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Renesas RD15ES-T4-AZ
- Part No.:
- RD15ES-T4-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD15ES-T4-AZ.pdf
- Description:
- DIODE ZENER
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Inventory:25,000
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Product details
Overview
RD15ES-T4-AZ from Renesas Electronics is a 15 V, ±5% tolerance, 400 mW glass-encapsulated zener diode in DO-34 package with DHD (Double Heatsink Diode) construction, 25 Ω dynamic impedance at 5 mA, and 0.2 µA reverse leakage at 11.5 V, used for precision voltage regulation in power supply feedback loops.
For engineers reviewing the RD15ES-T4-AZ datasheet, RD15ES-T4-AZ pinout, RD15ES-T4-AZ application, or RD15ES-T4-AZ equivalent, this page delivers verified electrical specs, thermal performance data, JEDEC DO-34 mechanical dimensions, and real-world use cases in constant-voltage reference and surge suppression circuits.
Technical Context
The RD15ES-T4-AZ operates as a silicon planar zener diode with sharp knee characteristics and low dynamic impedance, optimized for stable DC voltage clamping under varying load conditions. Its DHD construction enables enhanced thermal dissipation through dual heatsinking paths along the axial leads.
It exhibits a positive temperature coefficient of +8.0 mV/°C at 15 V, enabling predictable drift compensation in multi-diode reference networks. Rated for 175°C junction temperature and 100 W non-repetitive surge power (10 µs pulse), it supports transient overvoltage protection in industrial control inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, ±5% tolerance (14.25–15.75 V), measured at 5 mA test current - ensures tight regulation in feedback divider networks. |
| Dynamic Impedance (ZZ) | 25 Ω max at IZ = 5 mA - minimizes output voltage variation under load transients in shunt regulator designs. |
| Reverse Leakage (IR) | 0.2 µA max at VR = 11.5 V - guarantees low quiescent current in battery-powered voltage reference circuits. |
| Power Dissipation (P) | 400 mW at TA = 25°C - defines maximum continuous DC power handling before thermal derating begins. |
| Surge Power (PRSM) | 100 W for t = 10 µs - enables robust transient suppression without device failure during ESD or inductive kick events. |
| Junction Temperature (Tj) | 175°C maximum - allows operation in high-ambient environments such as enclosed industrial enclosures or near power converters. |
| Package | DO-34 (JEDEC) glass-sealed axial lead - provides hermetic reliability and compatibility with wave-soldering and manual prototyping. |
Pinout & Package
RD15ES-T4-AZ uses a standard two-terminal DO-34 glass package with axial leads. Cathode is marked by a black band on the body. Leads are tinned copper-clad steel, suitable for PCB insertion at 5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode-side reference node in reverse-biased configuration | Connected to lower potential side in zener clamp; forms return path for regulated current flow. |
| Cathode | Zener breakdown terminal / voltage reference node | Marked with black band; connected to higher potential side; provides stable 15 V reference when reverse biased above VZ. |
Key Features
| Feature | Design Value |
|---|---|
| DHD (Double Heatsink Diode) construction | Enables dual thermal conduction paths via axial leads, improving steady-state power handling beyond standard DO-34 limits. |
| Planar process technology | Delivers consistent breakdown voltage distribution and low parameter spread across production lots. |
| E24 standard zener voltage grading | Ensures interoperability with industry-standard resistor and capacitor values in analog reference design. |
| Low knee impedance (ZZK) | 11 Ω max at IZK = 0.5 mA - supports accurate regulation even at very light loads typical in sensor biasing. |
| High surge robustness | Withstands 100 W, 10 µs pulses per Fig. 10 - eliminates need for external TVS in cost-sensitive input protection stages. |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Reference |
|---|---|
Use Scenario: Provides precise 15 V reference for optocoupler-based feedback in isolated AC/DC adapters rated up to 30 W. IC Role / Device Role / Timing Role: Zener voltage reference element in secondary-side regulation loop. Use Value: Maintains ±1% output voltage stability over line/load/temperature due to low ZZ and predictable TC. | Use Scenario: Supplies stable bias voltage to analog pressure sensors in engine control units operating at 125°C ambient. IC Role / Device Role / Timing Role: Precision shunt reference for ratiometric sensor excitation. Use Value: Enables <10 ppm/°C system-level reference drift using its +8.0 mV/°C TC in matched-pair configurations. |
| Telecom Line Surge Protection | Test Equipment Voltage Clamp |
Use Scenario: Clamps induced surges on RS-485 bus lines exposed to lightning-induced transients in outdoor base stations. IC Role / Device Role / Timing Role: Primary shunt protector in series-parallel hybrid protection scheme. Use Value: Absorbs 100 W surges without degradation, extending system MTBF versus polymer PTC-only solutions. | Use Scenario: Limits input voltage to ±15 V in bench multimeter front-end attenuators during overrange events. IC Role / Device Role / Timing Role: Fast-acting voltage limiter protecting precision op-amp inputs. Use Value: Responds within nanoseconds with sub-1 ns turn-on delay, preventing ADC saturation or amplifier latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal, 1 W rating, DO-41 package, 20 Ω ZZ, 5 µA IR at 11.2 V | Higher power but larger footprint; less suitable for space-constrained PCBs with 5 mm pitch constraints | Select when >400 mW continuous dissipation is required and board layout permits DO-41 spacing. |
| BZX55-C15 | 15 V nominal, ±5%, 500 mW, DO-35 package, 30 Ω ZZ, 0.1 µA IR at 11.5 V | Smaller DO-35 body but lower surge rating (40 W); glass seal integrity differs per MIL-STD-202 | Prefer for ultra-low leakage requirements where surge immunity is secondary to standby current. |
Compared with 1N4744A and BZX55-C15, RD15ES-T4-AZ offers optimal balance of DO-34 compactness, 400 mW steady-state power, 100 W surge capability, and 0.2 µA leakage - making it ideal for industrial-grade feedback and protection where board area, thermal margin, and transient resilience are jointly constrained.
Availability
RD15ES-T4-AZ is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom surge protection, and test equipment voltage clamping requiring stable component supply and long-term obsolescence management.
Supply support for RD15ES-T4-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 Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The RD2.0ES–RD39ES series was designed as a family of precision, glass-hermetic zener diodes targeting industrial and communications equipment requiring stable voltage references and reliable transient suppression.
FAQ
What is the exact zener voltage tolerance and test condition for RD15ES-T4-AZ?
The RD15ES-T4-AZ has a nominal zener voltage of 15 V with a tolerance of ±5% (14.25–15.75 V), specified at a test current of 5 mA and ambient temperature of 25°C. This tolerance is guaranteed per the E24 standard and confirmed in the Electrical Characteristics table of Renesas document D13935EJ7V0DS.
Does RD15ES-T4-AZ support high-temperature operation, and what is its maximum junction temperature?
Yes, RD15ES-T4-AZ supports operation up to a maximum junction temperature of 175°C, as stated in the Absolute Maximum Ratings table. Its DO-34 glass package and DHD construction enable reliable thermal performance in industrial environments where ambient temperatures exceed 85°C.
What is the surge power rating of RD15ES-T4-AZ, and how is it defined?
The RD15ES-T4-AZ is rated for 100 W non-repetitive surge reverse power at a pulse width of 10 µs, per Figure 10 in the datasheet. This rating reflects single-event transient energy absorption capability and is validated under standardized test conditions without device degradation.
How does the dynamic impedance of RD15ES-T4-AZ affect its performance in voltage regulation circuits?
The RD15ES-T4-AZ has a maximum dynamic impedance of 25 Ω at 5 mA, which directly determines output voltage variation under changing load current. In shunt regulator designs, this low ZZ ensures minimal deviation (<125 mV) for ±5 mA load shifts, preserving regulation accuracy in feedback loops.
Is RD15ES-T4-AZ RoHS compliant, and what is its environmental status?
RD15ES-T4-AZ meets RoHS Directive requirements as confirmed by Renesas Electronics' compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is suitable for environmentally regulated industrial and consumer applications.
RD15ES-T4-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:
- -
RD15ES-T4-AZ FAQ
1.How can I place an order for RD15ES-T4-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD15ES-T4-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 RD15ES-T4-AZ reliable?
The price and inventory of RD15ES-T4-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD15ES-T4-AZ is usually 5 days.
3.What payment methods are accepted for RD15ES-T4-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD15ES-T4-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD15ES-T4-AZ?
RD15ES-T4-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD15ES-T4-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 RD15ES-T4-AZ?
For technical support, including RD15ES-T4-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD15ES-T4-AZ requirements.
6.How does Aetrix verify that RD15ES-T4-AZ is sourced from the original manufacturer or authorized distributors?
All RD15ES-T4-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 RD15ES-T4-AZ meets industry standards.
7.What is the process for return or replacement of RD15ES-T4-AZ?
All RD15ES-T4-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD15ES-T4-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 RD15ES-T4-AZ part is unused and in its original packaging.
Return procedure for RD15ES-T4-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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