RSSDN-90A.

SSR, DIN/PANEL MOUNT, 660VAC, 32VDC, 90A

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Manufacturer: IDEC
Product type:
Contact Configuration:SPST-NO; Load Current:90A; Operating Voltage Max:660VAC; Relay Mounting:Panel Mount; Relay Terminals:Screw; Switching Mode:Zero Crossing 31B3395
Load Current: 90A
Product Range: RSS Series
Relay Mounting: Panel Mount
Switching Mode: Zero Crossing
Relay Terminals: Screw
Control Voltage Max: 32VDC
Control Voltage Min: 4VDC
Contact Configuration: SPST-NO
Operating Voltage Max: 660VAC
Operating Voltage Min: 48VAC

Delivery and price
Units per pack	250
Price	60.3 €
Current stock	50+
Lead time	30 days

Datasheet

_**Relays**_ 

RSS Series 

## **RSS Series — Panel Mount Solid State Relays** ~~Lo~~ 

## **Key features of the RSS series include:** 

- **Input status LED Indicator** 

- **Dual SCR output** 

- **Direct bond copper substrate** 

- **Internal transient protection – built-in snubber** 

- **EMC compliant (level 3)** 

- **Photo isolation** 

- **1200 volt blocking voltage** 

- **4000 volt optical isolation** 

- **Zero voltage turn-on** 

- **100% tested at rated current** 

- **High surge capability** 

**•  Optional finger-safe terminal cover (RSS-CVR) E** UL Recognized File No. E194577 = a C ~~€~~ **Series RSSDN RSSAN Voltage Range** 4 to 32V DC 90 to 280V AC **Input Current** current regulated (10mA) **Pick Up Voltage** 4V DC 90V AC **Drop Out Voltage** 1V DC 10V AC **Dielectric Strength** 4000 RMS (min) 4000 RMS (min) (Input-Output-Base) **Capacitance** 8pF 8pF (Input to Output) **Rev. Voltage Protection** Yes (–32VDC) N/A ~~f~~ o **Current** (continuous) 10A 25A 50A 75A 90A ~~P~~ ee **1-Cycle Surge Current** 150A o 300A 750A 1000A ee 1200A ee **1-Second Surge Current** 30A 75A 150A 225A 300A es **Minimum Holding Current** 50mA ee 50mA 100mA 100mA ee 100mA **Voltage Drop** 1.6V (maximum) **at Rated Current** po **Voltage Range** 48 - 660V AC Pp **Contact** 1 Form A (SPST-NO) PF **Over Voltage Rating** 1200 PIV Pp **Frequency Range** 47 to 80Hz PF **Off-State Leakage** 20mA (maximum) **at Rated Voltage** po **Turn-On Time** 1/2 cycle @ 60Hz Pp **Turn-Off Time** 1/2 cycle @ 60Hz PF **Zero Voltage Switching** Yes Pp **Static DV/DT** 200V/µsec PF **Commutating DV/T** Snubbed for 0.5 power factor at rated load **Weight** 10g (approx.) ~~PF~~ 

**10, 25, 50, 75, 90A Current Ratings 48V AC to 660V AC Output Ratings** 

## **Part Numbers** 

## **Part Numbers: RSS Series** 

|**Continuous Output Current**|**DC Input**|**AC Input**|
|---|---|---|
|10A|RSSDN-10A|RSSAN-10A|
|25A|RSSDN-25A|RSSAN-25A|
|50A|RSSDN-50A|RSSAN-50A|
|75A|RSSDN-75A|RSSAN-75A|
|90A|RSSDN-90A|RSSAN-90A|



_**www.idec.com**_ 

_**E-36**_ 

_**USA: (800) 262-IDEC or (408) 747-0550,   Canada: (888) 317-IDEC**_ 

RSS Series 

**E** 

## _**Relays**_ 

## **Recommended Loads** 

## **Transformer Loads** 

Transformer loads sometimes result in severe inrush current when the transformer saturates during the first cycle. Use a relay rated for this surge, which has a 1/2 cycle surge current greater than the maximum applied line voltage ÷ the transformer’s primary resistance (approximately 10x rated current). 

## **Recommended Loads** 

|**SSR Rating**|**at 120V AC**|**at 240V AC**|
|---|---|---|
|2A|150VA|300VA|
|4A|200VA|400VA|
|10A|500VA|1KVA|
|25A|1KVA|2KVA|
|50A|2KVA|4KVA|



## **Lamp Loads** 

Zero voltage switching is ideal for driving incandescent lamps, since the cold filament will not be subjected to a large inrush current. Using a zero-switched SSR will reduce inrush current and prolong lamp life. 

## **Recommended Loads** 

|**SSR Rating**|<br>**at 120V AC**|**at 240V AC**|
|---|---|---|
|2A|2A|2A|
|4A|3A|3A|
|10A|1KW|2KW|
|25A|2KW|4KW|
|50A|3KW|6KW|



## **Heater Loads** 

When using solid state relays for driving heaters where the load is switched on and off rapidly and continuously, severe thermal stress will result. In such cases, use an SSR relay at no more than 75% of the rating. 

## **Recommended Loads** 

|**SSR Rating**|**at 120V AC**|**at 240V AC**|
|---|---|---|
|2A|250W|500W|
|4A|400W|800W|
|10A|1KW|2KW|
|25A|2KW|4KW|
|50A|3KW|6KW|



## **Solenoid Valves and Contactors** 

RSS relays use high-noise immunity circuitry with a snubber to handle the electrical noise generated by inductive loads. 

## **Recommended Loads** 

|**SSR Rating**|**at 120V AC**|**at 240V AC**|
|---|---|---|
|2A|250W|500W|
|4A|400W|800W|
|10A|900W|1,800W|
|25A|2,100W|4,200W|
|50A|3,800W|7,500W|



## **Internal Circuit Block Diagram** 

**==> picture [173 x 185] intentionally omitted <==**

**----- Start of picture text -----**<br>
4<br>1<br>TRIGGER<br>CIRCUIT<br>3 2<br>AC INPUT EQUIVALENT CIRCUIT<br>4<br>1<br>TRIGGER<br>CIRCUIT<br>3 2<br>DC INPUT EQUIVALENT CIRCUIT<br>SNUBBER<br>SNUBBER<br>**----- End of picture text -----**<br>


RSS series relays provide a highly reliable means of switching AC loads when applied properly. Read the following technical notes prior to installing IDEC’s quality solid state relays. 

## **UL Motor Load Ratings (HP Ratings)** 

|**Part Number**|**120V**|**240V**<br>**480V**|**240V**<br>**480V**|
|---|---|---|---|
|10A|1/2|3/4|3/4|
|25A|1/2|3/4|3/4|
|50A|3/4|11/2|11/2|
|75A|3/4|5|5|
|90A|3/4|5|5|



_**www.idec.com**_ 

_**USA: (800) 262-IDEC or (408) 747-0550,   Canada: (888) 317-IDEC**_ 

_**E-37**_ 

_**Relays**_ 

RSS Series 

**E** 

## **Technical Notes** 

## **Environment** 

Do not install SSRs near sources of excessive heat. Make sure applications are dry and well ventilated. 

If SSRs must be installed in an environment subject to high temperatures or poor ventilation, or if SSRs are mounted collectively, reduce the load current so that it does **not** approach the ambient temperature-load current recommendation. (See the Temperature Derating Curves on the following page.) 

When SSRs are used with inductive loads, suppress the inrush current to half of the peak surge current. 

## **Heat Sinks** 

Heat sinks are recommended for 10, 25, 50, 75, and 90 amp rated solid state relays depending on ambient temperature and mounting position. The recommended heat sink dimensions and material are shown in the table: 

|**Output Rating**|**Dimensions**|**Material**|
|---|---|---|
|10A|12" x 12" x 1/8"|Aluminum (black anodized)|
|25A|12" x 12" x 1/8" (DC/AC)|Aluminum (black anodized)|
|25A|15" x 15" x 1/8" (AC/AC)|Aluminum (black anodized)|
|50A|15" x 15" x 1/8"|Aluminum (black anodized)|
|75A|17" x 17" x 1/8"|Aluminum (black anodized)|
|90A|17" x 17" x 1/8"|Aluminum (black anodized)|



Using a thermal compound between the base of the SSR and the heat sink for heat dissipation is recommended. 

## **Wiring** 

Locate SSRs as far from motor leads as possible to prevent malfunction from induced current. 

Use shielded wires for input leads when they are exposed to a source of induced current. 

## **Mounting** 

Use #6 – 32 screws, flat washers, and lock washers to secure mounting on heat sinks. 

Vertical mounting is recommended to allow air to flow unimpeded. Horizontal or inverted mounting is possible, but the SSR must be derated according to the derating curves on the following page. 

## **Additional Information** 

Do not exceed the load voltage and current specifications. 

A small-capacity load may not turn off due to the leakage current present after the SSR has turned off. If this is the case, use a resistor in parallel with the load to shunt the leakage current. Observe the polarity of input terminals. Failure to do so may cause damage to the SSR. 

When the SSR output is subjected to a higher than rated voltage, a varistor or other element should be connected to the output terminals to absorb the over-voltage. 

When the input signal contains a ripple voltage, the lowest ripple amplitude should exceed the minimum pick-up voltage of 4V. 

**==> picture [208 x 60] intentionally omitted <==**

**----- Start of picture text -----**<br>
Over 4V<br>Lowest Voltage<br>0V<br>**----- End of picture text -----**<br>


_**www.idec.com**_ 

_**USA: (800) 262-IDEC or (408) 747-0550,   Canada: (888) 317-IDEC**_ 

_**E-38**_ 

_**Relays**_ 

RSS Series 

**E** 

## **Temperature Derating Curves: RSS Series** 

Derating Curve 10-Amp and 25-Amp 

**==> picture [218 x 124] intentionally omitted <==**

**----- Start of picture text -----**<br>
25<br>20<br>15<br>10 Amp<br>10<br>5<br>20 30 40 50 60 70 80 90 100<br>10 Amp Unit-Free Air<br>25 Amp Unit-Free Air<br>Heatsink<br>Mounted on Heatsink<br>RMS On-State Current (Amps)<br>**----- End of picture text -----**<br>


Derating Curve 50-Amp, 75-Amp, and 90-Amp 

**==> picture [222 x 125] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>90 Amp<br>80 75 Amp Mounted on<br>60<br>50 Amp Heatsink<br>50<br>20<br>50 Amp-Free Air<br>20 30 40 50 60 70 80 90 100<br>90 Amp Unit-Free Air<br>Heatsink<br>Mounted on Heatsink<br>RMS On-State Current (Amps)<br>**----- End of picture text -----**<br>


## Relay Base Temp (°C) 

Relay Base Temp (°C) 

_For information on heat sink size, refer to the Technical Notes on the previous page._ 

## **RSS Dimensions** 

## **RSS Series** 

**==> picture [174 x 224] intentionally omitted <==**

**----- Start of picture text -----**<br>
8-32 Pan Head Screw<br>Large Saddle Clamp<br>1.75" (44.5mm)<br> ø0.187"<br>    1.1" (27.9mm) (4.5mm)<br>1 2<br>-4 3+<br>   0.2"<br>6-32 Pan Head Screw 1.0" (25.4mm) (4.8mm)<br>Small Saddle Clamp<br>R 0.265" (6.7mm)<br>0.09" (2.3mm)<br>2.25" (57.2mm) 1.7" (43.2mm) 1.88" (47.6mm)<br>0.95" (24.1mm)<br>**----- End of picture text -----**<br>


**==> picture [267 x 300] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.9" (48.26mm)<br>RSS-CVR (finger-safe cover)<br>     0.79"<br>   1.075"  (20.07mm)<br>(27.31mm)<br>0.5" (12.70mm)<br>0.37" (9.40mm)<br>Material: Polycarbonate-Clear<br>)(67.31mm<br>2.65"  2.4" (6.96mm)<br>**----- End of picture text -----**<br>


All dimensions in mm. 

_**www.idec.com**_ 

_**USA: (800) 262-IDEC or (408) 747-0550,   Canada: (888) 317-IDEC**_ 

_**E-39**_

Updated at June 5, 2026

Founded in 1945, IDEC is a globally recognized leader in industrial automation, machine safety, and control products. Renowned for pioneering innovations in Human-Machine Interface (HMI) systems, the company is dedicated to creating a safe and efficient harmony between advanced workplace technology and human operators. At the core of IDEC’s extensive portfolio is a comprehensive selection of high-performance relays designed for demanding industrial environments. This includes a broad range of electromechanical power relays, solid-state relays, contactors, and critical safety relays, supported by a wide array of specialized relay accessories to ensure reliable and efficient switching. Beyond switching components, IDEC provides complete solutions for modern control panels and automated systems. Their robust engineering extends to advanced panel displays and instrumentation, precision light sensors, and dependable AC/DC power converters. With additional offerings in industrial switches, visual signaling units, and DIN rail terminal blocks, IDEC equips engineers with the high-quality components required to build secure, next-generation automation infrastructure.

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