HeartSine and Philips compete most directly at the budget tier — small businesses, churches, daycares, and homes shopping for AEDs at the $1,295–$1,495 price point. Both deliver an FDA-cleared, fully-functional device at that range. The decision comes down to maintenance philosophy: HeartSine’s PAD-PAK is one cartridge to replace every 4 years; Philips uses separate pads (every 2 years) and battery (every 4 years). Over 10 years, the math favors HeartSine.
Head-to-head spec comparison
| Spec | HeartSine PAD 350P | Philips HeartStart OnSite |
|---|---|---|
| Price (MSRP) | $1,295–$1,495 | $1,295–$1,495 |
| Warranty | 10 years | 8 years |
| Weight | 2.4 lb | 3.3 lb |
| IP rating | IP56 | IP21 (indoor only) |
| Consumable system | Single PAD-PAK cartridge (pads + battery) | Separate pads + battery |
| Replacement cycle | Every 4 years (one part) | Pads every 2 yrs · battery every 4 yrs |
| Per-cycle cost | $159–$169 (PAD-PAK) | $72 pads · $169 battery |
| 10-year TCO | $2,550 | $2,910 |
The PAD-PAK advantage
HeartSine’s PAD-PAK consolidates pads + battery into a single sealed cartridge. Replace once every 4 years. One purchase order, one expiration date, one inventory SKU. For organizations without dedicated facilities maintenance, such as small businesses, churches, daycare, this maintenance simplification is the single biggest operational difference. Philips users juggle two separate expiration calendars across the same period.
Verdict by use case
Best for small business · church · daycare
HeartSine PAD 350P
Lightest unit (2.4 lb), longest warranty (10 years), single-cartridge maintenance, IP56 for any environment. Lower 10-year TCO. Best value at the budget tier.
Best for the general workplace · familiar brand
Philips HeartStart OnSite
Largest U.S. install base. Clearest voice prompts. EMS familiarity. Slightly cheaper upfront ($72 lower per pad cycle). Indoor only (IP21).
Pros and cons
HeartSine wins on
- 10-year warranty
- Single PAD-PAK cartridge
- IP56 outdoor capable
- 2.4 lb lightest in category
- Lowest 10-year TCO
Philips wins on
- Largest U.S. install base
- Clearer voice prompts
- Slightly lower per-cycle cost
- EMS familiarity
When Philips makes more sense than HeartSine
Three scenarios where Philips OnSite is the better pick: (1) your organization has standardized on Philips across multiple sites; (2) your insurance broker or facility GC specifies Philips; (3) you have an existing supply relationship with Philips-authorized distributors at preferential pricing.
Frequently Asked Questions
Is HeartSine cheaper than Philips long-term?
Yes. HeartSine 10-year TCO runs about $2,550 vs Philips at $2,910 — driven by the single-cartridge PAD-PAK system.
What’s the difference between HeartSine 350P and Philips OnSite?
HeartSine uses one combined PAD-PAK cartridge (4-year cycle); Philips uses separate pads (2-yr) and battery (4-yr). HeartSine has an IP56 outdoor rating; Philips has an IP21 indoor only.
Does Philips have a 10-year warranty option?
No — Philips standard is 8 years. HeartSine offers 10 years across its Samaritan PAD line.
Can I use HeartSine outdoors?
Yes — IP56 rating handles direct rain. Philips OnSite at IP21 is indoor only; the Philips FRx (IP55) is the outdoor equivalent at a higher cost.
Which is easier for a non-technical office manager?
HeartSine — one replacement cartridge to track every 4 years. Philips requires tracking two separate expirations.
Get your team certified the easy way.
Sources & References
- Manufacturer specs: HeartSine Samaritan PAD 350P, Philips HeartStart OnSite
- FDA — AED Regulation
Disclaimer: 2024–2025 MSRP. Verify with authorized resellers.
