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Spec Sheet
Product Specs
- Contact Configuration:
- SPST-NO
- Configuration:
- IP20
- Indicator Color:
- Green
- Input Voltage:
- 90-280V
- Output Voltage:
- 48-600V
- Rated Operational Current:
- 40A
- Series:
- D99 series
- Department:
- Electrical
- Product Length:
- 3.1 IN
- Switch Classification:
- Zero cross
- Product Height:
- 4.2 IN
- Product Weight:
- .73 LB
- Product Width:
- 1.2 IN
B-LINE D99640ACZ1 – Frequently Asked Questions
1) Can the B-Line D99640ACZ1 solid-state relay be driven directly from 120V or 240V line control power?
Yes. The D99640ACZ1 takes an AC control input of 90 to 280V, so either a 120V or a 240V control circuit drives it directly with no interposing relay or DC supply. If your control signal is low-voltage DC from a PLC output card, this is the wrong input range and you need a DC-input version instead.
2) What load voltage and current can the D99 Series 40A solid-state relay switch?
The load side covers 48 to 600V AC at a rated operational current of 40A, so it handles 208V, 240V, 480V and 600V circuits within that amp rating. Below 48V on the load side it is out of range. Remember SSRs are rated at a reference ambient with a heat sink, so size the 40A against your actual duty and mounting.
3) Is this relay suitable for switching a resistive heater load, and will it cause noise problems?
It is a zero cross switching type, meaning it turns on as the AC waveform passes through zero. That minimizes inrush and electrical noise and is the right choice for resistive loads such as heating elements, ovens and duct heaters on a slow on/off or PID time-proportioning control. Zero cross is not the type to use for phase-angle proportional control or for dimming.
4) Is the D99640ACZ1 a single pole relay, and does it open the circuit when de-energized?
Contact configuration is SPST-NO, so it is one pole, normally open, switching a single line conductor and open with no control signal applied. For a three phase heater or motor load you need one unit per switched leg, or a three pole SSR assembly.
5) Can this solid-state relay be mounted in an open panel or does it need an enclosure?
The unit is rated IP20, which is finger-protection only with no protection against water or dust. It must go inside a control panel or enclosure, not on an exposed wall, in a wash-down area, or outdoors.
6) Should I use a solid-state relay like this instead of a mechanical contactor for a heating circuit?
For a heater that cycles frequently, the solid-state route wins on life because there are no moving contacts to erode, and zero cross switching keeps the inrush and noise down. A mechanical contactor is still the choice where you need physical isolation, a tolerance for high overload and short circuit stress, or multi-pole switching in one device. This unit is SPST-NO, so a three phase load needs one per leg.
7) Can a technician tell at a glance whether the relay is being commanded on?
There is a green status indicator on the unit that shows the control input is energized. That gets a tech through the first step of troubleshooting without a meter: green lit with no load current points at the output side or the load, green dark points back at the control circuit.
8) What is the exact part number to order for the B-Line 40A zero cross SSR?
Order by manufacturer part number D99640ACZ1. It is the single model in the B-Line D99 series configuration with the 90-280V AC input, 48-600V output and 40A rating, so there are no finish or option suffixes to specify.
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE D99640ACZ1 come with a warranty?
Absolutely. The B-LINE D99640ACZ1 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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