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Renesas HZK12C-JTR
- Part No.:
- HZK12C-JTR
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK12C-JTR.pdf
- Description:
- DIODE ZENER
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Inventory:7,500
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Product details
Overview
HZK12C-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 13.2–14.3 V at 5 mA test current, 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 HZK12C-JTR datasheet, HZK12C-JTR pinout, HZK12C-JTR application, or HZK12C-JTR equivalent, key selection criteria include zener voltage tolerance (Grade C), low dynamic impedance, thermal stability up to 175°C junction temperature, LLD surface-mount package compatibility, and compliance with Renesas Standard quality grade for industrial equipment.
Technical Context
The HZK12C-JTR employs a silicon epitaxial planar junction structure optimized for stable reverse-breakdown behavior under DC bias. Its zener voltage is specified at 5 mA with ±0.5 V tolerance (13.2–14.3 V), and exhibits a temperature coefficient of approximately +8.5 mV/°C near 12 V, as confirmed by Figure 2 in the datasheet.
It is rated for 500 mW power dissipation on PCB, with derating starting above 25°C ambient per Figure 3. The device features low leakage (IR ≤1 µA at VR = 9.5 V) and is intended for use in fixed-voltage reference, feedback sensing, and clamp applications where tight voltage regulation and thermal robustness are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.2–14.3 V at IZ = 5 mA - defines regulated output voltage window for reference design |
| Dynamic Resistance (rd) | ≤35 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 500 mW at Ta = 25°C - sets maximum continuous DC power handling on standard PCB |
| Reverse Current (IR) | ≤1 µA at VR = 9.5 V - guarantees low standby leakage in high-impedance bias networks |
| Junction Temperature (Tj) | 175°C - enables operation in thermally demanding industrial environments without derating failure |
| Package | LLD - ultra-compact surface-mount outline (1.4 mm Ø, 0.027 g) for high-density PCB layout |
Pinout & Package
The HZK12C-JTR uses the LLD package: a glass-passivated, axial-lead–style surface-mount diode with cathode band marking. Dimensions: φ1.4 ±0.1 mm body diameter, 3.5 mm length, mass 0.027 g. Mounting requires standard reflow profile for epoxy-glass PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Breakdown Anode Connection | Connected to higher-potential rail; reverse-biased terminal where regulated voltage develops |
| 2 (Anode) | Reference Ground Node | Typically tied to circuit common or feedback node; establishes reference polarity for clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 35 Ω enables <10 mV output shift per 0.35 mA load change - critical for stable feedback loops |
| Grade C voltage tolerance | ±0.55 V total spread (13.2–14.3 V) supports tighter system-level voltage margining than Grade A/B |
| High-temperature operation | Rated to 175°C junction temperature - suitable for enclosed industrial enclosures without forced cooling |
| LLD surface-mount package | 0.027 g mass and 1.4 mm diameter allow placement in space-constrained sensor modules and power management ICs |
Applications
| Industrial Power Supervision | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring 12 V rail in PLC I/O modules to trigger brownout shutdown before logic corruption occurs. IC Role / Device Role / Timing Role: Zener reference element in comparator-based undervoltage detection circuit. Use Value: Tight 13.2–14.3 V tolerance ensures reset activates precisely at 12.5 V ±0.3 V, preventing premature or delayed resets. | Use Scenario: Providing clean, temperature-stable reset threshold for 3.3 V microcontrollers powered from switched 12 V supplies. IC Role / Device Role / Timing Role: Voltage reference for RC-delayed reset generator with hysteresis. Use Value: Low 35 Ω impedance minimizes voltage droop during reset assertion, ensuring reliable MCU initialization across –40°C to +85°C. |
| DC-DC Feedback Clamp | Overvoltage Protection in Sensor Interface |
Use Scenario: Clamping secondary-side feedback voltage in isolated flyback converters to limit output overshoot during load transients. IC Role / Device Role / Timing Role: Precision shunt regulator in optocoupler feedback path. Use Value: 500 mW rating allows sustained clamping during 100 ms overload events without thermal runaway. | Use Scenario: Protecting analog front-end inputs of current-sense amplifiers exposed to 24 V field wiring surges. IC Role / Device Role / Timing Role: Fast-acting voltage clamp limiting input to 14.3 V absolute maximum. Use Value: 1 µA leakage at 9.5 V prevents signal offset drift in µA-level sensor bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | Zener voltage 12 V ±5% (11.4–12.6 V); 1 W power rating; DO-41 through-hole package | Higher power but larger footprint; less precise voltage tolerance than HZK12C-JTR's Grade C | Choose when board space allows through-hole mounting and 1 W dissipation is needed |
| BZX55C12 | Zener voltage 12 V ±5%; 500 mW rating; DO-35 glass package; higher leakage (≤5 µA) | Same power rating but inferior leakage and thermal performance (Tj max = 150°C) | Choose only if legacy DO-35 footprint must be retained and leakage <1 µA is not critical |
Compared with 1N4742A and BZX55C12, the HZK12C-JTR offers tighter voltage tolerance (±0.55 V vs. ±0.6 V or ±0.6 V), lower leakage (≤1 µA), and higher junction temperature rating (175°C), making it preferable for compact, thermally constrained industrial designs requiring long-term stability.
Availability
HZK12C-JTR is available at Aetrix Electronics and suitable for industrial power supervision, microcontroller reset circuits, and DC-DC feedback clamp applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for HZK12C-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, with global design and manufacturing infrastructure.
The HZK Series was developed specifically for stabilized power supply applications in industrial and office equipment, emphasizing low leakage, tight voltage tolerance, and high-temperature reliability in compact surface-mount form factors.
FAQ
What is the exact zener voltage range for HZK12C-JTR?
The HZK12C-JTR has a guaranteed zener voltage range of 13.2 V to 14.3 V when tested at IZ = 5 mA and Ta = 25°C. This Grade C tolerance reflects ±0.55 V total spread, tighter than Grade A or B variants in the same HZK family, and is confirmed in the Electrical Characteristics table on page 3 of the official Renesas datasheet REJ03G0018-0300Z.
Does HZK12C-JTR support surface-mount assembly?
Yes, the HZK12C-JTR uses the LLD package - a leadless, cylindrical surface-mount outline with 1.4 mm diameter and 3.5 mm length. It is qualified for standard reflow soldering on FR-4 PCBs and is explicitly designated for "high density surface mounting and high speed assembly" per the Renesas datasheet ordering information section.
What is the maximum allowable junction temperature for HZK12C-JTR?
The maximum junction temperature (Tj) for HZK12C-JTR is 175°C, as specified in the Absolute Maximum Ratings table on page 2 of the Renesas datasheet. This rating applies under steady-state DC operation with proper PCB thermal relief and is validated for continuous operation in industrial-grade equipment per Renesas Standard quality grade classification.
How does the dynamic resistance of HZK12C-JTR affect regulation accuracy?
The dynamic resistance of HZK12C-JTR is ≤35 Ω at IZ = 5 mA. This value directly determines output voltage variation under changing load current: for example, a 0.35 mA change in zener current causes ≤12.25 mV shift in VZ. This low rd supports stable regulation in feedback and reference circuits where precision matters more than raw power handling.
Is HZK12C-JTR compliant with RoHS and environmental regulations?
Yes, HZK12C-JTR complies with the EU RoHS Directive and other applicable environmental regulations. Renesas Electronics confirms RoHS compliance for the HZK Series in its product environmental documentation, and the device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. Full compliance data is available via Renesas' official environmental portal.
HZK12C-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:
- -
HZK12C-JTR FAQ
1.How can I place an order for HZK12C-JTR through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK12C-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 HZK12C-JTR reliable?
The price and inventory of HZK12C-JTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZK12C-JTR is usually 5 days.
3.What payment methods are accepted for HZK12C-JTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK12C-JTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK12C-JTR?
HZK12C-JTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK12C-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 HZK12C-JTR?
For technical support, including HZK12C-JTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK12C-JTR requirements.
6.How does Aetrix verify that HZK12C-JTR is sourced from the original manufacturer or authorized distributors?
All HZK12C-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 HZK12C-JTR meets industry standards.
7.What is the process for return or replacement of HZK12C-JTR?
All HZK12C-JTR units undergo pre-shipment inspection (PSI). If there is an issue with HZK12C-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 HZK12C-JTR part is unused and in its original packaging.
Return procedure for HZK12C-JTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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