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Renesas RD5.1M-T1B-A
- Part No.:
- RD5.1M-T1B-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
RD5.1M-T1B-A.pdf
- Description:
- RD5.1M - ZENER DIODES 200 MW
- Quantity:
- Payment:
- Shipping:
Inventory:13,253
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Product details
Overview
RD5.1M-T1B-A from Renesas Electronics is a 200 mW, 5.1 V ±4.7% (B3 class) planar zener diode in SC-59 (JEITA) 3-pin mini-mold package, optimized for precision voltage reference and low-power surge suppression in consumer and industrial power rails. It delivers 5 Ω dynamic impedance at 5 mA, supports 5 μA reverse leakage at 1.5 V, and operates across −55°C to +150°C junction temperature range.
For engineers reviewing the RD5.1M-T1B-A datasheet, RD5.1M-T1B-A pinout, RD5.1M-T1B-A application, or RD5.1M-T1B-A equivalent, this part serves as a stable, low-noise voltage clamp in analog sensor biasing, microcontroller reset circuits, and I/O protection networks where tight tolerance and thermal stability are required.
Technical Context
This zener diode uses planar diffusion technology to achieve consistent breakdown characteristics and low dynamic impedance. Its B3 voltage class (5.14–5.37 V) ensures tighter regulation than standard B-class variants, with temperature coefficient minimized near 0 mV/°C in the 5–6 V range per typical γZ-VZ curves.
The device is rated for 100 W peak reverse power at 10 μs pulse width and exhibits 625°C/W transient thermal impedance at t = 1 ms. Its SC-59 package provides mechanical robustness and thermal performance suitable for reflow-soldered PCB applications in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.14–5.37 V at IZ = 5 mA - defines precise clamping threshold for 5 V rail stabilization |
| Dynamic Impedance (ZZ) | 130 Ω max at IZ = 5 mA - ensures minimal voltage shift under load transients |
| Reverse Leakage (IR) | 5 μA max at VR = 1.5 V - enables low-quiescent-current bias networks |
| Power Dissipation (P) | 200 mW at TA = 25°C - sets continuous DC power limit for thermal design |
| Junction Temperature (Tj) | −55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
| Peak Reverse Power (PRSM) | 100 W at tT = 10 μs - determines ESD/surge handling capability in I/O protection |
Pinout & Package
RD5.1M-T1B-A is housed in an SC-59 (JEITA) 3-pin mini-mold plastic package with standard lead pitch and coplanarity compliant with JEDEC TO-236AB. The package features molded epoxy body, gull-wing leads, and laser-marked polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Electrically isolated; must remain unconnected to avoid parasitic coupling or stress |
| 2 | Anode (A) | Forward-biased terminal; connects to lower-potential node in reverse-bias zener configuration |
| 3 | Cathode (K) | High-impedance reference node; ties to regulated output or protected signal line |
Key Features
| Feature | Design Value |
|---|---|
| E24 Standard Zener Voltage | Complies with IEC 60063 E24 series - simplifies BOM consolidation and inventory management |
| B3 Voltage Class Tolerance | ±2.2% nominal (5.14–5.37 V) - improves accuracy over generic B-class parts in feedback loops |
| Low Dynamic Impedance | 130 Ω max at 5 mA - maintains stable reference under varying load currents in LDO pre-regulators |
| Planar Process Construction | Enables reproducible breakdown voltage and reduced parameter drift over time and temperature |
| SC-59 Package Compatibility | Matches JEDEC TO-236AB footprint - supports automated placement and reflow without adapter tooling |
Applications
| Voltage Reference for Analog Sensors | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Providing stable 5.1 V reference for bridge-based pressure or temperature sensors in HVAC controllers. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, replacing higher-cost bandgap ICs in cost-sensitive designs. Use Value: Delivers <±2.2% initial tolerance and <0.05%/°C tempco in 5 V range - sufficient for 12-bit ADC accuracy without calibration. |
Use Scenario: Generating clean, glitch-free reset signal for 3.3 V microcontrollers during power-up and brownout events. IC Role / Device Role / Timing Role: Functions as precision clamp in RC-based reset generator, defining exact trip threshold. Use Value: 5 μA leakage at 1.5 V ensures rapid capacitor discharge; 130 Ω ZZ prevents noise-induced false resets. |
| I/O Line Surge Protection | Waveform Clipping in Signal Conditioning |
|
Use Scenario: Protecting UART or SPI lines from ESD and inductive kickback in industrial PLC modules. IC Role / Device Role / Timing Role: Shunt limiter absorbing transient energy before it reaches downstream logic inputs. Use Value: 100 W peak power rating at 10 μs enables compliance with IEC 61000-4-2 Level 4 (15 kV air) when combined with series impedance. |
Use Scenario: Limiting audio or sensor signal amplitude to prevent ADC saturation in portable instrumentation. IC Role / Device Role / Timing Role: Bidirectional clipper (with second diode) or unidirectional clamp in front-end analog stage. Use Value: Sharp knee at 5.1 V with 130 Ω ZZ ensures predictable clipping onset and minimal distortion below threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5231BS-7-F (Diodes Inc.) | 5.1 V, 200 mW, SOT-23, 100 Ω ZZ, 10 μA IR @ 3.8 V | Slightly higher leakage; same power rating and package footprint | Preferred where lower dynamic impedance is critical and 10 μA leakage is acceptable |
| BZX84-C5V1 (Nexperia) | 5.1 V, 250 mW, SOT-23, 60 Ω ZZ, 5 μA IR @ 2.0 V | Higher power rating and lower ZZ, but wider voltage tolerance (±5%) | Chosen when enhanced surge margin and tighter ZZ outweigh need for B3-class precision |
Compared with RD5.1M-T1B-A, MMBZ5231BS-7-F offers lower impedance but looser leakage control, while BZX84-C5V1 trades voltage precision for higher surge resilience and lower impedance - making each suitable for distinct trade-off priorities in power rail supervision versus signal clamping.
Availability
RD5.1M-T1B-A is available at Aetrix Electronics and suitable for voltage reference, reset generation, I/O protection, and waveform clipping applications requiring stable component supply and long-term obsolescence support.
Supply support for RD5.1M-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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The RD-series zener diodes were developed by Renesas (formerly NEC Electronics) for high-reliability, low-cost voltage regulation in consumer and industrial electronics - emphasizing process consistency, JEDEC-compliant packaging, and broad ambient temperature operation.
FAQ
What is the exact zener voltage tolerance of RD5.1M-T1B-A?
The RD5.1M-T1B-A has a B3-class zener voltage specification of 5.14 V minimum to 5.37 V maximum at 5 mA test current, corresponding to ±2.2% tolerance around the nominal 5.1 V rating. This tighter tolerance is confirmed in the "ELECTRICAL CHARACTERISTICS" table of Renesas document D14716EJ7V0DS, and distinguishes it from broader-tolerance B-class variants in the same RD-series family.
Is RD5.1M-T1B-A compatible with lead-free reflow soldering processes?
Yes, RD5.1M-T1B-A is qualified for lead-free reflow soldering per J-STD-020. Its SC-59 package withstands peak temperatures up to 260°C for 10 seconds, and the device meets RoHS Directive 2011/65/EU requirements as stated in Renesas environmental compliance documentation. No special pre-bake or moisture sensitivity level (MSL) handling is required beyond standard JEDEC MSL-1 guidelines.
Does RD5.1M-T1B-A have a specified temperature coefficient?
RD5.1M-T1B-A does not list a discrete temperature coefficient value in its datasheet, but Figure 3 ("γZ – VZ CHARACTERISTICS") shows typical temperature coefficients near 0 mV/°C for 5–6 V zeners, confirming minimal drift in this voltage range. This behavior is inherent to silicon planar zener construction and is validated across the B3 class group including RD5.1M-T1B-A.
Can RD5.1M-T1B-A be used in place of a 5.1 V TL431 shunt regulator?
No - RD5.1M-T1B-A is a passive two-terminal zener diode, whereas the TL431 is an active three-terminal programmable shunt regulator with adjustable output and higher accuracy. RD5.1M-T1B-A lacks the TL431's reference input, cathode/anode/gnd terminals, and 0.5% initial tolerance. It serves only fixed-voltage clamping, not precision regulation with external resistive feedback.
What is the meaning of the "-T1B-A" suffix in RD5.1M-T1B-A?
The "-T1B-A" suffix denotes tape-and-reel packaging per JEDEC standard: "T1" indicates 3000-unit reel quantity, "B" specifies embossed carrier tape per EIA-481, and "A" identifies the standard 8 mm tape width with 4 mm pocket depth. This packaging format ensures compatibility with high-speed pick-and-place equipment and is documented in Renesas ordering information for the RD-series.
RD5.1M-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
RD5.1M-T1B-A FAQ
1.How can I place an order for RD5.1M-T1B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD5.1M-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 RD5.1M-T1B-A reliable?
The price and inventory of RD5.1M-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 RD5.1M-T1B-A is usually 5 days.
3.What payment methods are accepted for RD5.1M-T1B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD5.1M-T1B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD5.1M-T1B-A?
RD5.1M-T1B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD5.1M-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 RD5.1M-T1B-A?
For technical support, including RD5.1M-T1B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD5.1M-T1B-A requirements.
6.How does Aetrix verify that RD5.1M-T1B-A is sourced from the original manufacturer or authorized distributors?
All RD5.1M-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 RD5.1M-T1B-A meets industry standards.
7.What is the process for return or replacement of RD5.1M-T1B-A?
All RD5.1M-T1B-A units undergo pre-shipment inspection (PSI). If there is an issue with RD5.1M-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 RD5.1M-T1B-A part is unused and in its original packaging.
Return procedure for RD5.1M-T1B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD5.1M-T1B-A Tags
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