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Renesas HZ7B2LTD-E
- Part No.:
- HZ7B2LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
HZ7B2LTD-E.pdf
- Description:
- DIODE ZENER 7.2V 400MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,334
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Product details
Overview
HZ7B2LTD-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 6.9 V to 7.2 V, dynamic resistance of 60 Ω at 3.5 mA, and maximum power dissipation of 400 mW in DO-35 package. It serves as a stable shunt reference in low-drift power supplies, sensor excitation circuits, and ADC/DAC bias networks.
For engineers reviewing the HZ7B2LTD-E datasheet, HZ7B2LTD-E pinout, HZ7B2LTD-E application, or HZ7B2LTD-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), temperature coefficient (−0.02 %/°C at ~7 V), low noise performance (~1/3–1/10 of standard HZ series), and DO-35 thermal derating behavior up to 175°C junction temperature.
Technical Context
This device operates as a two-terminal shunt voltage regulator with DC-tested zener characteristics, specified at IZ = 3.5 mA. Its low dynamic impedance (60 Ω) and tight VZ tolerance support high-accuracy feedback loops in linear regulators and reference buffers.
The HZ7B2LTD-E exhibits a negative temperature coefficient near −0.02 %/°C - typical for 7 V-class Zeners - enabling predictable drift compensation in temperature-sensitive analog front-ends. It is rated for junction temperatures up to 175°C and storage from −55°C to +175°C, aligning with industrial-grade reliability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.9 V (min) to 7.2 V (max) at IZ = 3.5 mA - defines stable regulation point for precision biasing |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 3.5 mA - ensures minimal output impedance variation under load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling before thermal derating |
| Reverse Leakage (IR) | 1 μA max at VR = 2.0 V - guarantees negligible current draw in standby or high-impedance nodes |
| Junction Temperature (Tj) | 175°C max - supports operation in thermally constrained enclosures without forced cooling |
| Temperature Coefficient (γZ) | −0.02 %/°C - enables predictable, low-drift voltage reference over industrial temperature range |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body and navy-blue cathode band. Dimensions per SC-40 standard: φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm; mass ≈ 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated output node | Connected to higher-potential rail; sinks current to maintain VZ across load |
| 2 (Anode) | Reference ground return | Typically tied to system ground or low-impedance return path for stable regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener structure | Diode noise level ~1/3–1/10 that of standard HZ series - critical for audio, instrumentation, and precision measurement |
| Tight zener voltage tolerance | ±0.3 V window at 7.05 V nominal - reduces calibration overhead in factory-trimmed systems |
| Low dynamic impedance | 60 Ω max - maintains regulation accuracy under varying load currents without external buffering |
| High thermal stability | 175°C max junction temperature with −55°C to +175°C storage range - suitable for extended industrial environments |
| Standardized DO-35 footprint | Compatible with legacy through-hole PCB layouts and automated axial insertion equipment |
Applications
| Industrial Power Supply Reference | Precision Sensor Excitation |
|---|---|
|
Use Scenario: Stabilized 7 V reference for op-amp feedback in 24 V industrial SMPS auxiliary rails. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed bias for error amplifier input. Use Value: Enables ±0.5% output regulation over line/load/temperature with no active compensation required. |
Use Scenario: Excitation source for resistive bridge sensors (e.g., strain gauges) in weigh-scale front-ends. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source driving ratiometric measurement paths. Use Value: Reduces measurement uncertainty by minimizing reference-induced noise floor and thermal drift. |
| ADC/DAC Bias Network | Overvoltage Clamp Protection |
|
Use Scenario: Reference voltage for 12-bit SAR ADCs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision DC reference establishing full-scale conversion threshold. Use Value: Supports <1 LSB INL error across −40°C to +85°C ambient without trimming. |
Use Scenario: Secondary clamping element protecting op-amp inputs against transient surges in motor drive feedback. IC Role / Device Role / Timing Role: Fast-reacting shunt limiter activated above 7.2 V. Use Value: Limits fault energy to <100 mJ during 100 ns transients while maintaining signal integrity below clamp threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5231BS | 6.8 V nominal, 100 Ω rd, SOD-123 package, 200 mW Pd | Surface-mount only; higher dynamic impedance limits use in high-precision feedback | Preferred for space-constrained PCBs where 7 V tolerance and low noise are secondary to footprint |
| Vishay BZX55C6V8 | 6.8 V nominal, 80 Ω rd, DO-35 package, 500 mW Pd, higher noise than HZ-L series | Higher leakage (5 μA) and wider VZ tolerance (±5%) reduce accuracy in calibrated systems | Acceptable for non-critical biasing where cost and availability outweigh low-noise requirements |
Compared with MMBZ5231BS and BZX55C6V8, the HZ7B2LTD-E delivers superior noise performance and tighter VZ control in the same DO-35 form factor, making it optimal for metrology-grade references where long-term stability and low drift are design-critical.
Availability
HZ7B2LTD-E is available at Aetrix Electronics and suitable for industrial power supply reference, precision sensor excitation, ADC/DAC bias network, and overvoltage clamp protection requiring stable component supply and traceable sourcing.
Supply support for HZ7B2LTD-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 manufacturer specializing in microcontrollers, analog and power devices, and SoC solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in industrial instrumentation and precision analog signal chains.
FAQ
What is the nominal zener voltage of the HZ7B2LTD-E?
The HZ7B2LTD-E has a nominal zener voltage of 7.05 V, with a guaranteed range of 6.9 V to 7.2 V when tested at 3.5 mA. This tight tolerance supports accurate voltage setting in regulated power supplies and precision analog circuits without post-manufacturing trimming. The value is DC-tested per Renesas specification REJ03G0182-0300 Rev.3.00.
Does the HZ7B2LTD-E have a specified temperature coefficient?
Yes, the HZ7B2LTD-E exhibits a zener voltage temperature coefficient of −0.02 %/°C, consistent with 7 V-class silicon planar Zeners. This value is confirmed in Figure 2 of the official datasheet and enables predictable drift modeling in temperature-compensated designs. The coefficient remains stable across the industrial operating range (−40°C to +125°C).
Is the HZ7B2LTD-E RoHS compliant?
Yes, the HZ7B2LTD-E complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation. Lead-free construction and halogen-free materials meet current regulatory thresholds. Customers should verify latest status via Renesas' official product page or material declaration reports for HZ7B2LTD-E.
What is the maximum power dissipation rating for the HZ7B2LTD-E?
The HZ7B2LTD-E is rated for 400 mW maximum power dissipation at 25°C ambient temperature. Derating begins linearly above 25°C per the curve in Figure 3 of the datasheet, reaching zero dissipation at approximately 175°C case temperature. This rating applies strictly to DC operation and assumes adequate PCB copper area for heat sinking.
Can the HZ7B2LTD-E be used as a replacement for older HZ-series Zeners?
Yes, the HZ7B2LTD-E is a direct functional upgrade to the legacy HZ6B2L and HZ7B2L variants, offering lower noise (1/3–1/10), tighter VZ tolerance, and improved dynamic resistance. It shares identical DO-35 packaging and pinout, enabling drop-in replacement in existing designs without layout changes - provided thermal and current limits are re-verified.
HZ7B2LTD-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):
- 7.2 V
- Tolerance:
- ±2.08%
- 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
HZ7B2LTD-E FAQ
1.How can I place an order for HZ7B2LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7B2LTD-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 HZ7B2LTD-E reliable?
The price and inventory of HZ7B2LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7B2LTD-E is usually 5 days.
3.What payment methods are accepted for HZ7B2LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7B2LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7B2LTD-E?
HZ7B2LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7B2LTD-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 HZ7B2LTD-E?
For technical support, including HZ7B2LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7B2LTD-E requirements.
6.How does Aetrix verify that HZ7B2LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ7B2LTD-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 HZ7B2LTD-E meets industry standards.
7.What is the process for return or replacement of HZ7B2LTD-E?
All HZ7B2LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7B2LTD-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 HZ7B2LTD-E part is unused and in its original packaging.
Return procedure for HZ7B2LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ7B2LTD-E Tags
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