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Renesas HZ7B1LTD-E
- Part No.:
- HZ7B1LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
HZ7B1LTD-E.pdf
- Description:
- DIODE ZENER 7.1V 400MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZ7B1LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 6.7–7.0 V, dynamic resistance of 60 Ω at 3.5 mA, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C - deployed in industrial power supply regulation and sensor signal conditioning.
For engineers reviewing the HZ7B1LTD-E datasheet, HZ7B1LTD-E pinout, HZ7B1LTD-E application, or HZ7B1LTD-E equivalent, this part serves as a low-noise, low-impedance voltage reference where thermal stability (−0.04 to −0.06 %/°C), tight zener voltage tolerance, and DO-35 package compatibility with legacy through-hole PCB layouts are critical selection criteria.
Technical Context
The HZ7B1LTD-E operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents via controlled reverse-bias breakdown. Its low dynamic resistance (60 Ω) and reduced noise level (≈1/3–1/10 of standard HZ series) stem from optimized silicon planar process and low-leakage junction design.
It exhibits negative temperature coefficient behavior (−0.04 to −0.06 %/°C), making it suitable for temperature-compensated references when paired with positive-TC components. Absolute maximum ratings include 400 mW power dissipation at 25°C ambient and 175°C junction temperature limit, with derating above 25°C per Fig.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.7–7.0 V at IZ = 0.5 mA - defines precise regulation point for feedback networks in linear regulators or ADC references. |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 3.5 mA - ensures minimal output voltage variation under load transients, critical for high-PSRR analog stages. |
| Reverse Current (IR) | 1 μA max at VR = 2.0 V - guarantees negligible leakage error in high-impedance biasing or reference divider applications. |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports robust operation in compact industrial modules without forced cooling. |
| Junction Temperature (Tj) | −55 to +175°C - enables deployment in extended-temperature environments such as factory automation controllers and motor drive feedback circuits. |
| Temperature Coefficient (γZ) | −0.04 to −0.06 %/°C - allows predictable drift compensation in multi-component reference designs. |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body and navy-blue cathode band; compatible with standard through-hole mounting and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-bias anode connection point | Connected to higher-potential node in shunt configuration; polarity marking essential to prevent forward conduction failure. |
| 2 (Anode) | Reverse-bias cathode return path | Typically tied to circuit ground or low-side reference; establishes current path for zener regulation loop. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise ≈1/3–1/10 that of standard HZ series - directly improves SNR in precision instrumentation amplifiers and voltage-controlled oscillators. |
| Tight zener voltage tolerance | ±0.15 V window (6.7–7.0 V) at 0.5 mA - reduces calibration overhead in factory-trimmed analog front-ends. |
| Low dynamic impedance | 60 Ω max at 3.5 mA - maintains regulation accuracy under ±10% load current variation in unregulated DC-DC post-filtering. |
| High thermal endurance | 175°C max junction temperature - supports reliability in enclosed industrial enclosures without heatsinking. |
| DO-35 mechanical compatibility | Standard SC-40 footprint (2.0 mm diameter × 26 mm length) - enables drop-in replacement for legacy zener designs without PCB redesign. |
Applications
| Industrial Power Supply Regulation | Precision Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing reference voltage for op-amp-based current-sense amplifiers in motor drive inverters. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 6.85 V bias for gain-setting resistors and offset trimming. Use Value: Low dynamic resistance (60 Ω) minimizes output drift during PWM switching noise coupling, improving current measurement accuracy by ≤0.5%. |
Use Scenario: Biasing bridge sensors (e.g., strain gauges) in weigh-scale transducers operating at 25–70°C ambient. IC Role / Device Role / Timing Role: Low-noise zener reference establishing excitation voltage for Wheatstone bridge networks. Use Value: Reduced diode noise enables sub-10 μV RMS output ripple, supporting 16-bit ADC resolution without additional filtering. |
| Medical Diagnostic Instrumentation | Test & Measurement Equipment |
Use Scenario: Providing regulated excitation for photodiode biasing in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) zener reference ensuring stable reverse-bias voltage across wide temperature range. Use Value: Tight VZ tolerance (±0.15 V) eliminates need for per-unit trimming, reducing manufacturing test time by 12 seconds/unit. |
Use Scenario: Generating calibrated reference voltages in handheld multimeters with auto-ranging capability. IC Role / Device Role / Timing Role: Primary shunt reference in dual-slope integrator reference chain requiring long-term stability. Use Value: −0.05 %/°C tempco enables <±0.02% reading error over 0–50°C operating range without active compensation. |
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 |
|---|---|---|---|
| 1N4734A (ON Semiconductor) | Zener voltage 5.6 V, rd = 9 Ω, Pd = 1 W, DO-41 package | Higher power but fixed 5.6 V rating; unsuitable for 6.8 V systems requiring tighter tolerance | Select only if system requires ≥1 W dissipation and can accommodate 5.6 V reference with external scaling. |
| BZX55C6V8 (Vishay) | Zener voltage 6.8 V ±5%, rd = 35 Ω, Pd = 500 mW, DO-35 package | Lower dynamic resistance but wider VZ tolerance (±5% vs. ±0.15 V); higher leakage (≤5 μA) | Acceptable for cost-sensitive general-purpose regulation, but not for low-noise or high-accuracy analog references. |
Compared with 1N4734A and BZX55C6V8, the HZ7B1LTD-E delivers superior noise performance and tighter voltage tolerance in a DO-35 package, making it optimal for precision analog signal chains where regulation stability and spectral purity outweigh raw power handling.
Availability
HZ7B1LTD-E is available at Aetrix Electronics and suitable for industrial power supply regulation, precision sensor signal conditioning, medical diagnostic instrumentation, and test & measurement equipment requiring stable component supply with full traceability and lifecycle continuity.
Supply support for HZ7B1LTD-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 connectivity solutions for industrial, automotive, and enterprise applications.
The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in industrial and test equipment, emphasizing reduced diode noise, tight voltage tolerance, and robust thermal performance.
FAQ
What is the exact zener voltage range for HZ7B1LTD-E at 0.5 mA test current?
The HZ7B1LTD-E has a specified zener voltage range of 6.7 V minimum to 7.0 V maximum when tested at IZ = 0.5 mA, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This tight 0.3 V window supports high-accuracy voltage referencing without post-production trimming, and the value is measured using DC test conditions as noted in the Electrical Characteristics table on page 2.
Does HZ7B1LTD-E have a documented temperature coefficient, and how does it affect circuit design?
Yes, the HZ7B1LTD-E exhibits a negative temperature coefficient of −0.04 to −0.06 %/°C, as shown in Figure 2 of the datasheet. This means its zener voltage decreases slightly with rising temperature - a key factor when designing temperature-compensated references. Engineers commonly pair it with positive-TC components (e.g., forward-biased diodes) to achieve near-zero net drift over industrial temperature ranges.
Can HZ7B1LTD-E be used as a direct replacement for older HZ7B1L parts?
Yes, HZ7B1LTD-E is a Renesas-qualified revision of the HZ7B1L Zener diode, sharing identical electrical specifications, DO-35 package dimensions, pinout, and thermal ratings. The "TD-E" suffix denotes updated traceability and quality control per Renesas' post-merger documentation standards, with no functional or performance deviation from the original HZ7B1L.
What is the maximum allowable power dissipation for HZ7B1LTD-E at 70°C ambient temperature?
Per Figure 3 (Power Dissipation vs. Ambient Temperature) in the datasheet, the HZ7B1LTD-E's allowable power dissipation linearly derates from 400 mW at 25°C to approximately 280 mW at 70°C ambient. This derating follows a slope of −4.0 mW/°C beyond 25°C, ensuring safe operation within junction temperature limits up to 175°C without forced cooling.
Is HZ7B1LTD-E compliant with RoHS and halogen-free requirements?
Yes, HZ7B1LTD-E meets EU RoHS Directive requirements, as confirmed by Renesas' environmental compliance statements referenced in Note 10 of the datasheet. It is manufactured without lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), and Renesas provides material declarations upon request for full supply chain traceability.
HZ7B1LTD-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.1 V
- Tolerance:
- ±2.11%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 3.5 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
HZ7B1LTD-E FAQ
1.How can I place an order for HZ7B1LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7B1LTD-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 HZ7B1LTD-E reliable?
The price and inventory of HZ7B1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7B1LTD-E is usually 5 days.
3.What payment methods are accepted for HZ7B1LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7B1LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7B1LTD-E?
HZ7B1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7B1LTD-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 HZ7B1LTD-E?
For technical support, including HZ7B1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7B1LTD-E requirements.
6.How does Aetrix verify that HZ7B1LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ7B1LTD-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 HZ7B1LTD-E meets industry standards.
7.What is the process for return or replacement of HZ7B1LTD-E?
All HZ7B1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7B1LTD-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 HZ7B1LTD-E part is unused and in its original packaging.
Return procedure for HZ7B1LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ7B1LTD-E Tags
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