RD12S-A Renesas Electronics Integrated Circuit (Small Outline Diode) In Stock
The RD12S-A is a 12 V Zener diode from Renesas with a 0.2 W power dissipation rating, housed in a compact 2-pin Super MiniMold SMT package for voltage clamping and overvoltage protection in consumer and industrial circuits.
- Manufacturer
- Renesas Electronics
- Package
- Small Outline Diode
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- RD12S-A Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of RD12S-A?
- 12 V Zener breakdown voltage providing precise voltage clamping for overvoltage protection in signal lines
- 0.2 W power dissipation rating in a space-saving 2-pin Super MiniMold SMT package
- Surface-mount construction enables high-density PCB placement alongside SMD passives and ICs
- Low leakage current in reverse-bias for minimal power draw in battery-operated protection circuits
- Compatible with reflow soldering and tape-and-reel packaging for automated high-volume assembly
What is RD12S-A used for?
The RD12S-A Zener diode is used to clamp signal lines and rail voltages at 12 V in consumer electronics, set-top boxes, and low-power communication interfaces where transient overvoltage events must be suppressed. Its 0.2 W rating and compact Super MiniMold footprint allow it to fit alongside SMD components in tight PCB layouts without a thermal heatsink. Industrial sensor inputs and automotive accessory circuits also employ this device to protect MCU I/O pins from voltage excursions above 12 V.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the RD12S-A datasheet?
RD12S-A Datasheet DownloadOfficial datasheet from Renesas Electronics
What are equivalent replacements for RD12S-A?
Compatible alternatives and drop-in replacements for RD12S-A:
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Frequently Asked Questions
What is the Zener breakdown voltage and power rating of the RD12S-A, and what load conditions does it support?
The RD12S-A has a nominal Zener voltage of 12 V with a maximum continuous power dissipation of 0.2 W. At the rated 12 V clamp level, this limits steady-state Zener current to approximately 16 mA, making it suitable for signal-line clamping and low-current bias protection rather than high-power linear regulation.
How does the RD12S-A Super MiniMold package compare to a standard SOD-123 in PCB space requirements?
The Super MiniMold package is a compact 2-pin SMT outline similar in footprint to a SOD-323, measuring roughly 1.6 mm × 0.8 mm compared to the SOD-123's 3.5 mm × 1.5 mm body. This smaller profile allows the RD12S-A to be placed in high-density areas near IC I/O pins on boards where every mm² counts.
In which circuit positions does the RD12S-A provide effective overvoltage protection?
The RD12S-A is placed in shunt configuration—cathode toward the positive rail—across signal lines or power nodes that must not exceed 12 V. It clamps transients on RS-232 interfaces, sensor excitation lines, and GPIO protection networks where peak transient energy stays within the 0.2 W thermal budget and pulse duration is kept below 1 ms.
Can the RD12S-A be used in automotive accessory circuits, and what temperature range is supported?
The RD12S-A is suitable for 12 V automotive accessory circuits such as LED driver enable lines and CAN transceiver protection nodes where the nominal rail matches its 12 V Zener clamp. Renesas specifies storage and operating temperatures typical of -55°C to 150°C for this Super MiniMold package, covering both underhood and cabin environments in passenger vehicles.
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Why Buy from FindMyChip
About Renesas Electronics
Renesas Electronics is a Japanese semiconductor manufacturer specializing in microcontrollers, analog products, and SoC solutions for automotive, industrial, and IoT applications.
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