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Renesas RD7.5F
- Part No.:
- RD7.5F
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD7.5F.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:9,270
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Product details
Overview
RD7.5F from Renesas Electronics is a 1 W planar-type silicon Zener diode in DO-41 glass-sealed DHD package, rated for 7.39–7.80 V zener voltage at 40 mA test current, with 4 Ω dynamic impedance and +4.0 mV/°C temperature coefficient. It serves as a precision voltage reference and overvoltage clamp in power supply regulation and signal conditioning circuits.
For engineers reviewing the RD7.5F datasheet, RD7.5F pinout, RD7.5F application, or RD7.5F equivalent, key selection criteria include its ±0.41 V zener tolerance at 40 mA, 40 μA reverse leakage at 4.0 V, 175 °C max junction temperature, and suitability for surge absorption and waveform limiting in industrial and consumer power rails.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its planar construction ensures stable thermal performance and low dynamic impedance (4 Ω), enabling fast transient response in clamping applications.
The device exhibits a positive temperature coefficient (+4.0 mV/°C) - characteristic of mid-voltage Zeners - minimizing drift under ambient temperature variation. It complies with JEDEC DO-41 mechanical standards and is rated for 400 W surge reverse power at 10 μs pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.39–7.80 V at IZ = 40 mA - defines precise DC reference or clamping threshold in regulated supplies. |
| Dynamic Impedance (ZZ) | 4 Ω max at IZ = 40 mA - ensures minimal voltage deviation under load transients. |
| Reverse Leakage (IR) | 20 μA max at VR = 4.0 V - guarantees low standby power loss in high-impedance bias networks. |
| Power Dissipation (P) | 1.0 W at TA = 25°C - supports continuous operation in compact PCB layouts with adequate heatsinking. |
| Temp. Coefficient (γZ) | +4.0 mV/°C typical - enables predictable, low-drift behavior in ambient ranges up to 125°C. |
| Junction Temperature (Tj) | 175 °C max - allows reliable operation in thermally demanding industrial environments. |
| Surge Power (PRSM) | 400 W at t = 10 μs - provides robust protection against ESD and short-duration line surges. |
Pinout & Package
RD7.5F uses a standard DO-41 axial-leaded glass package (JEDEC compliant), with cathode indicated by a black band. The device has two terminals: anode and cathode - no internal connections or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener operation; carries forward current up to 200 mA. |
| Cathode | Breakdown voltage reference terminal | Marked with black band; defines regulated output node when reverse-biased; sinks current during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| E24-series voltage grading | Enables standardized BOM management across 2–82 V Zener family with consistent tolerancing. |
| Planar DHD structure | Delivers improved thermal stability and reliability vs. alloy-junction diodes in repetitive surge conditions. |
| 1 W glass-sealed DO-41 | Offers proven mechanical ruggedness and moisture resistance for long-term field deployment. |
| Wide operating Tstg | −65 to +175 °C storage range supports reflow, wave, and hand-soldering without parameter shift. |
| B-grade voltage binning | Supports customer-selectable B1/B2/B3 subgrades (7.39–7.80 V) for tighter system-level tolerance stacking. |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Provides fixed reference voltage to comparator or op-amp input, setting output regulation point. Use Value: 4 Ω ZZ minimizes regulation error under load step changes; +4.0 mV/°C γZ reduces thermal drift in ambient-varying enclosures. |
Use Scenario: Protecting microcontroller I/O pins or sensor inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Shunts excess energy to ground when input exceeds 7.80 V, preventing latch-up or damage. Use Value: 400 W surge rating at 10 μs absorbs common-mode spikes per IEC 61000-4-5 Level 3 without degradation. |
| Waveform Limiting Circuit | Constant-Current Bias Generator |
Use Scenario: Clipping audio or analog signal peaks to prevent amplifier saturation or ADC overflow. IC Role / Device Role / Timing Role: Acts as bidirectional limiter (with series resistor) to constrain signal excursion within defined bounds. Use Value: Sharp knee at 7.39 V enables clean clipping onset; low ZZ preserves signal fidelity during active conduction. |
Use Scenario: Establishing stable bias current for LED drivers or transistor amplifiers via series resistor + Zener. IC Role / Device Role / Timing Role: Maintains constant voltage drop across series resistor, yielding predictable IBIAS = (VIN − VZ)/R. Use Value: Tight 7.39–7.80 V tolerance ensures ±2.7% current accuracy; 1 W rating supports >10 mA bias currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A (ON Semiconductor) | 7.5 V nominal, ±5% tolerance (7.13–7.88 V), 16 Ω ZZ, +5.0 mV/°C γZ, DO-41 | Wider voltage spread and higher ZZ reduce regulation precision in low-current references. | Acceptable where ±5% VZ tolerance and moderate thermal drift are acceptable; verify layout thermal relief for 1 W dissipation. |
| BZX55-C7V5 (Vishay) | 7.5 V nominal, ±5% tolerance (7.13–7.88 V), 15 Ω ZZ, +4.5 mV/°C γZ, DO-35 | DO-35 package limits power handling to 500 mW; unsuitable for sustained 1 W operation. | Only suitable for low-power biasing or signal clipping; requires derating above 70°C ambient due to smaller thermal mass. |
Compared with RD7.5F, the 1N4734A offers broader availability but sacrifices regulation tightness and low-impedance clamping; the BZX55-C7V5 fits space-constrained designs but cannot sustain full 1 W dissipation, making RD7.5F the preferred choice for industrial power rail stabilization and surge-limited protection.
Availability
RD7.5F is available at Aetrix Electronics and suitable for power supply regulation, overvoltage protection, and waveform limiting applications requiring stable component supply and long-term obsolescence management.
Supply support for RD7.5F 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 specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and consumer systems.
RD7.5F belongs to Renesas' legacy planar Zener diode family designed for cost-effective, high-reliability voltage reference and protection in standard-grade industrial and consumer electronics.
FAQ
What is the zener voltage tolerance of RD7.5F at 40 mA test current?
The RD7.5F has a guaranteed zener voltage range of 7.39 V to 7.80 V when tested at IZ = 40 mA, corresponding to a ±2.7% tolerance about the nominal 7.5 V value. This specification is validated per the Renesas D13936EJ5V0DS datasheet, and applies to all B-grade units. The RD7.5F's tight binning supports accurate voltage setting in feedback loops and precision clamping circuits.
Can RD7.5F be used in surface-mount designs?
No - RD7.5F is packaged exclusively in the through-hole DO-41 axial lead format and is not available in SMD variants such as SOD-123 or SMA. Its glass-sealed DHD construction requires hole mounting and wave or hand soldering. For SMT-compatible alternatives, consider Renesas' RBxx8MM series or equivalent 7.5 V Zeners in DO-214AC packages, but note differences in thermal performance and surge capability versus RD7.5F.
What is the maximum reverse leakage current for RD7.5F at 4.0 V?
The RD7.5F specifies a maximum reverse leakage current (IR) of 20 μA at VR = 4.0 V and TA = 25°C. This low leakage ensures minimal quiescent power draw in high-impedance bias networks and prevents unintended loading of sensitive analog nodes. The value is measured per the test conditions defined in the official Renesas datasheet D13936EJ5V0DS.
Does RD7.5F meet RoHS requirements?
Yes - RD7.5F complies with the EU RoHS Directive (2011/65/EU) as confirmed by Renesas Electronics' environmental compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits. Full substance declarations and material composition data are available upon request from Aetrix Electronics.
How does the +4.0 mV/°C temperature coefficient affect RD7.5F in a 0–70°C operating range?
With a typical temperature coefficient of +4.0 mV/°C, the RD7.5F's zener voltage increases by approximately 280 mV across a 70°C span (e.g., from 25°C to 95°C). This results in a +3.7% relative shift from nominal 7.5 V - acceptable for non-critical biasing but warrants compensation in precision references. The coefficient is specified in the D13936EJ5V0DS datasheet and verified under controlled thermal testing conditions.
RD7.5F 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:
- -
RD7.5F FAQ
1.How can I place an order for RD7.5F through Aetrix?
Please submit a Request for Quotation (RFQ) for RD7.5F 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 RD7.5F reliable?
The price and inventory of RD7.5F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD7.5F is usually 5 days.
3.What payment methods are accepted for RD7.5F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD7.5F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD7.5F?
RD7.5F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD7.5F 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 RD7.5F?
For technical support, including RD7.5F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD7.5F requirements.
6.How does Aetrix verify that RD7.5F is sourced from the original manufacturer or authorized distributors?
All RD7.5F 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 RD7.5F meets industry standards.
7.What is the process for return or replacement of RD7.5F?
All RD7.5F units undergo pre-shipment inspection (PSI). If there is an issue with RD7.5F, 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 RD7.5F part is unused and in its original packaging.
Return procedure for RD7.5F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD7.5F Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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