Product Description
Eaton H2012B-3 Heater Pack — 14–22.8A, Class 20, Freedom Series
The Eaton H2012B-3 is a precision-calibrated, Class 20 standard trip heater pack for Eaton Freedom Series and Definite Purpose NEMA overload relays. Sold as a pack of 3 bimetallic heater elements, the H2012B-3 covers a full-load amp (FLA) range of 14.0A to 22.8A across four adjustable dial positions. It is compatible with Eaton Freedom Series 32A and 75A overload relays and is suitable for NEMA starter sizes 00 through 2. Also sold under the Cutler-Hammer brand name.
Quick Specifications
- FLA Range: 14.0A – 22.8A
- Trip Class: Class 20 (Standard Trip)
- Sensing Method: Bimetallic
- Package Quantity: 3 heater elements per pack
- Compatible Overload Relays: Freedom Series 32A and 75A overload relays
- NEMA Sizes: 00 through 2 (Series B and C starters)
- Application: Freedom Series and Definite Purpose NEMA/IEC motor starters
Dial Position & Full-Load Amp Settings
| Dial Position | Full-Load Amps (FLA) | Typical Motor Application |
|---|---|---|
| A | 14.0A | ~5 HP @ 230V / ~10 HP @ 460V |
| B | 16.9A | ~7.5 HP @ 230V / ~15 HP @ 460V |
| C | 19.9A | ~10 HP @ 230V / ~15 HP @ 460V |
| D | 22.8A | ~10 HP @ 230V / ~20 HP @ 460V |
Compatible Overload Relays
| Overload Relay | Relay Current Rating | NEMA Starter Sizes |
|---|---|---|
| Freedom Series (NEMA) | 32A | 00 through 2 (Series B) |
| Freedom Series (NEMA) | 75A | 00 through 2 (Series C) |
| Definite Purpose Series | 32A or 75A | Compatible sizes |
Product Features
- Pack of 3 Heater Elements: The H2012B-3 is sold as a set of 3 bimetallic heater elements — sufficient for a complete 3-phase motor starter installation. One element per phase.
- Four Adjustable Dial Positions: A single pack covers four FLA settings (14.0A, 16.9A, 19.9A, 22.8A) via the dial on the overload relay body. Match the dial position to the motor’s nameplate FLA for accurate thermal protection.
- Class 20 Standard Trip: Provides thermal overload protection with a Class 20 trip time characteristic — appropriate for standard motor starting applications. For motors with high-inertia loads requiring longer start times, consult Eaton’s heater selection guide.
- Bimetallic Sensing: Uses bimetallic strip technology to detect motor overload conditions through heat generated by excess current, providing reliable and repeatable thermal protection.
- Also Known as Cutler-Hammer H2012B-3: This heater pack is sold under both the Eaton and Cutler-Hammer brand names. Both refer to the same part — Cutler-Hammer is a legacy brand now part of Eaton.
- UL Listed: Approved for use in compliant motor starter installations.
Stock Item – Order before 4:00 PM EST for Same-Day Shipping.
Frequently Asked Questions
How do I select the correct heater element for my motor?
Find the motor’s full-load amperage (FLA) on the motor nameplate. Match the FLA to the closest dial position on the H2012B-3: Position A = 14.0A, B = 16.9A, C = 19.9A, D = 22.8A. If your motor’s FLA falls between two dial positions, select the position closest to the actual nameplate FLA. If the motor FLA is outside the 14.0–22.8A range of this pack, select a different heater pack from the H-series range to match your motor. Contact Kent Electrical Supply at 1-800-222-5129 if you need help selecting the correct heater.
How many heater elements are in the H2012B-3 package?
The H2012B-3 contains 3 heater elements per pack — one for each phase of a standard 3-phase motor starter. The “-3” suffix in the part number denotes a pack of 3. This is sufficient for a single complete motor starter installation. If you are stocking replacement parts for multiple starters, order one pack per motor starter.
Which Eaton overload relays is the H2012B-3 compatible with?
The H2012B-3 is compatible with Eaton Freedom Series 32A and 75A NEMA overload relays used in NEMA Size 00 through Size 2 motor starters (Series B and C). It is also compatible with Eaton Definite Purpose series overload relays of equivalent ratings. If you are unsure whether the H2012B-3 fits your specific overload relay, check the relay’s heater selection table or call us at 1-800-222-5129.
Is Cutler-Hammer H2012B-3 the same as Eaton H2012B-3?
Yes — Cutler-Hammer is a legacy brand that was acquired by Eaton. The H2012B-3 is sold under both the Eaton and Cutler-Hammer brand names and refers to exactly the same heater pack. If your existing equipment documentation references “Cutler-Hammer H2012B-3”, the Eaton H2012B-3 available here is the correct replacement.
What is Class 20 trip rating and when do I need it?
Class 20 refers to the trip time characteristic of the overload relay — specifically, a Class 20 relay trips within 20 seconds at 600% of its rated current. This is the standard trip class for most general-purpose motor starters including pumps, fans, conveyors, and HVAC compressors. For motors that require a longer acceleration time (such as high-inertia loads like large flywheels or centrifuges), a Class 30 heater may be more appropriate. Consult the motor nameplate or Eaton’s heater selection guide if you are unsure.
Is the H2012B-3 in stock for same-day shipping?
Yes — the H2012B-3 is a stocked item at Kent Electrical Supply’s warehouse in Emmaus, PA. Orders placed before 4:00 PM EST ship the same business day. Current stock quantity is shown on this page. For bulk pricing on multiple packs, call us at 1-800-222-5129 or text your RFQ to 484-425-0652.
