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:
suggested
suggested
suggested
suggested
suggested
suggested
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.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
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.
More from Renesas Electronics
R5F117AAGSP#30
Small Outline Packages
Integrated Circuit
R5F1177AGNA#U0
Quad Flat No-Lead
Integrated Circuit
R5F117BCGNA#20
Quad Flat No-Lead
Integrated Circuit
R5F117BCGFP#30
Quad Flat Packages
Integrated Circuit
R5F117ACGSP#30
Small Outline Packages
Integrated Circuit
R5F117BAGNA#20
Quad Flat No-Lead
Integrated Circuit
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit