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Renesas HZS12B2TA-E
- Part No.:
- HZS12B2TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS12B2TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
HZS12B2TA-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 12.0 V (min 11.6 V, max 12.4 V), dynamic resistance of 9.5 Ω at 1 mA, and maximum power dissipation of 400 mW in the MHD package.
For engineers reviewing the HZS12B2TA-E datasheet, HZS12B2TA-E pinout, HZS12B2TA-E application, or HZS12B2TA-E equivalent, this device serves as a compact, low-leakage, low-impedance voltage reference for industrial control logic rails, sensor biasing circuits, and overvoltage protection clamping in embedded systems operating up to 200°C junction temperature.
Technical Context
The HZS12B2TA-E employs a silicon planar junction structure optimized for stable DC zener operation with low temperature coefficient (±0.05 %/°C typical near 12 V) and minimal reverse leakage current (≤1 µA at VR = 10.2 V). Its design targets fixed-voltage reference applications where tight tolerance and predictable impedance are required under constant-current bias.
It operates within a defined test condition of IZ = 1 mA for zener voltage specification, with dynamic resistance measured at the same current level. The device exhibits no switching or transient response specifications - it is strictly a passive, two-terminal, DC-stabilized voltage source component.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.6 V min / 12.4 V max at IZ = 1 mA - defines usable regulation band for 12 V rail stabilization |
| Dynamic Resistance (rd) | 9.5 Ω max at IZ = 1 mA - determines output voltage variation under load current changes |
| Reverse Leakage Current (IR) | ≤1 µA max at VR = 10.2 V - ensures minimal quiescent power loss in high-impedance bias networks |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets absolute thermal limit before derating begins |
| Junction Temperature (Tj) | −55°C to +200°C - enables use in high-temperature industrial environments without external heatsinking |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - 5 mm pitch, axial-lead, phenolic board-mount package for automated insertion |
Pinout & Package
The HZS12B2TA-E is housed in the MHD package: a miniature axial-leaded, silicon-planar diode package with phenolic board material, 5 mm lead pitch, and lake-blue cathode band marking. Total mass is 0.084 g (typ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener reference output terminal | Connected to regulated voltage node; polarity must be observed to maintain reverse-bias operation |
| 2 (Anode) | Reference ground/reference return | Common return path for bias current; establishes reference potential for VZ measurement |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 9.5 Ω max enables <12 mV output shift per 1.26 mA load change - critical for stable analog reference nodes |
| Wide zener voltage range coverage | Part of HZS Series spanning 1.6–38 V - allows standardized procurement across multiple voltage rails |
| High-temperature junction rating | 200°C max Tj supports operation in sealed enclosures or near heat-generating components without derating |
| Automated insertion compatibility | 5 mm pitch and MHD mechanical dimensions enable direct use in high-speed axial component placement equipment |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Providing stable 12 V reference for op-amp-based bridge sensor amplifiers in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Passive voltage reference element establishing precise gain-setting and offset nulling points. Use Value: Low dynamic resistance minimizes signal drift under varying amplifier supply current, improving long-term measurement repeatability. |
Use Scenario: Generating reliable reset threshold for 3.3 V microcontrollers powered from a 12 V input via LDO. IC Role / Device Role / Timing Role: Zener-clamped voltage divider supplying accurate reset comparator input. Use Value: Tight VZ tolerance (±0.4 V) ensures deterministic reset assertion across temperature and unit-to-unit variation. |
| Overvoltage Clamp in RS-485 Transceivers | EEPROM Memory Bias Supply |
|
Use Scenario: Protecting RS-485 receiver inputs against transients exceeding ±15 V common-mode range. IC Role / Device Role / Timing Role: Bidirectional clamping diode (with series resistor) limiting voltage excursion on data lines. Use Value: Low leakage (<1 µA) prevents signal attenuation during normal operation while enabling fast clamping response. |
Use Scenario: Supplying clean 5 V bias to serial EEPROM write-enable circuitry in programmable logic controllers. IC Role / Device Role / Timing Role: Low-noise, low-drift DC voltage source for memory cell programming voltage generation. Use Value: Stable 12 V reference improves accuracy of charge-pump-derived 5 V, reducing write-failure rate in extended-temperature operation. |
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 |
|---|---|---|---|
| 1N4742A (ON Semiconductor) | 12 V nominal, 1 W power rating, DO-41 package, rd = 9 Ω - higher power but larger footprint and lower temp rating (175°C) | Preferred where higher surge energy handling is needed; unsuitable for space-constrained MHD-compatible layouts | Select only if board layout allows DO-41 and thermal margin exceeds 400 mW requirement |
| BZX55C12 (Vishay) | 12 V nominal, 500 mW rating, DO-35 package, rd = 15 Ω - higher impedance and wider VZ tolerance (±5%) | Acceptable for non-critical biasing; not recommended for precision reference or low-drift analog circuits | Use only when cost sensitivity outweighs regulation stability and temperature coefficient requirements |
Compared with 1N4742A and BZX55C12, the HZS12B2TA-E offers superior thermal robustness (200°C vs. 175°C/150°C), tighter VZ tolerance (±0.4 V vs. ±5%), and MHD package compatibility for high-density automated assembly - making it optimal for industrial-grade embedded power management.
Availability
HZS12B2TA-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, microcontroller reset circuits, RS-485 overvoltage protection, and EEPROM bias supply applications requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for HZS12B2TA-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 was developed by Renesas as a family of precision silicon planar Zener diodes targeting stable, low-leakage voltage references for industrial power supply stabilization and signal conditioning - emphasizing reliability, temperature resilience, and automated manufacturing compatibility.
FAQ
What is the exact zener voltage range specified for HZS12B2TA-E?
The HZS12B2TA-E has a guaranteed zener voltage range of 11.6 V minimum to 12.4 V maximum when tested at IZ = 1 mA and Ta = 25°C. This 0.8 V total spread reflects Grade B2 tolerance within the HZS12 family and is confirmed in the official Renesas REJ03G0184-0500 datasheet, page 3.
Does HZS12B2TA-E support surface-mount assembly?
No, the HZS12B2TA-E uses the axial-leaded MHD package (JEITA GRZZ0002ZC-A) with 5 mm lead pitch and is designed exclusively for through-hole or high-speed automatic insertion - not reflow or wave soldering. It lacks SMD pad geometry, thermal mass, or moisture sensitivity rating required for surface-mount processes.
What is the maximum allowable reverse current before breakdown for HZS12B2TA-E?
The HZS12B2TA-E specifies a maximum reverse leakage current (IR) of 1 µA at VR = 10.2 V, well below its nominal zener voltage. This value is measured under DC conditions and defines the upper bound of off-state conduction prior to entering the regulated breakdown region.
Can HZS12B2TA-E be used in automotive applications?
The HZS12B2TA-E is rated as "Standard" quality grade per Renesas documentation and is intended for industrial, office, and communications equipment - not automotive. It lacks AEC-Q200 qualification, extended temperature validation beyond −55°C to +175°C storage, or automotive-specific reliability testing required for vehicle ECUs or body control modules.
How does the dynamic resistance of HZS12B2TA-E affect its performance in a voltage reference circuit?
The HZS12B2TA-E's dynamic resistance of 9.5 Ω max directly determines how much its output voltage shifts under changing load current - for example, a 1 mA change in bias current causes ≤9.5 mV variation in VZ. This low rd makes HZS12B2TA-E suitable for precision analog references where minimal regulation error is critical.
HZS12B2TA-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:
- -
HZS12B2TA-E FAQ
1.How can I place an order for HZS12B2TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS12B2TA-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 HZS12B2TA-E reliable?
The price and inventory of HZS12B2TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS12B2TA-E is usually 5 days.
3.What payment methods are accepted for HZS12B2TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS12B2TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS12B2TA-E?
HZS12B2TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS12B2TA-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 HZS12B2TA-E?
For technical support, including HZS12B2TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS12B2TA-E requirements.
6.How does Aetrix verify that HZS12B2TA-E is sourced from the original manufacturer or authorized distributors?
All HZS12B2TA-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 HZS12B2TA-E meets industry standards.
7.What is the process for return or replacement of HZS12B2TA-E?
All HZS12B2TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS12B2TA-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 HZS12B2TA-E part is unused and in its original packaging.
Return procedure for HZS12B2TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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