DS200LRPAG1PR1A GE | New Surplus Stock

Description

Product Introduction

The custom control cabinet had airflow from bottom to top. The standard LRPA fan blew air back-to-front — against the cabinet’s airflow. Hot air recirculated. The rack overheated. GE built the PR1A. Reverse fan airflow (front-to-back). Same direction as the cabinet’s cooling. The hot air exhausts to the rear. The rack stays cool. The drives run.

The DS200LRPAG1PR1A is the reverse airflow primary power supply for Mark V racks. Same electrical specs as the standard LRPA-G1A (575 W, 94% efficiency, universal input), but the fan direction is reversed (front-to-back instead of back-to-front). The PR1A pulls cool air from the front of the rack and exhausts hot air out the rear. The board has a reverse-flow fan (marked with a decal) and a different front panel (intake grille instead of exhaust).

What makes the PR1A different from the standard G1A? Fan direction (front-to-back). Intake grille on the front panel. The PR1A is for cabinets with standard front-to-back cooling. For new cabinets, specify the PR1A. For retrofits, match the existing airflow.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

Reverse airflow testing requires airflow direction verification.

Incoming Verification: OEM packing slip. Visual inspection: fan flow direction arrow (decal), front grille (intake, not exhaust), fan connector (same as standard but reversed polarity). The board has a label “AIRFLOW FRONT TO BACK.”

Airflow Direction Test (Smoke): Apply power. Use smoke source at front grille. Smoke must be drawn into the fan. At the rear, smoke must exhaust. Verify with anemometer (air velocity >1 m/s at rear).

Airflow Volume Test: Measure CFM at rear exhaust (anemometer). Must be >30 CFM at 100% fan speed (spec: 35 CFM).

Electrical Test (Full Load, 8 Hours): Same as standard G1A. 575 W load, 40 °C ambient. Outputs within spec.

Thermal Test (Cabinet Configuration): Install PR1A in a test cabinet with front-to-back cooling. Run at 100% load for 4 hours. Cabinet internal temperature must be <10 °C above ambient (cooling effective).

Reverse Polarity Protection Test: Fan connector has reverse polarity protection (diode). If connected backward, fan doesn’t spin (no damage). Test.

Field reliability note (from our RMAd board tracking): We sold 18 units of DS200LRPAG1PR1A over 18 months. Zero field failures. 0% failure rate.

Field Replacement Pitfalls

Get these five right and you’ll cut rework time by 90%. Reverse airflow is simple but critical.

Airflow Direction — Do Not Block Intake Grille
The PR1A pulls air from the front. One site mounted the board with the front panel flush against a solid door (no air gap). The fan starved. The board overheated. Provide 25 mm clearance in front of the grille. The cabinet door needs louvers or a cutout.

Mixing Standard and Reverse Supplies — Do Not (Airflow Conflict)
One site installed a standard G1A (back-to-front) next to a PR1A (front-to-back). The two fans fought each other. Hot air recirculated. Replace all supplies with the same airflow direction. The cabinet must have consistent airflow.

Filter — Optional, But Recommended (Dusty Environments)
The front intake grille accepts a filter (GE# 336A6400P1). One site ran the PR1A without a filter in a dusty environment. Dust accumulated on the fan blades. The fan noise increased (30 dBA). Add the filter. Replace it every 3 months.

Fan Replacement — Same Fan, Different Orientation
The PR1A uses the same fan as the standard G1A (GE# 336A6300P1). One site replaced a failed fan with a standard fan (same part number). The fan spins the correct direction (the fan controller reverses polarity). The replacement fan works. No special fan needed.

Cabinet Cooling — Match Airflow to PR1A (Front-to-Back)
The PR1A assumes the cabinet has front-to-back cooling. One site installed PR1A in a cabinet with bottom-to-top cooling. The PR1A pulled cool air from the front (which was warm at the top). The board ran hot. Use the standard G1A (back-to-front) for bottom-to-top cabinets.

New Original vs. Refurbished: Why It Matters

Reverse airflow fans are identical to standard fans — refurbished boards may have wrong fan orientation.

What “New Original (New Surplus)” means on this model:
GE manufactured the LRPAG1PR1A in limited quantities. Our stock comes from a cabinet integrator’s overstock — original GE cartons, board never powered. The fan is correctly oriented. The front grille is clean.

Refurbished risk in plain terms:
One refurbished PR1A we tested had a standard fan (back-to-front orientation). The seller replaced the fan with a generic unit and didn’t check direction. The board exhausted hot air to the front. The cabinet overheated. Another refurbished board had a missing front grille (fan exposed). Dust ingress.

Real cost of a refurbished failure:
A PR1A with wrong fan direction fights the cabinet airflow. Hot air recirculates. The rack overheats. The controller resets. Downtime: 5,000-10,000 per hour. A refurbished PR1A sells for 400-700 online. Our new surplus price is 900. The difference is 200-500. One hour of downtime pays for the delta.

What we provide as proof:

• Original GE carton
• Airflow direction test (smoke, front-to-back)
• Airflow volume test (>30 CFM)
• Full load test (575 W, 8 hours)
• Fan orientation decal (factory-installed)
• Front grille included (with filter option)
• 12-month warranty

Our price sits roughly 35% below GE’s last list price ($1,400) and about 60% above typical refurbished listings. The delta pays for airflow verification, fan orientation, and cabinet compatibility.

Performance Benchmarks & Test Results

Test environment: 120 V AC input, 40 °C ambient, cabinet with front-to-back cooling, PR1A in slot 0.

Airflow direction: Front to back (measured). Smoke test: front intake, rear exhaust.

Airflow volume (100% fan speed): 34 CFM (spec: 35 CFM). Acceptable.

Fan noise (1 meter, 100% speed): 24 dBA (spec: 25 dBA). Silent.

Efficiency (full load, 575 W, 120 V AC): 94.1% (same as standard G1A).

Output +5 V regulation (0-25 A): 4.99-5.01 V. Ripple: 24 mV.

Cabinet temperature rise (100% load, 4 hours): Ambient 40 °C, cabinet internal 46 °C (6 °C rise). Acceptable.

Fan failure simulation (stall fan): Board detects fan failure via tachometer. Logs fault. Output continues (fan redundancy). Board shuts down if internal temperature >85°C (60 seconds).

Front grille filter (dirty simulation): Clogged filter reduces airflow to 15 CFM. Board temperature rises 10°C. Logs “Airflow Restricted” warning.

Field reliability note (from our RMAd board tracking): 18 units sold, 0 failures. Refurbished boards: tested 6 units, 2 had wrong fan orientation, 2 had missing front grilles, 1 had low airflow (worn fan), 1 passed (but fan noisy). 17% acceptable. Buy new surplus for correct airflow.

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