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Renesas HZS7A1TA-E
- Part No.:
- HZS7A1TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS7A1TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZS7A1TA-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, featuring a nominal zener voltage of 7.5 V (min 7.5 V, max 7.9 V), 400 mW maximum power dissipation, and dynamic resistance of 15 Ω at 5 mA test current - deployed in industrial control power rails and sensor biasing circuits.
For engineers reviewing the HZS7A1TA-E datasheet, HZS7A1TA-E pinout, HZS7A1TA-E application, or HZS7A1TA-E equivalent, this page delivers verified electrical specifications, package geometry, thermal derating behavior, cathode/anode terminal roles, and direct alternative options for voltage reference design and overvoltage protection circuits.
Technical Context
The HZS7A1TA-E operates as a two-terminal voltage reference device with sharp reverse breakdown characteristics, optimized for DC stabilization under low-current conditions (IZ = 5 mA). Its zener voltage exhibits a temperature coefficient of −0.04 %/°C (−4 mV/°C) near 7.5 V, minimizing drift across ambient temperatures from −55°C to +175°C.
Constructed using silicon planar process technology, it achieves low leakage (<1 µA at VR = 5 V), low dynamic impedance (15 Ω), and stable junction temperature up to 200°C - enabling reliable operation in compact PCB layouts with minimal thermal margin requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V min to 7.9 V max at IZ = 5 mA - defines tight regulation window for 7.5 V reference designs. |
| Power Dissipation (Pd) | 400 mW maximum at Ta = 25°C - sets upper limit for continuous DC power handling without heatsinking. |
| Dynamic Resistance (rd) | 15 Ω at IZ = 5 mA - ensures minimal output voltage variation under load current changes. |
| Reverse Leakage Current (IR) | ≤1 µA at VR = 5 V - guarantees low standby power loss in always-on bias networks. |
| Junction Temperature (Tj) | 200°C maximum - supports high-temperature environments such as motor drive control boards. |
| Storage Temperature | −55°C to +175°C - enables use in extended industrial and automotive under-hood applications. |
Pinout & Package
Package: MHD (Mini-High-Density) plastic molded case, 2-pin axial leaded, 5 mm pitch, 2.0 mm diameter body, 26 mm lead length - compatible with high-speed automatic insertion equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference node | Connected to regulated positive rail; polarity mark (lake blue band) identifies this terminal. |
| 2 (Anode) | Ground/reference return | Tied to circuit common; reverse-biased operation requires anode at lower potential than cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 15 Ω at 5 mA - maintains stable reference voltage despite small load transients. |
| Wide zener voltage range coverage | Part of HZS Series spanning 1.6 V–38 V - allows single-source selection across diverse supply rails. |
| High-temperature junction rating | 200°C max Tj - eliminates need for external thermal derating in enclosed enclosures. |
| Automated assembly compatibility | 5 mm pitch, standardized MHD package - supports pick-and-place and wave soldering without rework. |
| Low leakage performance | <1 µA at 5 V reverse bias - critical for battery-powered sensor nodes requiring ultra-low quiescent current. |
Applications
| Industrial Power Monitoring | Automotive Sensor Biasing |
|---|---|
|
Use Scenario: Voltage reference for analog-to-digital converters monitoring 12 V battery rail in engine control units. IC Role / Device Role / Timing Role: Provides stable 7.5 V reference to ADC input scaling network. Use Value: Enables ±1% measurement accuracy over −40°C to +125°C ambient due to low tempco and tight VZ tolerance. |
Use Scenario: Biasing voltage source for Hall-effect position sensors in throttle actuators. IC Role / Device Role / Timing Role: Supplies regulated excitation voltage to sensor bridge circuitry. Use Value: Ensures consistent sensor output amplitude across temperature swings, reducing calibration drift. |
| Programmable Logic Controller I/O Modules | Medical Diagnostic Equipment Power Rails |
|
Use Scenario: Overvoltage clamp on 5 V logic supply lines feeding FPGA configuration interfaces. IC Role / Device Role / Timing Role: Acts as shunt protector during transient surges on backplane power buses. Use Value: Clamps spikes above 7.9 V within nanoseconds while dissipating ≤400 mW peak energy. |
Use Scenario: Precision reference for isolated DC-DC converter feedback loops in portable ultrasound units. IC Role / Device Role / Timing Role: Sets output voltage setpoint via optocoupler-coupled error amplifier. Use Value: Delivers <±2% initial accuracy and <50 ppm/°C drift, meeting Class II medical power compliance. |
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) | Zener voltage 5.1 V ±5%, Pd = 1 W, DO-41 package - higher power but different VZ and form factor. | Not suitable for 7.5 V reference; requires redesign of resistor divider and layout. | Select only if 5.1 V reference and higher power margin are required; not a drop-in replacement. |
| BZX55C7V5 (Vishay) | Zener voltage 7.5 V ±5%, Pd = 500 mW, DO-35 package - same VZ grade but larger footprint and higher power rating. | Compatible in function but requires pad revision due to DO-35 vs. MHD lead spacing and body size. | Preferred where higher surge tolerance is needed; verify thermal relief and board space constraints. |
Compared with HZS7A1TA-E, the 1N4733A offers higher power but mismatched voltage, while BZX55C7V5 matches VZ and improves surge capability at the cost of larger PCB area and non-automated-insertion packaging.
Availability
HZS7A1TA-E is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HZS7A1TA-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 and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.
HZS7A1TA-E belongs to the HZS Series of silicon planar Zener diodes engineered for high-stability DC voltage regulation in space-constrained, thermally demanding power supply applications.
FAQ
What is the exact zener voltage range for HZS7A1TA-E?
The HZS7A1TA-E has a guaranteed zener voltage range of 7.5 V minimum to 7.9 V maximum when tested at IZ = 5 mA and Ta = 25°C. This 0.4 V tolerance reflects Grade C3 specification within the HZS7 family and ensures predictable regulation in precision reference circuits where ±2.7% initial accuracy is required.
Does HZS7A1TA-E support automated PCB assembly?
Yes, HZS7A1TA-E uses the MHD package with 5 mm lead pitch and standardized axial geometry, explicitly qualified for high-speed automatic insertion per the datasheet. Its 2.0 mm body diameter and 26 mm lead length comply with GRZZ0002ZC-A mechanical standards, enabling compatibility with standard pick-and-place feeders and wave soldering profiles.
What is the maximum junction temperature rating for HZS7A1TA-E?
The HZS7A1TA-E is rated for a maximum junction temperature (Tj) of 200°C, significantly exceeding typical commercial-grade diodes. This allows uninterrupted operation in high-ambient environments such as motor drive inverters or enclosed industrial controllers without forced cooling, provided power dissipation remains within derated limits per Figure 3 in REJ03G0184-0500.
How does the temperature coefficient affect HZS7A1TA-E performance?
HZS7A1TA-E exhibits a zener voltage temperature coefficient (γZ) of −0.04 %/°C (≈ −4 mV/°C) near its 7.5 V operating point. This negative drift counterbalances positive thermal effects in associated circuitry, making it especially valuable in mixed-signal systems where reference stability over −40°C to +125°C must stay within ±0.5% total error budget.
Can HZS7A1TA-E be used as a transient voltage suppressor?
No - HZS7A1TA-E is optimized for steady-state DC voltage regulation, not transient suppression. With only 400 mW power dissipation and no specified peak pulse rating, it lacks the energy-handling capability of dedicated TVS diodes. For surge protection, pair HZS7A1TA-E with a series current-limiting resistor and use a separate TVS like P6KE7.5CA for clamping fast transients.
HZS7A1TA-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:
- -
HZS7A1TA-E FAQ
1.How can I place an order for HZS7A1TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS7A1TA-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 HZS7A1TA-E reliable?
The price and inventory of HZS7A1TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS7A1TA-E is usually 5 days.
3.What payment methods are accepted for HZS7A1TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS7A1TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS7A1TA-E?
HZS7A1TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS7A1TA-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 HZS7A1TA-E?
For technical support, including HZS7A1TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS7A1TA-E requirements.
6.How does Aetrix verify that HZS7A1TA-E is sourced from the original manufacturer or authorized distributors?
All HZS7A1TA-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 HZS7A1TA-E meets industry standards.
7.What is the process for return or replacement of HZS7A1TA-E?
All HZS7A1TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS7A1TA-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 HZS7A1TA-E part is unused and in its original packaging.
Return procedure for HZS7A1TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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