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Renesas RD7.5M-T2B-A
- Part No.:
- RD7.5M-T2B-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
RD7.5M-T2B-A.pdf
- Description:
- RD7.5M-T2B-A - ZENER DIODES 200
- Quantity:
- Payment:
- Shipping:
Inventory:108,000
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Product details
Overview
RD7.5M-T2B-A from Renesas Electronics is a 200 mW planar zener diode with nominal zener voltage 7.5 V (±4.7% tolerance, Class B3), dynamic impedance ≤30 Ω at 5 mA, and maximum reverse current 2 μA at 4.0 V. It operates in constant-voltage regulation and surge absorption circuits within industrial control and power supply feedback paths.
For engineers reviewing the RD7.5M-T2B-A datasheet, RD7.5M-T2B-A pinout, RD7.5M-T2B-A application, or RD7.5M-T2B-A equivalent, this device serves as a precision low-power voltage reference and transient clamp in space-constrained SC-59 (JEITA) packaged designs requiring stable 7.5 V regulation under 5 mA test conditions.
Technical Context
This zener diode uses planar silicon processing to achieve tight voltage tolerance (±4.7% over 7.52–7.84 V), low dynamic impedance (≤30 Ω at IZ = 5 mA), and controlled temperature coefficient (typ. +0.04 %/°C). Its 200 mW power rating is derated linearly above 25°C ambient per Fig. 1.
The device features three-terminal SC-59 packaging with pin 1 unconnected (NC), pin 2 anode, and pin 3 cathode - enabling standard surface-mount placement while isolating unused terminal for layout flexibility. Peak reverse surge capability reaches 100 W for 10 μs pulses (tT).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.52–7.84 V at IZ = 5 mA - defines regulated output range for feedback or reference use |
| Dynamic Impedance (ZZ) | ≤30 Ω at IZ = 5 mA - ensures minimal voltage deviation under load transients |
| Power Dissipation (P) | 200 mW at TA = 25°C - sets maximum continuous DC power handling before thermal derating |
| Reverse Current (IR) | ≤2 μA at VR = 4.0 V - confirms low leakage below breakdown, critical for high-impedance bias networks |
| Junction Temperature (Tj) | −55 to +150°C - supports operation in extended industrial environments without external heatsinking |
| Package | SC-59 (JEITA) - 3-pin mini-mold SMT package with 2.8 × 1.5 mm footprint and 0.95 mm height |
| Surge Rating | 100 W peak reverse power (tT = 10 μs) - enables transient suppression in low-energy surge events |
Pinout & Package
RD7.5M-T2B-A is housed in a 3-pin SC-59 (JEITA) surface-mount package. Pin 1 is internally unconnected (NC); pin 2 is the anode (A); pin 3 is the cathode (K). The package features gull-wing leads, 0.65 mm pitch, and JEDEC-compliant marking orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Electrically isolated; no PCB trace required - simplifies routing and avoids accidental shorting |
| 2 | Anode (A) | Forward-biased terminal; connects to lower-potential node in zener-regulated circuits |
| 3 | Cathode (K) | Zener breakdown terminal; connects to higher-potential node and provides regulated voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| Planar process construction | Ensures consistent breakdown characteristics and long-term stability across production lots |
| E24-standard zener voltage | Enables direct substitution in legacy designs using common 7.5 V reference points |
| Low dynamic impedance (≤30 Ω) | Maintains regulation accuracy under varying load currents up to 5 mA |
| SC-59 package with NC pin | Reduces board area vs. DO-35 while allowing flexible layout where unused pin avoids routing conflict |
| 150°C max junction temperature | Supports operation in sealed enclosures or near heat-generating components without forced cooling |
Applications
| Power Supply Feedback | Voltage Reference |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener diode establishes precise 7.5 V reference at TL431 or optocoupler LED cathode to set output voltage threshold. Use Value: Tight 7.52–7.84 V tolerance and ≤30 Ω ZZ minimize output drift across line/load/temperature variations. |
Use Scenario: Providing stable bias voltage for analog comparators, ADC references, or sensor excitation in battery-powered instrumentation. IC Role / Device Role / Timing Role: Acts as low-power shunt reference replacing higher-cost IC references where ±5% accuracy suffices. Use Value: 2 μA leakage at 4.0 V ensures negligible current draw in high-impedance divider networks, extending battery life. |
| Waveform Clipping | Surge Absorption |
|
Use Scenario: Limiting signal amplitude in audio preamp stages or logic-level translation interfaces to prevent overvoltage damage. IC Role / Device Role / Timing Role: Shunt-connected between signal path and ground to clip positive excursions above ~7.5 V. Use Value: Fast response to transients (<10 ns typical) and 100 W surge rating handle repetitive clipping without degradation. |
Use Scenario: Protecting microcontroller I/O pins or sensor inputs from ESD or inductive kickback in motor drive or relay control boards. IC Role / Device Role / Timing Role: Placed cathode-to-rail, anode-to-ground to clamp reverse transients to safe levels. Use Value: 100 W/10 μs surge capability absorbs energy from typical 1 kV HBM ESD events without failure. |
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) | Same 7.5 V nominal, but 1 W power rating, DO-41 package, higher ZZ (≤19 Ω at 20 mA) | Requires larger PCB area and different thermal design; suited for higher-power regulation | Select when >200 mW dissipation or through-hole assembly is required |
| BZX55C7V5 (Vishay) | 7.5 V nominal, 500 mW rating, DO-35 package, ZZ ≤30 Ω at 5 mA, same SC-59 pinout not available | Higher power margin but incompatible SMT footprint; lacks NC pin configuration | Select when higher surge margin is needed and SC-59 is not mandatory |
Compared with 1N4734A and BZX55C7V5, RD7.5M-T2B-A offers optimized space efficiency via SC-59 packaging with NC pin, tighter voltage tolerance matching E24 standards, and verified 200 mW operation in compact industrial layouts - making it preferred for modern SMT power management where board area and thermal constraints are critical.
Availability
RD7.5M-T2B-A is available at Aetrix Electronics and suitable for industrial control systems, embedded power supplies, and sensor interface circuits requiring stable component supply and RoHS-compliant sourcing.
Supply support for RD7.5M-T2B-A 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 delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, and consumer applications.
The RD2.0M to RD47M series was designed specifically for cost-sensitive, space-constrained industrial and consumer voltage regulation and protection - emphasizing planar process consistency, JEDEC-standard SMT compatibility, and E24 voltage grading.
FAQ
What is the exact zener voltage range for RD7.5M-T2B-A at 5 mA test current?
The RD7.5M-T2B-A has a guaranteed zener voltage range of 7.52 V to 7.84 V when measured at IZ = 5 mA and TA = 25°C. This 4.7% tolerance aligns with E24 standard values and is confirmed in the Renesas D14716EJ7V0DS datasheet Table on page 3. The RD7.5M-T2B-A achieves this specification using planar silicon processing for batch consistency.
Does RD7.5M-T2B-A have a pin 1 connection, and what is its function?
No - pin 1 of the RD7.5M-T2B-A is internally unconnected (NC), as documented in the package diagram on page 2 of the Renesas datasheet. Pin 2 is the anode (A), and pin 3 is the cathode (K). This NC configuration allows simplified PCB routing and eliminates risk of misconnection in SC-59 layouts, distinguishing RD7.5M-T2B-A from dual-anode or dual-cathode variants.
What is the maximum allowable reverse current for RD7.5M-T2B-A at 4.0 V?
The RD7.5M-T2B-A exhibits a maximum reverse current (IR) of 2 μA when biased at VR = 4.0 V and TA = 25°C, per the Electrical Characteristics table on page 3 of the Renesas datasheet. This low leakage supports high-impedance voltage divider networks and minimizes standby power loss in battery-operated RD7.5M-T2B-A applications.
Can RD7.5M-T2B-A be used in surge protection circuits, and what is its peak pulse rating?
Yes - RD7.5M-T2B-A is rated for 100 W peak reverse surge power (PRSM) at tT = 10 μs, as specified in the Maximum Ratings table (page 2) and illustrated in Fig. 6 of the Renesas datasheet. This makes RD7.5M-T2B-A suitable for clamping low-energy transients such as ESD or inductive spikes in I/O protection circuits, provided average power remains within 200 mW limits.
Is RD7.5M-T2B-A compliant with RoHS and lead-free assembly requirements?
Yes - RD7.5M-T2B-A meets RoHS Directive 2011/65/EU requirements, as confirmed by Renesas Electronics' environmental compliance documentation. The device uses lead-free terminations compatible with standard reflow profiles (J-STD-020), and its SC-59 package is fully compatible with lead-free soldering processes without reliability degradation.
RD7.5M-T2B-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- SC-59
RD7.5M-T2B-A FAQ
1.How can I place an order for RD7.5M-T2B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD7.5M-T2B-A 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 RD7.5M-T2B-A reliable?
The price and inventory of RD7.5M-T2B-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD7.5M-T2B-A is usually 5 days.
3.What payment methods are accepted for RD7.5M-T2B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD7.5M-T2B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD7.5M-T2B-A?
RD7.5M-T2B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD7.5M-T2B-A 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 RD7.5M-T2B-A?
For technical support, including RD7.5M-T2B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD7.5M-T2B-A requirements.
6.How does Aetrix verify that RD7.5M-T2B-A is sourced from the original manufacturer or authorized distributors?
All RD7.5M-T2B-A 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 RD7.5M-T2B-A meets industry standards.
7.What is the process for return or replacement of RD7.5M-T2B-A?
All RD7.5M-T2B-A units undergo pre-shipment inspection (PSI). If there is an issue with RD7.5M-T2B-A, 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 RD7.5M-T2B-A part is unused and in its original packaging.
Return procedure for RD7.5M-T2B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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