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Renesas RD7.5JS-T1-AZ
- Part No.:
- RD7.5JS-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD7.5JS-T1-AZ.pdf
- Description:
- DIODE ZENER
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Inventory:14,000
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Product details
Overview
RD7.5JS-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 power supply reference circuits.
For engineers reviewing the RD7.5JS-T1-AZ datasheet, RD7.5JS-T1-AZ pinout, RD7.5JS-T1-AZ application, or RD7.5JS-T1-AZ equivalent, this page delivers verified electrical specs, thermal performance data, JEDEC DO-34 package details, and real-world use cases for constant-voltage clamping and overvoltage protection in industrial control and consumer electronics.
Technical Context
This zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its planar junction structure ensures consistent breakdown characteristics, while the DHD construction improves thermal dissipation by enabling dual heat paths through both leads.
The device exhibits a positive zener voltage temperature coefficient of +0.035 %/°C (≈+2.6 mV/°C) near 7.5 V, confirmed in Fig. 9 of D13935EJ7V0DS, and supports non-repetitive surge reverse power up to 100 W for 10 µs pulses per Fig. 10.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V nominal, 6.88–7.64 V range at IZ = 5 mA - defines stable regulation point for feedback loops |
| Power Dissipation (P) | 400 mW at TA = 25°C - sets maximum continuous DC power handling before thermal derating |
| Dynamic Impedance (ZZ) | 4.0 Ω at IZ = 5 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.5 µA max at VR = 5.0 V - ensures minimal quiescent current in standby or low-power modes |
| Surge Power (PRSM) | 100 W for t = 10 µs - enables transient overvoltage suppression without failure |
| Junction Temperature (Tj) | 175°C max - allows operation in high-ambient environments like enclosed power supplies |
| Package | DO-34 (JEDEC) - axial glass body, 2.4 mm max length, 5 mm lead pitch for compact PCB insertion |
Pinout & Package
RD7.5JS-T1-AZ uses a two-terminal DO-34 axial glass package with cathode indicated by a black band. Leads are unmarked but follow standard diode polarity: banded end is cathode; opposite end is anode. No internal pin numbering applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse bias reference node | Connected to lower-potential side of regulated circuit; establishes reference ground path during zener operation |
| Cathode | Zener breakdown terminal / Voltage regulation output | Connected to higher-potential side; delivers stable 7.5 V reference when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| DHD construction | Dual heatsink path via both axial leads reduces thermal resistance, enabling full 400 mW rating in compact DO-34 form factor |
| Planar junction process | Ensures tight VZ distribution (±5%) and repeatable knee characteristics for reliable regulation across production lots |
| E24 standard voltage | 7.5 V aligns with IEC 60063 E24 series, simplifying BOM consolidation and cross-referencing with other zener families |
| DO-34 glass seal | Hermetic encapsulation provides long-term stability and moisture resistance in humid or industrial environments |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing precise 7.5 V setpoint to error amplifier input. Use Value: Maintains ±1% output voltage accuracy over line/load variations due to low 4.0 Ω ZZ and stable VZ tempco. | Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback exceeding 5.5 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground when voltage exceeds 7.5 V. Use Value: Absorbs 100 W surges for 10 µs without degradation, preventing latch-up or gate oxide damage in downstream ICs. |
| Waveform Clipper | Surge Absorber |
Use Scenario: Limiting AC signal amplitude in audio preamp stages to prevent distortion. IC Role / Device Role / Timing Role: Bidirectional clipping element (with series resistor) constraining peak-to-peak swing to ±7.5 V. Use Value: Delivers sharp, repeatable clipping threshold with minimal forward drop (0.7 V typical), preserving signal fidelity. | Use Scenario: Suppressing lightning-induced transients on 24 V DC control lines in factory automation systems. IC Role / Device Role / Timing Role: Primary shunt protector placed before TVS diodes or optocouplers in field wiring interfaces. Use Value: Handles repetitive 100 W surges with <10 ns response time, reducing stress on downstream protection components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 7.5 V nominal, 1 W rating, DO-41 package, 5.5 Ω ZZ, 10 µA IR at 5 V | Higher power handling but larger footprint and higher leakage; less suitable for space-constrained low-IQ designs | Select when >400 mW continuous dissipation is required and board area permits DO-41 |
| BZX55-C7V5 | 7.5 V nominal, 500 mW rating, DO-35 package, 10 Ω ZZ, 0.5 µA IR at 5 V | Same leakage but higher ZZ and different thermal profile; DO-35 has lower Pderate slope above 70°C | Select when tighter VZ tolerance (±5% vs ±6%) is critical and DO-35 layout is standardized |
Compared with 1N4734A and BZX55-C7V5, RD7.5JS-T1-AZ offers the lowest dynamic impedance (4.0 Ω) in a DO-34 package, delivering superior regulation stability in low-power analog references where thermal mass and board space are constrained.
Availability
RD7.5JS-T1-AZ is available at Aetrix Electronics and suitable for industrial control systems, consumer power adapters, and automotive body electronics requiring stable component supply with RoHS-compliant packaging and traceable lot history.
Supply support for RD7.5JS-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 global semiconductor leader formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The RD2.0ES–RD39ES series was designed for cost-sensitive, high-volume voltage regulation and protection applications in standard-grade electronics such as office equipment, audio systems, and industrial controls.
FAQ
What is the zener voltage tolerance for RD7.5JS-T1-AZ at 5 mA test current?
The RD7.5JS-T1-AZ has a zener voltage range of 6.88 V to 7.64 V at IZ = 5 mA, corresponding to ±5% tolerance per the RD7.5ES row in Table on page 3 of D13935EJ7V0DS. This tolerance is guaranteed across production lots and validated using E24 standard voltage grading.
Does RD7.5JS-T1-AZ support surge protection, and what is its maximum non-repetitive pulse rating?
Yes, RD7.5JS-T1-AZ supports surge protection with a non-repetitive surge reverse power rating of 100 W at pulse width t = 10 µs, as specified in Absolute Maximum Ratings and illustrated in Fig. 10 of D13935EJ7V0DS. This enables robust transient suppression in interface and power rail applications.
What is the thermal resistance characteristic of RD7.5JS-T1-AZ, and how does it affect PCB layout?
RD7.5JS-T1-AZ exhibits a junction-to-ambient thermal resistance of approximately 375°C/W on a 7 mm² PCB (Fig. 7), decreasing with larger copper area. For reliable 400 mW operation, designers should use ≥10 mm² copper pads per lead and avoid narrow traces to prevent thermal runaway at elevated ambient temperatures.
Is RD7.5JS-T1-AZ RoHS compliant, and what is its lead finish?
Yes, RD7.5JS-T1-AZ is RoHS compliant per Renesas' environmental policy (Note 10). The device uses matte tin-plated leads, confirmed by Renesas' material declarations and consistent with JEDEC DO-34 industry standards for lead-free assembly compatibility.
How does the DHD (Double Heatsink Diode) construction improve thermal performance in RD7.5JS-T1-AZ?
The DHD construction in RD7.5JS-T1-AZ provides two parallel thermal conduction paths - one through each axial lead - reducing effective thermal resistance versus conventional single-lead diodes. This allows RD7.5JS-T1-AZ to sustain its full 400 mW rating in compact DO-34 packages without requiring external heatsinking.
RD7.5JS-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:
- -
RD7.5JS-T1-AZ FAQ
1.How can I place an order for RD7.5JS-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD7.5JS-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 RD7.5JS-T1-AZ reliable?
The price and inventory of RD7.5JS-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 RD7.5JS-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD7.5JS-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD7.5JS-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD7.5JS-T1-AZ?
RD7.5JS-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD7.5JS-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 RD7.5JS-T1-AZ?
For technical support, including RD7.5JS-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD7.5JS-T1-AZ requirements.
6.How does Aetrix verify that RD7.5JS-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD7.5JS-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 RD7.5JS-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD7.5JS-T1-AZ?
All RD7.5JS-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD7.5JS-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 RD7.5JS-T1-AZ part is unused and in its original packaging.
Return procedure for RD7.5JS-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD7.5JS-T1-AZ Tags
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