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Renesas HZS12B2LTD-E
- Part No.:
- HZS12B2LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS12B2LTD-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:24,075
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Product details
Overview
HZS12B2LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog and stabilized power supply circuits, with a nominal zener voltage of 12.6 V to 13.1 V, dynamic resistance of 80 Ω at 0.5 mA test current, and maximum power dissipation of 400 mW in the MHD package.
For engineers reviewing the HZS12B2LTD-E datasheet, HZS12B2LTD-E pinout, HZS12B2LTD-E application, or HZS12B2LTD-E equivalent, this device is selected for noise-sensitive reference designs requiring stable zener impedance, low leakage (<1 μA), and tight voltage tolerance across temperature - especially where legacy HZ-series noise performance was insufficient.
Technical Context
The HZS12B2LTD-E employs a silicon planar junction structure with controlled doping and geometry to achieve reduced flicker (1/f) noise - approximately 1/3–1/10 that of the older HZ series - while maintaining low zener impedance (80 Ω) and low reverse leakage (≤1 μA at VR = 10.5 V). Its thermal coefficient is −0.04 mV/°C near 12.8 V, supporting stable reference behavior over −55°C to +175°C storage range.
Designed for DC-biased operation (per note on page 2), it delivers consistent zener voltage under fixed-current biasing and is rated for junction temperatures up to 200°C. The MHD package supports 5 mm-pitch high-speed automatic insertion and provides mechanical robustness for industrial PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.6 V to 13.1 V at IZ = 0.5 mA - defines precise DC reference point for feedback loops or analog sensing. |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under small-signal load transients. |
| Reverse Leakage (IR) | ≤1 μA at VR = 10.5 V - preserves accuracy in high-impedance bias networks and low-power references. |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - enables use in compact, non-heatsinked regulator stages without derating. |
| Junction Temperature (Tj) | 200°C max - supports operation in thermally demanding environments such as industrial control enclosures. |
| Storage Temperature | −55°C to +175°C - compatible with reflow soldering and extended-life deployments in harsh ambient conditions. |
Pinout & Package
The HZS12B2LTD-E is housed in the MHD package (JEITA code GRZZ0002ZC-A), a radial leaded, epoxy-molded case with 2.0 mm diameter leads and 26.0 mm body length, designed for through-hole mounting and 5 mm pitch automated insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener reference terminal | Connected to regulated output node; polarity must be observed to maintain reverse-bias operation. |
| 2 (Anode) | Reference ground return | Serves as current sink path; ties to system ground or bias resistor network common point. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | 1/f noise reduced to ~1/3–1/10 of HZ-series diodes - critical for audio references and precision ADC/DAC voltage references. |
| Tight zener voltage tolerance | ±0.25 V window (12.6–13.1 V) at 0.5 mA - enables accurate trimming without external compensation. |
| Stable low-impedance regulation | 80 Ω dynamic resistance maintained across operating current range - minimizes line/load regulation error. |
| High-reliability planar construction | Controlled diffusion process yields repeatable breakdown characteristics and long-term parameter stability. |
| Automated assembly compatibility | MHD package meets 5 mm pitch insertion standards - supports high-volume manufacturing without manual handling. |
Applications
| Industrial Power Monitoring | Audio Equipment Reference |
|---|---|
Use Scenario: Real-time monitoring of 12 V rail integrity in PLC backplanes and motor drive controllers. IC Role / Device Role / Timing Role: Provides stable 12.8 V reference for comparator thresholds and ADC input scaling. Use Value: Low dynamic resistance (80 Ω) and low noise ensure clean threshold detection even during switching transients. |
Use Scenario: Biasing and reference generation in high-fidelity preamplifier and DAC output stages. IC Role / Device Role / Timing Role: Supplies ultra-low-noise DC reference for op-amp offset nulling and gain-setting networks. Use Value: 1/f noise reduction enables >110 dB SNR in analog signal paths without additional filtering. |
| Test & Measurement Instrumentation | Medical Diagnostic Signal Conditioning |
Use Scenario: Calibration reference in portable multimeters and benchtop DMMs requiring traceable voltage standards. IC Role / Device Role / Timing Role: Serves as primary zener reference in auto-ranging voltage measurement front-ends. Use Value: Tight VZ tolerance (±0.25 V) and low tempco (−0.04 mV/°C) support ±0.1% full-scale accuracy. |
Use Scenario: Isolated sensor signal conditioning in non-life-support diagnostic devices (e.g., ECG front-end biasing). IC Role / Device Role / Timing Role: Establishes stable reference for instrumentation amplifiers and anti-alias filters. Use Value: Low leakage (<1 μA) prevents input bias current errors in high-Z biopotential circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | Zener voltage 12 V ±5%, rd = 9 Ω (at 21 mA), higher noise, 1 W rating | Higher power handling but significantly higher 1/f noise - unsuitable for low-level analog references | Select only when higher current (>10 mA) and lower impedance are prioritized over noise performance. |
| BZX84-C12LT1G | SOT-23 surface-mount, VZ = 12 V ±5%, rd = 25 Ω (at 5 mA), moderate noise | Compact footprint but lacks the ultra-low-noise optimization and wide temp range of HZS-L series | Prefer for space-constrained digital systems; avoid in precision analog where HZS12B2LTD-E's noise advantage matters. |
Compared with 1N4742A and BZX84-C12LT1G, the HZS12B2LTD-E delivers superior noise performance and tighter voltage tolerance at lower test current, making it uniquely suited for low-power, high-accuracy reference designs - though its through-hole MHD package requires different layout and assembly planning.
Availability
HZS12B2LTD-E is available at Aetrix Electronics and suitable for industrial power monitoring, audio equipment reference, test & measurement instrumentation, and medical diagnostic signal conditioning requiring stable component supply and long-lifecycle support.
Supply support for HZS12B2LTD-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, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZS-L series was developed by Renesas specifically for low-noise, high-stability voltage reference applications in precision analog systems - extending the legacy of NEC/Renesas Zener technology with improved noise and impedance characteristics.
FAQ
What is the exact zener voltage range for HZS12B2LTD-E?
The HZS12B2LTD-E has a guaranteed zener voltage range of 12.6 V to 13.1 V when tested at IZ = 0.5 mA and Ta = 25°C. This 0.5 V window reflects tight process control for precision reference use, and the value is confirmed in the official Renesas Electrical Characteristics table on page 3 of REJ03G0166-0300 Rev.3.00.
Does HZS12B2LTD-E support surface-mount assembly?
No, the HZS12B2LTD-E uses the radial-leaded MHD package (JEITA GRZZ0002ZC-A) designed for through-hole mounting and 5 mm pitch automated insertion. It is not compatible with SMT reflow or pick-and-place processes. For surface-mount alternatives, consider BZX84-C12LT1G - but note its higher noise and different regulation profile compared to HZS12B2LTD-E.
What is the maximum reverse leakage current for HZS12B2LTD-E?
The maximum reverse leakage current for HZS12B2LTD-E is 1 μA, measured at VR = 10.5 V and Ta = 25°C. This low leakage supports high-impedance bias networks and minimizes error in precision reference applications - a key differentiator from standard Zener diodes like the 1N4742A, which specifies 5 μA at 9.6 V.
Is HZS12B2LTD-E suitable for automotive applications?
The HZS12B2LTD-E is classified as a "Standard" quality grade device per Renesas documentation and is intended for applications including industrial robots, test equipment, and office electronics - not automotive-grade systems. It lacks AEC-Q200 qualification and is not recommended for under-hood or safety-critical vehicle subsystems. For automotive use, consult Renesas' dedicated automotive Zener portfolio.
How does the noise performance of HZS12B2LTD-E compare to the older HZ series?
The HZS12B2LTD-E achieves approximately 1/3 to 1/10 the 1/f noise level of the legacy HZ series, as explicitly stated in the Renesas HZS-L Series features. This improvement stems from refined planar junction processing and is validated in low-frequency analog applications such as audio reference stages and precision ADC references where HZS12B2LTD-E outperforms HZ-series equivalents.
HZS12B2LTD-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:
- -
HZS12B2LTD-E FAQ
1.How can I place an order for HZS12B2LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS12B2LTD-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 HZS12B2LTD-E reliable?
The price and inventory of HZS12B2LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS12B2LTD-E is usually 5 days.
3.What payment methods are accepted for HZS12B2LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS12B2LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS12B2LTD-E?
HZS12B2LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS12B2LTD-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 HZS12B2LTD-E?
For technical support, including HZS12B2LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS12B2LTD-E requirements.
6.How does Aetrix verify that HZS12B2LTD-E is sourced from the original manufacturer or authorized distributors?
All HZS12B2LTD-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 HZS12B2LTD-E meets industry standards.
7.What is the process for return or replacement of HZS12B2LTD-E?
All HZS12B2LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS12B2LTD-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 HZS12B2LTD-E part is unused and in its original packaging.
Return procedure for HZS12B2LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS12B2LTD-E Tags
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BZT52C5V6T-7
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MM5Z5V1ST1G
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