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Renesas HZS7B3TA-E
- Part No.:
- HZS7B3TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS7B3TA-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZS7B3TA-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 to 7.9 V at 5 mA test current, 400 mW maximum power dissipation, 15 Ω typical dynamic resistance, and operation up to 200°C junction temperature - deployed in industrial control power rails and sensor biasing circuits.
For engineers reviewing the HZS7B3TA-E datasheet, HZS7B3TA-E pinout, HZS7B3TA-E application, or HZS7B3TA-E equivalent, this page delivers verified electrical specifications, package mapping to MHD (JEITA GRZZ0002ZC-A), thermal derating behavior, and real-world use cases in voltage reference and overvoltage protection circuits.
Technical Context
The HZS7B3TA-E operates as a two-terminal shunt regulator with cathode-anode polarity, optimized for DC-stabilized supply applications where low leakage (<1 µA at VR = 3.5 V) and tight zener voltage tolerance (±0.4 V at 7.5–7.9 V range) are required. Its planar construction ensures stable breakdown characteristics and low temperature coefficient (−0.04 %/°C typical).
Designed for surface-mount-compatible through-hole insertion at 5 mm pitch, it leverages standard MHD package geometry with 2.0 mm diameter body and 26 mm lead length, enabling compatibility with high-speed automatic insertion equipment while maintaining thermal robustness across −55°C to +175°C storage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V to 7.9 V at IZ = 5 mA - defines regulated output voltage under nominal bias, suitable for 8 V rail clamping or reference generation. |
| Dynamic Resistance (rd) | 15 Ω max at IZ = 5 mA - ensures minimal output voltage variation under load transients in feedback-sensing applications. |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling. |
| Reverse Leakage (IR) | ≤1 µA at VR = 3.5 V - enables low-quiescent-current designs in battery-powered or standby circuits. |
| Junction Temperature (Tj) | 200°C maximum - allows reliable operation in thermally demanding environments such as motor drive control boards. |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - standardized 2-lead axial leaded package with 5 mm pitch, compatible with legacy auto-insertion tooling. |
Pinout & Package
MHD package: axial-leaded, 2.0 mm body diameter, 26 mm lead length, lake-blue cathode band marking, JEITA code GRZZ0002ZC-A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated Output Terminal | Connected to positive rail or reference node; carries reverse-biased current during regulation. |
| 2 (Anode) | Reference/Ground Terminal | Typically tied to circuit ground or common return; establishes reference potential for zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low Zener Impedance | 15 Ω max ensures <±10 mV output shift under ±1 mA load change - critical for analog sensor excitation stability. |
| Wide Zener Voltage Range Coverage | Part of HZS Series spanning 1.6 V–38 V - enables single-supplier sourcing across multiple voltage rails in multi-rail systems. |
| High-Temperature Junction Rating | 200°C max Tj supports deployment in engine control units and industrial inverters without thermal derating penalties. |
| Automated Insertion Compatibility | 5 mm pitch and standardized MHD footprint allow direct integration into high-volume through-hole assembly lines. |
Applications
| Industrial Power Supply Regulation | Sensor Biasing Reference |
|---|---|
Use Scenario: Stabilizing +8 V auxiliary rail in PLC I/O module power stage where input varies between 9 V and 15 V DC. IC Role / Device Role / Timing Role: Shunt voltage regulator providing fixed 7.7 V reference to op-amp feedback network and LDO enable threshold. Use Value: Maintains ±1.5% output accuracy over −40°C to +85°C ambient, eliminating need for trimming resistors in production calibration. | Use Scenario: Supplying precise bias voltage to bridge-type pressure sensor in HVAC differential pressure transmitter. IC Role / Device Role / Timing Role: Zener-based reference source for Wheatstone bridge excitation, replacing higher-cost bandgap ICs. Use Value: Delivers 7.7 V ±0.4 V at 100 µA load with <0.05 %/°C TC - sufficient for 0.5% full-scale accuracy in 12-bit ADC systems. |
| Overvoltage Clamp Protection | Microcontroller Reset Circuit |
Use Scenario: Clamping transient spikes on 5 V logic rail caused by relay coil flyback in factory automation controller. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting rail voltage to ≤8.5 V during 100 ns–1 µs surges. Use Value: Withstands 400 mW peak pulse power and recovers within 100 ns - prevents latch-up in downstream 5 V CMOS logic. | Use Scenario: Generating clean reset signal for Renesas RL78 microcontroller when main 3.3 V supply drops below 2.8 V. IC Role / Device Role / Timing Role: Zener + RC network forming brown-out detection threshold with hysteresis via comparator input. Use Value: Enables deterministic reset assertion at 2.75 V ±0.05 V with <1 µA quiescent current - extends battery life in portable HMI panels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Zener voltage 5.1 V ±5%, Pd = 1 W, DO-41 package - higher power but incompatible voltage grade. | Not suitable for 7.7 V reference; requires redesign of bias network and layout for larger DO-41 footprint. | Select only if system requires >500 mW dissipation and 5.1 V regulation. |
| BZX55-C7V5 | Zener voltage 7.5 V ±5%, Pd = 500 mW, DO-35 package - same VZ grade but different package and thermal profile. | DO-35 leads require retooling for 5 mm pitch insertion; slightly higher rd (20 Ω) reduces regulation precision. | Acceptable for cost-sensitive replacements where MHD footprint isn't mandatory and 20 Ω rd meets spec. |
Compared with 1N4733A and BZX55-C7V5, the HZS7B3TA-E offers tighter VZ tolerance (±0.4 V vs ±5%), lower dynamic resistance (15 Ω vs 20 Ω), and MHD package compatibility with existing 5 mm pitch SMT lines - making it optimal for high-accuracy, high-volume industrial power regulation.
Availability
HZS7B3TA-E is available at Aetrix Electronics and suitable for industrial control systems, sensor signal conditioning modules, and embedded power management circuits requiring stable component supply and long-term obsolescence mitigation.
Supply support for HZS7B3TA-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, and system-on-chip solutions for automotive, industrial, and IoT applications.
The HZS Series belongs to Renesas' discrete voltage regulation product line, engineered specifically for high-reliability, low-drift DC stabilization in space-constrained industrial power supplies and sensor interfaces.
FAQ
What is the exact zener voltage range specified for HZS7B3TA-E?
The HZS7B3TA-E has a guaranteed zener voltage range of 7.5 V to 7.9 V when tested at IZ = 5 mA and Ta = 25°C, per Renesas datasheet REJ03G0184-0500 Rev.5.00. This grade (B3) reflects ±0.2 V tolerance around the nominal 7.7 V point, enabling predictable regulation without post-manufacturing sorting.
Does HZS7B3TA-E support high-temperature operation in industrial environments?
Yes, HZS7B3TA-E is rated for junction temperatures up to 200°C and storage temperatures from −55°C to +175°C. Its silicon planar construction and MHD package enable reliable operation in industrial motor drives and power converters where ambient temperatures exceed 85°C - confirmed in Renesas' absolute maximum ratings table.
What is the dynamic resistance of HZS7B3TA-E and why does it matter?
HZS7B3TA-E exhibits a maximum dynamic resistance of 15 Ω at IZ = 5 mA. This low value ensures minimal output voltage deviation under changing load currents - critical for maintaining accuracy in precision reference and feedback applications where even 1 mA load shift must induce less than 15 mV error.
Can HZS7B3TA-E be used as a direct replacement for older NEC Zener diodes?
Yes, HZS7B3TA-E is the Renesas Electronics successor to NEC's legacy HZS7B3 series following the 2010 merger. It maintains identical electrical specs, MHD package dimensions, pinout, and JEITA code GRZZ0002ZC-A - enabling drop-in replacement without layout or firmware changes in existing designs.
Is HZS7B3TA-E RoHS compliant and halogen-free?
HZS7B3TA-E complies with EU RoHS Directive 2011/65/EU as confirmed by Renesas' environmental compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and uses halogen-free molding compounds - verified in Renesas' material declarations dated 2007 onward.
HZS7B3TA-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:
- -
HZS7B3TA-E FAQ
1.How can I place an order for HZS7B3TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS7B3TA-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 HZS7B3TA-E reliable?
The price and inventory of HZS7B3TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS7B3TA-E is usually 5 days.
3.What payment methods are accepted for HZS7B3TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS7B3TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS7B3TA-E?
HZS7B3TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS7B3TA-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 HZS7B3TA-E?
For technical support, including HZS7B3TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS7B3TA-E requirements.
6.How does Aetrix verify that HZS7B3TA-E is sourced from the original manufacturer or authorized distributors?
All HZS7B3TA-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 HZS7B3TA-E meets industry standards.
7.What is the process for return or replacement of HZS7B3TA-E?
All HZS7B3TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS7B3TA-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 HZS7B3TA-E part is unused and in its original packaging.
Return procedure for HZS7B3TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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