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Renesas RD36ES-AZ
- Part No.:
- RD36ES-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD36ES-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:19,320
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Product details
Overview
RD36ES-AZ from Renesas Electronics is a 36 V, ±5% tolerance zener diode in DO-34 glass package with 400 mW power dissipation, DHD (Double Heatsink Diode) construction, and 0.5 µA reverse current at 27 V, used for precision voltage regulation in low-power analog reference circuits.
For engineers reviewing the RD36ES-AZ datasheet, RD36ES-AZ pinout, RD36ES-AZ application, or RD36ES-AZ equivalent, this page provides verified electrical specs, thermal behavior, zener voltage stability across temperature, surge handling capability, and direct alternative options for constant-voltage and overvoltage protection designs.
Technical Context
This planar-processed zener diode operates in reverse breakdown with a nominal zener voltage of 36 V at 5 mA test current, dynamic impedance of 75 Ω max at 5 mA, and knee impedance of 250 Ω max at 0.5 mA. Its DHD construction enables enhanced thermal dissipation from both ends of the DO-34 lead frame.
The device exhibits a positive zener voltage temperature coefficient of +0.08 %/°C (typical), confirmed by Fig. 9 in D13935EJ7V0DS, and supports non-repetitive surge reverse power up to 100 W for 10 µs pulses per Fig. 10 - critical for transient suppression in sensor signal conditioning paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.68–35.77 V at IZ = 5 mA - defines stable regulation point for mid-range analog references |
| Power Dissipation (P) | 400 mW at TA = 25°C - sets maximum continuous DC power in PCB-mounted operation |
| Dynamic Impedance (ZZ) | 75 Ω max at IZ = 5 mA - determines output voltage variation under load current changes |
| Reverse Current (IR) | 0.2 µA max at VR = 27 V - ensures minimal leakage in high-impedance bias networks |
| Surge Reverse Power (PRSM) | 100 W for t = 10 µs - enables clamping of fast ESD or inductive spikes without failure |
| Junction Temperature (Tj) | 175°C max - allows operation in thermally constrained industrial enclosures |
| Package | DO-34 (JEDEC) - 2.4 mm max body length, 5 mm lead pitch, glass-sealed, axial leads |
Pinout & Package
DO-34 package: axial-leaded, glass-encapsulated diode with cathode indicated by black band. Leads are unmarked; polarity is defined solely by cathode marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail when used as shunt regulator |
| Cathode | Zener breakdown terminal / Voltage reference output | Provides stable 36 V reference when reverse-biased; marked with black band on package |
Key Features
| Feature | Design Value |
|---|---|
| DHD (Double Heatsink Diode) construction | Thermal resistance reduced via dual-path heat conduction through both axial leads - improves power handling at elevated ambient temperatures |
| Planar process technology | Enables tight VZ tolerance (±3% for AB2 suffix variants) and repeatable knee characteristics for predictable low-current regulation |
| E24 standard zener voltage grading | Supports standardized 36 V selection within common resistor/diode value series - simplifies BOM rationalization |
| DO-34 glass package | Allows 5 mm PCB pitch insertion and withstands reflow-compatible pre-tinning - suitable for wave-soldered industrial control boards |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Analog Reference Supply |
|---|---|
Use Scenario: Stabilizing excitation voltage for 4–20 mA current-loop pressure transmitters operating in 0–85°C ambient environments. IC Role / Device Role / Timing Role: Shunt zener reference providing fixed 36 V bias to op-amp-based current source circuitry. Use Value: Maintains <±1% output accuracy over temperature due to low ZZ and controlled γZ, eliminating need for active voltage references. |
Use Scenario: Generating precise 36 V reference for 16-bit ADC front-end in portable data loggers powered by Li-ion batteries. IC Role / Device Role / Timing Role: Passive voltage clamp and regulation element in low-quiescent LDO pre-regulator stage. Use Value: Delivers 0.2 µA max leakage at 27 V, preserving battery life while enabling accurate full-scale ADC conversion. |
| Overvoltage Protection Clamp | Waveform Clipping Circuit |
Use Scenario: Protecting microcontroller GPIO pins from 48 V supply rail transients in building automation controllers. IC Role / Device Role / Timing Role: Fast-acting shunt clamp triggered during >36 V excursions, diverting surge energy to ground. Use Value: Withstands 100 W/10 µs surges (Fig. 10) without parametric shift - eliminates need for TVS diodes in cost-sensitive designs. |
Use Scenario: Limiting audio signal peaks in analog microphone preamplifier stages to prevent op-amp saturation. IC Role / Device Role / Timing Role: Bidirectional clipping element (with series diode) shaping AC waveform amplitude to ±36 V envelope. Use Value: Sharp knee impedance (250 Ω max at 0.5 mA) ensures clean clipping threshold with minimal distortion near VZ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4738A (ON Semiconductor) | 33 V nominal, 1 W rating, DO-41 package, 10 Ω ZZ @ 76 mA - higher power but coarser tolerance (±5%) and different thermal profile | Requires PCB layout change (longer DO-41 body); suited for higher-current regulation where 400 mW is insufficient | Select when >500 mW continuous dissipation is required and DO-41 footprint is acceptable |
| BZX55-C36 (Vishay) | 36 V nominal, 500 mW rating, DO-35 package, 80 Ω ZZ @ 5 mA - same VZ grade but higher PD and smaller DO-35 body (1.8 mm diameter) | Smaller footprint enables dense layouts; slightly higher ZZ impacts low-current regulation precision | Select when board space is constrained and 500 mW margin is needed without changing schematic topology |
Compared with 1N4738A and BZX55-C36, RD36ES-AZ offers superior thermal management via DHD construction in DO-34, tighter VZ consistency across production lots, and proven reliability in long-life industrial deployments - making it preferred for fixed-voltage references where stability and legacy compatibility matter more than raw power rating.
Availability
RD36ES-AZ is available at Aetrix Electronics and suitable for industrial sensor interfaces, analog reference supplies, overvoltage protection clamps, and waveform clipping circuits requiring stable component supply and long-term obsolescence support.
Supply support for RD36ES-AZ 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 delivering microcontrollers, analog power, and timing solutions for industrial, automotive, and infrastructure markets.
RD36ES-AZ belongs to the legacy NEC RD-series zener diode family, designed specifically for high-stability, low-power voltage reference and protection functions in cost-sensitive, thermally demanding industrial equipment.
FAQ
What is the exact zener voltage range for RD36ES-AZ at 5 mA test current?
The RD36ES-AZ has a guaranteed zener voltage range of 34.68 V to 35.77 V when measured at IZ = 5 mA and TA = 25°C, per the AB2 suffix row in the Electrical Characteristics table of datasheet D13935EJ7V0DS. This corresponds to ±3% tolerance around the nominal 36 V rating.
Does RD36ES-AZ support surface-mount assembly or only through-hole mounting?
RD36ES-AZ uses a DO-34 axial-leaded glass package and is designed exclusively for through-hole mounting. It is not compatible with SMT reflow processes. The 2.4 mm max body length and 5 mm lead pitch enable compact wave-soldered layouts but require plated-through holes and lead forming prior to soldering.
What is the maximum allowable reverse voltage before breakdown for RD36ES-AZ?
The RD36ES-AZ begins controlled zener breakdown at approximately 34.68 V (minimum VZ). Its absolute maximum non-breakdown reverse voltage is not specified separately - operation above VZ is intentional and normal. However, reverse voltage must remain below the surge limit (27 V for IR specification) to avoid excessive leakage; sustained reverse bias >36 V must be current-limited to stay within 400 mW PD.
How does the DHD construction improve thermal performance of RD36ES-AZ?
The DHD (Double Heatsink Diode) construction in RD36ES-AZ allows heat generated at the junction to conduct simultaneously through both axial leads into the PCB copper, reducing effective thermal resistance. As shown in Fig. 7 of D13935EJ7V0DS, this yields ~20% lower Rth compared to standard DO-34 diodes of identical size - directly extending safe operating area at elevated ambient temperatures.
Is RD36ES-AZ compliant with RoHS and lead-free soldering requirements?
RD36ES-AZ was originally released prior to RoHS enforcement (2003 datasheet), and its DO-34 glass package contains leaded solder seals. It is not RoHS-compliant. For new designs requiring lead-free compliance, Renesas recommends evaluating modern alternatives such as the RLZ36B or equivalent qualified zeners - RD36ES-AZ remains available for legacy repair and continuity programs only.
RD36ES-AZ 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:
- -
RD36ES-AZ FAQ
1.How can I place an order for RD36ES-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD36ES-AZ 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 RD36ES-AZ reliable?
The price and inventory of RD36ES-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD36ES-AZ is usually 5 days.
3.What payment methods are accepted for RD36ES-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD36ES-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD36ES-AZ?
RD36ES-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD36ES-AZ 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 RD36ES-AZ?
For technical support, including RD36ES-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD36ES-AZ requirements.
6.How does Aetrix verify that RD36ES-AZ is sourced from the original manufacturer or authorized distributors?
All RD36ES-AZ 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 RD36ES-AZ meets industry standards.
7.What is the process for return or replacement of RD36ES-AZ?
All RD36ES-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD36ES-AZ, 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 RD36ES-AZ part is unused and in its original packaging.
Return procedure for RD36ES-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD36ES-AZ Tags
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