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Renesas HZK7CTR-S-E
- Part No.:
- HZK7CTR-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK7CTR-S-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
HZK7CTR-S-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation and stabilization in low-power DC supply rails. It delivers a nominal zener voltage of 6.7–7.3 V (Grade B), with 1 µA maximum reverse leakage at 3.5 V, 15 Ω dynamic impedance at 5 mA, and 500 mW power dissipation in the LLD surface-mount package - used in precision reference and overvoltage protection circuits for industrial sensors and power management ICs.
For engineers reviewing the HZK7CTR-S-E datasheet, HZK7CTR-S-E pinout, HZK7CTR-S-E application, or HZK7CTR-S-E equivalent, key selection criteria include verified zener voltage tolerance (±0.6 V), temperature coefficient (≈+2.5 mV/°C), low-profile LLD package compatibility with high-density PCB layouts, and compliance with Renesas' Standard quality grade for office equipment and industrial control applications.
Technical Context
The HZK7CTR-S-E operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting excess current to ground when input exceeds its zener threshold. Its epitaxial planar construction ensures consistent breakdown characteristics and low noise performance under DC bias conditions.
This device exhibits a positive zener voltage temperature coefficient (~+2.5 mV/°C) typical of 6–7 V Zeners, enabling predictable drift behavior in ambient temperature ranges from –55°C to +175°C. It is rated for junction temperatures up to 175°C and requires no external biasing or support circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.7–7.3 V at 5 mA - defines regulated output voltage range for reference or clamp function. |
| Dynamic Impedance (rd) | 15 Ω max at 5 mA - determines regulation accuracy under load transients. |
| Reverse Leakage (IR) | 1 µA max at 3.5 V - ensures minimal standby current in high-impedance bias networks. |
| Power Dissipation (Pd) | 500 mW - sets maximum continuous power handling on standard FR-4 PCB with thermal relief. |
| Junction Temperature (Tj) | –55°C to +175°C - supports operation in extended industrial environments without derating below 25°C ambient. |
| Package | LLD - 2-pin surface-mount package with 1.4 mm diameter cathode band marking; footprint compatible with automated pick-and-place. |
Pinout & Package
The HZK7CTR-S-E uses the LLD package: a cylindrical glass-passivated surface-mount diode with axial lead frame geometry, 1.4 ± 0.1 mm diameter, and 0.027 g mass. Cathode is identified by a colored band; anode is unmarked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; sinks current during zener conduction. |
| 2 (Unbanded End) | Anode | Connected to circuit ground or lowest potential reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 15 Ω enables tight voltage regulation under ±10% load variation at 5 mA. |
| Wide zener voltage spectrum | 6.7–7.3 V (Grade B) provides design margin for ±8.5% tolerance in 7 V rail stabilization. |
| High-temperature operation | Rated to 175°C junction temperature supports use in enclosed power supplies without forced cooling. |
| LLD surface-mount package | Enables high-density placement and reflow-compatible assembly for compact sensor modules and PMIC support rails. |
Applications
| Industrial Sensor Reference | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Provides stable 7 V reference for analog front-end amplifiers in temperature and pressure transducers operating from 9–12 V unregulated supplies. IC Role / Device Role / Timing Role: Shunt voltage reference regulating sensor excitation voltage and ADC reference divider. Use Value: Maintains <±1% output stability over –40°C to +85°C ambient due to predictable +2.5 mV/°C TC and low rd. |
Use Scenario: Generates clean reset threshold for 3.3 V microcontrollers powered via buck converter with ripple-sensitive POR requirements. IC Role / Device Role / Timing Role: Zener-clamped voltage monitor triggering external reset IC or internal brown-out detection. Use Value: Delivers sub-µA leakage and fast turn-on response to ensure reliable reset assertion during supply ramp-up. |
| LED Driver Current Sense | Overvoltage Clamp for RS-485 Transceivers |
Use Scenario: Stabilizes bias voltage for constant-current LED driver ICs in signage and indicator panels with variable input voltage. IC Role / Device Role / Timing Role: Precision voltage reference setting current-sense amplifier gain and feedback loop setpoint. Use Value: Low 15 Ω rd minimizes error contribution to current regulation accuracy (<0.5% full-scale). |
Use Scenario: Protects RS-485 receiver inputs against transient surges exceeding ±15 V common-mode range in factory automation networks. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting bus voltage to safe levels before transceiver damage occurs. Use Value: 500 mW Pd rating sustains 100 ms surge events without thermal runaway or parameter shift. |
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 (ON Semiconductor) | 7.5 V nominal, ±5% tolerance, 100 Ω rd, DO-35 package | Higher impedance and looser tolerance reduce regulation precision in low-noise references | Select when cost sensitivity outweighs regulation accuracy and board space permits larger DO-35 footprint |
| MMSZ5231BT1G (onsemi) | 5.1 V nominal, SOD-123 package, 17 Ω rd, 500 mW rating | Lower voltage rating requires series configuration for 7 V operation; adds layout complexity | Choose only if existing BOM already uses MMSZ5231BT1G and system allows dual-diode stacking |
Compared with BZX55C7V5 and MMSZ5231BT1G, the HZK7CTR-S-E offers tighter 6.7–7.3 V tolerance, lower 15 Ω dynamic impedance, and LLD package compatibility with high-density SMT lines - making it optimal for space-constrained industrial reference designs requiring stable 7 V clamping without external compensation.
Availability
HZK7CTR-S-E is available at Aetrix Electronics and suitable for industrial sensor reference, microcontroller reset circuit, and LED driver current sense applications requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant sourcing.
Supply support for HZK7CTR-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 SoC solutions for industrial, automotive, and enterprise applications.
The HZK Series was developed as a family of general-purpose silicon Zener diodes targeting stabilized DC power supply functions in Standard-grade applications such as office equipment, test instrumentation, and industrial control systems.
FAQ
What is the exact zener voltage range specified for HZK7CTR-S-E?
The HZK7CTR-S-E is graded as Type HZK7B, with a guaranteed zener voltage range of 6.7 V to 7.3 V measured at 5 mA test current and 25°C ambient temperature. This 0.6 V span reflects the device's Grade B tolerance, and actual units fall within this band without binning or post-test selection. The HZK7CTR-S-E maintains this specification across its full operating temperature range when applied within absolute maximum ratings.
Does HZK7CTR-S-E have a documented temperature coefficient, and how does it affect circuit performance?
Yes, the HZK7CTR-S-E exhibits a positive zener voltage temperature coefficient of approximately +2.5 mV/°C near its 7 V operating point, as confirmed in Figure 2 of the official Renesas datasheet. This means its regulated voltage increases linearly with rising junction temperature - a predictable behavior that allows designers to compensate in precision references or accept controlled drift in non-critical clamping roles. The coefficient remains stable across the –55°C to +175°C storage range.
Is HZK7CTR-S-E compliant with RoHS and lead-free assembly requirements?
Yes, the HZK7CTR-S-E meets EU RoHS Directive requirements and is compatible with lead-free reflow soldering profiles. Renesas confirms environmental compliance in its product documentation and specifies that all HZK Series devices manufactured after 2006 conform to RoHS restrictions on lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. The LLD package uses matte tin-plated terminations suitable for Pb-free SAC305 solder processes.
Can HZK7CTR-S-E be used in place of older NEC-branded HZK7B diodes?
Yes, the HZK7CTR-S-E is the direct successor to the original NEC HZK7B, retaining identical electrical specifications, LLD package dimensions, pinout, and marking scheme. Following the April 2010 merger of NEC Electronics and Renesas Technology, Renesas assumed full responsibility for the HZK Series and continues manufacturing with unchanged process and test criteria - ensuring full form-fit-function compatibility with legacy NEC HZK7B units in existing designs.
What is the maximum allowable reverse voltage before breakdown for HZK7CTR-S-E?
The HZK7CTR-S-E begins controlled zener breakdown at its specified 6.7–7.3 V range and is not rated for sustained reverse voltage below that threshold. Its absolute maximum reverse voltage is defined by the test condition VR = 3.5 V (where IR ≤ 1 µA); applying >3.5 V in non-breakdown mode risks exceeding leakage limits. For reliable operation, the device must be biased above its nominal VZ with appropriate current limiting - never used as a blocking diode below VZ.
HZK7CTR-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:
- -
HZK7CTR-S-E FAQ
1.How can I place an order for HZK7CTR-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK7CTR-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 HZK7CTR-S-E reliable?
The price and inventory of HZK7CTR-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 HZK7CTR-S-E is usually 5 days.
3.What payment methods are accepted for HZK7CTR-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK7CTR-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK7CTR-S-E?
HZK7CTR-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK7CTR-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 HZK7CTR-S-E?
For technical support, including HZK7CTR-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK7CTR-S-E requirements.
6.How does Aetrix verify that HZK7CTR-S-E is sourced from the original manufacturer or authorized distributors?
All HZK7CTR-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 HZK7CTR-S-E meets industry standards.
7.What is the process for return or replacement of HZK7CTR-S-E?
All HZK7CTR-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK7CTR-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 HZK7CTR-S-E part is unused and in its original packaging.
Return procedure for HZK7CTR-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZK7CTR-S-E Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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