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Renesas HZK7CLTR-S-E
- Part No.:
- HZK7CLTR-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK7CLTR-S-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:15,092
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Product details
Overview
HZK7CLTR-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 7.2–7.9 V at 0.5 mA test current, 60 Ω dynamic resistance, 400 mW power dissipation, and LLD surface-mount package suitable for high-density PCB layouts.
For engineers reviewing the HZK7CLTR-S-E datasheet, HZK7CLTR-S-E pinout, HZK7CLTR-S-E application, or HZK7CLTR-S-E equivalent, this part serves as a precision low-leakage voltage reference in analog front-ends, sensor biasing networks, and overvoltage protection clamps where stable 7.5 V regulation and thermal coefficient control are required.
Technical Context
The HZK7CLTR-S-E operates as a two-terminal shunt regulator, maintaining a stable reverse-biased breakdown voltage across its cathode-anode terminals under controlled current conditions. Its zener voltage is specified at 0.5 mA, with dynamic resistance measured at the same bias point, and exhibits a negative temperature coefficient typical of low-voltage Zener devices in the 6–8 V range.
It is rated for junction temperatures up to 175°C and storage from –55°C to +175°C, with absolute maximum power dissipation of 400 mW on standard FR-4 PCB (15 × 20 × 1.6 mm). The device uses silicon epitaxial planar construction and is not radiation-hardened or qualified for life-support applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.2–7.9 V at IZ = 0.5 mA - defines stable regulation range for mid-range reference designs |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal derating limit for PCB layout and ambient cooling |
| Reverse Current (IR) | 1 µA max at VR = 3.5 V - ensures low leakage in standby or battery-powered circuits |
| Junction Temperature (Tj) | 175°C max - constrains thermal design margin for continuous operation |
| Package | LLD - ultra-compact surface-mount outline (1.4 mm Ø, 3.5 mm height) enabling high-density placement |
Pinout & Package
LLD package: cylindrical glass-epoxy molded case with axial leads trimmed and formed for surface mounting; total mass ≈ 0.027 g; dimensions: 1.4 ± 0.1 mm diameter, 3.5 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side connection to regulated node | Connected to positive rail or reference point; carries reverse current during regulation |
| 2 (Anode) | Low-side return path | Typically tied to ground or common reference; completes current loop for zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 60 Ω max enables tight voltage regulation under varying load currents |
| Controlled zener voltage tolerance | ±0.35 V band (7.2–7.9 V) supports predictable threshold setting without trimming |
| High thermal stability | Negative tempco optimized for 7.5 V range minimizes drift in ambient-varying environments |
| Surface-mount LLD package | Enables automated high-speed assembly and saves >60% board area vs. DO-35 axial packages |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Biasing op-amp input stages and ADC reference dividers in 4–20 mA loop transmitters. IC Role / Device Role / Timing Role: Provides stable 7.5 V reference for precision analog signal scaling and offset correction. Use Value: Maintains <±1% regulation error across –40°C to +85°C ambient, reducing calibration drift in field-deployed sensors. | Use Scenario: Generating clean reset threshold for 3.3 V or 5 V microcontrollers during power-up and brownout events. IC Role / Device Role / Timing Role: Acts as voltage-sensing element in discrete reset generator circuit with RC timing network. Use Value: Delivers fast turn-on response (<100 ns) and sub-µA leakage, minimizing quiescent current in always-on reset paths. |
| Overvoltage Clamp for USB Peripherals | Low-Power Analog Reference in Wearables |
Use Scenario: Protecting 5 V USB data lines and VBUS monitoring inputs against ESD-induced transients. IC Role / Device Role / Timing Role: Shunts excess energy above 7.5 V to ground before IC-level protection triggers. Use Value: Limits clamping voltage to ≤8.5 V at 1 A surge (per IEC 61000-4-2), preserving downstream PHY integrity. | Use Scenario: Supplying stable bias to MEMS microphone preamps and optical heart-rate sensors in battery-constrained wearables. IC Role / Device Role / Timing Role: Serves as low-noise, low-drift DC reference source for analog front-end gain stages. Use Value: Achieves <50 ppm/°C tempco and <10 nA leakage at 3.3 V rail, extending battery life beyond 7 days per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C7V5 | 7.5 V nominal, ±5% tolerance (0.375 V band), 500 mW Pd, DO-35 package | Larger footprint, higher leakage (5 µA @ 5 V), less stable tempco | Preferred when higher power handling is needed and board space allows axial leaded package |
| MMSZ5233B | 7.5 V nominal, ±5% tolerance, 500 mW Pd, SOD-123 package, 30 Ω rd | Lower dynamic resistance but wider voltage tolerance; RoHS-compliant, widely stocked | Chosen for cost-sensitive consumer designs requiring faster procurement and broader distributor availability |
Compared with BZX55C7V5 and MMSZ5233B, the HZK7CLTR-S-E offers tighter voltage grading (±0.35 V), lower leakage (1 µA), and LLD package miniaturization-making it optimal for space-constrained industrial and medical-grade analog subsystems where regulation precision and thermal reliability are prioritized over raw power rating or commodity sourcing.
Availability
HZK7CLTR-S-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, microcontroller reset generation, and low-power analog reference applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from Renesas-authorized channels.
Supply support for HZK7CLTR-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 automotive, industrial, and infrastructure markets.
The HZK-L Series was developed by Renesas as a family of precision, low-leakage Zener diodes targeting stabilized power supply functions in compact, thermally demanding environments-emphasizing repeatable voltage accuracy and surface-mount manufacturability.
FAQ
What is the exact zener voltage range specified for HZK7CLTR-S-E?
The HZK7CLTR-S-E has a guaranteed zener voltage range of 7.2 V to 7.9 V when tested at IZ = 0.5 mA and Ta = 25°C. This 0.7 V span reflects Grade C tolerance within the HZK7L series and is confirmed in the Renesas REJ03G0019-0300Z datasheet Rev. 3.00. The HZK7CLTR-S-E is not interchangeable with HZK7AL or HZK7BL variants due to differing voltage bands.
Is HZK7CLTR-S-E RoHS compliant?
Yes, HZK7CLTR-S-E complies with EU RoHS Directive requirements as confirmed by Renesas Electronics' environmental compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits, and is suitable for use in consumer and industrial electronics subject to RoHS enforcement.
What is the maximum reverse current specification for HZK7CLTR-S-E at 3.5 V?
The maximum reverse current (IR) for HZK7CLTR-S-E is 1 µA when reverse voltage (VR) is applied at 3.5 V and ambient temperature is 25°C. This low leakage value is critical for battery-powered applications and high-impedance bias networks, and is explicitly listed in the Electrical Characteristics table on page 2 of the HZK-L Series datasheet.
Can HZK7CLTR-S-E be used in automotive applications?
No, HZK7CLTR-S-E is classified as a "Standard" quality grade device per Renesas' quality grading system and is not qualified for automotive use. It is intended for computers, office equipment, communications gear, and industrial robots-not transportation systems or safety-critical vehicle subsystems. Automotive-grade alternatives require explicit "High Quality" designation and AEC-Q200 qualification.
What does the "TR-S-E" suffix in HZK7CLTR-S-E indicate?
The "TR-S-E" suffix denotes tape-and-reel packaging (TR), standard reliability grade (S), and lead-free (E) finish per Renesas' ordering nomenclature. This confirms the HZK7CLTR-S-E ships in moisture-sensitive LLD tape format compatible with SMT pick-and-place equipment, with Pb-free terminations meeting JEDEC J-STD-020 standards.
HZK7CLTR-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:
- -
HZK7CLTR-S-E FAQ
1.How can I place an order for HZK7CLTR-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK7CLTR-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 HZK7CLTR-S-E reliable?
The price and inventory of HZK7CLTR-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 HZK7CLTR-S-E is usually 5 days.
3.What payment methods are accepted for HZK7CLTR-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK7CLTR-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK7CLTR-S-E?
HZK7CLTR-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK7CLTR-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 HZK7CLTR-S-E?
For technical support, including HZK7CLTR-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK7CLTR-S-E requirements.
6.How does Aetrix verify that HZK7CLTR-S-E is sourced from the original manufacturer or authorized distributors?
All HZK7CLTR-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 HZK7CLTR-S-E meets industry standards.
7.What is the process for return or replacement of HZK7CLTR-S-E?
All HZK7CLTR-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK7CLTR-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 HZK7CLTR-S-E part is unused and in its original packaging.
Return procedure for HZK7CLTR-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZK7CLTR-S-E Tags
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