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Renesas RD7.5S(0)-T1-AT
- Part No.:
- RD7.5S(0)-T1-AT
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
RD7.5S(0)-T1-AT.pdf
- Description:
- DIODE ZENER 2-SUPER MINI MOLD
- Quantity:
- Payment:
- Shipping:
Inventory:99,000
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Product details
Overview
RD7.5S(0)-T1-AT from Renesas Electronics is a 200 mW, 7.5 V Zener diode in Super Mini Mold (SOD-323) package, featuring sharp breakdown characteristic, dynamic impedance of 30 Ω at 5 mA, and reverse current ≤2 μA at 4.0 V. It serves as a precision voltage reference and surge absorber in low-power analog signal conditioning circuits.
For engineers reviewing the RD7.5S(0)-T1-AT datasheet, RD7.5S(0)-T1-AT pinout, RD7.5S(0)-T1-AT application, or RD7.5S(0)-T1-AT equivalent, this page delivers verified electrical specs, thermal derating behavior, zener voltage tolerance (±4.5% at 7.03–7.87 V), and direct alternatives for voltage regulation and waveform clamping in consumer and industrial electronics.
Technical Context
This Zener diode operates with a nominal zener voltage of 7.5 V, tested under pulsed conditions (40 ms), and exhibits a temperature coefficient of approximately +0.04 %/°C per Fig.9 - indicating positive drift above ~5 V. Its dynamic impedance remains stable at 30 Ω when biased at 5 mA, supporting consistent regulation across load variations.
The device is rated for junction temperatures up to 150°C and storage from –55°C to +150°C. With a reverse surge power rating of 85 W (t = 10 μs, single pulse), it provides transient overvoltage protection without requiring external series limiting resistors in low-energy clamp applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.03–7.87 V at IZ = 5 mA - defines usable regulation window for ±4.5% tolerance designs |
| Dynamic Impedance (ZZ) | 30 Ω max at IZ = 5 mA - ensures minimal output voltage shift under small-signal load changes |
| Power Dissipation (P) | 200 mW at TA = 25°C - limits continuous bias current to ~26 mA at 7.5 V without heatsinking |
| Reverse Current (IR) | ≤2 μA at VR = 4.0 V - guarantees high off-state impedance for low-leakage reference nodes |
| Junction Temperature (Tj) | 150°C max - sets upper thermal boundary for PCB layout and ambient derating calculations |
| Surge Power (PRSM) | 85 W for 10 μs pulse - enables single-event ESD/surge suppression without external TVS staging |
| Package | SOD-323 (2-pin Super Mini Mold) - 1.25 mm × 0.9 mm footprint ideal for space-constrained portable PCBs |
Pinout & Package
RD7.5S(0)-T1-AT uses the SOD-323 surface-mount package with cathode indicated by a band on one end. The package measures 1.25±0.1 mm × 0.9±0.1 mm × 0.3±0.05 mm and features gull-wing leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node; carries forward current up to 100 mA during transient events |
| Cathode | Zener breakdown terminal | Marked with band; connected to regulated voltage rail; sinks current during reverse-bias regulation |
Key Features
| Feature | Design Value |
|---|---|
| Sharp breakdown characteristic | Enables clean voltage clamping with minimal knee-region ambiguity in low-current biasing |
| VZ conforms to E24 standard | Supports interoperability with standard resistor/capacitor value families in feedback networks |
| 200 mW power rating | Permits use in battery-powered devices where thermal mass is limited and no heatsink is feasible |
| Cathode band marking | Ensures unambiguous orientation during automated placement and visual inspection |
| RoHS-compliant construction | Meets EU Directive 2011/65/EU for lead-free soldering and environmental compliance |
Applications
| USB Port Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping induced transients on USB D+/D− lines during hot-plug or ESD events. IC Role / Device Role / Timing Role: Zener clamp protecting PHY transceivers from >±8 kV contact discharge per IEC 61000-4-2. Use Value: Limits line voltage to ≤7.9 V while absorbing 85 W surges, preventing latch-up or damage to 3.3 V tolerant I/O cells. | Use Scenario: Generating a stable reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in supervisor IC or discrete reset generator. Use Value: Delivers ±4.5% regulation tolerance and <2 μA leakage at 4 V, ensuring reliable reset assertion without loading supply rails. |
| Audio Signal Leveling | Industrial Sensor Biasing |
Use Scenario: Limiting peak amplitude in analog audio preamp stages to prevent ADC saturation. IC Role / Device Role / Timing Role: Bidirectional clipper (forward + reverse) shaping signal envelope before digitization. Use Value: Sharp 7.5 V knee enables symmetrical clipping at ±7.5 V with <30 Ω dynamic resistance, preserving waveform fidelity. | Use Scenario: Providing stable excitation voltage to resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift voltage reference for Wheatstone bridge bias in 0–10 V measurement channels. Use Value: Positive tempco (+0.04%/°C) partially compensates typical RTD/strain gauge drift, improving system-level accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C7V5 | Same 7.5 V nominal, 200 mW rating, but SOD-523 package (smaller: 1.2 × 0.8 mm); ZZ = 35 Ω max | Higher board density possible; slightly higher dynamic impedance reduces regulation precision | Choose BZX584-C7V5 only if PCB area is constrained and ±5% regulation tolerance is acceptable. |
| MMSZ5236B | 7.5 V nominal, 500 mW rating, SOD-123 package; ZZ = 15 Ω max at 20 mA; tighter tolerance (±5% vs ±4.5%) | Higher power handling supports 20 mA bias; lower ZZ improves load regulation but requires larger footprint | Select MMSZ5236B when sustained current >15 mA or improved regulation stability is required despite larger size. |
Compared with RD7.5S(0)-T1-AT, BZX584-C7V5 trades package miniaturization for marginally higher impedance, while MMSZ5236B offers superior regulation performance at the cost of 2.5× PCB area - making RD7.5S(0)-T1-AT optimal for space-limited 5–10 mA reference designs requiring tight voltage tolerance and proven thermal reliability.
Availability
RD7.5S(0)-T1-AT is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, audio signal clipping, and industrial sensor biasing requiring stable component supply and long-term obsolescence management.
Supply support for RD7.5S(0)-T1-AT 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.
The RD2.0S to RD150S series was designed for compact, low-power voltage regulation and transient suppression in consumer, office, and industrial equipment - emphasizing reliability, E24 compatibility, and standardized SOD-323 packaging.
FAQ
What is the exact zener voltage range specified for RD7.5S(0)-T1-AT?
The RD7.5S(0)-T1-AT has a guaranteed zener voltage range of 7.03 V to 7.87 V when tested at IZ = 5 mA using pulsed (40 ms) conditions, per Renesas datasheet D11444EJ6V0DS. This ±4.5% tolerance aligns with E24 standard values and applies to all units within the B-class grading. The device does not specify tighter binning (e.g., B1/B2/B3) in its full part number, so design margins must accommodate the full min/max span.
Can RD7.5S(0)-T1-AT be used in place of a 5.1 V Zener diode?
No - RD7.5S(0)-T1-AT is strictly a 7.5 V zener diode with a minimum VZ of 7.03 V and maximum of 7.87 V. Substituting it for a 5.1 V device would result in incorrect regulation voltage, potentially causing overvoltage stress on downstream components. For 5.1 V applications, Renesas' RD5.1S(0)-T1-AT (4.82–5.39 V) or equivalent should be selected instead.
What is the maximum allowable forward current for RD7.5S(0)-T1-AT?
The absolute maximum forward current for RD7.5S(0)-T1-AT is 100 mA at TA = 25°C, as stated in the Absolute Maximum Ratings table. However, sustained forward conduction is not its intended operating mode; the device is optimized for reverse-bias zener operation. Continuous forward current above ~20 mA may cause excessive self-heating and degrade long-term reliability.
Does RD7.5S(0)-T1-AT have automotive qualification?
No - RD7.5S(0)-T1-AT is classified as a "Standard" quality grade device per Renesas documentation, intended for computers, office equipment, communications gear, and industrial robots. It is not qualified to AEC-Q200 or rated for automotive under-hood or safety-critical applications. For automotive use, Renesas' "High Quality" grade Zeners (e.g., specific variants with extended temp range and qualification testing) must be selected.
How does the thermal derating curve affect RD7.5S(0)-T1-AT's usable power at 70°C ambient?
Per Fig.1 in the datasheet, RD7.5S(0)-T1-AT's power dissipation derates linearly from 200 mW at 25°C to ~120 mW at 70°C ambient on a standard FR-4 PCB (30 mm × 30 mm × 1.6 mm). This means the maximum continuous zener current drops from ~26.7 mA (200 mW / 7.5 V) to ~16 mA (120 mW / 7.5 V), requiring appropriate series resistance selection to avoid exceeding thermal limits.
RD7.5S(0)-T1-AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-Super Mini Mold
RD7.5S(0)-T1-AT FAQ
1.How can I place an order for RD7.5S(0)-T1-AT through Aetrix?
Please submit a Request for Quotation (RFQ) for RD7.5S(0)-T1-AT 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 RD7.5S(0)-T1-AT reliable?
The price and inventory of RD7.5S(0)-T1-AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD7.5S(0)-T1-AT is usually 5 days.
3.What payment methods are accepted for RD7.5S(0)-T1-AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD7.5S(0)-T1-AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD7.5S(0)-T1-AT?
RD7.5S(0)-T1-AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD7.5S(0)-T1-AT 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 RD7.5S(0)-T1-AT?
For technical support, including RD7.5S(0)-T1-AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD7.5S(0)-T1-AT requirements.
6.How does Aetrix verify that RD7.5S(0)-T1-AT is sourced from the original manufacturer or authorized distributors?
All RD7.5S(0)-T1-AT 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 RD7.5S(0)-T1-AT meets industry standards.
7.What is the process for return or replacement of RD7.5S(0)-T1-AT?
All RD7.5S(0)-T1-AT units undergo pre-shipment inspection (PSI). If there is an issue with RD7.5S(0)-T1-AT, 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 RD7.5S(0)-T1-AT part is unused and in its original packaging.
Return procedure for RD7.5S(0)-T1-AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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