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Renesas HZK12ALTL-S-E
- Part No.:
- HZK12ALTL-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK12ALTL-S-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
HZK12ALTL-S-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation and stabilization in low-power supply circuits, with a nominal zener voltage of 12.4 V (Grade B), 500 mW power dissipation, 35 Ω dynamic resistance at 5 mA, and LLD surface-mount package. It operates reliably across –55°C to +175°C storage temperature and supports precision reference applications in industrial power supplies.
For engineers reviewing the HZK12ALTL-S-E datasheet, HZK12ALTL-S-E pinout, HZK12ALTL-S-E application, or HZK12ALTL-S-E equivalent, key selection criteria include zener voltage tolerance (±0.9 V), low leakage current (≤1 µA at 9.5 V), thermal coefficient (–1.5 mV/°C), and compatibility with high-density PCB assembly using the LLD footprint.
Technical Context
This Zener diode employs a silicon epitaxial planar junction structure optimized for stable reverse-breakdown behavior under DC bias. Its design targets low dynamic impedance (35 Ω @ 5 mA) and tight voltage regulation over temperature, with a negative temperature coefficient of –1.5 mV/°C typical for the 12 V range.
The device is rated for 500 mW power dissipation on a standard PCB, with maximum junction temperature of 175°C and thermal derating beginning above 25°C ambient. It is not intended for surge suppression or transient clamping-its specification set is strictly for steady-state voltage reference and biasing functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.4 V (min 12.4 V, max 13.4 V at IZ = 5 mA); defines stable regulation point for feedback or reference circuits |
| Power Dissipation (Pd) | 500 mW; maximum continuous DC power on standard PCB; requires thermal layout consideration above 25°C ambient |
| Dynamic Resistance (rd) | 35 Ω at IZ = 5 mA; determines output impedance and load regulation sensitivity in shunt regulator designs |
| Reverse Leakage Current (IR) | ≤1 µA at VR = 9.5 V; ensures minimal quiescent current draw in standby or low-power reference nodes |
| Temperature Coefficient (γZ) | –1.5 mV/°C; enables predictable voltage drift compensation in temperature-stable references |
| Junction Temperature (Tj) | 175°C maximum; sets upper limit for thermal design margin in enclosed or high-ambient environments |
Pinout & Package
The HZK12ALTL-S-E is housed in an LLD (Leadless Low-profile Diode) surface-mount package, measuring 1.4 mm diameter × 1.35 mm height, with 0.027 g mass and glass epoxy PCB compatibility. It features a two-terminal configuration optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; polarity critical-reverse-biased during operation |
| 2 (Anode) | Reference ground/reference return | Typically tied to system ground or bias return path; completes current loop for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 35 Ω at 5 mA enables tight regulation under varying load currents in shunt configurations |
| Wide zener voltage range coverage | Part of HZK Series spanning 1.9 V–38 V, allowing standardized design reuse across multiple supply rails |
| LLD surface-mount package | Compact 1.4 mm Ø footprint supports high-density PCB layouts and high-speed pick-and-place assembly |
| Stable temperature coefficient | –1.5 mV/°C allows predictable drift modeling and compensation in precision analog circuits |
Applications
| Industrial Power Supply Reference | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 12.4 V reference for feedback loop in isolated DC-DC converter secondary side. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output regulation threshold. Use Value: Maintains ±1% output accuracy over temperature due to low rd and known γZ. | Use Scenario: Generating clean reset signal for 3.3 V microcontrollers using resistor-divider + Zener clamp. IC Role / Device Role / Timing Role: Precision voltage clamp defining logic-high threshold for reset IC input. Use Value: Ensures reliable reset assertion at exactly 12.4 V with sub-µA leakage preventing false triggers. |
| Automotive Sensor Biasing | Programmable Current Source Reference |
Use Scenario: Supplying stable bias voltage to analog sensor front-end in engine control unit. IC Role / Device Role / Timing Role: Low-drift voltage source for op-amp reference inputs in harsh-temperature environments. Use Value: Delivers consistent 12.4 V reference across –40°C to +125°C ambient via verified Tj derating curve. | Use Scenario: Setting reference voltage for LM334-based constant-current circuit in LED driver feedback. IC Role / Device Role / Timing Role: Fixed VZ node defining ISET in two-terminal current source topology. Use Value: Enables accurate 10 mA current setting with <1% error contribution from zener tolerance and rd. |
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 |
|---|---|---|---|
| BZX55C12 (ON Semiconductor) | Same 12 V nominal, 500 mW rating, but TO-92 through-hole; rd = 40 Ω; ±5% tolerance vs. HZK12ALTL-S-E's ±0.9 V grade B | Requires PCB through-hole layout; less suitable for high-density SMT production | Select when legacy through-hole assembly or higher voltage tolerance is acceptable |
| MMSZ5242B (Diodes Inc.) | SOD-123 package, 12 V, 500 mW, rd = 30 Ω, tighter ±5% tolerance; RoHS-compliant, no lead exemption | Smaller 2.7 × 1.4 mm footprint than LLD; slightly lower rd improves regulation | Prefer for space-constrained boards where SOD-123 fits and RoHS compliance is mandatory |
Compared with BZX55C12 and MMSZ5242B, the HZK12ALTL-S-E offers superior voltage tolerance (±0.9 V vs. ±5%), identical power rating, and LLD package geometry optimized for Renesas-designated high-speed SMT lines-making it ideal for volume industrial PCBs requiring tight regulation and process consistency.
Availability
HZK12ALTL-S-E is available at Aetrix Electronics and suitable for industrial power supplies, microcontroller reset circuits, automotive sensor biasing, and programmable current source references requiring stable component supply and long-term obsolescence management.
Supply support for HZK12ALTL-S-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 HZK Series was developed by Renesas Electronics as a family of precision silicon Zener diodes targeting stable voltage reference and regulation in cost-sensitive, high-reliability power supply designs-emphasizing low leakage, low impedance, and robust thermal performance.
FAQ
What is the exact zener voltage range for HZK12ALTL-S-E?
The HZK12ALTL-S-E has a guaranteed zener voltage range of 12.4 V to 13.4 V at test current IZ = 5 mA, corresponding to Grade B specification per Renesas' HZK Series datasheet Rev.3.00. This 1.0 V window reflects tight process control for precision reference use, and the value is measured under DC conditions with specified thermal mounting.
Is HZK12ALTL-S-E RoHS compliant?
Yes, HZK12ALTL-S-E complies with EU RoHS Directive requirements. Renesas Electronics confirms RoHS compliance for the HZK Series in its environmental documentation, and the LLD package contains no lead exemptions-consistent with post-2006 manufacturing standards and verified through material declarations.
What is the maximum allowable ambient temperature for continuous operation of HZK12ALTL-S-E?
The HZK12ALTL-S-E can operate continuously up to +125°C ambient temperature when mounted on a standard PCB, based on its 500 mW power rating and thermal derating curve in the datasheet. Above 25°C, power must be linearly reduced per the Pd vs. Ta graph, reaching zero dissipation at +150°C ambient.
Does HZK12ALTL-S-E support transient voltage suppression?
No, HZK12ALTL-S-E is not designed for transient suppression. It is a precision DC Zener diode rated only for steady-state regulation. Its 500 mW power rating applies to continuous DC dissipation-not peak pulse energy-and it lacks specified surge current or clamping response time metrics required for TVS applications.
What does the "-S-E" suffix in HZK12ALTL-S-E indicate?
The "-S-E" suffix denotes Renesas' internal packaging and marking variant: "S" indicates standard-grade reliability (per Renesas quality classification), and "E" specifies tape-and-reel packaging format (10,000 pcs per reel) with embossed carrier tape-confirmed in Renesas ordering information tables for the HZK Series.
HZK12ALTL-S-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:
- -
HZK12ALTL-S-E FAQ
1.How can I place an order for HZK12ALTL-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK12ALTL-S-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 HZK12ALTL-S-E reliable?
The price and inventory of HZK12ALTL-S-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZK12ALTL-S-E is usually 5 days.
3.What payment methods are accepted for HZK12ALTL-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK12ALTL-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK12ALTL-S-E?
HZK12ALTL-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK12ALTL-S-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 HZK12ALTL-S-E?
For technical support, including HZK12ALTL-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK12ALTL-S-E requirements.
6.How does Aetrix verify that HZK12ALTL-S-E is sourced from the original manufacturer or authorized distributors?
All HZK12ALTL-S-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 HZK12ALTL-S-E meets industry standards.
7.What is the process for return or replacement of HZK12ALTL-S-E?
All HZK12ALTL-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK12ALTL-S-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 HZK12ALTL-S-E part is unused and in its original packaging.
Return procedure for HZK12ALTL-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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