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Renesas RD15F
- Part No.:
- RD15F
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD15F.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:10,379
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Product details
Overview
RD15F from Renesas Electronics is a 1 W planar-type silicon Zener diode with a nominal zener voltage of 15 V (B3 grade: 14.52–15.26 V), dynamic impedance of 10 Ω at 20 mA, and temperature coefficient of +11 mV/°C - designed for precision voltage regulation and surge absorption in power supply rails and reference circuits.
For engineers reviewing the RD15F datasheet, RD15F pinout, RD15F application, or RD15F equivalent, this device is evaluated for constant-voltage clamping, waveform limiting, and overvoltage protection where stable 15 V reference and low-impedance regulation under 20 mA bias are required.
Technical Context
The RD15F operates as a two-terminal voltage-reference device with a glass-sealed DO-41 package and planar DHD (Double Heatsink Diode) structure enabling 1 W continuous power dissipation at 25°C ambient. Its zener voltage is specified under 40 ms test pulse conditions per JEDEC standards.
It exhibits a positive temperature coefficient (+11 mV/°C typical at 20 mA), indicating increasing Vz with rising junction temperature - a key consideration in thermal design for voltage-stable references across operating ranges up to 175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 14.52–15.26 V (B3 grade, tested at 20 mA) - defines tight regulation window for 15 V reference designs |
| Power Dissipation (P) | 1.0 W at TA = 25°C - sets maximum continuous DC power handling before thermal derating |
| Dynamic Impedance (Zz) | 10 Ω max at IZ = 20 mA - ensures low AC impedance for stable regulation under varying load |
| Reverse Current (IR) | 10 μA max at VR = 12 V - confirms low leakage below breakdown, critical for standby power integrity |
| Temp. Coefficient (γZ) | +11 mV/°C typical at 20 mA - quantifies Vz drift with temperature; requires thermal compensation in precision apps |
| Junction Temperature (Tj) | −65 to +175°C - supports operation in industrial environments with wide ambient swings |
| Surge Power (PRSM) | 400 W for t = 10 μs - enables transient overvoltage suppression without failure |
Pinout & Package
RD15F uses the standard DO-41 axial-leaded glass package (JEDEC), with cathode indicated by a black band. The device has two terminals: anode and cathode - no internal circuitry or control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased zener configuration; carries forward current up to 200 mA |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher-potential node; sustains regulated voltage drop when reverse biased above Vz |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables reliable power handling and repeatable breakdown characteristics in compact DO-41 form factor |
| E24 Voltage Series Compliance | Supports standardized BOM selection across 2–82 V range without custom voltage bins |
| B3 Grade Voltage Tightness | ±0.74 V tolerance (14.52–15.26 V) improves system-level accuracy vs. broader B-grade variants |
| Positive Tempco at 15 V | +11 mV/°C allows predictable Vz tracking - useful in temperature-compensated reference stacks |
| DO-41 Mechanical Standardization | Ensures compatibility with legacy PCB footprints, wave-soldering processes, and automated insertion equipment |
Applications
| Power Supply Voltage Clamp | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Clamping unregulated 18 V DC input rail to protect 15 V logic interface ICs from overvoltage transients. IC Role / Device Role / Timing Role: Two-terminal passive voltage clamp; conducts only when input exceeds 15.26 V, shunting excess current to ground. Use Value: Prevents latch-up or permanent damage to downstream 15 V-rated components using single-device, low-cost solution with <10 Ω dynamic impedance. |
Use Scenario: Absorbing ESD-induced surges on RS-485 bus lines exposed to industrial environments. IC Role / Device Role / Timing Role: Standby-mode surge suppressor; remains non-conductive until transient exceeds 15.26 V, then clamps within nanoseconds. Use Value: Withstands 400 W/10 μs surge events without degradation, preserving signal integrity while requiring no active control or biasing. |
| Reference Voltage Generator | Waveform Limiter in Signal Conditioning |
Use Scenario: Providing stable 15 V reference for ADC voltage scaling in data acquisition modules operating from 24 V supplies. IC Role / Device Role / Timing Role: Precision DC voltage source; biased at 20 mA to minimize Zz and tempco effects in feedback path. Use Value: Delivers ±0.74 V initial tolerance and +11 mV/°C drift - sufficient for 12-bit system accuracy with simple calibration. |
Use Scenario: Limiting audio amplifier input signal peaks to prevent clipping distortion in consumer audio preamps. IC Role / Device Role / Timing Role: Bidirectional limiter (with series resistor); clips positive excursions above +15.26 V and negative excursions below −0.7 V (forward Vf). Use Value: Achieves symmetrical hard-clipping with fast response and minimal harmonic generation due to low Zz and planar junction capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 15 V nominal, 1 W, DO-41, Zz = 14 Ω @ 20 mA, γZ = +11 mV/°C - identical Vz range and tempco but higher Zz | Suitable for general-purpose clamping where 4 Ω higher dynamic impedance is acceptable | Use when legacy sourcing or dual-sourcing is required; verify layout compatibility with same DO-41 footprint |
| BZX55-C15 | 15 V nominal, 500 mW, DO-35, Zz = 30 Ω @ 5 mA - lower power rating and higher Zz at reduced test current | Limited to low-power signal-level referencing; not suitable for 1 W continuous dissipation | Select only for space-constrained PCBs where thermal budget permits derated operation below 500 mW |
Compared with RD15F, 1N4744A offers identical voltage grading and tempco but trades 4 Ω higher dynamic impedance for broader distributor availability, while BZX55-C15 sacrifices power handling and regulation stiffness for smaller package size - making RD15F optimal for industrial 1 W reference and clamping roles demanding tight Vz tolerance and low Zz.
Availability
RD15F is available at Aetrix Electronics and suitable for industrial power supply design, surge protection systems, and precision analog reference circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for RD15F 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 formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and timing solutions for industrial and automotive markets.
RD15F belongs to the RD2.0F–RD82F planar zener diode family, engineered for high-reliability voltage regulation and transient suppression in standard-grade industrial applications - emphasizing manufacturability, JEDEC compliance, and thermal robustness.
FAQ
What is the exact zener voltage range for RD15F?
The RD15F has a guaranteed zener voltage range of 14.52 V to 15.26 V under B3 grade specification at 20 mA test current, as confirmed in Renesas datasheet D13936EJ5V0DS. This 0.74 V tolerance window reflects tighter binning than standard B-grade variants and is measured using a 40 ms pulse to ensure repeatability. RD15F maintains this specification across its qualified operating temperature range.
Does RD15F have a positive or negative temperature coefficient?
RD15F exhibits a positive zener voltage temperature coefficient of +11 mV/°C typical at 20 mA, meaning its breakdown voltage increases linearly with junction temperature. This behavior is intrinsic to its 15 V planar zener structure and is documented in Figure 4 of the official Renesas datasheet. Designers must account for this drift in precision reference applications where thermal gradients exceed ±10°C.
What package type does RD15F use, and is it RoHS compliant?
RD15F uses the industry-standard DO-41 axial-leaded glass package with cathode marked by a black band, per JEDEC outline. While the 2006 datasheet predates full RoHS enforcement, Renesas confirms all current-production RD15F devices meet EU RoHS Directive requirements - verified through material declarations and Pb-free plating. Always confirm compliance status with latest Renesas environmental reports before high-volume deployment.
Can RD15F replace RD16F in a 16 V reference circuit?
No - RD15F is not a functional replacement for RD16F in a 16 V reference circuit. RD15F's maximum rated zener voltage is 15.26 V (B3 grade), while RD16F guarantees 15.89–16.71 V. Substituting RD15F would result in premature conduction and incorrect regulation. For 16 V applications, RD16F or 1N4745A (16 V) must be used; RD15F is strictly limited to 15 V nominal systems.
What is the maximum surge power RD15F can withstand?
RD15F is rated for 400 W surge reverse power (PRSM) at a pulse width of 10 μs, as specified in Absolute Maximum Ratings and validated in Figure 7 of the Renesas datasheet. This capability enables reliable suppression of short-duration transients such as ESD or inductive kickback without degradation. Performance assumes TA = 25°C and non-repetitive conditions - repeated surges require thermal recovery time between events.
RD15F 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:
- -
RD15F FAQ
1.How can I place an order for RD15F through Aetrix?
Please submit a Request for Quotation (RFQ) for RD15F 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 RD15F reliable?
The price and inventory of RD15F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD15F is usually 5 days.
3.What payment methods are accepted for RD15F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD15F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD15F?
RD15F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD15F 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 RD15F?
For technical support, including RD15F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD15F requirements.
6.How does Aetrix verify that RD15F is sourced from the original manufacturer or authorized distributors?
All RD15F 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 RD15F meets industry standards.
7.What is the process for return or replacement of RD15F?
All RD15F units undergo pre-shipment inspection (PSI). If there is an issue with RD15F, 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 RD15F part is unused and in its original packaging.
Return procedure for RD15F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD15F Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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