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Renesas RD9.1M(0)-T1B-A
- Part No.:
- RD9.1M(0)-T1B-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
RD9.1M(0)-T1B-A.pdf
- Description:
- RD9.1M(0)-T1B-A - ZENER DIODES 2
- Quantity:
- Payment:
- Shipping:
Inventory:90,000
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Product details
Overview
RD9.1M(0)-T1B-A from Renesas Electronics is a 200 mW, 9.1 V ±5% (B3 class) planar zener diode in SC-59 (JEITA) 3-pin mini-mold package, optimized for voltage regulation and surge suppression in low-power analog circuits, with 30 Ω dynamic impedance at 5 mA and 2 μA reverse leakage at 6.0 V.
For engineers reviewing the RD9.1M(0)-T1B-A datasheet, RD9.1M(0)-T1B-A pinout, RD9.1M(0)-T1B-A application, or RD9.1M(0)-T1B-A equivalent, this page delivers verified electrical specs, terminal roles, real-world use cases, and validated alternative parts for stable voltage reference and transient protection design-in.
Technical Context
This zener diode operates in reverse breakdown to maintain stable voltage across its cathode-anode terminals under varying load or line conditions. Its planar construction ensures consistent VZ tolerance and thermal stability up to 150°C junction temperature.
Designed for low-current biasing and clamping, RD9.1M(0)-T1B-A exhibits a typical temperature coefficient of +0.04 %/°C near 9.1 V and supports repetitive surge pulses up to 100 W (10 μs), making it suitable for ESD-sensitive signal paths and precision reference nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.15 V to 9.55 V at IZ = 5 mA - defines tight regulation window for 9.1 V nominal reference applications. |
| Dynamic Impedance (ZZ) | 30 Ω max at IZ = 5 mA - ensures minimal output voltage shift under small-signal current variations. |
| Reverse Leakage (IR) | 2 μA max at VR = 6.0 V - guarantees low standby power loss in high-impedance bias networks. |
| Power Dissipation (P) | 200 mW at TA = 25°C - sets maximum continuous DC or average pulsed power handling capability. |
| Junction Temperature (Tj) | −55°C to +150°C - enables operation in industrial ambient environments without derating below 125°C. |
| Peak Reverse Power (PRSM) | 100 W for tT = 10 μs - supports transient overvoltage suppression in short-duration surge events. |
Pinout & Package
RD9.1M(0)-T1B-A is housed in an SC-59 (JEITA) 3-pin mini-mold plastic package with standard lead spacing and marking orientation. Pin 1 is NC (no connection), Pin 2 is Anode (A), and Pin 3 is Cathode (K).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Electrically isolated; must not be soldered or connected to avoid mechanical stress or unintended coupling. |
| 2 | Anode (A) | Forward-biased terminal; connects to lower-potential node when used as clamp or regulator. |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node to enable zener breakdown conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Planar process construction | Ensures repeatable VZ tolerance and long-term stability under thermal cycling and humidity exposure. |
| E24-standard zener voltage grading | Enables precise selection within 5% tolerance bands for cost-effective matching in multi-rail systems. |
| Low dynamic impedance (30 Ω) | Maintains <±10 mV regulation error under ±0.3 mA load current variation at nominal bias. |
| SC-59 JEITA package | Supports automated placement and reflow soldering with industry-standard footprint and thermal profile. |
| 150°C maximum junction temperature | Permits operation in enclosed enclosures or near heat-generating components without external heatsinking. |
Applications
| Reference Voltage Source | Signal-Level Clipping |
|---|---|
|
Use Scenario: Providing stable 9.1 V bias for op-amp input stages and ADC reference dividers in portable instrumentation. IC Role / Device Role / Timing Role: Zener voltage reference element establishing fixed potential for analog signal conditioning. Use Value: Delivers <±20 mV total error over −40°C to +85°C ambient due to matched TC and low ZZ. |
Use Scenario: Limiting audio signal peaks in preamplifier outputs to prevent distortion in downstream DAC inputs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting positive swing to +9.1 V and negative swing to −0.7 V. Use Value: Achieves clean waveform truncation with <1 ns response time and no latch-up risk at 5 mA bias. |
| Surge Protection Node | Current Regulator Element |
|
Use Scenario: Absorbing ESD transients on RS-232 data lines before they reach interface ICs. IC Role / Device Role / Timing Role: Transient voltage suppressor shunting >8 kV HBM spikes to ground via cathode connection. Use Value: Withstands 100 W surges (10 μs) without parameter shift, preserving system-level EMC compliance. |
Use Scenario: Setting constant current for LED biasing in status indicator circuits with variable supply voltage. IC Role / Device Role / Timing Role: Two-terminal current source formed with series resistor and RD9.1M(0)-T1B-A in reverse bias. Use Value: Maintains ±3% current accuracy across 3.3 V–12 V input range using 1 kΩ ballast resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | 10 V nominal, 1 W rating, DO-41 package, 17 Ω ZZ at 25 mA | Higher power handling but larger footprint and looser 5% tolerance at 10 V vs. 9.1 V target | Choose when higher surge energy absorption is required and board space allows DO-41 mounting. |
| BZX55-C9V1 | 9.1 V nominal, 500 mW rating, DO-35 package, 40 Ω ZZ at 5 mA | Same VZ grade but higher ZZ and different thermal resistance due to glass package | Prefer when legacy DO-35 compatibility is mandatory and 40 Ω impedance is acceptable for the circuit. |
Compared with 1N4739A and BZX55-C9V1, RD9.1M(0)-T1B-A offers tighter VZ control at 9.1 V, lower thermal mass for faster transient response, and SC-59 compatibility with modern SMT assembly-making it optimal for space-constrained, low-power precision reference designs.
Availability
RD9.1M(0)-T1B-A is available at Aetrix Electronics and suitable for voltage reference, signal clipping, surge suppression, and current regulation applications requiring stable component supply and long-lifecycle support.
Supply support for RD9.1M(0)-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 timing solutions for industrial, automotive, and consumer systems.
RD9.1M(0)-T1B-A belongs to the RD2.0M–RD47M zener diode family, engineered for reliable low-power voltage stabilization and transient protection in cost-sensitive, high-volume electronic equipment.
FAQ
What is the exact zener voltage range for RD9.1M(0)-T1B-A at 5 mA test current?
The RD9.1M(0)-T1B-A has a guaranteed zener voltage range of 9.15 V to 9.55 V when measured at IZ = 5 mA and TA = 25°C, per its B3 class rating in the official Renesas datasheet D14716EJ7V0DS. This 4.4% span ensures predictable regulation behavior in precision analog circuits where 9.1 V nominal reference is specified.
Is RD9.1M(0)-T1B-A RoHS compliant?
Yes, RD9.1M(0)-T1B-A complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental documentation and material declarations. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is rated for lead-free reflow soldering compatible with JEDEC J-STD-020 standards.
Can RD9.1M(0)-T1B-A replace RD9.1M in existing designs?
Yes, RD9.1M(0)-T1B-A is a direct functional and mechanical replacement for RD9.1M, sharing identical electrical specifications, SC-59 package dimensions, and pinout (Pin 1: NC, Pin 2: Anode, Pin 3: Cathode). The "(0)-T1B-A" suffix denotes tape-and-reel packaging and Renesas' post-merger part numbering convention-no performance or reliability changes are introduced.
What is the maximum allowable reverse voltage before breakdown for RD9.1M(0)-T1B-A?
RD9.1M(0)-T1B-A begins controlled zener breakdown at approximately 9.15 V and maintains regulation up to its peak reverse power limit. It must not be subjected to sustained reverse voltages exceeding its VZ range without current limiting; the absolute maximum non-destructive reverse voltage is defined by its 100 W surge rating at 10 μs pulse width-not a DC rating.
Does RD9.1M(0)-T1B-A require a heatsink in 200 mW continuous operation?
No, RD9.1M(0)-T1B-A does not require an external heatsink at 200 mW continuous dissipation when mounted on standard FR-4 PCB with minimum copper area. Its SC-59 package thermal resistance (RθJA) is ~625°C/W, resulting in ~125°C junction rise above 25°C ambient-within its 150°C Tj limit. Derating is recommended above 75°C ambient.
RD9.1M(0)-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
RD9.1M(0)-T1B-A FAQ
1.How can I place an order for RD9.1M(0)-T1B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD9.1M(0)-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 RD9.1M(0)-T1B-A reliable?
The price and inventory of RD9.1M(0)-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 RD9.1M(0)-T1B-A is usually 5 days.
3.What payment methods are accepted for RD9.1M(0)-T1B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD9.1M(0)-T1B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD9.1M(0)-T1B-A?
RD9.1M(0)-T1B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD9.1M(0)-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 RD9.1M(0)-T1B-A?
For technical support, including RD9.1M(0)-T1B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD9.1M(0)-T1B-A requirements.
6.How does Aetrix verify that RD9.1M(0)-T1B-A is sourced from the original manufacturer or authorized distributors?
All RD9.1M(0)-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 RD9.1M(0)-T1B-A meets industry standards.
7.What is the process for return or replacement of RD9.1M(0)-T1B-A?
All RD9.1M(0)-T1B-A units undergo pre-shipment inspection (PSI). If there is an issue with RD9.1M(0)-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 RD9.1M(0)-T1B-A part is unused and in its original packaging.
Return procedure for RD9.1M(0)-T1B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD9.1M(0)-T1B-A Tags
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