legacy through-hole production lines. |
Applications
| Industrial Sensor Biasing | Microcontroller Reset Supervision |
|---|---|
|
Use Scenario: Providing stable 1.8 V reference for analog output stages of pressure/temperature transducers in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise excitation voltage for Wheatstone bridge sensors. Use Value: Tight 1.7–1.9 V tolerance and low 100 Ω dynamic resistance reduce measurement drift caused by supply ripple and load changes. |
Use Scenario: Generating a clean, temperature-stable threshold for brown-out detection circuits in ARM Cortex-M0+ based edge controllers. IC Role / Device Role / Timing Role: Zener-based comparator reference input ensuring deterministic reset assertion below 1.85 V. Use Value: Low 25 µA leakage preserves battery life in always-on monitoring nodes while maintaining fast response to undervoltage events. |
| Low-Power Analog Front-Ends | Legacy Equipment Voltage Calibration |
|
Use Scenario: Setting reference points for 12-bit ADC input scaling in portable medical diagnostic devices powered by coin cells. IC Role / Device Role / Timing Role: Precision DC voltage clamp defining full-scale input range for signal conditioning amplifiers. Use Value: 400 mW power rating allows safe operation at 5 mA bias current without thermal runaway in sealed enclosures. |
Use Scenario: Replacing obsolete zeners in field-service calibration of vintage test equipment requiring traceable 1.8 V reference standards. IC Role / Device Role / Timing Role: Drop-in replacement for discontinued 1N746A-grade devices in repair depots. Use Value: Identical MHD package and 5 mm pitch enable direct PCB reuse without rework or adapter boards. |
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 |
|---|---|---|---|
| BZX55C1V8 (ON Semiconductor) | 1.8 V nominal (1.7–1.9 V), 500 mW Pd, 100 Ω rd, DO-35 package (4.5 mm length, 2.0 mm diameter) | Higher power rating but larger DO-35 body - requires PCB pad revision if replacing HZS2A2TD-E in MHD footprints. | Select when higher surge tolerance is needed; verify mechanical fit before board-level substitution. |
| 1N4728A (Vishay) | 3.3 V nominal, 1 W Pd, 8 Ω rd, DO-41 package - not voltage-compatible with HZS2A2TD-E's 1.7–1.9 V range | Designed for 3.3 V systems; unsuitable as direct substitute due to 1.5 V higher VZ and incompatible regulation point. | Use only in new designs targeting 3.3 V reference; not a functional alternative for HZS2A2TD-E's sub-2V role. |
Compared with BZX55C1V8 and 1N4728A, the HZS2A2TD-E offers optimal fit for space-limited 1.8 V reference needs via its MHD package and matched 1.7–1.9 V range - whereas BZX55C1V8 trades footprint compatibility for marginally higher power, and 1N4728A serves entirely different voltage rails.
Availability
HZS2A2TD-E is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller reset supervision, and low-power analog front-ends requiring stable component supply with consistent parametric performance across production batches.
Supply support for HZS2A2TD-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.
The HZS Series belongs to Renesas' discrete voltage reference product line, engineered specifically for high-precision, low-drift DC stabilization in cost-sensitive, high-volume power management circuits.
FAQ
What is the exact zener voltage range specified for HZS2A2TD-E?
The HZS2A2TD-E has a guaranteed zener voltage range of 1.7 V minimum to 1.9 V maximum when tested at 5 mA zener current and 25°C ambient temperature. This 200 mV tolerance band enables precise 1.8 V nominal reference generation for low-voltage logic and analog circuits, and is confirmed in the Renesas REJ03G0184-0500 datasheet, page 2.
Is HZS2A2TD-E compatible with automated through-hole assembly equipment?
Yes, the HZS2A2TD-E uses the MHD package with 5 mm lead pitch and axial lead configuration, explicitly designed for high-speed automatic insertion per the datasheet ordering information. Its 2.0 mm body diameter and standardized lead spacing ensure reliable feeding and placement on legacy and modern through-hole production lines without modification.
What is the maximum allowable junction temperature for HZS2A2TD-E?
The absolute maximum junction temperature for HZS2A2TD-E is 200°C, as stated in the Absolute Maximum Ratings table (page 2 of REJ03G0184-0500). This rating allows operation in thermally aggressive environments such as near power inductors or heat sinks in industrial power supplies, provided the power dissipation remains within the 400 mW limit and PCB thermal relief is adequate.
Does HZS2A2TD-E have a specified temperature coefficient?
No, the Renesas datasheet does not list a numeric temperature coefficient (γZ) value specific to HZS2A2TD-E. Figure 2 shows γZ trends across the full HZS Series, indicating negative coefficients below 5 V - but no discrete value is assigned to the HZS2A2TD-E grade. Designers should characterize drift empirically or select higher-VZ variants if tempco is critical.
Can HZS2A2TD-E replace older NEC-brand zener diodes in legacy designs?
Yes - HZS2A2TD-E is a direct continuation of the original NEC HZS series, maintained under Renesas Electronics after the 2010 merger. The electrical specifications, package dimensions (MHD), and marking (lake blue cathode band) match prior NEC releases, making it a fully compatible drop-in replacement for NEC-branded HZS2A2 parts in service and production.
HZS2A2TD-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:
- -
HZS2A2TD-E FAQ
1.How can I place an order for HZS2A2TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS2A2TD-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 HZS2A2TD-E reliable?
The price and inventory of HZS2A2TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS2A2TD-E is usually 5 days.
3.What payment methods are accepted for HZS2A2TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS2A2TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS2A2TD-E?
HZS2A2TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS2A2TD-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 HZS2A2TD-E?
For technical support, including HZS2A2TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS2A2TD-E requirements.
6.How does Aetrix verify that HZS2A2TD-E is sourced from the original manufacturer or authorized distributors?
All HZS2A2TD-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 HZS2A2TD-E meets industry standards.
7.What is the process for return or replacement of HZS2A2TD-E?
All HZS2A2TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS2A2TD-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 HZS2A2TD-E part is unused and in its original packaging.
Return procedure for HZS2A2TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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