TCKE712BNLRF - 13.2V 3.65A eFuse IC | Toshiba | Circuit Protection
MPN: TCKE712BNLRF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.81 | $0.81 |
| 10 | $0.76 | $7.60 |
| 100 | $0.68 | $68.00 |
| 500 | $0.61 | $305.00 |
| 1,000 | $0.55 | $550.00 |
TCKE712BNLRF Overview
An eFuse IC is a type of circuit protection IC - within the power management IC hierarchy - that combines the function of a fuse, hot-swap controller, and power switch in a single device. Unlike a one-time polyfuse or blade fuse, an eFuse can disconnect a load within microseconds when an overcurrent or overvoltage event occurs, then either latch off or automatically retry, depending on the variant. This makes eFuses the preferred protection element at the input of distributed power rails in servers, storage systems, and IoT equipment.
Key features of the TCKE712BNL include a wide 4.4V to 13.2V operating input range that covers 5V and 12V rails, a low 53 mOhm RON per the Toshiba product page (Mouser lists 56 mOhm), integrated overcurrent protection with a current limit around the 3.65A class per Toshiba (5A per the Mouser listing), and built-in Flag output and RCB (rapid cycle bypass / control) functionality indicated by the B suffix. These features reduce external component count versus discrete fuse-and-controller solutions.
Architecturally, the device integrates a sense element and control logic that monitors load current and input voltage, driving the internal MOSFET gate to clamp or disconnect the rail during fault conditions. The Flag pin reports fault status to a host controller for system-level diagnostics, while the controlled startup behavior limits inrush current into large downstream bulk capacitors during hot-plug events.
Typical applications include server and storage backplane power-rail protection, consumer equipment DC input protection, IoT device power entry circuits, and general-purpose 5V/12V supply supervision - anywhere a fast, resettable, diagnostics-capable fuse is required.
Design consideration: power dissipation equals I^2 x RON; at 3.65A the device dissipates roughly 0.75W (estimated from 53 mOhm), so PCB copper area on the exposed pad must be sized for thermal relief.
This page synthesizes distributor pricing, verified datasheet parameters, and practical protection-design guidance not found in the raw manufacturer listing.
Drop-in alternatives for TCKE712BNLRF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TCKE712ANL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TCKE712BNLRF Specifications
| Product Type | eFuse IC (electronic fuse) |
| Input Voltage Range | 4.4 V to 13.2 V |
| Current Rating | 3.65 A (Toshiba product page); 5 A (Mouser listing) |
| On-Resistance (RON) | 53 mOhm (Toshiba); 56 mOhm (Mouser) |
| Protection Features | Overcurrent protection, Flag output, RCB (B-type feature set) |
| Package | 10-WSONB (3x3 mm), WSON10 |
| Mounting Type | Surface Mount |
| Packaging | Tape and Reel (,RF suffix) |
| Applications | Consumer equipment, Server, IoT equipment, Storage, General purpose power supply |
| Maximum Input Voltage | 13.2 V |
| Minimum Input Voltage | 4.4 V |
| Hot Swap Function | Yes (hot swap voltage controller per Mouser categorization) |
TCKE712BNLRF 10-wsonb (3x3 mm), wson10 Pin Configuration Guide
Pin configuration for TCKE712BNLRF (10-wsonb (3x3 mm), wson10 package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TCKE712BNLRF.
Refer to the datasheet for full pin configuration.
Typical Applications
TCKE712BNLRF is suitable for 6 applications: Server Power-Rail Protection, Storage Equipment Input Protection, IoT Equipment Power Entry, Consumer Electronics DC Input Protection, General-Purpose 5V/12V Power Supplies, Hot-Swap Board Insertion into Live Backplanes.
Server Power-Rail Protection
Toshiba explicitly lists server equipment as a target application for the TCKE712BNL. Server backplanes distribute 5V and 12V rails to hot-pluggable drives, cards, and blades; an eFuse at each rail entry disconnects a faulted load within microseconds, preventing a single shorted card from dragging down the shared midplane supply. The device's 4.4V-13.2V input range covers both rail classes, and its 53 mOhm internal MOSFET keeps conduction loss low at multi-amp loads - an estimated 0.71W at 3.65A. The Flag output reports fault status to a BMC or host controller, enabling logged, serviceable fault diagnostics rather than silent fuse blowing.
Recommended
Storage Equipment Input Protection
Toshiba lists storage among the target applications of the TCKE712BNL. HDD/SSD enclosures, NAS systems, and storage arrays insert and remove drives on live 5V and 12V rails, producing hot-plug inrush events that stress upstream converters. The eFuse's controlled turn-on limits inrush, while overcurrent protection isolates a shorted drive bay without interrupting neighboring bays. The low 53 mOhm on-resistance minimizes voltage drop on the long, shared 12V feeds typical of multi-bay enclosures. The compact 3x3 mm WSON10 package fits on dense drive-backplane layouts where a blade fuse or relay cannot, and the Flag signal supports bay-level fault reporting.
Recommended
IoT Equipment Power Entry
The TCKE712BNL's wide 4.4V-13.2V input range makes it a natural power-entry protection stage for IoT equipment powered from 5V USB-derived, 9V, or 12V adapters. Field-deployed IoT nodes face accidental shorts, adapter faults, and miswiring; the eFuse survives these events and can be reset by cycling input power rather than replacing a fuse. Its quiescent draw is compatible with always-on nodes (see datasheet for the exact figure), and the 3x3 mm WSON10 package suits compact sensor and gateway boards. The Flag output can be wired to a microcontroller GPIO to trigger remote fault telemetry in managed deployments.
Recommended
Consumer Electronics DC Input Protection
Toshiba targets consumer equipment with the TCKE712BNL: set-top boxes, adapters-powered appliances, and entertainment devices all present a DC input vulnerable to adapter shorts, reversed connectors, and overloads. An eFuse at the input jack provides a fast, self-protecting barrier that resets on power cycle, eliminating field fuse replacement and warranty returns. The 13.2V maximum input covers 12V wall adapters with limited headroom, so verify adapter open-circuit voltage stays below this limit. The small WSON10 footprint and tape-and-reel (,RF) packaging support high-volume automated assembly typical of consumer production lines.
Recommended
General-Purpose 5V/12V Power Supplies
Toshiba lists general-purpose power supply applications for the TCKE712BNL. In bench supplies, distribution boards, and industrial sub-assemblies, the eFuse serves as a resettable electronic circuit breaker on 5V or 12V outputs. Compared with a polyfuse, it acts far faster and offers a defined current-limit characteristic; compared with a mechanical breaker, it adds no moving parts and fits in 3x3 mm. The B-type feature set (Flag and RCB per Mouser) gives designers fault signaling and controlled reconnection behavior. Estimated self-heating at 3.65A is about 0.71W from 53 mOhm, so allocate exposed-pad copper per the datasheet thermal guidance.
Recommended
Hot-Swap Board Insertion into Live Backplanes
Mouser categorizes the part as a hot swap voltage controller, and the TCKE712BNL suits any module that plugs into a live supply: line cards, removable sensor carriers, and industrial I/O modules. On insertion, the undischarged bulk capacitance of the module draws a large inrush spike; the eFuse's controlled startup slews the rail voltage, keeping inrush within the upstream supply's capability. During extraction, the internal MOSFET cleanly disconnects under load. Because the whole function lives in a single WSON10 package, designers replace a multi-component discrete hot-swap circuit with one IC plus a handful of passives, saving BOM lines and board area.
Recommended
Recommended Products Summary
Engineering reference data for TCKE712BNLRF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TCKE712ANL |
|---|---|---|
| Package | WSON10 (3x3 mm) | WSON10 (3x3 mm) - same |
| Brand | Toshiba | Toshiba |
| Input Voltage Range | 4.4 V to 13.2 V | 4.4 V to 13.2 V |
| Current Class | 3.65 A (Toshiba); 5 A (Mouser) | 3.65 A class |
| On-Resistance (RON) | 53 mOhm | 53 mOhm class |
| Feature Set | Flag + RCB (B-type) | A-type feature set (confirm in datasheet) |
| Package Size | 3 x 3 mm | 3 x 3 mm |
Key Differentiators
- Integrated Flag fault output (vs Discrete fuse or polyfuse solutions)
- Low internal on-resistance (vs TCKE712ANL)
- Single-IC hot-swap integration (vs Discrete hot-swap controller + external MOSFET + sense resistor)
Design Notes
Estimated: at 3.65A continuous load with the 53 mOhm on-resistance from the Toshiba product page, the TCKE712BNL dissipates approximately P = I^2 x RON = 3.65^2 x 0.053 = 0.71W. In a 3x3 mm WSON10 package this is a significant thermal load; maximize the exposed-pad copper pour on the PCB and connect it to multiple thermal vias to an inner ground plane. Verify junction temperature against the datasheet thermal resistance at your worst-case ambient before release.
The 13.2V maximum input rating leaves limited headroom above a nominal 12V rail. Estimate: a 12V +/-5% regulated adapter peaks at 12.6V, but unregulated or open-circuit adapter voltages can exceed 13.2V. Add a TVS diode or input clamp if the source can overshoot, and verify the datasheet absolute maximum rating, which may differ from the operating range. For 5V rails the part has ample margin.
Distributor sources disagree on two parameters: Toshiba's product page states 3.65A / 53 mOhm while the Mouser listing states 5A / 56 mOhm. Do not design from the distributor summary alone - download the official Toshiba datasheet (hosted by Mouser and Toshiba) and use its current-limit equation and external setting resistor values. Also confirm the feature-set letter (B = Flag and RCB per Mouser) matches your fault-reporting requirements before substituting family variants.
Compliance Information
Compliance data was not present in the verified web data retrieved; consult the Toshiba product page or distributor compliance documents. Not marketed as automotive grade; AEC-Q100 marked not_applicable based on Toshiba's consumer/server/IoT/storage target application list.
