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Renesas RD7.5ES-T1-AZ
- Part No.:
- RD7.5ES-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD7.5ES-T1-AZ.pdf
- Description:
- DIODE ZENER
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Inventory:248,000
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Product details
Overview
RD7.5ES-T1-AZ from Renesas Electronics is a 7.5 V, 400 mW DO-34 glass-sealed zener diode with DHD (Double Heatsink Diode) construction, ±5% zener voltage tolerance at 5 mA test current, 4.0 Ω dynamic impedance, and 0.5 µA reverse leakage at 5.0 V, used for precision voltage regulation in low-power analog circuits and overvoltage protection in sensor signal conditioning stages.
For engineers reviewing the RD7.5ES-T1-AZ datasheet, RD7.5ES-T1-AZ pinout, RD7.5ES-T1-AZ application, or RD7.5ES-T1-AZ equivalent, this page delivers verified electrical specs, thermal performance data, JEDEC DO-34 package details, and direct alternative options for voltage reference and surge suppression design-in.
Technical Context
This device operates as a two-terminal silicon planar zener diode optimized for stable breakdown behavior under DC and transient reverse bias. Its DHD construction enables enhanced thermal dissipation in the compact DO-34 package, supporting continuous operation up to 175°C junction temperature and non-repetitive 100 W surge power handling at 10 µs pulse width.
Electrical characteristics are specified at TA = 25°C with pulse testing (40 ms), including knee impedance (ZZK = 0.5 Ω), reverse current (IR = 0.5 µA at VR = 5.0 V), and temperature coefficient behavior aligned with 7.5 V nominal zener voltage per Figure 9.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±5% at IZ = 5 mA - defines precise clamping threshold for voltage reference and overvoltage protection |
| Power Dissipation (P) | 400 mW - maximum continuous DC power at 25°C ambient, derates linearly above 25°C per Fig. 6 |
| Dynamic Impedance (ZZ) | 4.0 Ω at IZ = 5 mA - ensures minimal output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.5 µA at VR = 5.0 V - guarantees low standby current in high-impedance bias networks |
| Surge Power (PRSM) | 100 W at t = 10 µs - supports transient suppression of ESD and inductive kick events |
| Junction Temperature (Tj) | 175°C - allows reliable operation in industrial ambient environments without forced cooling |
| Package | DO-34 (JEDEC) - axial leaded, glass-sealed, 2.4 mm max body length, 5 mm lead pitch compatible with standard PCB insertion |
Pinout & Package
RD7.5ES-T1-AZ uses a two-terminal DO-34 axial package with cathode indicated by a black band. No active pin configuration beyond anode/cathode polarity; terminals are unidirectional and non-reversible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential node; enables forward bias operation up to 150 mA IF |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher potential node during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| DHD construction | Double heatsink geometry improves thermal resistance from junction-to-ambient by ~15% vs. standard DO-34 diodes |
| Planar process | Ensures tight VZ distribution (±5%) and repeatable ZZ/ZZK across production lots |
| E24 standard voltage | 7.5 V nominal aligns with IEC 60063 E24 series, simplifying BOM consolidation across zener families |
| DO-34 glass seal | Hermetic enclosure provides long-term stability and moisture resistance in humid environments |
| Low knee impedance | ZZK = 0.5 Ω enables stable regulation even at very low bias currents (<1 mA) |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller I/O Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature transmitters operating from 24 V loop supply. IC Role / Device Role / Timing Role: Zener shunt regulator providing 7.5 V rail for op-amp biasing and ADC reference buffer. Use Value: 4.0 Ω dynamic impedance maintains <10 mV output shift across 0–2 mA load variation, ensuring <0.1% full-scale error. | Use Scenario: Clamping GPIO pins against ESD and inductive transients in PLC digital input modules. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between microcontroller pin and field wiring. Use Value: 100 W surge rating at 10 µs absorbs IEC 61000-4-2 Level 4 (15 kV air) events without degradation. |
| Low-Power Analog Reference | Surge-Absorbing Power Supply Rail |
Use Scenario: Generating stable 7.5 V bias for instrumentation amplifiers in battery-powered portable meters. IC Role / Device Role / Timing Role: Precision voltage reference source with low IR enabling multi-year operation on coin cell. Use Value: 0.5 µA reverse leakage at 5 V reduces quiescent current by >95% versus 1N4733A in same topology. | Use Scenario: Protecting 9 V auxiliary rail in industrial HMIs from relay coil flyback and lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt clamp on unregulated DC input stage before LDO regulator. Use Value: DHD thermal structure sustains 400 mW continuous dissipation without derating at 70°C board temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal, but 1 W rating, TO-204AA (DO-41) package, 17 Ω ZZ at 49 mA | Higher power handling but larger footprint and higher dynamic impedance limits low-current precision use | Select when >500 mW continuous dissipation or higher surge margin is required; not drop-in due to package and thermal profile mismatch |
| BZX55-C7V5 | 7.5 V ±5%, 500 mW, DO-35 package, 10 Ω ZZ at 5 mA, 1 µA IR at 5 V | Higher leakage and impedance reduce accuracy in low-power references but offer wider availability | Prefer for cost-sensitive consumer designs where 0.5 µA leakage is non-critical; requires layout change for DO-35 vs. DO-34 lead spacing |
Compared with 1N4733A and BZX55-C7V5, RD7.5ES-T1-AZ delivers superior low-current regulation stability (0.5 µA IR, 4.0 Ω ZZ) in the space-constrained DO-34 form factor, making it optimal for high-accuracy, low-quiescent industrial analog signal chains where thermal efficiency and board area are constrained.
Availability
RD7.5ES-T1-AZ is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller I/O protection, low-power analog references, and surge-absorbing power supply rails requiring stable component supply and long-lifecycle support.
Supply support for RD7.5ES-T1-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 specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.
RD7.5ES-T1-AZ belongs to the RD2.0ES–RD39ES zener diode family designed specifically for precision voltage regulation and transient suppression in space-constrained industrial control and measurement equipment.
FAQ
What is the zener voltage tolerance and test condition for RD7.5ES-T1-AZ?
The RD7.5ES-T1-AZ has a zener voltage of 7.5 V with ±5% tolerance, measured at a test current of 5 mA under DC pulse conditions (40 ms duration). This specification is confirmed in the Electrical Characteristics table of Renesas datasheet D13935EJ7V0DS, and applies directly to the RD7.5ES-T1-AZ variant within the RD2.0ES–RD39ES series.
Does RD7.5ES-T1-AZ support high-temperature operation?
Yes, RD7.5ES-T1-AZ is rated for a maximum junction temperature of 175°C and storage temperature range of –65°C to +175°C. Its DO-34 package and DHD construction enable stable operation in industrial environments up to 70°C ambient without derating, as validated by the Power Dissipation vs. Ambient Temperature curve (Fig. 6) in the official Renesas datasheet.
What is the surge power capability of RD7.5ES-T1-AZ?
RD7.5ES-T1-AZ supports a non-repetitive surge reverse power of 100 W at a pulse width of 10 µs, as defined in the Absolute Maximum Ratings table and illustrated in Fig. 10 of the Renesas datasheet D13935EJ7V0DS. This makes RD7.5ES-T1-AZ suitable for absorbing ESD and inductive switching transients in industrial I/O protection circuits.
How does the dynamic impedance of RD7.5ES-T1-AZ affect voltage regulation accuracy?
The RD7.5ES-T1-AZ exhibits 4.0 Ω dynamic impedance at 5 mA, meaning its output voltage shifts only ~20 mV for every 5 mA change in load current. This low ZZ value ensures high regulation accuracy in precision analog circuits - for example, maintaining <0.3% error across 0–2 mA load variation - a key advantage over higher-impedance alternatives like BZX55-C7V5.
Is RD7.5ES-T1-AZ RoHS compliant?
Yes, RD7.5ES-T1-AZ complies with the EU RoHS Directive, 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), and is marked accordingly in Renesas' material declarations and product change notifications.
RD7.5ES-T1-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:
- -
RD7.5ES-T1-AZ FAQ
1.How can I place an order for RD7.5ES-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD7.5ES-T1-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 RD7.5ES-T1-AZ reliable?
The price and inventory of RD7.5ES-T1-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD7.5ES-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD7.5ES-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD7.5ES-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD7.5ES-T1-AZ?
RD7.5ES-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD7.5ES-T1-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 RD7.5ES-T1-AZ?
For technical support, including RD7.5ES-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD7.5ES-T1-AZ requirements.
6.How does Aetrix verify that RD7.5ES-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD7.5ES-T1-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 RD7.5ES-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD7.5ES-T1-AZ?
All RD7.5ES-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD7.5ES-T1-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 RD7.5ES-T1-AZ part is unused and in its original packaging.
Return procedure for RD7.5ES-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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