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Renesas RD5.1F-AZ
- Part No.:
- RD5.1F-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD5.1F-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:391,330
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Product details
Overview
RD5.1F-AZ from Renesas Electronics is a 1 W planar silicon zener diode in DO-41 glass-sealed DHD package, with nominal zener voltage 5.1 V (B3 grade: 5.10–5.38 V), dynamic impedance ≤8 Ω at 40 mA, and temperature coefficient −0.5 mV/°C - used for precision voltage regulation and surge suppression in power supply feedback loops.
For engineers reviewing the RD5.1F-AZ datasheet, RD5.1F-AZ pinout, RD5.1F-AZ application, or RD5.1F-AZ equivalent, key selection criteria include zener voltage tolerance (±2.7% B3 grade), low dynamic impedance for stable regulation under load transients, thermal resistance characteristics for PCB heatsinking, and DO-41 mechanical compatibility with legacy through-hole layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. It delivers stable reverse-biased conduction above its specified zener voltage, with minimal voltage drift over temperature due to its negative temperature coefficient near zero crossing.
Designed for DC voltage clamping and shunt regulation, RD5.1F-AZ supports continuous dissipation up to 1.0 W at 25°C ambient, derating linearly above TA = 25°C per Figure 1, and withstands non-repetitive surge reverse power of 400 W for t = 10 μs per Figure 7.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.10–5.38 V at IZ = 40 mA (B3 grade); enables precise 5.1 V reference with ±2.7% initial tolerance. |
| Dynamic Impedance (ZZ) | ≤8 Ω at IZ = 40 mA; ensures minimal output voltage variation under changing load current. |
| Power Dissipation (P) | 1.0 W at TA = 25°C; defines maximum steady-state heat generation before thermal derating applies. |
| Zener Temp. Coefficient (γZ) | −0.5 mV/°C typical; provides near-zero TC operation near 5.1 V, minimizing drift across industrial temperature range. |
| Reverse Current (IR) | ≤20 μA at VR = 2.0 V; guarantees low leakage in standby or high-impedance bias networks. |
| Surge Reverse Power (PRSM) | 400 W for t = 10 μs; allows transient overvoltage absorption without failure in input protection circuits. |
| Junction Temperature (Tj) | 175°C maximum; sets absolute thermal limit for reliability under sustained power stress. |
Pinout & Package
DO-41 glass-sealed axial package with cathode indicated by black band; leads are tinned copper-clad steel, suitable for wave or hand soldering. Mechanical dimensions: Ø3.0 mm max body diameter, 25 mm min lead length, 5 mm max overall length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common or lower potential side; forms return path during forward bias or shunt regulation. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage node requiring stabilization; maintains fixed potential relative to anode when reverse biased above VZ. |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables higher power handling and improved long-term stability vs. alloy-junction diodes in same footprint. |
| E24 Standard Voltage Series | Supports interoperability with common resistor/capacitor E24 values for predictable analog design scaling. |
| B3 Grade Voltage Tightness | 5.10–5.38 V tolerance (±2.7%) improves accuracy in feedback paths without external trimming. |
| Low Dynamic Impedance (≤8 Ω) | Reduces output ripple and load-regulation error in 5 V LDO pre-regulator or op-amp reference applications. |
| Negative γZ Near Zero Crossing | −0.5 mV/°C minimizes net temperature-induced drift in 5.1 V references across −40°C to +85°C. |
Applications
| Switch-Mode Power Supply Feedback | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Used in optocoupler-coupled secondary-side feedback loop of isolated AC/DC converters. IC Role / Device Role / Timing Role: Zener reference for TL431-like shunt regulator IC or direct voltage clamp on error amplifier input. Use Value: Maintains ±1% output regulation across line/load/temperature by stabilizing reference voltage feeding into isolation barrier. |
Use Scenario: Generates clean 5.1 V threshold for microcontroller reset supervisor IC (e.g., MAX809). IC Role / Device Role / Timing Role: Precision voltage reference defining reset assertion level during brown-out detection. Use Value: Ensures deterministic reset activation at 4.95–5.25 V window, preventing spurious resets during supply ramp-up. |
| Industrial Sensor Signal Conditioning | ESD-Protected I/O Clamp |
Use Scenario: Biasing and offset-setting in 4–20 mA transmitter front-end op-amp stages. IC Role / Device Role / Timing Role: Stable reference for DAC output scaling or current-sense amplifier gain setting. Use Value: Limits gain drift to <0.01%/°C via matched TC with precision resistors, improving sensor accuracy over temperature. |
Use Scenario: Secondary-stage clamp on RS-485 transceiver data lines exposed to board-level ESD events. IC Role / Device Role / Timing Role: Fast-acting shunt limiter absorbing 8 kV HBM transients before reaching IC pins. Use Value: Withstands 400 W surge pulses (10 μs) without parametric shift, preserving signal integrity after repeated ESD strikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V nominal, ±5% tolerance (vs. RD5.1F-AZ's ±2.7% B3), ZZ ≤17 Ω (vs. ≤8 Ω), DO-41 package. | Higher voltage uncertainty and impedance reduce regulation accuracy in precision feedback loops. | Acceptable for cost-sensitive consumer-grade supplies where ±5% output tolerance is acceptable. |
| BZX55-C5V1 | 5.1 V nominal, ±5% tolerance, ZZ ≤60 Ω, DO-35 package (smaller, lower power rating). | Lower surge rating (200 W vs. 400 W) and higher impedance limit use in high-transient or high-stability designs. | Suitable for low-power signal-level clamping but not recommended for primary power rail regulation. |
Compared with 1N4733A and BZX55-C5V1, RD5.1F-AZ offers tighter voltage tolerance, lower dynamic impedance, and higher surge robustness - making it preferred for industrial power supplies and safety-critical reset circuits where regulation stability and transient immunity are design priorities.
Availability
RD5.1F-AZ is available at Aetrix Electronics and suitable for industrial power supplies, embedded system reset circuits, and sensor signal conditioning requiring stable component supply and long-lifecycle support.
Supply support for RD5.1F-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 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
RD5.1F-AZ belongs to the RD2.0F–RD82F planar zener diode family, designed for general-purpose voltage regulation and transient suppression in standard industrial and commercial equipment.
FAQ
What is the exact zener voltage tolerance for RD5.1F-AZ?
The RD5.1F-AZ is specified in B3 grade, with a zener voltage range of 5.10 V to 5.38 V at IZ = 40 mA, corresponding to a ±2.7% tolerance about the nominal 5.1 V value. This tighter tolerance is confirmed in the Electrical Characteristics table of Renesas document D13936EJ5V0DS and distinguishes RD5.1F-AZ from broader-tolerance alternatives like 1N4733A.
Does RD5.1F-AZ have a positive or negative temperature coefficient?
RD5.1F-AZ has a typical zener voltage temperature coefficient (γZ) of −0.5 mV/°C, indicating a negative temperature coefficient. This value is documented in the Electrical Characteristics table for RD5.1F and is consistent with zener diodes operating near the 5–6 V range where the TC crosses zero - enabling stable reference performance across industrial temperature ranges.
What is the maximum surge reverse power RD5.1F-AZ can handle?
RD5.1F-AZ is rated for a non-repetitive surge reverse power (PRSM) of 400 W at pulse width t = 10 μs, as shown in Figure 7 of the official Renesas datasheet D13936EJ5V0DS. This rating is critical for transient voltage suppression in input stage protection circuits and exceeds that of many competing DO-41 zeners.
Is RD5.1F-AZ compatible with automated through-hole assembly?
Yes, RD5.1F-AZ uses the JEDEC-standard DO-41 package with axial leads and tinned terminations, fully compatible with standard wave soldering and selective soldering processes. Its 25 mm minimum lead length and 3.0 mm maximum body diameter meet IPC-7351 requirements for through-hole placement and solder joint formation.
What quality grade is assigned to RD5.1F-AZ per Renesas documentation?
RD5.1F-AZ is classified as "Standard" quality grade per Renesas' product grading policy, as no alternate grade is specified in the datasheet D13936EJ5V0DS. This qualifies it for use in computers, office equipment, communications gear, industrial robots, and similar commercial/industrial applications - but not for automotive safety or life-support systems without explicit requalification.
RD5.1F-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:
- -
RD5.1F-AZ FAQ
1.How can I place an order for RD5.1F-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD5.1F-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 RD5.1F-AZ reliable?
The price and inventory of RD5.1F-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD5.1F-AZ is usually 5 days.
3.What payment methods are accepted for RD5.1F-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD5.1F-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD5.1F-AZ?
RD5.1F-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD5.1F-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 RD5.1F-AZ?
For technical support, including RD5.1F-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD5.1F-AZ requirements.
6.How does Aetrix verify that RD5.1F-AZ is sourced from the original manufacturer or authorized distributors?
All RD5.1F-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 RD5.1F-AZ meets industry standards.
7.What is the process for return or replacement of RD5.1F-AZ?
All RD5.1F-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD5.1F-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 RD5.1F-AZ part is unused and in its original packaging.
Return procedure for RD5.1F-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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