421-557 ALLANSON Ignition Transformer – 120V Primary, 10,000V Secondary | Double Pole

The 421-557 ALLANSON Ignition Transformer is a high-performance, double-pole ferromagnetic transformer designed for constant-duty oil burner applications. With a 120V primary input and 10,000V secondary output, this transformer provides a reliable ignition source for ARCO and American Standard oil burners in commercial, residential, and industrial settings. Built to burner manufacturer specifications, it runs cooler, quieter, and safer, while meeting American and European EMI/RFI noise emission standards.

🔑 Key Features

✅ Burner Manufacturer: ARCO, American Standard
✅ Burner Type: ARCO, American Standard
✅ Primary Voltage: 120V AC, Input Frequency 60Hz
✅ Current: 23 mA
✅ Secondary Voltage: 10,000V
✅ Poles: Double Pole
✅ Grounding: Mid-Point Ground
✅ HV Terminal: Buss Bar Clips for secure high-voltage connection
✅ Junction Box: External for easy wiring
✅ Can Size: Large Can Series
✅ Designed with high-temperature wire for durability
✅ Runs cooler and quieter on all types of burners
✅ Designed according to burner manufacturer specifications
✅ Meets American and European EMI/RFI noise emission standards
✅ Constant-duty design for oil burner applications

📊 Technical Specifications

⚠️ Common Symptoms Indicating Transformer Replacement

• Burner fails to ignite or produces weak spark

• Inconsistent ignition performance

• Excessive heat or unusual noise from transformer

• Visible damage or insulation wear

🛒 Shopping Tips

• Confirm Compatibility: Designed for ARCO and American Standard oil burners.

• Proper Installation: Use mid-point grounding and buss bar HV clips correctly for safe operation.

• Constant Duty: Designed for continuous operation without overheating.

• Noise Compliance: Meets EMI/RFI standards for safe and quiet operation.

• Can Size: Large Can Series for ARCO and American Standard burners.

❓ Frequently Asked Questions (FAQ)

Q1: What burners can this transformer be used with?
A: Designed for ARCO and American Standard oil burners.

Q2: Is this a single-pole or double-pole transformer?
A: This is a double-pole transformer.

Q3: What is the input and output voltage?
A: Input: 120V AC, Output: 10,000V.

Q4: What type of HV terminal does it use?
A: Buss Bar Clips for secure high-voltage connection.

Q5: Can it be used for constant-duty operation?
A: Yes, it’s designed for continuous operation without overheating.

Q6: Does it meet EMI/RFI standards?
A: Yes, compliant with American and European noise emission standards.

Q7: What type of junction box does it use?
A: External junction box for easy wiring and maintenance.