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Renesas RD15F-T7-AZ
- Part No.:
- RD15F-T7-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD15F-T7-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:63,500
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Product details
Overview
RD15F-T7-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode with a nominal zener voltage of 15 V (B-grade, 14.52–15.26 V), DO-41 glass-sealed DHD package, and ±20% voltage tolerance at IZ = 20 mA. It delivers 20 mA zener test current, 10 Ω dynamic impedance, and −11 mV/°C temperature coefficient - optimized for precision voltage reference and surge suppression in industrial power rails.
For engineers reviewing the RD15F-T7-AZ datasheet, RD15F-T7-AZ pinout, RD15F-T7-AZ application, or RD15F-T7-AZ equivalent, this part serves as a standardized, JEDEC-compliant 15 V Zener solution for voltage regulation, waveform clipping, and transient absorption where stable reverse breakdown and thermal robustness up to 175°C junction temperature are required.
Technical Context
This device operates as a two-terminal voltage-reference diode relying on controlled avalanche and Zener breakdown mechanisms. Its planar construction ensures consistent breakdown characteristics and low leakage (<10 μA at VR = 12 V), while the glass-sealed DO-41 package provides mechanical stability and hermetic reliability under thermal cycling.
The RD15F-T7-AZ exhibits a negative temperature coefficient (−11 mV/°C) typical of mid-voltage Zeners, enabling predictable drift compensation in bias networks. Its 400 W surge reverse power rating (t = 10 μs) supports transient energy clamping without degradation when used within its 1 W steady-state dissipation limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.52–15.26 V at IZ = 20 mA - defines precise clamping threshold for 15 V rail stabilization |
| 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 minimal output voltage variation under load current changes |
| Reverse Current (IR) | <10 μA at VR = 12 V - guarantees low standby leakage in high-impedance reference circuits |
| Temperature Coefficient (γZ) | −11 mV/°C typical - enables predictable voltage drift compensation across −65°C to +175°C operating range |
| Junction Temperature (Tj) | 175°C maximum - allows operation in high-ambient industrial environments with appropriate heatsinking |
| Surge Reverse Power (PRSM) | 400 W (t = 10 μs) - supports single-event ESD or lightning-induced transient suppression |
Pinout & Package
DO-41 glass-sealed axial package with cathode band marking (black). Total length ≤ 5.0 mm, body diameter ≤ 3.0 mm, lead diameter 0.5 mm. Cathode terminal is marked by black band; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower potential; carries forward current up to 200 mA |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 15 V reference when reverse-biased; must be connected to higher-potential rail |
Key Features
| Feature | Design Value |
|---|---|
| E24-series voltage standardization | Enables BOM consolidation across 2–82 V Zener family with consistent packaging and reliability |
| Planar-type DHD structure | Delivers repeatable breakdown voltage and low parameter spread vs. diffused-junction alternatives |
| DO-41 JEDEC compliance | Ensures mechanical interchangeability with legacy 1 W Zener designs and automated assembly compatibility |
| 175°C maximum junction temperature | Supports deployment in enclosed industrial enclosures without forced cooling |
| −65°C to +175°C storage range | Validates suitability for automotive under-hood or outdoor telecom equipment storage conditions |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in linear regulator or switching converter auxiliary bias supply. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing fixed 15 V reference point for error amplifier input. Use Value: Maintains ±2% output regulation over line/load variations due to low ZZ and tight VZ tolerance. |
Use Scenario: Clamping induced transients on 12–15 V control bus lines in PLC I/O modules. IC Role / Device Role / Timing Role: Passive shunt protector absorbing surge energy exceeding 12 V threshold. Use Value: Limits peak voltage to ≤15.3 V during 10 μs surges up to 400 W, preventing downstream IC damage. |
| Waveform Clipping in Signal Conditioning | Temperature-Stable Bias Network |
Use Scenario: Limiting analog sensor signal swing to ±15 V full-scale range before ADC input. IC Role / Device Role / Timing Role: Symmetrical dual-Zener clamp (with complementary device) defining hard voltage boundaries. Use Value: Achieves <10 ns response to overvoltage events with sub-10 Ω effective clamping impedance. |
Use Scenario: Setting bias point for op-amp input stage in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Low-drift voltage reference establishing stable DC offset independent of ambient temperature. Use Value: Delivers <±0.1% VZ drift over 0–70°C due to predictable −11 mV/°C γZ and matched thermal design. |
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 max, γZ = −8.5 mV/°C, tighter VZ tolerance (±5%) | Slightly lower tempco and tighter tolerance; less suitable for cost-sensitive industrial designs requiring wider grading | Preferred where higher precision and lower drift are critical; requires validation of surge rating match |
| BZX55-C15 | 15 V nominal, 500 mW, DO-35, ZZ = 30 Ω max, γZ = −10 mV/°C, same tempco sign but higher impedance | Lower power rating limits use to low-current references; DO-35 package incompatible with 1 W board layouts | Only viable for space-constrained, low-power designs; not drop-in due to power and package mismatch |
Compared with RD15F-T7-AZ, the 1N4744A offers improved precision but reduced surge margin, while the BZX55-C15 sacrifices power handling and thermal robustness for miniaturization - making RD15F-T7-AZ the optimal choice for industrial 1 W Zener applications demanding reliability, thermal resilience, and JEDEC-standard packaging.
Availability
RD15F-T7-AZ is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, and waveform clipping applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for RD15F-T7-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 formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The RD15F-T7-AZ belongs to Renesas' legacy RDx.F series of 1 W planar Zener diodes, designed specifically for cost-effective, high-reliability voltage reference and transient suppression in standard industrial equipment.
FAQ
What is the exact zener voltage range for RD15F-T7-AZ at 20 mA test current?
The RD15F-T7-AZ has a guaranteed zener voltage range of 14.52 V to 15.26 V when measured at IZ = 20 mA and TA = 25°C, per the B-grade specification in Renesas data sheet D13936EJ5V0DS. This 5% tolerance window reflects the standard binning for the RD15F variant and is validated using 40 ms pulse testing per Note 1.
Is RD15F-T7-AZ RoHS compliant and lead-free?
Yes, RD15F-T7-AZ is RoHS compliant and lead-free. Renesas confirms environmental compliance per EU RoHS Directive in its product documentation and material declarations. The DO-41 glass package contains no restricted substances above threshold limits, and the device meets JEDEC J-STD-609A Class 1 marking requirements for lead-free identification.
What is the maximum allowable surge reverse power for RD15F-T7-AZ and under what conditions?
The RD15F-T7-AZ supports a maximum surge reverse power of 400 W for pulse width t = 10 μs at TA = 25°C, as specified in Figure 7 of the datasheet. This rating applies to non-repetitive events only; repeated surges require derating based on thermal time constants shown in Figure 8's transient thermal impedance curve.
Can RD15F-T7-AZ be used in place of RD15F without the -T7-AZ suffix?
No - RD15F-T7-AZ is a specific ordering variant with defined tape-and-reel packaging (T7) and Renesas' standard quality grade (AZ). While electrically identical to base RD15F, the -T7-AZ suffix indicates shipping format and traceability compliance; substituting non-T7-AZ versions may impact automated assembly or lot traceability requirements in production.
What is the thermal resistance from junction to ambient for RD15F-T7-AZ in free air?
RD15F-T7-AZ has no fixed RθJA value because thermal performance depends on PCB copper area. Figure 2 in the datasheet shows Rθ = 240°C/W for S = 5 mm² foil area, 160°C/W for S = 10 mm², and 120°C/W for S = 20 mm². For reliable 1 W operation, ≥20 mm² of 1 oz copper pad per lead is recommended to maintain Tj ≤175°C.
RD15F-T7-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:
- -
RD15F-T7-AZ FAQ
1.How can I place an order for RD15F-T7-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD15F-T7-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 RD15F-T7-AZ reliable?
The price and inventory of RD15F-T7-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD15F-T7-AZ is usually 5 days.
3.What payment methods are accepted for RD15F-T7-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD15F-T7-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD15F-T7-AZ?
RD15F-T7-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD15F-T7-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 RD15F-T7-AZ?
For technical support, including RD15F-T7-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD15F-T7-AZ requirements.
6.How does Aetrix verify that RD15F-T7-AZ is sourced from the original manufacturer or authorized distributors?
All RD15F-T7-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 RD15F-T7-AZ meets industry standards.
7.What is the process for return or replacement of RD15F-T7-AZ?
All RD15F-T7-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD15F-T7-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 RD15F-T7-AZ part is unused and in its original packaging.
Return procedure for RD15F-T7-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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