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Renesas HZK9ALTR-S-E
- Part No.:
- HZK9ALTR-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK9ALTR-S-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
HZK9ALTR-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 8.3–9.1 V (Grade B), 400 mW power dissipation, 60 Ω dynamic resistance at 0.5 mA test current, and LLD surface-mount package. It serves in precision reference and overvoltage protection roles within industrial power management modules.
For engineers reviewing the HZK9ALTR-S-E datasheet, HZK9ALTR-S-E pinout, HZK9ALTR-S-E application, or HZK9ALTR-S-E equivalent, key selection criteria include zener voltage tolerance (±5% Grade B), low leakage current (<1 µA at VR = 6.0 V), thermal coefficient (−2.5 mV/°C typical), and compatibility with high-density PCB assembly using LLD footprint.
Technical Context
The HZK9ALTR-S-E operates as a two-terminal voltage reference device relying on controlled reverse-breakdown characteristics of a doped silicon junction. Its zener voltage is specified at IZ = 0.5 mA DC, with dynamic resistance measured under same conditions to ensure stable regulation across load variations.
Designed for ambient temperatures from −55°C to +175°C, it maintains rated performance up to 125°C ambient before derating begins per Fig.3; junction temperature must not exceed 175°C. The LLD package enables automated placement and reflow soldering without lead bending or through-hole constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.3–9.1 V at IZ = 0.5 mA - defines stable regulation point for low-current references |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling on standard PCB |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage (IR) | <1 µA at VR = 6.0 V - ensures minimal quiescent current in standby or sensing circuits |
| Junction Temperature (Tj) | 175°C max - defines absolute thermal limit for reliability under sustained power stress |
| Package | LLD - 1.4 mm diameter cylindrical SMD package optimized for pick-and-place and high-density layout |
Pinout & Package
LLD package: axial-leaded cylindrical surface-mount device with cathode band marking; no internal leads - terminals are exposed metal ends of silicon die encapsulated in epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode Band End) | Cathode | Connected to higher-potential node; reverse-biased operation requires this terminal at voltage ≥ VZ above anode |
| 2 (Opposite End) | Anode | Reference/ground node; current flows from cathode to anode during zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 60 Ω max ensures tight voltage regulation under varying load currents in feedback paths |
| Wide zener voltage range (5.2–38 V) | Enables single-family selection across multiple supply rails without redesigning reference topology |
| LLD surface-mount package | 1.4 mm diameter × 3.5 mm length supports automated assembly and saves >60% board area vs. DO-35 |
| High junction temperature rating | 175°C Tj allows operation in thermally constrained enclosures such as sealed industrial controllers |
Applications
| Voltage Reference for ADC Biasing | Overvoltage Clamp in Sensor Interface |
|---|---|
Use Scenario: Provides stable 8.7 V reference for 12-bit SAR ADC bias network in programmable logic controller analog input module. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage independent of supply ripple. Use Value: Maintains <±0.5% reference accuracy over −40°C to +85°C due to matched thermal coefficient and low rd. | Use Scenario: Clamps transient spikes on 9 V sensor supply rail in automotive cabin temperature sensor unit. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting surge current when rail exceeds 9.1 V. Use Value: Responds within nanoseconds to transients up to 400 mW peak power without degradation, per JEDEC JESD22-A108 stress testing. |
| Low-Power Microcontroller Reset Circuit | Industrial SMPS Feedback Divider |
Use Scenario: Generates clean reset threshold for ARM Cortex-M0+ MCU in battery-powered remote I/O node. IC Role / Device Role / Timing Role: Zener-based threshold detector feeding RC delay into reset pin. Use Value: Draws only 0.8 µA leakage at 6 V, extending shelf life of coin-cell backup by >2 years. | Use Scenario: Sets upper divider node in optocoupler feedback loop of 24 V industrial flyback converter. IC Role / Device Role / Timing Role: Precision voltage node defining regulation setpoint for TL431 secondary-side controller. Use Value: 60 Ω rd minimizes load-induced error on feedback voltage, improving output regulation to ±1.2% over line/load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C8V2 (ON Semiconductor) | DO-35 package, 8.2 V nominal, 500 mW Pd, 70 Ω rd, ±5% tolerance | Through-hole mounting required; higher rd reduces regulation precision in low-current feedback | Select if legacy through-hole assembly or higher power margin is needed; not drop-in for LLD footprint |
| MMSZ4687 (Diodes Inc.) | SOD-123 package, 8.2 V nominal, 500 mW Pd, 40 Ω rd, ±5% tolerance | Smaller 2.7 × 1.4 mm outline; lower rd improves regulation but requires tighter layout control | Choose for space-constrained designs where 0.3 mm height reduction matters; verify thermal relief on copper pour |
Compared with BZX55C8V2 and MMSZ4687, the HZK9ALTR-S-E offers superior thermal stability (−2.5 mV/°C) and proven reliability in industrial temperature cycling, while its LLD package balances manufacturability and thermal mass better than ultra-miniature SOD-123 alternatives.
Availability
HZK9ALTR-S-E is available at Aetrix Electronics and suitable for industrial power management, sensor interface protection, and microcontroller reset circuitry requiring stable component supply and long-term obsolescence support.
Supply support for HZK9ALTR-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.
The HZK-L Series was developed specifically for cost-sensitive, high-reliability voltage reference and clamping applications in industrial equipment, where stable zener characteristics and robust thermal performance are critical.
FAQ
What is the exact zener voltage range for HZK9ALTR-S-E?
The HZK9ALTR-S-E has a guaranteed zener voltage range of 8.3 V to 9.1 V at test current IZ = 0.5 mA, corresponding to Grade B specification per Renesas REJ03G0019-0300Z datasheet Rev.3.00. This tolerance band ensures predictable regulation behavior in production-grade power supply designs without requiring post-manufacturing sorting.
Does HZK9ALTR-S-E support reflow soldering?
Yes, the HZK9ALTR-S-E uses the LLD package, which is qualified for standard Pb-free reflow profiles including JEDEC J-STD-020. Its glass-epoxy construction and 175°C maximum junction temperature allow full compatibility with IPC-A-610 Class 2 and Class 3 assembly processes without derating.
What is the reverse leakage current specification for HZK9ALTR-S-E?
The HZK9ALTR-S-E specifies maximum reverse leakage current of 1 µA at VR = 6.0 V, measured at Ta = 25°C. This low leakage supports energy-efficient designs such as battery-backed real-time clocks and always-on sensor nodes where standby current must remain below 1 µA.
Can HZK9ALTR-S-E replace HZK9BL in existing designs?
Yes, HZK9ALTR-S-E is functionally identical to HZK9BL - both are Grade B devices in the HZK9L family with matching 8.3–9.1 V VZ, 60 Ω rd, and LLD packaging. The "TR-S-E" suffix denotes tape-and-reel packaging and RoHS compliance; electrical and thermal specs are unchanged from HZK9BL.
Is HZK9ALTR-S-E suitable for automotive applications?
No - HZK9ALTR-S-E is classified as a "Standard" quality grade device per Renesas documentation, intended for industrial, office, and consumer equipment. It is not qualified to AEC-Q101 or rated for automotive under-hood temperature ranges; use only in non-safety-critical, non-mission-critical systems outside transportation equipment.
HZK9ALTR-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:
- -
HZK9ALTR-S-E FAQ
1.How can I place an order for HZK9ALTR-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK9ALTR-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 HZK9ALTR-S-E reliable?
The price and inventory of HZK9ALTR-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 HZK9ALTR-S-E is usually 5 days.
3.What payment methods are accepted for HZK9ALTR-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK9ALTR-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK9ALTR-S-E?
HZK9ALTR-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK9ALTR-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 HZK9ALTR-S-E?
For technical support, including HZK9ALTR-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK9ALTR-S-E requirements.
6.How does Aetrix verify that HZK9ALTR-S-E is sourced from the original manufacturer or authorized distributors?
All HZK9ALTR-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 HZK9ALTR-S-E meets industry standards.
7.What is the process for return or replacement of HZK9ALTR-S-E?
All HZK9ALTR-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK9ALTR-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 HZK9ALTR-S-E part is unused and in its original packaging.
Return procedure for HZK9ALTR-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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