Product Overview
Teledyne SSP Solid State Relay, 3-28VDC Control In, 5 Amp 250VAC Out
Condition
New, unused stock, sold each. The silver front label is clean and fully legible: TELEDYNE SSP, P/N: 601-1403, SOLID STATE RELAY, with CONTROL 3-28 VDC beside terminals 1 (+) and 2 (-), LOAD 5 AMP/250 VAC 50/60 HZ beside terminals 3 and 4, a patent number reading PAT NO 3,648,075, and UL and CSA agency marks. The back of the black molded case carries TELEDYNE RELAYS pressed into a raised ring around the center mounting hole. All four screw terminals and their captive washers are bright, with no wire witness marks, no burnishing and no discoloration on the terminal plates. One side of the case shows factory ink marking that is only partly legible in the photographs, so we do not read a date or lot code from it. One piece was taken out for photography; the markings shown are the spec for the photographed piece, and small marking or ink differences are normal across the rest of the stock.
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Product Overview
This is a Teledyne SSP series solid state relay, part number 601-1403, in the compact black molded case with four screw terminals on one face and a single center mounting hole for panel or bracket mounting. The label sets the job out plainly: a low voltage DC control input of 3 to 28 VDC on terminals 1 (+) and 2 (-), switching an AC load of 5 amps at 250 VAC, 50/60 Hz on terminals 3 and 4. It is the part you reach for when a control card or a PLC output needs to switch an AC load without a coil, contacts or the arcing that goes with them. The label also carries UL and CSA marks and the patent number 3,648,075, which is how a great deal of older Teledyne Relays product is identified when the paperwork is long gone. Ratings beyond what is printed on the label - off-state leakage, minimum load, thermal derating - are not confirmed here; verify them against Teledyne data before designing it in.
Key Features
- Manufacturer part number: Teledyne SSP 601-1403, printed on the front label
- Control input: 3 to 28 VDC, terminal 1 positive, terminal 2 negative
- Load rating per label: 5 amps at 250 VAC, 50/60 Hz, terminals 3 and 4
- Agency marks on the label: UL and CSA
- Patent number on label: 3,648,075
- Four screw terminals with captive washers, all on one face
- Black molded case with a single center mounting hole, TELEDYNE RELAYS molded on the back
- Sold each; stock on hand is three pieces
Applications
- Maintenance technician replacing a failed solid state relay on an older Teledyne-equipped control panel and matching the 601-1403 number exactly
- Controls builder driving a 120 or 240 VAC heater, solenoid or small motor starter from a 5V or 24V logic output
- Machine rebuilder swapping a chattering mechanical relay out of a legacy chassis for a contactless switch of the same rating class
- Lab or test bench user needing a screw-terminal AC switch that a 12V DC supply can drive directly
Frequently Asked Questions
Which terminals are the control side and which are the load?
The label answers it directly. Terminals 1 and 2 are the DC control input, 1 marked positive and 2 marked negative, rated 3 to 28 VDC. Terminals 3 and 4 are the load side, shown on the label as a switch symbol and rated 5 amps at 250 VAC, 50/60 Hz.
Can it switch a DC load, or more than 5 amps?
The printed rating is AC only: 5 amps, 250 VAC, 50/60 Hz. There is no DC load rating on the label and no higher current rating shown, so treat anything beyond the printed values as not confirmed and check Teledyne data for the 601-1403 before applying it outside those numbers.
Does it need a heat sink or a specific mounting?
The case has one center hole for a screw through a panel or bracket, which is how these were normally mounted. Heat sinking requirements and thermal derating are not printed on the label and are not confirmed here, so verify them against the datasheet if you plan to run near the full 5 amps continuously.
Will the piece I receive look exactly like the photographs?
You receive one relay. The photographed piece is the one we opened for the camera, and its label and molding are what you see. We do not guarantee identical ink marking on the other pieces in stock, since factory marking varies from run to run; the part number, ratings and agency marks are what carry across.
Why buy this single relay here instead of taking a chance on a surplus lot?
Because this one is known. It is photographed from three sides, its label is legible in the pictures, its ratings are the ones printed on the part rather than a guess from a catalog, and it is priced and sold as one piece. A mixed relay lot or an auction pallet may or may not contain a 601-1403, and you cannot read its label before it arrives. Here you buy the exact relay you looked at, and if it does not suit you our satisfaction guarantee stands behind it. Shipping is a flat $8, free once your order passes $28, and orders leave the Idaho warehouse the same or next business day.
Teledyne molded its name into the back of this one and printed the patent number on the front, from the days when switching AC without contacts was still worth patenting. Land your control leads on 1 and 2, and let it do quietly what a mechanical relay used to make noise about.
