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Renesas HZS36NB3TD-E
- Part No.:
- HZS36NB3TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS36NB3TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
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Inventory:4,285
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Product details
Overview
HZS36NB3TD-E from ROHM Semiconductor is a silicon epitaxial planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 36.4 V to 38.0 V at 2 mA test current, dynamic resistance ≤140 Ω, maximum power dissipation of 400 mW, and junction temperature rating up to 200°C. It is used in industrial DC-DC converter feedback loops and low-power reference circuits.
For engineers reviewing the HZS36NB3TD-E datasheet, HZS36NB3TD-E pinout, HZS36NB3TD-E application, or HZS36NB3TD-E equivalent, key selection criteria include zener voltage tolerance (±2.8% at 36.4–38.0 V), low leakage (<1 µA at VR = 27 V), thermal coefficient behavior near 36 V, and compatibility with 5 mm-pitch automated insertion equipment.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with DC-tested characteristics. Its epitaxial planar construction ensures stable zener impedance and low leakage across temperature extremes, supporting reliable regulation in unregulated input environments.
The device exhibits a positive temperature coefficient above ~5.6 V, with measured γZ ≈ +0.06 %/°C near 36 V (per Fig.2), and derates linearly from 400 mW at 25°C to zero at 180°C ambient (per Fig.3), requiring thermal-aware PCB layout on phenolic board with 5 mm lead pitch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36.4 V to 38.0 V at IZ = 2 mA - defines regulated output voltage range in shunt regulator designs |
| Dynamic Resistance (rd) | ≤140 Ω at IZ = 2 mA - determines load regulation sensitivity and ripple rejection capability |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous power handling before thermal shutdown |
| Reverse Leakage (IR) | <1 µA at VR = 27 V - ensures minimal quiescent current in standby or low-IOUT conditions |
| Junction Temperature (Tj) | −55°C to +200°C - enables operation in high-ambient industrial enclosures without forced cooling |
| Package Type | DO-35 glass axial - supports wave soldering and 5 mm-pitch auto-insertion per ADE-208-120A(Z) |
Pinout & Package
DO-35 glass axial package with cathode band marking; leads are tinned copper-clad steel, 0.45 mm diameter, 25 mm length, 5 mm pitch standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-bias anode-to-cathode voltage establishes VZ |
| 2 (Non-banded End) | Anode | Connected to ground or common return; completes shunt path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | rd ≤140 Ω ensures <10 mV output shift per 1 mA load change in feedback networks |
| Stable voltage grade B3 | 36.4–38.0 V tolerance (±2.8%) enables tight-setpoint regulation without post-calibration |
| High-temperature operation | Rated to +200°C junction allows use in sealed power modules without heatsinking |
| Automated assembly support | 5 mm lead pitch and DO-35 outline comply with JIS C 5021 and JEDEC DO-35 standards |
Applications
| Industrial Power Supply Feedback | Low-Power Reference Source |
|---|---|
Use Scenario: Shunt regulation in isolated flyback auxiliary winding feedback circuit. IC Role / Device Role / Timing Role: Zener reference for TL431-like comparator biasing in secondary-side sensing. Use Value: Maintains ±1.5% output accuracy over −40°C to +105°C ambient due to predictable γZ and low rd. | Use Scenario: Precision voltage reference for microcontroller ADC calibration. IC Role / Device Role / Timing Role: Stable 36.4–38.0 V reference feeding resistive divider to generate 3.3 V or 5 V sub-reference. Use Value: Delivers <1 µA leakage at 27 V, minimizing error contribution in high-impedance divider networks. |
| DC-DC Converter Overvoltage Clamp | Legacy Equipment Voltage Stabilization |
Use Scenario: Overvoltage protection clamp on 36 V rail in telecom line card. IC Role / Device Role / Timing Role: Fast-acting shunt limiter triggered when transient exceeds 38 V. Use Value: Responds within nanoseconds to transients due to low junction capacitance (<2 pF) and 400 mW surge capability. | Use Scenario: Replacement zener in aging industrial PLC power section. IC Role / Device Role / Timing Role: Direct drop-in substitute for obsolete 36 V Zeners in analog signal conditioning stages. Use Value: Matches legacy DO-35 mechanical fit and electrical specs (VZ, rd, Pd) per ADE-208-120A(Z) Rev 1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | VZ = 24 V (nominal), rd = 14 Ω, Pd = 1 W - lower voltage, higher power, different grade tolerance | Not suitable for 36 V regulation; requires redesign of resistor network and thermal layout | Select only if system target is 24 V and higher power margin is needed |
| BZX55-C36 | VZ = 36 V (nominal), rd = 100 Ω, Pd = 500 mW - tighter nominal VZ but wider min/max (34.2–37.8 V), DO-35 compatible | Acceptable for non-critical 36 V references where ±5% tolerance is acceptable | Prefer for cost-sensitive designs where 36 V nominal suffices and 500 mW headroom is beneficial |
Compared with HZS36NB3TD-E, 1N4749A serves lower-voltage systems and lacks matching VZ range, while BZX55-C36 offers higher power but looser voltage grading - HZS36NB3TD-E uniquely delivers 36.4–38.0 V with guaranteed low rd and industrial-grade thermal margin.
Availability
HZS36NB3TD-E is available at Aetrix Electronics and suitable for industrial power supply feedback, low-power reference sources, DC-DC converter overvoltage clamping, and legacy equipment voltage stabilization requiring stable component supply and long-term lifecycle assurance.
Supply support for HZS36NB3TD-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
ROHM Semiconductor is a Japanese semiconductor manufacturer specializing in analog, power, and sensor solutions for automotive, industrial, and consumer markets.
The HZS Series is part of ROHM's discrete Zener diode portfolio, engineered for high-reliability voltage stabilization in space-constrained, thermally demanding power supply applications.
FAQ
What is the exact zener voltage range for HZS36NB3TD-E?
HZS36NB3TD-E has a guaranteed zener voltage range of 36.4 V to 38.0 V when tested at IZ = 2 mA and Ta = 25°C, corresponding to Grade B3 per the HZS Series datasheet ADE-208-120A(Z) Rev 1. This 1.6 V span reflects ±2.8% tolerance around the nominal 37.2 V center point, and remains stable under DC bias conditions.
Is HZS36NB3TD-E suitable for surface-mount assembly?
No, HZS36NB3TD-E uses a DO-35 glass axial package with radial leads intended for through-hole mounting and 5 mm-pitch automatic insertion. It is not compatible with reflow or wave soldering processes designed for SMD packages like SOD-123 or SMA. For SMT alternatives, consider ROHM's UDZS series, not HZS36NB3TD-E.
What is the maximum reverse leakage current specification for HZS36NB3TD-E?
HZS36NB3TD-E specifies reverse leakage current IR < 1 µA at VR = 27 V and Ta = 25°C. This low leakage supports high-impedance reference divider designs and minimizes standby power loss in battery-backed or energy-sensitive applications using HZS36NB3TD-E.
Does HZS36NB3TD-E have a specified temperature coefficient?
Yes - per Figure 2 in the HZS Series datasheet, HZS36NB3TD-E (as part of the HZS36 family) exhibits a zener voltage temperature coefficient γZ of approximately +0.06 %/°C (or +22 mV/°C) near 36 V. This positive coefficient must be accounted for in wide-temperature-range regulation circuits using HZS36NB3TD-E.
Can HZS36NB3TD-E replace older 36 V Zener diodes in legacy designs?
Yes - HZS36NB3TD-E matches the DO-35 package, 5 mm lead pitch, and electrical performance (VZ, rd, Pd) of many legacy 36 V Zeners. Its guaranteed 36.4–38.0 V range and 200°C junction rating make it a robust upgrade for aging industrial equipment where HZS36NB3TD-E replaces obsolete parts without PCB modification.
HZS36NB3TD-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:
- -
HZS36NB3TD-E FAQ
1.How can I place an order for HZS36NB3TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS36NB3TD-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 HZS36NB3TD-E reliable?
The price and inventory of HZS36NB3TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS36NB3TD-E is usually 5 days.
3.What payment methods are accepted for HZS36NB3TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS36NB3TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS36NB3TD-E?
HZS36NB3TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS36NB3TD-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 HZS36NB3TD-E?
For technical support, including HZS36NB3TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS36NB3TD-E requirements.
6.How does Aetrix verify that HZS36NB3TD-E is sourced from the original manufacturer or authorized distributors?
All HZS36NB3TD-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 HZS36NB3TD-E meets industry standards.
7.What is the process for return or replacement of HZS36NB3TD-E?
All HZS36NB3TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS36NB3TD-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 HZS36NB3TD-E part is unused and in its original packaging.
Return procedure for HZS36NB3TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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