The Renesas R2S30402NP#W00-Z is a compact power management or interface device supplied in a SOT23-6 surface-mount package, designed for space-constrained applications where board real estate and low-profile assembly are design priorities. This active-status component from Renesas—a recognized supplier in power management, analog, and mixed-signal ICs—addresses the needs of modern portable electronics, IoT edge nodes, wearables, and battery-operated systems where PCB footprint reduction directly impacts product miniaturization and cost efficiency.
The SOT23-6 form factor provides six pins in a standardized small-outline transistor package, enabling dual-channel or multi-function integration within approximately 3.0 × 2.9 mm board space. This pin count supports common topologies such as dual LDO regulators, voltage supervisors with enable control, load switches with fault protection, or level shifters with direction control, making it suitable for power sequencing, voltage translation, and intelligent power distribution in multi-rail systems. The device operates across typical supply voltage ranges found in 1.8 V to 5.5 V logic and analog circuits, with output current or switching capabilities scaled to the thermal limits of the SOT23-6 package—typically in the range of tens to hundreds of milliamps for linear regulators, or low-resistance switching for load management functions.
Renesas positions this part for applications requiring reliable performance under variable load conditions, low quiescent current to extend battery runtime, and integrated protection features such as overcurrent limiting, thermal shutdown, or undervoltage lockout. The package supports standard reflow soldering profiles compatible with lead-free RoHS assembly processes, and the small footprint allows dense placement near point-of-load requirements, reducing trace inductance and voltage droop in noise-sensitive analog front-ends or RF sections.
Integration of the R2S30402NP#W0-Z into handheld medical devices, wireless sensor modules, consumer audio peripherals, and industrial telemetry units benefits from the thermal performance and moisture sensitivity level inherent to the SOT23-6 package, which balances heat dissipation with compact dimensions. Design engineers selecting this component gain access to Renesas technical resources, application notes on thermal management and layout best practices, and supply chain availability that supports both prototyping and volume production schedules. The active product status and broad availability ensure long-term design-in confidence for products with extended lifecycle requirements.
Replacement Planning for Renesas R2S30402NP#W00Z in Compact Li-ion Protection Designs
Renesas R2S30402NP#W00Z is typically considered when a small battery-powered product needs a compact protection IC in a 6-pin package. Replacement searches usually begin when the original device is constrained by lead time, allocation, BOM consolidation, lifecycle planning, or second-source qualification. The challenge is that battery protection ICs are not interchangeable only by package size; overcharge voltage, overdischarge voltage, overcurrent detection, delay timing, quiescent current, FET-drive behavior, and pin assignment all affect system safety and functional compatibility.
Candidate equivalent and alternative part numbers commonly reviewed for this type of replacement include:
| Replacement Category | Candidate Part Number | Manufacturer | Replacement Position |
|---|---|---|---|
| Exact replacement | R2S30402NP#W00Z | Renesas | Preferred when no design change is acceptable |
| Same-function alternative | S-8261A Series, such as S-8261AABMD-G2B-T2 | ABLIC | Single-cell Li-ion protection IC family; suffix must match thresholds |
| Same-function alternative | R5460N Series, such as R5460N208AA-TR-FE | Nisshinbo Micro Devices / Ricoh | Compact Li-ion protection IC family with multiple voltage options |
| Cost-sensitive alternative | DW01A-G | Fortune Semiconductor / compatible suppliers | Widely used single-cell Li-ion protection IC; requires careful validation |
| Higher-integration alternative | BQ29700DSER / BQ29702DSER | Texas Instruments | Modern Li-ion protection IC; package and threshold differences must be checked |
These devices should be treated as replacement candidates, not automatic drop-in equivalents. The safest workflow is to confirm the Renesas R2S30402NP#W00Z electrical thresholds, package drawing, pinout, external MOSFET topology, and timing requirements before approving any alternate part number.
What Renesas R2S30402NP#W00Z Defines in the Original Circuit
The supplied product data identifies R2S30402NP#W00Z as an active Renesas device with “UP SOT23-6” information and a QFN package reference in the listing. Because small protection IC listings can mix supplier package labels, the package drawing and land pattern should be verified from the original datasheet or approved drawing before selecting an alternative.
| Evaluation Area | Renesas R2S30402NP#W00Z Consideration | Replacement Impact |
|---|---|---|
| Function class | Compact battery protection IC, typically used with external charge/discharge MOSFETs | Alternative must match protection function, not only package size |
| Package / case | Listed as UP SOT23-6; listing also references QFN | PCB footprint must be verified before assuming pin-to-pin compatibility |
| Pin count | 6-pin device class | Pin order, NC pins, VM/CS pins, and FET gate outputs must be checked |
| Product status | Active | Exact replacement may be preferred for existing production |
| External circuit dependency | Usually works with sense resistors, MOSFETs, and cell terminals | Replacement may require different resistor values, delay capacitors, or FET gate configuration |
| Battery protection parameters | Overcharge, overdischarge, overcurrent, short-circuit detection, and release behavior are suffix-dependent | Matching thresholds is often more important than matching the package |
| Operating current | Low standby current is expected in battery protection applications | Higher current alternatives may reduce storage life or standby runtime |
The original Renesas R2S30402NP#W00Z should be evaluated as part of the full protection circuit. In a single-cell Li-ion pack, the IC does not work alone; it coordinates with external MOSFETs to disconnect charge or discharge paths when abnormal voltage or current conditions occur. A replacement that has the same nominal function but different detection delay, release voltage, or MOSFET-drive polarity can cause premature cutoff, delayed protection, charging incompatibility, or failure to recover after protection events.
Typical application scenarios include:
| Application Scenario | Why R2S30402NP#W00Z-Type Devices Are Used | Replacement Decision Factor |
|---|---|---|
| Single-cell Li-ion battery packs | Provides overcharge, overdischarge, and current protection in a compact footprint | Match protection thresholds to cell chemistry and charger profile |
| Portable consumer electronics | Low-current protection supports long standby time | Compare quiescent current and leakage behavior |
| Handheld instruments | Compact package supports dense PCB layouts | Confirm footprint and pinout before layout reuse |
| Rechargeable modules | Protects the cell during charge/discharge cycles | Validate MOSFET compatibility and recovery behavior |
Candidate Replacement Components for Renesas R2S30402NP#W00Z
The following table compares realistic replacement candidates for Renesas R2S30402NP#W00Z. Exact electrical values vary by suffix, so the listed part numbers should be checked against the required detection voltages, timing, package, and qualification needs before substitution.
| Manufacturer | Part Number | Key Specifications | Product Features | Typical Applications | Why It Can Replace the Original Part | Main Differences or Limitations | Recommended Usage |
|---|---|---|---|---|---|---|---|
| Renesas | R2S30402NP#W00Z | 6-pin compact protection IC; active product status; listed as UP SOT23-6/QFN in supplier data | Original Renesas device; known BOM item; no circuit redesign when sourced from approved stock | Existing Li-ion battery protection circuits and legacy production builds | It is the exact manufacturer part number, so it preserves the approved electrical and mechanical design when authentic stock is used | Availability, packaging format, and traceability must be confirmed; package description should be verified due listing inconsistency | First choice for production continuity, repairs, and no-change replacement |
| ABLIC | S-8261AABMD-G2B-T2 / S-8261A Series | Single-cell Li-ion battery protection IC family; multiple overcharge/overdischarge voltage options; SOT-23-6 style variants available | Low-current operation, overcharge detection, overdischarge detection, discharge overcurrent detection, charge control output, discharge control output | Battery packs, portable devices, rechargeable modules | Functionally similar protection architecture can support the same type of external MOSFET battery protection circuit | Suffix defines voltage thresholds and delay times; pinout may not match Renesas; external component values may need adjustment | Suitable when exact Renesas stock is limited and a controlled qualification cycle is possible |
| Nisshinbo Micro Devices / Ricoh | R5460N208AA-TR-FE / R5460N Series | Single-cell Li-ion protection IC family; compact 6-pin package options; suffix-dependent detection voltages | Overcharge, overdischarge, overcurrent, and short-circuit protection; low supply current variants | Compact battery packs, cordless products, portable electronics | Similar single-cell protection function makes it a practical candidate for second-source evaluation | Detection accuracy, recovery conditions, and pin assignment must be compared with R2S30402NP#W00Z | Good option when a Japanese-source alternative is preferred and electrical thresholds are available |
| Fortune Semiconductor | DW01A-G | Widely used single-cell Li-ion protection IC; commonly paired with dual MOSFET devices | Basic overcharge, overdischarge, overcurrent, and short-circuit protection; broad market availability | Low-cost consumer battery packs and modules | Can provide the same general protection function in cost-sensitive applications | Threshold tolerance, supplier variation, counterfeit risk, and qualification consistency require attention; may not be pin-compatible | Consider for redesigns, non-safety-sensitive consumer products, or cost-driven builds after validation |
| Texas Instruments | BQ29700DSER / BQ29702DSER | Single-cell Li-ion secondary protection IC family; small WSON package; voltage options depend on suffix | Precise protection thresholds, low current, modern TI support ecosystem | Compact rechargeable products, high-reliability portable systems | Offers similar protection objectives with strong documentation and supply-chain support | Usually not a direct SOT23-6 drop-in; PCB layout change may be required; threshold variant must be selected carefully | Best for new PCB revisions or redesigns where reliability documentation and long-term sourcing matter |
Among these candidates, Renesas R2S30402NP#W00Z remains the lowest-risk option for an existing board. ABLIC S-8261AABMD-G2B-T2 and Nisshinbo R5460N208AA-TR-FE are closer functional alternatives when the goal is to preserve a conventional single-cell Li-ion protection architecture. DW01A-G is often reviewed where cost and availability dominate, but it needs stronger incoming quality controls. Texas Instruments BQ29700DSER or BQ29702DSER is better suited to redesigns because mechanical compatibility is less likely.
Engineering Trade-Offs When Comparing R2S30402NP#W00Z Alternatives
Replacement approval should compare the parts from the circuit perspective rather than from a generic datasheet checklist. The table below summarizes the practical trade-offs between Renesas R2S30402NP#W00Z and the main alternative part numbers.
| Decision Factor | R2S30402NP#W00Z | S-8261AABMD-G2B-T2 / S-8261A Series | R5460N208AA-TR-FE / R5460N Series | DW01A-G | BQ29700DSER / BQ29702DSER |
|---|---|---|---|---|---|
| Electrical compatibility | Highest when replacing the same approved Renesas part | Potentially strong if threshold suffix matches | Potentially strong if selected voltage option matches | Functionally similar but threshold and tolerance must be reviewed | Strong protection function but variant selection is required |
| Mechanical compatibility | Best if package and supplier packaging match the original board | May fit similar 6-pin layouts, but pinout must be verified | May fit compact layouts, but not guaranteed drop-in | Often SOT23-6 class, but board-level pin mapping must be checked | Usually requires layout review due WSON package |
| Protection threshold matching | Preserves original behavior | Depends on exact suffix | Depends on exact suffix | May differ from original Renesas behavior | Depends on selected BQ297xx variant |
| MOSFET drive behavior | Already validated in the original circuit | Must confirm CO/DO output polarity and drive levels | Must confirm gate-drive behavior and recovery logic | Requires checking with existing dual MOSFET arrangement | Requires checking output structure and recommended application circuit |
| Timing behavior | Original delay timing remains unchanged | Delay timing may differ by variant | Delay timing may differ by variant | Often less configurable and may vary by supplier | Well documented but may not match original timing |
| Reliability and sourcing | Best for no-change builds if authentic stock is available | Good for qualified second source | Good for qualified second source | Availability is broad, but supplier control matters | Strong documentation and lifecycle support |
| PCB redesign need | None when exact part and package are confirmed | Possible if pinout differs | Possible if pinout differs | Possible despite similar package | Likely for existing SOT23-6 designs |
| Cost considerations | Depends on Renesas stock and market availability | Moderate; varies by suffix and channel | Moderate; varies by suffix and channel | Often cost-attractive | May be higher but supported by documentation |
| Best-fit scenario | Existing production, repair, and form-fit-function replacement | Second-source qualification with controlled testing | Alternative sourcing with similar architecture | Cost-sensitive redesigns after validation | New revision or reliability-focused redesign |
| Main limitation | Availability or package-listing inconsistency | Suffix complexity and pinout verification | Suffix complexity and pinout verification | Consistency, tolerance, and counterfeit control | Not usually a direct mechanical substitute |
A practical replacement sequence is to first secure Renesas R2S30402NP#W00Z if the existing PCB, firmware assumptions, charger behavior, and safety testing must remain unchanged. If exact stock is limited, ABLIC S-8261AABMD-G2B-T2 and Nisshinbo R5460N208AA-TR-FE are logical next candidates because they belong to comparable single-cell Li-ion protection IC families. DW01A-G can be reviewed where cost and availability outweigh direct equivalence, while Texas Instruments BQ29700DSER or BQ29702DSER is more appropriate when a PCB revision is already planned.
Before approving any R2S30402NP#W00Z replacement, compare the original and candidate datasheets for pinout, package drawing, overcharge detection voltage, overdischarge detection voltage, overcurrent threshold, short-circuit response, delay timing, release conditions, operating current, and MOSFET compatibility. For quotation and sourcing support for Renesas R2S30402NP#W00Z replacement parts, request pricing through IC-Components.com or email Info@IC-Components.com.
