SES RPTR1640, POWER TRANSFORMER 16VAC/40VA, SATEMT/ALXCPU
The SES RPTR1640 is a 16VAC, 40VA replacement transformer for select Select Engineered Systems equipment that needs the higher-capacity 40VA supply. It is commonly listed for SAT EMT and ALXCPU applications, where stable low-voltage power is required for communication, call processing, relay, strobe, or auxiliary circuits depending on the system configuration.
Even though RPTR1640 shares the same 16VAC output voltage as some other SES transformers, the VA rating and intended application are different. It should not be selected simply because the voltage is similar. Use it where the SES label, manual, or parts breakdown calls for RPTR1640 or a 16VAC/40VA transformer. If the old transformer overheated or the system continues to draw excessive current, inspect the connected load before installing the replacement.
Compatible With
- SES SAT EMT series applications when RPTR1640 is specified
- SES SAT3 EMT related equipment where the parts list calls for a 16VAC/40VA transformer
- SES Alliance ALXCPU call processing unit applications where RPTR1640 is specified
- Commonly associated with SATEMT and ALXCPU listings
- Not a confirmed replacement for RPTR1620, RPTR1210, or RPTR12VDC2A
Features and Specifications
| Manufacturer | Select Engineered Systems (SES) |
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| Product Type | Low-voltage power transformer |
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| Part Number | SES-RPTR1640 |
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| Application | Low-voltage power supply replacement for select SES priority communication and Alliance equipment |
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| Electrical Output | 16VAC / 40VA |
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| Compatible Product Type | Select SES SAT EMT and Alliance ALXCPU applications where RPTR1640 is specified |
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| Included Components | Replacement transformer only unless otherwise supplied by the manufacturer |
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| Notes | Higher VA transformer for the listed SES SAT EMT and ALXCPU applications; do not use as a general substitute. |
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Also Known As / Related Part Numbers
- SES-RPTR1640
- RPTR1640
- SES RPTR1640
- 16VAC 40VA SES transformer
- 16 VAC 40 VA transformer for SES SAT EMT ALXCPU
- RPTR-1640 search variation
Technician Note
This is the 40VA version used for the listed SES applications. If a system originally used a 20VA transformer, do not automatically upgrade to this part unless the SES documentation for that specific unit says to do so.
Before Ordering
- Match the SES part number from the existing transformer or the SES parts diagram whenever possible.
- Confirm the required output voltage and VA or amp rating before replacing the transformer.
- Inspect the cabinet for water intrusion, corrosion, blown fuses, damaged low-voltage wiring, or a shorted accessory before installing the new transformer.
- Do not substitute a transformer with a different output rating just because the connector or wire colors look similar.
- Have a qualified access control technician handle wiring when the transformer is tied into line-voltage power or a shared power supply.
Professional Advisory
Power supply problems can damage boards, displays, cellular modules, relay circuits, and audio circuits if the root cause is not corrected. Do not bypass fuses, surge protection, grounding, or safety devices. If the entry unit repeatedly loses power or burns transformers, have the wiring and connected equipment checked by a qualified technician.
Important Ordering Warnings
- Confirm whether the existing unit calls for 16VAC/40VA rather than 16VAC/20VA.
- SAT, SAT EMT, and Alliance equipment may include special communication or auxiliary circuits that should be checked by a technician if power failure repeats.
Product Questions
What is the rating of the SES RPTR1640?
The RPTR1640 is rated 16VAC and 40VA.
What equipment is RPTR1640 commonly associated with?
It is commonly listed for select SES SAT EMT and ALXCPU applications where a 16VAC/40VA transformer is specified.
Is RPTR1640 the same as RPTR1620?
No. RPTR1640 is 40VA, while RPTR1620 is 20VA. The correct transformer should be selected from the SES model label or parts diagram.
Can a larger VA transformer fix a weak SES entry unit?
Not by itself. A weak or resetting unit may have a board, wiring, load, or surge issue. Use the transformer rating specified for the equipment.
Should I replace the transformer if it overheated?
Yes, if it failed, but the connected circuit should also be checked for shorts, water damage, or overload before the new transformer is installed.
