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S203, S203M, S203A, S203AM
S203, S203M, S203A, S203AM
The Jin Tay S203 series is a 19mm key switch lock that turns an equipment circuit on or off only when the correct key is inserted and rotated. It is supplied with screw terminals (S203) or spade terminals (S203A), in maintained or spring-return momentary versions.
The S203 series is a two-position key switch lock with a zinc alloy die-cast housing and cylinder in bright chrome finish, operated by a double-bitted flat brass key. The key provides physical authentication, ensuring that only authorized personnel can operate equipment or electrical circuits. Behind the cylinder, the cam or switching mechanism translates key rotation into controlled mechanical movement or electrical contact engagement.
Buyers choose the terminal style and the contact action.
| Version | Terminals | Contact action |
|---|---|---|
| S203 | Screw terminals | Maintained OFF/ON |
| S203A | Spade terminals | Maintained OFF/ON |
| S203M | Screw terminals | Spring-return momentary |
| S203AM | Spade terminals | Spring-return momentary |
The S203B, a version with post terminals, is listed on the S203B series page. On the maintained versions the key can be withdrawn in one position or in both; on the momentary versions it is withdrawn at the rest position. The lock is fixed to the panel with a hex nut. For background on position counts and momentary action, see how many positions a key switch lock has.
Control panels and industrial control boxes, instruments and metering equipment, alarm and security devices, and vending or gaming machines.
Wire soldering to the terminals, laser engraving, marking and keyed-alike or keyed-different programs are handled in production. Jin Tay has manufactured key switch locks in Taiwan since 1980 and was the first manufacturer in Taiwan to develop the 12mm key switch lock.
RoHS 2.0 (2011/65/EU) and REACH compliant. The S203, S203A, S203M and S203AM are UL certified. The S203B and S203BM are not UL-certified. The certificate reference is stated on the specification sheet supplied with your quotation.
Two-stage switch design, the switch functions OFF-ON (SPST), the key can be withdrawn at the 12 o'clock position only, or at both the 12 o'clock and 3 o'clock positions, S203 has screw terminals, S203A has spade terminals, and there is another spring load for momentary contact and key return at 3 o'clock instantaneous power return, only 12 o'clock out. According to customer needs to increase the processing process, such as: wire soldering, laser engraving, marking..... etc. because of convenient production quantity, it can also be customized according to customer needs.
19mm diameter, hex nut mounting
Two-position OFF/ON; maintained (S203, S203A) or spring-return momentary (S203M, S203AM)
Screw terminals (S203) or spade terminals (S203A)
Key withdrawal in one or both positions on maintained versions
Wire soldering, laser engraving and key programs to order
RoHS 2.0 and REACH compliant; S203, S203A, S203M and S203AM are UL certified
Contact Rating: 4A 125VAC, 2A 250VAC.
Contact Resistance: 50Milli-Ohms Max.
Insulation Resistance: 109 Ohm Min.
Dielectric Strength: 1000 VAC -1 Minute.
Refer to drawings, samples, etc. as the confirmation of product specification before placing the order.
After the order confirmed, the cancellation of the order or change the order contents can be allowed within 7 days from the date of receiving the order.
Delivery time: Estimated delivery time for standard product orders of 3,000pcs is within 45 days.
The minimum order quantity of the product is 500PCS/lot, and the order of "price based on quantity" also can be accepted (for details, please negotiate with the salesman)
Products can be customized according to customer requirements, as: Key combination, parts configuration, wire soldering process, surface treatment, key extraction position, adding anti-vibration, dust-proof, anti-static, and other functions.
RoHS 2.0 (2011/65/EU) and REACH compliant; S203, S203A, S203M and S203AM are UL certified; S203B and S203BM are not.
The test report of the specified project can be provided according to the customer requested.
The two models share the same 19mm lock body and two-position OFF/ON switching; they differ at the rear. The S203 has screw terminals; the S203A has spade terminals. Both mount with a hex nut and use the same double-bitted flat brass key, so the choice depends on the wiring method of the equipment. Each is also built as a momentary version — S203M and S203AM — in which a spring returns the key when it is released. Jin Tay supplies drawings for every version so the terminal style, key withdrawal position and switching action can be confirmed before an order is placed.
The S203 series is specified wherever a machine or circuit should be switched only by an authorized key holder: control panels and industrial control boxes, instruments and metering equipment, alarm and security devices, and vending or gaming machines. It is a power-control component, selected by panel cutout, switching action and terminal style. The key provides physical authentication, ensuring that only authorized personnel can operate equipment or electrical circuits. Tell Jin Tay the equipment type and wiring method, and the sales team will recommend the matching version.
In the momentary versions, S203M and S203AM, the second position is spring-loaded. The circuit is switched only while the operator holds the key in that position; once released, the spring returns the key to its rest position. A familiar example is a storage compartment release: the key is turned, the compartment opens, and the key returns by itself. Buyers choose momentary action for reset or release functions, and the maintained S203 or S203A when the circuit should stay on until the key is turned back.
Yes. For OEM quantities Jin Tay can deliver the S203 series with wires soldered to the terminals, laser engraving or marking, and keyed-alike or keyed-different programs, so the part arrives ready for assembly. Terminal style and contact action are chosen from the four versions, and drawings are supplied for approval before production. Jin Tay has manufactured locks in Taiwan since 1980 and operates under ISO 9001 quality management. Minimum order quantities and lead times depend on the configuration; send your drawing or sample to Jin Tay for a quotation.
