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Renesas RD2.4M-T1B-A
- Part No.:
- RD2.4M-T1B-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
RD2.4M-T1B-A.pdf
- Description:
- DIODE ZENER 3-MINI MOLD
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
RD2.4M-T1B-A from Renesas Electronics is a 2.4 V, 200 mW planar zener diode in SC-59 (JEITA) 3-pin mini-mold package, rated for 5 mA test current with 2.30–2.60 V zener voltage tolerance, 100 Ω dynamic impedance, and 120 μA reverse leakage at 1.0 V, used for precision voltage reference and low-power surge suppression in consumer power rails.
For engineers reviewing the RD2.4M-T1B-A datasheet, RD2.4M-T1B-A pinout, RD2.4M-T1B-A application, or RD2.4M-T1B-A equivalent, this component serves as a stable, low-voltage shunt regulator in space-constrained analog circuits where tight VZ tolerance and thermal stability under 25°C ambient are critical selection criteria.
Technical Context
This zener diode operates in reverse breakdown mode with a nominal 2.4 V regulation point, designed for constant-voltage biasing and waveform clipping in low-current signal conditioning paths. Its planar construction ensures consistent junction characteristics and E24-standard voltage grading.
It exhibits a negative temperature coefficient near 2.4 V (≈ −0.04 %/°C), requiring thermal derating above 25°C ambient per the P–TA curve, and supports transient surge absorption up to 100 W for 10 μs pulses without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.30–2.60 V at IZ = 5 mA - defines usable regulation window for ±12.5% tolerance in low-voltage reference designs. |
| Power Dissipation (P) | 200 mW at TA = 25°C - sets maximum continuous DC power handling before thermal shutdown or parameter drift. |
| Dynamic Impedance (ZZ) | 100 Ω max at IZ = 5 mA - determines output voltage variation under load current changes; lower ZZ improves regulation accuracy. |
| Reverse Leakage (IR) | 120 μA max at VR = 1.0 V - indicates off-state conduction level; critical for low-power standby circuit integrity. |
| Junction Temperature (Tj) | 150°C maximum - constrains PCB layout thermal design and limits sustained operation in enclosed environments. |
| Package | SC-59 (JEITA) 3-pin mini-mold - surface-mount compatible with standard reflow profiles; pin 1 = NC, pin 2 = anode, pin 3 = cathode. |
Pinout & Package
RD2.4M-T1B-A uses the SC-59 (JEITA) 3-pin mini-mold package: compact 2.9 × 1.5 mm footprint with gull-wing leads, optimized for automated placement and high-density PCB layouts. Pin 1 is unconnected (NC); pin 2 is the anode; pin 3 is the cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Electrically isolated; must not be soldered or tied to any net to avoid parasitic coupling or mechanical stress. |
| 2 | Anode | Connected to lower-potential node (e.g., ground or return path) when used in reverse-biased zener configuration. |
| 3 | Cathode | Connected to regulated voltage node; polarity marking aligns with cathode band on physical device body. |
Key Features
| Feature | Design Value |
|---|---|
| Planar process construction | Ensures repeatable VZ distribution across production lots and long-term parametric stability under thermal cycling. |
| E24-standard zener voltage grading | Enables predictable binning and interchangeability within 5% voltage steps for cost-sensitive BOM consolidation. |
| 200 mW power rating at 25°C | Supports direct replacement of legacy 1/4 W through-hole zeners in SMT designs without board redesign. |
| Low 100 Ω dynamic impedance | Maintains <±10 mV output deviation under ±1 mA load transients-suitable for sensor bias and ADC reference stabilization. |
| 150°C maximum junction temperature | Allows operation in industrial ambient conditions up to 85°C with appropriate PCB copper area for heat spreading. |
Applications
| USB Peripheral Power Clamp | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamping 3.3 V USB VBUS line against ESD events and overvoltage spikes during hot-plug insertion. IC Role / Device Role / Timing Role: Shunt protection element placed between VBUS and GND, conducting only during transient overvoltage excursions. Use Value: Limits peak voltage to ≤2.6 V using its 2.60 V VZMAX, preventing damage to downstream USB PHY ICs rated for 3.6 V absolute maximum. |
Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers with internal brown-out detection disabled. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in discrete reset generator circuit. Use Value: Delivers 2.4 V ±0.15 V regulation at 5 mA, enabling reliable reset assertion at 2.3–2.6 V-matching typical MCU reset thresholds. |
| Low-Power Sensor Bias | Waveform Clipper in Audio Preamp |
|
Use Scenario: Providing stable bias voltage to analog-output temperature sensors operating from 3.3 V supply in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-current shunt regulator sourcing fixed 2.4 V to sensor VREF pin with minimal quiescent draw. Use Value: Draws only 120 μA at 1.0 V reverse bias in idle state, extending battery life while maintaining sensor accuracy within ±0.5% full-scale. |
Use Scenario: Limiting AC signal swing to ±2.4 V in microphone preamplifier input stage to prevent op-amp saturation. IC Role / Device Role / Timing Role: Bidirectional clipping diode pair (anode-to-anode or cathode-to-cathode) defining symmetrical hard-clipping threshold. Use Value: Achieves precise 2.4 V clipping level with <100 Ω dynamic impedance, minimizing harmonic distortion compared to resistor-diode limiter topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5222BS-7-F (Diodes Inc.) | 2.4 V nominal, 200 mW, SOT-323 package; 100 Ω ZZ, but 250 μA IR at 1.0 V. | Higher leakage reduces suitability in ultra-low-power sensor bias; identical VZ range enables drop-in use in clamping. | Select when SOT-323 footprint compatibility is required and leakage <200 μA is acceptable. |
| BZX84-C2V4 (Nexperia) | 2.4 V nominal, 300 mW, SOT-23 package; 100 Ω ZZ, but 100 μA IR at 1.0 V and wider VZ tolerance (2.2–2.6 V). | Higher power rating allows higher surge energy handling; looser tolerance affects precision reference accuracy. | Select when enhanced pulse robustness is needed and ±0.2 V VZ variation is tolerable in reset or clamp function. |
Compared with RD2.4M-T1B-A, MMBZ5222BS-7-F offers identical regulation voltage but higher leakage, while BZX84-C2V4 provides greater surge margin at the cost of VZ spread-making RD2.4M-T1B-A optimal for applications demanding tight 2.30–2.60 V control with minimal standby current.
Availability
RD2.4M-T1B-A is available at Aetrix Electronics and suitable for USB peripheral protection, microcontroller reset generation, low-power sensor biasing, and audio signal limiting requiring stable component supply and JEDEC-compliant SMT packaging.
Supply support for RD2.4M-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 global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and consumer systems.
The RD2.4M-T1B-A belongs to Renesas' legacy zener diode family designed for general-purpose voltage regulation and transient suppression in cost-sensitive, space-constrained electronics-targeting Standard-grade applications including office equipment, home appliances, and industrial controls.
FAQ
What is the exact zener voltage range for RD2.4M-T1B-A at 5 mA test current?
The RD2.4M-T1B-A has a guaranteed zener voltage range of 2.30 V to 2.60 V when measured at IZ = 5 mA and TA = 25°C, per the Renesas D14716EJ7V0DS datasheet. This ±0.15 V window reflects its Class B grading under the E24 standard and defines its usable regulation band in precision bias applications.
Does RD2.4M-T1B-A have a no-connect pin, and how should it be handled on the PCB?
Yes, RD2.4M-T1B-A has Pin 1 designated as No Connection (NC). It must remain electrically floating and unconnected on the PCB-neither tied to ground nor routed to any net. Soldering or bridging Pin 1 risks mechanical stress on the die bond wire and may induce parametric shift or premature failure.
Can RD2.4M-T1B-A be used in place of a 2.4 V Zener diode with different package type?
RD2.4M-T1B-A can replace other 2.4 V zeners only if the target application accepts SC-59 (JEITA) mechanical dimensions (2.9 × 1.5 mm) and pinout (Pin 2 = anode, Pin 3 = cathode). It is not pin-compatible with SOT-23 or SOT-323 devices due to differing terminal assignments and footprint geometry.
What is the maximum allowable reverse voltage before significant leakage occurs in RD2.4M-T1B-A?
Per the datasheet, RD2.4M-T1B-A specifies a maximum reverse current (IR) of 120 μA at VR = 1.0 V. Leakage remains below this threshold up to 1.0 V; beyond that, current rises exponentially toward the 2.30 V knee-so 1.0 V is the practical upper limit for negligible conduction in standby mode.
Is RD2.4M-T1B-A qualified for automotive applications?
No, RD2.4M-T1B-A is classified as a Standard-grade Renesas product intended for computers, office equipment, and consumer electronics-not automotive systems. It lacks AEC-Q101 qualification, extended temperature screening, or PPAP documentation required for vehicle-level deployment.
RD2.4M-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:
- 3-Mini Mold
RD2.4M-T1B-A FAQ
1.How can I place an order for RD2.4M-T1B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD2.4M-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 RD2.4M-T1B-A reliable?
The price and inventory of RD2.4M-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 RD2.4M-T1B-A is usually 5 days.
3.What payment methods are accepted for RD2.4M-T1B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD2.4M-T1B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD2.4M-T1B-A?
RD2.4M-T1B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD2.4M-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 RD2.4M-T1B-A?
For technical support, including RD2.4M-T1B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD2.4M-T1B-A requirements.
6.How does Aetrix verify that RD2.4M-T1B-A is sourced from the original manufacturer or authorized distributors?
All RD2.4M-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 RD2.4M-T1B-A meets industry standards.
7.What is the process for return or replacement of RD2.4M-T1B-A?
All RD2.4M-T1B-A units undergo pre-shipment inspection (PSI). If there is an issue with RD2.4M-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 RD2.4M-T1B-A part is unused and in its original packaging.
Return procedure for RD2.4M-T1B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD2.4M-T1B-A Tags
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