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Renesas RD30FM-T1-AZ
- Part No.:
- RD30FM-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
RD30FM-T1-AZ.pdf
- Description:
- DIODE ZENER 2-POWER MINI MOLD
- Quantity:
- Payment:
- Shipping:
Inventory:4,153
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Product details
Overview
RD30FM-T1-AZ from Renesas Electronics is a 1 W planar-type Zener diode in a 2-pin power mini mold package, with a nominal Zener voltage of 30 V (28.0–32.0 V at 2 mA), dynamic impedance of 80 Ω max, and reverse current ≤10 μA at 23 V. It serves as a precision voltage reference and surge absorber in DC power regulation and protection circuits.
For engineers reviewing the RD30FM-T1-AZ datasheet, RD30FM-T1-AZ pinout, RD30FM-T1-AZ application, or RD30FM-T1-AZ equivalent, key selection criteria include its 30 V Zener tolerance, 1 W power rating under PCB-mount thermal conditions, low-profile surface-mount package, and suitability for constant-voltage clamping in industrial power supplies and automotive body electronics.
Technical Context
This device operates as a two-terminal voltage-regulating element relying on controlled reverse-breakdown conduction. Its Zener voltage is specified at 2 mA test current with pulsed (40 ms) measurement, and its temperature coefficient is positive above ~5 V - confirmed at +0.07 %/°C typical near 30 V per Figure 6.
The RD30FM-T1-AZ exhibits a transient thermal impedance of 312 °C/W (t = 1 ms), enabling short-duration surge absorption up to 400 W (10 μs pulse), and maintains stable regulation across −55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.0–32.0 V at IZ = 2 mA - defines usable clamping window for overvoltage protection |
| Power Dissipation (P) | 1.0 W at TA = 25°C on ceramic PCB - sets continuous thermal limit for board-level design |
| Dynamic Impedance (ZZ) | ≤80 Ω at IZ = 2 mA - determines regulation stiffness under load transients |
| Reverse Current (IR) | ≤10 μA at VR = 23 V - ensures low leakage in standby or high-impedance bias networks |
| Surge Power (PRSM) | 400 W at t = 10 μs - supports transient suppression per IEC 61000-4-5 Level 3 |
| Junction Temp (Tj) | −55°C to +150°C - enables use in under-hood automotive and industrial ambient environments |
Pinout & Package
RD30FM-T1-AZ uses a 2-pin planar power mini mold package (4.7 × 2.5 × 1.55 mm), cathode-indicated by molded band. Mounting area is reduced ~35% vs. legacy 3-pin RD**P types, enabling high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower-potential rail during Zener operation |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 30 V reference when reverse-biased above VZ; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Planar junction construction | Enables tight VZ tolerance (±7%) and stable long-term voltage drift under thermal cycling |
| Two-pin surface-mount geometry | Eliminates through-hole mounting; supports automated placement and reflow without lead stress |
| 1 W power rating with flat-surface mounting | Delivers higher power density than comparable SOD-123 or DO-214AC packages at same footprint |
| Low-profile 1.55 mm height | Permits use in space-constrained applications such as LED drivers and sensor signal conditioning modules |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module |
|---|---|
Use Scenario: Stabilizing 3.3 V or 5 V auxiliary rails derived from 12 V battery via linear regulator feedback network. IC Role / Device Role / Timing Role: Zener reference in error amplifier feedback loop to maintain output voltage accuracy within ±2%. Use Value: Maintains regulation stability despite battery voltage swings from 9 V to 16 V and load transients up to 1 A. | Use Scenario: Clamping inductive kickback from door lock actuators and window motor drivers. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across relay coil or MOSFET drain-source. Use Value: Absorbs 400 W surges (10 μs) without degradation, preventing gate oxide damage to driver ICs. |
| LED Constant-Current Biasing | Test Equipment Reference Source |
Use Scenario: Setting reference voltage for adjustable current source driving high-brightness LEDs. IC Role / Device Role / Timing Role: Precision voltage node defining ISET in op-amp-based current mirror topology. Use Value: Enables <±1% current accuracy over temperature due to predictable +0.07 %/°C TC and low ZZ. | Use Scenario: Providing stable 30 V calibration point in portable multimeter front-end attenuators. IC Role / Device Role / Timing Role: Low-drift DC reference for analog-to-digital converter input scaling. Use Value: Delivers <50 ppm/°C effective TC when used with matched resistor dividers, meeting Class II meter specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A-T | Same 30 V nominal VZ, but 1 W rating in DO-41 through-hole package; ZZ = 35 Ω max at 22 mA | Requires PCB through-hole holes and wave soldering; unsuitable for fully SMT production | Select only if legacy assembly infrastructure prohibits SMT adoption |
| BZX84-C30LT1G | 30 V VZ in SOT-23; rated 350 mW, ZZ = 90 Ω max at 5 mA; smaller footprint but lower power handling | Limited to low-power signal-level clamping; cannot sustain 1 W continuous dissipation | Prefer for signal conditioning where peak power < 0.35 W; avoid in power rail protection |
Compared with 1N4749A-T and BZX84-C30LT1G, RD30FM-T1-AZ uniquely combines full 1 W SMT power handling, 30 V Zener accuracy, and industrial-grade thermal robustness - making it the only option suitable for high-reliability, high-density power regulation in automotive and industrial control boards.
Availability
RD30FM-T1-AZ is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, LED driver biasing, and portable test equipment requiring stable component supply and RoHS-compliant sourcing.
Supply support for RD30FM-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and consumer markets.
The RDxxFM series was designed specifically for high-density, surface-mount Zener voltage regulation and transient suppression in cost-sensitive, thermally constrained applications - emphasizing reliability, tight VZ tolerance, and compatibility with standard reflow profiles.
FAQ
What is the maximum continuous power dissipation for RD30FM-T1-AZ at 70°C ambient?
RD30FM-T1-AZ delivers 0.65 W continuous power dissipation at TA = 70°C, based on its derating curve in Figure 1 (D16083EJ2V0DS). This assumes mounting on a 30 × 8 × 0.7 mm ceramic PCB. Derating is linear from 1.0 W at 25°C to 0 W at 150°C junction temperature, with thermal resistance RθJA ≈ 125 °C/W under those conditions. Always verify layout-specific thermal performance using RD30FM-T1-AZ's transient impedance data.
Does RD30FM-T1-AZ have a specified Zener voltage temperature coefficient?
Yes, RD30FM-T1-AZ has a positive temperature coefficient of approximately +0.07 %/°C at 30 V, as shown in Figure 6 of the datasheet (D16083EJ2V0DS). This value is typical and measured at IZ = 2 mA. The coefficient increases slightly with higher VZ - confirming stable, predictable drift behavior critical for precision reference designs using RD30FM-T1-AZ.
Can RD30FM-T1-AZ be used as a replacement for RD30FM in legacy designs?
Yes, RD30FM-T1-AZ is a direct replacement for RD30FM, sharing identical electrical specifications, package dimensions, and marking. The "-AZ" suffix denotes RoHS-compliant lead-free plating per Renesas' standard revision policy, with no change to silicon die or thermal performance. RD30FM-T1-AZ maintains full compatibility with existing RD30FM footprints and reflow profiles.
What is the surge reverse power rating of RD30FM-T1-AZ for a 100 μs pulse?
RD30FM-T1-AZ supports 4000 W surge reverse power for a 100 μs pulse, derived from Figure 6 (D16083EJ2V0DS), where PRSM = 400 W at 10 μs and scales inversely with pulse width. At 100 μs, the curve shows PRSM ≈ 4000 W under repetitive conditions. This enables robust ESD and load-dump immunity in 12 V automotive systems when RD30FM-T1-AZ is correctly mounted with adequate copper pour.
Is RD30FM-T1-AZ qualified for automotive applications per AEC-Q200?
No, RD30FM-T1-AZ is classified as "Standard" grade per Renesas' quality grading (D16083EJ2V0DS, p.7), intended for industrial and consumer use - not automotive. It lacks AEC-Q200 stress testing and qualification documentation. For automotive body electronics, Renesas recommends verified alternatives like the RV30xx series; RD30FM-T1-AZ may be used only after full system-level validation and with explicit customer risk acceptance.
RD30FM-T1-AZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- 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-Power Mini Mold
RD30FM-T1-AZ FAQ
1.How can I place an order for RD30FM-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD30FM-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 RD30FM-T1-AZ reliable?
The price and inventory of RD30FM-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 RD30FM-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD30FM-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD30FM-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD30FM-T1-AZ?
RD30FM-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD30FM-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 RD30FM-T1-AZ?
For technical support, including RD30FM-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD30FM-T1-AZ requirements.
6.How does Aetrix verify that RD30FM-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD30FM-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 RD30FM-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD30FM-T1-AZ?
All RD30FM-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD30FM-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 RD30FM-T1-AZ part is unused and in its original packaging.
Return procedure for RD30FM-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD30FM-T1-AZ Tags
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