Updated · July 2026
The HeartSine 350P puts the pads and the battery in one cartridge with one expiry date. Every other AED here has two consumables and two dates to track. It is also the smallest and lightest unit on the market. Buy it for churches, small offices and homes. Skip it if you need compression depth coaching: buy the ZOLL AED Plus.
Most AED buying advice compares shock energy and warranty length. For a small site, neither is what kills the device. What kills it is that nobody replaced the pads, because nobody was tracking two expiry dates on a box in a corridor. That is the problem this AED solves.
Our verdict
HeartSine Samaritan PAD 350P
Buy it when nobody at your site has “AED” in their job description. The Pad-Pak collapses two consumables into one cartridge with a single four-year date, so maintenance becomes one diary entry instead of two. At roughly 2.4 lb it is also the smallest and lightest AED on the market, and its IP56 rating is one of the highest in the category.
Do not buy it if compression quality is your priority. The 350P has a metronome for pace but does not measure how deep the compressions actually go. The ZOLL AED Plus does. If children are a primary population, the separate Pediatric-Pak reintroduces the second-cartridge problem this device otherwise avoids.
The Pad-Pak: one cartridge, one date
On a normal AED you own two consumables. Pads expire on one date. The battery expires on another. Both are dated parts regulated under the same approval pathway as the device itself.[3] Miss either one and the machine is decoration.
The Pad-Pak is one cartridge containing both, with a single four-year life.[6] HeartSine describes the four-year Pad-Pak life as an industry first. Each cartridge provides 60 shocks or roughly six hours of continuous monitoring.[6]
That sounds like a convenience feature. It is not. It is the difference between one calendar reminder and two, at a site where the person responsible changes every eighteen months and nobody hands over the AED folder. Every top-ranking page lists the Pad-Pak in a bullet. None of them says why it matters.
The catch: if children are present you add a Pediatric-Pak, which is a separate cartridge with its own date, and you are back to tracking two things. If that is your situation, read the schools guide instead.
Specification
| Attribute | HeartSine 350P | What it means for you |
|---|---|---|
| FDA status | FDA-approved via Premarket Approval[1] | Verify PMA family for your variant in the FDA database[2] |
| Consumable | Pad-Pak · pads + battery, one cartridge | One expiry date instead of two. The reason to buy this device[6] |
| Pad-Pak life | ~4 years | 60 shocks or ~6 hours monitoring per cartridge[6] |
| Weight | ~2.4 lb | Smallest and lightest on the market[6]. Matters for mobile and wall space |
| Ingress rating | IP56 | Higher than the IP55 on the ZOLL AED Plus and LIFEPAK CR2 |
| Operation | Semi-automatic | The rescuer presses the shock button. The 360P is the fully-automatic sibling |
| CPR guidance | Metronome + visual prompts, no depth measurement | It sets the pace. It does not tell you to push harder |
| Pediatric | Separate Pediatric-Pak | Reintroduces a second cartridge and a second date |
| 2026 list | $1,411 | Lowest entry price in this comparison |
Confirm the current PMA record and labeling for your exact variant in the FDA PMA database[2], and check the model against the FDA recall database[4] before purchase, particularly on a used unit.
The five-year cost
This is where the single cartridge earns its keep. One consumable, one replacement event, one purchase order.
Device (2026 list) ……………. $1,411
Pad-Pak, ~4 yr life ………….. 1 replacement (pads AND battery together)
Separate battery …………….. none. It is in the Pad-Pak
Consumable events over 5 years … 1
Philips HeartStart OnSite, same window
Device (2026 list) ……………. $1,589
Pads, ~2 yr life …………….. 2 replacements
Battery, ~4 yr life ………….. 1 replacement
Consumable events over 5 years … 3
Labeled estimate. Replacement counts use ceil(years ÷ component life) − 1 and assume no deployment. A real rescue consumes the cartridge immediately, so budget a spare regardless of model. Run your own numbers in the AED cost calculator. Ongoing parts: AED pads and AED batteries.
One event versus three, over five years, at a site with no dedicated AED owner. That is the whole argument, and it compounds the longer you keep the device.
Who should buy it, and who should not
Buy the 350P if
- Nobody owns the AED. One cartridge, one date. Fewer things to forget. See the churches guide.
- Budget is the binding constraint. Lowest entry price of the models we cover.
- Space or portability matters. ~2.4 lb, the smallest and lightest on the market.[6]
- The environment is harsh. IP56 is a higher ingress rating than the ZOLL AED Plus or LIFEPAK CR2.
Buy something else if
- You want compression depth coaching. ZOLL AED Plus measures depth and says push harder. The 350P only sets the pace.
- Children are a primary population. The separate Pediatric-Pak undoes the one-cartridge advantage. ZOLL AED 3 covers both on one set.
- You want CPR feedback at HeartSine prices. The 450P adds rate guidance and keeps the Pad-Pak.
- You manage a fleet. No connectivity here. ZOLL AED 3 or LIFEPAK CR2 report readiness remotely.
How it compares
| Model | Consumables to track | CPR guidance | Weight | 2026 list |
|---|---|---|---|---|
| HeartSine 350P | 1 · Pad-Pak | Metronome, no depth | ~2.4 lb | $1,411 |
| Philips HeartStart OnSite | 2 · pads + battery | None | ~3.3 lb | $1,589 |
| HeartSine 450P | 1 · Pad-Pak | Rate guidance | ~2.4 lb | $1,761 |
| ZOLL AED Plus | 2 · padz + batteries | Depth + rate | heavier | $2,082 |
| ZOLL AED 3 | 2 · Uni-padz + battery | Depth + rate | heavier | $2,399 |
Same brand, one step up: HeartSine 350P vs 360P vs 450P. Considering used: best refurbished AEDs. Full lineup: HeartSine brand hub, Philips, and the AED brands hub. New to this: AED buyer’s guide. Environment picks: AEDs by industry and the home guide.
Sources
- FDAUS Food and Drug Administration. “Automated External Defibrillators (AEDs).” fda.gov
- FDAUS Food and Drug Administration. Premarket Approval (PMA) database. accessdata.fda.gov
- Federal Register“Effective Date of Requirement for Premarket Approval for Automated External Defibrillator Systems,” 2015. federalregister.gov
- FDAUS Food and Drug Administration. Medical Device Recalls database. accessdata.fda.gov
- AHAAmerican Heart Association. AED Implementation Guide. cpr.heart.org
- ManufacturerHeartSine / Stryker. samaritan PAD 350P product documentation and Pad-Pak specification. heartsine.com (manufacturer source)
Editorial content only. Not medical advice. Size, weight and Pad-Pak performance claims are the manufacturer’s own, cited above and labeled as manufacturer documentation. Specifications reflect manufacturer and distributor documentation current at publication; confirm the PMA record, labeling and recall status of your exact variant and package before purchase. Prices are 2026 US list at authorized distributors and change without notice. Cost figures are labeled estimates, not quotes.
