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Renesas RD7.5M-T1B-A
- Part No.:
- RD7.5M-T1B-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
RD7.5M-T1B-A.pdf
- Description:
- RD7.5M - 200MW ZENER DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:135,000
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Product details
Overview
RD7.5M-T1B-A from Renesas Electronics is a 200 mW, 3-pin mini-mold planar zener diode with nominal zener voltage 7.5 V (±4.7% tolerance), dynamic impedance ≤30 Ω at 5 mA, and reverse current ≤2 μA at 4.0 V. It serves as a precision voltage reference or surge absorber in low-power analog signal conditioning and power rail stabilization circuits.
For engineers reviewing the RD7.5M-T1B-A datasheet, RD7.5M-T1B-A pinout, RD7.5M-T1B-A application, or RD7.5M-T1B-A equivalent, key selection criteria include its E24-standardized 7.5 V zener voltage, SC-59 package compatibility, 150°C junction temperature rating, and suitability for constant-voltage regulation in space-constrained consumer and industrial electronics.
Technical Context
This device operates as a silicon planar zener diode optimized for stable reverse-biased breakdown at 7.5 V under 5 mA test current. Its construction enables consistent voltage regulation across ambient temperatures up to 125°C, with a typical temperature coefficient of +0.04 %/°C near 7.5 V.
The RD7.5M-T1B-A features a three-terminal SC-59 (JEITA) package where Pin 1 is NC, Pin 2 is anode, and Pin 3 is cathode - enabling unidirectional voltage clamping and precise biasing in feedback networks of LDOs or op-amp references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 7.52–7.84 V at IZ = 5 mA - defines tight regulation window for ±4.7% tolerance reference design |
| Dynamic Impedance ZZ | ≤30 Ω at IZ = 5 mA - ensures minimal output voltage shift under load transients |
| Reverse Current IR | ≤2 μA at VR = 4.0 V - guarantees low leakage in high-impedance sensing nodes |
| Power Dissipation P | 200 mW at TA = 25°C - sets maximum continuous DC power handling in PCB-mounted operation |
| Junction Temperature Tj | −55 to +150°C - supports operation in extended-temperature industrial environments |
| Package | SC-59 (JEITA) - surface-mount 3-pin mini-mold footprint compatible with standard reflow profiles |
| Peak Reverse Power | 100 W for tT = 10 μs - enables transient surge suppression in ESD-critical interfaces |
Pinout & Package
RD7.5M-T1B-A uses the SC-59 (JEITA) 3-pin mini-mold package: compact surface-mount outline with 2.8 mm × 1.5 mm body, 0.95 mm lead pitch, and standardized marking orientation. Pin 1 is NC (no connection), Pin 2 is anode (A), Pin 3 is cathode (K).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Electrically isolated terminal - must remain unconnected in PCB layout to avoid parasitic coupling |
| 2 | Anode (A) | Forward-bias terminal - connects to lower-potential node when used in reverse-breakdown regulation |
| 3 | Cathode (K) | Zener breakdown terminal - connects to higher-potential node to establish regulated reference voltage |
Key Features
| Feature | Design Value |
|---|---|
| Planar process construction | Ensures repeatable breakdown characteristics and long-term stability under thermal cycling |
| E24-standardized zener voltage | Enables direct substitution within industry-standard resistor/voltage reference families |
| Low dynamic impedance (≤30 Ω) | Maintains regulation accuracy during fast load-current steps in feedback loops |
| SC-59 JEITA package | Supports automated pick-and-place assembly and achieves <1.0 mm profile height for ultra-thin designs |
| 150°C maximum junction temperature | Permits reliable operation in thermally dense layouts without derating below 125°C ambient |
Applications
| USB Port Voltage Clamp | Op-Amp Reference Divider |
|---|---|
Use Scenario: Clamping transient overvoltage on USB 2.0 D+/D− lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Zener clamp element placed between data line and ground to shunt surge energy before it reaches transceiver IC input stages. Use Value: Leverages 100 W peak reverse power rating and 4.0 V reverse leakage threshold to suppress >8 kV HBM ESD without degrading signal integrity. | Use Scenario: Providing stable 7.5 V reference for precision gain-setting resistors in instrumentation amplifier front-ends. IC Role / Device Role / Timing Role: Passive voltage reference node in high-impedance resistor divider network feeding op-amp non-inverting input. Use Value: Uses ≤2 μA reverse leakage and ≤30 Ω dynamic impedance to minimize offset drift and maintain <0.1% gain error over temperature. |
| LDO Feedback Node | Microcontroller Reset Circuit |
Use Scenario: Setting regulated output voltage of adjustable low-dropout regulator via external feedback divider. IC Role / Device Role / Timing Role: Zener-based reference replacing internal bandgap to enable non-standard output voltages (e.g., 7.5 V rail). Use Value: Delivers 7.52–7.84 V tolerance window and 0.04 %/°C tempco to hold LDO output within ±1.5% over −40 to +85°C. | Use Scenario: Generating clean, temperature-stable reset threshold for 3.3 V or 5 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Voltage-sensing element in RC-delayed reset generator that asserts reset until supply exceeds 7.5 V. Use Value: Relies on tight 7.5 V breakdown and low 2 μA leakage to ensure deterministic reset assertion timing independent of supply ramp rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C7V5 (ON Semiconductor) | Same 7.5 V nominal, 500 mW rating, DO-35 package - higher power but larger footprint | Preferred where board space allows and higher surge margin is required | Select when thermal dissipation >200 mW is needed; not drop-in due to DO-35 vs SC-59 mechanical mismatch |
| MMSZ5235B (Diodes Inc.) | 7.5 V nominal, 500 mW, SOD-123 package - same 3-pin form factor but different pinout (cathode-anode-NC) | Suitable for automated assembly but requires PCB layout revision for pin mapping | Choose for higher reliability screening or tighter AEC-Q200 compliance; verify cathode/anode assignment matches schematic |
Compared with BZX55C7V5 and MMSZ5235B, RD7.5M-T1B-A offers the smallest SC-59 footprint and lowest-profile mounting among 7.5 V zeners, making it optimal for ultra-compact consumer electronics where board area and height are constrained - though both alternatives provide higher power headroom at the cost of layout compatibility.
Availability
RD7.5M-T1B-A is available at Aetrix Electronics and suitable for USB interface protection, op-amp reference networks, LDO feedback circuits, and microcontroller reset generation requiring stable component supply and JEDEC-compliant packaging.
Supply support for RD7.5M-T1B-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and consumer markets.
The RD7.5M-T1B-A belongs to Renesas' legacy zener diode product line designed for precision voltage regulation and transient suppression in cost-sensitive, space-constrained electronic systems.
FAQ
What is the exact zener voltage range specified for RD7.5M-T1B-A at 5 mA test current?
The RD7.5M-T1B-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 Renesas document D14716EJ7V0DS, page 3. The RD7.5M-T1B-A's tight VZ spread supports accurate voltage referencing without post-manufacturing trimming.
Does RD7.5M-T1B-A have a no-connect (NC) pin, and how must it be handled in PCB layout?
Yes, RD7.5M-T1B-A Pin 1 is designated NC (no connection) per Renesas' SC-59 pinout definition. It must remain electrically unconnected on the PCB - neither routed nor soldered - to prevent unintended coupling or thermal stress. The RD7.5M-T1B-A's datasheet explicitly states Pin 1 is isolated, and connecting it risks parametric deviation or premature failure.
What is the maximum allowable reverse voltage before significant leakage occurs in RD7.5M-T1B-A?
The RD7.5M-T1B-A exhibits ≤2 μA reverse current at VR = 4.0 V, as specified in its electrical characteristics table. Below this voltage, leakage remains negligible; above it, current rises exponentially toward breakdown. This 4.0 V threshold defines the safe operating limit for blocking-mode applications - critical for RD7.5M-T1B-A use in high-impedance sensor biasing or standby power domains.
Can RD7.5M-T1B-A be used in place of a standard 1N4733A zener diode?
No - RD7.5M-T1B-A is not a functional replacement for 1N4733A. While both target ~7.5 V regulation, the 1N4733A is a 1 W, DO-41 device with different thermal behavior, impedance (≤15 Ω), and package. RD7.5M-T1B-A's 200 mW rating, SC-59 footprint, and 30 Ω ZZ require circuit-level validation. Substituting RD7.5M-T1B-A for 1N4733A may cause thermal overload or regulation inaccuracy unless power and layout constraints are fully reassessed.
What is the temperature coefficient of RD7.5M-T1B-A, and how does it affect voltage stability?
The RD7.5M-T1B-A has a typical temperature coefficient of +0.04 %/°C near its 7.5 V operating point, as shown in Figure 4 of Renesas' D14716EJ7V0DS. This means its zener voltage increases by approximately 3 mV per °C rise - a low-drift characteristic beneficial for stable references across −40°C to +85°C. For precision applications, this coefficient must be factored into total error budgets alongside RD7.5M-T1B-A's initial tolerance and dynamic impedance effects.
RD7.5M-T1B-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-T1B-A FAQ
1.How can I place an order for RD7.5M-T1B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD7.5M-T1B-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-T1B-A reliable?
The price and inventory of RD7.5M-T1B-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-T1B-A is usually 5 days.
3.What payment methods are accepted for RD7.5M-T1B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD7.5M-T1B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD7.5M-T1B-A?
RD7.5M-T1B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD7.5M-T1B-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-T1B-A?
For technical support, including RD7.5M-T1B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD7.5M-T1B-A requirements.
6.How does Aetrix verify that RD7.5M-T1B-A is sourced from the original manufacturer or authorized distributors?
All RD7.5M-T1B-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-T1B-A meets industry standards.
7.What is the process for return or replacement of RD7.5M-T1B-A?
All RD7.5M-T1B-A units undergo pre-shipment inspection (PSI). If there is an issue with RD7.5M-T1B-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-T1B-A part is unused and in its original packaging.
Return procedure for RD7.5M-T1B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD7.5M-T1B-A Tags
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