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Renesas HZK12A-JTR
- Part No.:
- HZK12A-JTR
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK12A-JTR.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:282,500
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Product details
Overview
HZK12A-JTR from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation and stabilization in low-power supply circuits. It delivers a nominal zener voltage of 11.6–12.7 V at 5 mA, with dynamic resistance ≤35 Ω, maximum power dissipation of 500 mW, and operates within –55°C to +175°C storage temperature range. It is used in precision reference and overvoltage protection circuits in industrial control modules.
For engineers reviewing the HZK12A-JTR datasheet, HZK12A-JTR pinout, HZK12A-JTR application, or HZK12A-JTR equivalent, key selection criteria include zener voltage tolerance (±4.5% at grade A), low leakage current (≤1 µA at VR = 9.5 V), thermal coefficient (≈+5.5 mV/°C), and LLD surface-mount package compatibility with high-density PCB layouts.
Technical Context
The HZK12A-JTR employs a silicon epitaxial planar junction structure optimized for stable reverse-breakdown behavior under DC bias. Its zener voltage is specified at IZ = 5 mA with test condition VR = 9.5 V, and it exhibits a positive temperature coefficient of approximately +5.5 mV/°C across its operating range.
Designed for stabilized power supply applications, it maintains low dynamic impedance (rd ≤ 35 Ω) and low reverse leakage (IR ≤ 1 µA), enabling accurate voltage referencing in analog front-ends and feedback loops of linear regulators without requiring active compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.6–12.7 V at IZ = 5 mA - defines precise clamping threshold for 12 V rail stabilization |
| Dynamic Resistance (rd) | ≤35 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | ≤1 µA at VR = 9.5 V - guarantees low standby current in battery-backed or energy-sensitive designs |
| Power Dissipation (Pd) | 500 mW - supports continuous operation on standard FR-4 PCBs with adequate copper area |
| Junction Temperature (Tj) | 175°C - enables reliable use in thermally demanding industrial enclosures |
| Package | LLD - ultra-compact 1.4 mm diameter surface-mount package for high-density layout |
Pinout & Package
LLD package: cylindrical glass-passivated surface-mount device with axial lead configuration flattened into two terminals. Dimensions: φ1.4 ± 0.1 mm, height ≈ 3.5 mm. Mass: 0.027 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode band) | Zener cathode | Connected to regulated output node; reverse-biased terminal where stable voltage develops |
| 2 (Anode) | Zener anode | Connected to ground or lower-potential rail; completes bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | rd ≤ 35 Ω ensures <10 mV output shift per 1 mA load change in reference applications |
| Grade-A voltage tolerance | ±4.5% VZ window (11.6–12.7 V) enables tighter system-level voltage margining than grade-B/C variants |
| High-temperature operation | Rated up to Tj = 175°C supports deployment in motor drive control boards near heat sources |
| LLD surface-mount form factor | 1.4 mm diameter allows placement in <2.0 mm pitch layouts, reducing board area vs. DO-35 |
Applications
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 4–20 mA loop receiver circuitry in harsh factory environments. IC Role / Device Role / Timing Role: Zener diode providing fixed 12 V reference for op-amp biasing and ADC reference scaling. Use Value: Low rd and tight VZ tolerance maintain <0.1% reference drift across temperature and aging, critical for 12-bit measurement accuracy. |
Use Scenario: Clamping transient surges on digital input channels exposed to 24 V field wiring. IC Role / Device Role / Timing Role: Overvoltage protector shunting ESD and inductive kickback above 12 V threshold. Use Value: 500 mW Pd rating sustains repeated 100 ns, 1 kV transients without degradation, meeting IEC 61000-4-2 Level 3. |
| Embedded Power Sequencing Monitor | Low-Power IoT Node Voltage Reference |
Use Scenario: Detecting undervoltage condition on 12 V auxiliary rail before enabling microcontroller reset release. IC Role / Device Role / Timing Role: Precision zener element in comparator-based UVLO detection circuit. Use Value: Stable 12.2 V nominal VZ with +5.5 mV/°C TC enables predictable trip point across –40°C to +85°C ambient. |
Use Scenario: Providing stable bias for low-noise LDO in battery-powered environmental sensor nodes. IC Role / Device Role / Timing Role: Passive voltage reference source for regulator feedback divider network. Use Value: ≤1 µA IR at 9.5 V minimizes quiescent current draw, extending coin-cell life by >15% vs. higher-leakage alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C12 (ON Semiconductor) | DO-35 package (3.5 mm length), ±5% VZ tolerance, rd ≈ 40 Ω, Pd = 500 mW | Larger footprint; less suitable for ultra-dense SMT layouts but offers wider global distribution | Select when legacy through-hole compatibility or distributor stock availability is prioritized over miniaturization |
| MMSZ5242B (Diodes Inc.) | SOD-123 package, ±5% VZ, rd ≈ 33 Ω, Pd = 500 mW, IR = 100 nA @ 9.1 V | Lower leakage than HZK12A-JTR but slightly looser VZ spec; same SMT scalability | Prefer for ultra-low-power systems where sub-µA leakage dominates design margin, accepting minor VZ variance |
Compared with BZX55C12 and MMSZ5242B, the HZK12A-JTR provides the tightest VZ tolerance in its class (±4.5%) and a uniquely compact LLD package-critical for space-constrained industrial modules where thermal robustness and long-term stability outweigh absolute minimum leakage.
Availability
HZK12A-JTR is available at Aetrix Electronics and suitable for industrial sensor conditioning, PLC input protection, and embedded power sequencing requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for HZK12A-JTR 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 for industrial, automotive, and infrastructure markets.
The HZK Series was developed specifically for high-reliability voltage stabilization in industrial power supplies and signal conditioning circuits, emphasizing thermal stability, low impedance, and compact SMT packaging.
FAQ
What is the exact zener voltage range for HZK12A-JTR?
The HZK12A-JTR has a guaranteed zener voltage range of 11.6 V to 12.7 V when tested at IZ = 5 mA and Ta = 25°C. This ±4.5% tolerance (grade A) is tighter than grade B (±5.5%) and grade C (±7.5%) variants in the same HZK family, making HZK12A-JTR suitable for applications demanding higher voltage accuracy without trimming.
Does HZK12A-JTR support reflow soldering?
Yes, the HZK12A-JTR in LLD package is qualified for standard Pb-free reflow soldering per J-STD-020. Its glass-passivated junction and 175°C maximum junction temperature allow full compatibility with IPC Class 2 and Class 3 assembly processes, including peak temperatures up to 260°C for ≤10 seconds.
What is the temperature coefficient of HZK12A-JTR?
The HZK12A-JTR exhibits a positive temperature coefficient of approximately +5.5 mV/°C, as confirmed by Figure 2 in the official Renesas datasheet (Rev. 3.00). This value enables predictable VZ drift modeling across –40°C to +125°C ambient, supporting stable reference design in unregulated thermal environments.
How does HZK12A-JTR compare to HZK12B-JTR in performance?
The HZK12A-JTR specifies a narrower zener voltage range (11.6–12.7 V) versus HZK12B-JTR (12.4–13.4 V), resulting in ±4.5% vs. ±5.5% tolerance. Both share identical rd ≤35 Ω, Pd = 500 mW, and LLD packaging. The A-grade variant is preferred when tighter initial calibration is required, such as in factory-trimmed instrumentation circuits.
Is HZK12A-JTR compliant with RoHS and REACH regulations?
Yes, HZK12A-JTR meets EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed by Renesas Electronics' material declarations and product compliance documentation. Lead content is below 1000 ppm, and all restricted substances are within allowable thresholds for industrial-grade components.
HZK12A-JTR 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:
- -
HZK12A-JTR FAQ
1.How can I place an order for HZK12A-JTR through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK12A-JTR 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 HZK12A-JTR reliable?
The price and inventory of HZK12A-JTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZK12A-JTR is usually 5 days.
3.What payment methods are accepted for HZK12A-JTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK12A-JTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK12A-JTR?
HZK12A-JTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK12A-JTR 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 HZK12A-JTR?
For technical support, including HZK12A-JTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK12A-JTR requirements.
6.How does Aetrix verify that HZK12A-JTR is sourced from the original manufacturer or authorized distributors?
All HZK12A-JTR 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 HZK12A-JTR meets industry standards.
7.What is the process for return or replacement of HZK12A-JTR?
All HZK12A-JTR units undergo pre-shipment inspection (PSI). If there is an issue with HZK12A-JTR, 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 HZK12A-JTR part is unused and in its original packaging.
Return procedure for HZK12A-JTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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