Mfr Part #:

39-251

The Grayhill Inc. 39-251 is an SPDT pushbutton switch designed for PC mounting. It offers a rating of 150mA at 28Vdc and operates within a temperature range of -40°C to +125°C.

✓ Total Stock: 25 pcs

$ Price Range: $0.75

39-251 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Bristol Electronics ✓ Non-Authorised Inventory information	25 pcs On Request	25 pcs	On Request	1	On Request	On Request	2026-02-25 06:16:38	On Request	On Request

39-251 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Grayhill Inc.
Contact Resistance	25 mOhms
Insulation Resistance	1000 MOhms
Mounting Type	PC Mount
Operating Temperature	-40°C to +125°C
SVHC Present	Not Present

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39-251 Description

Short technical summary and product information.

The Grayhill Inc. 39-251 is a Single Pole Double Throw (SPDT) pushbutton switch suitable for PC board mounting. This switch is constructed with durable materials including a Nylon button, Polyester base and cover, and gold-plated phosphor bronze shorting bars and terminals.

Key electrical specifications include a contact resistance of 25 milliohms maximum, a voltage breakdown of 1000 Vac, and an insulation resistance of 1000 megohms minimum. It is rated for 150 mA at 28 Vdc, 1/4 Amp at 115 Vac resistive, and 1/8 Amp at 220 Vac resistive. The switch is designed for a minimum of 500,000 operations at its rated load.

Operating within an environmental range of -40°C to +125°C, the 39-251 is built for reliability. The materials used, such as Fluorosilicone for the O-ring and tinned music wire for the spring, ensure performance in various conditions. The switch features momentary action with an actuating force of 10 ± 3 oz. and a total travel of 0.500 ± 0.015 inches.

39-251 Quick Information

Product Type: Pushbutton Switch

Series: Series 39

Canonical Name: Grayhill Inc. 39-251 SPDT Pushbutton Switch

Subcategory: Rotary Switches

39-251 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

39-251 Estimated Pricing

Qty	Low	High
1+	$0.75	$0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

39-251 Features

SPDT circuitry for versatile switching.
Rated for 150mA at 28Vdc.
High insulation resistance of 1000 MOhms.
Wide operating temperature range of -40°C to +125°C.
Durable construction with gold-plated terminals.

39-251 Applications

Suitable for general purpose switching.
Ideal for control panel applications.
Used in electronic test equipment.
Applicable in industrial automation.

39-251 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating temperature range for the 39-251 switch?

The operating temperature range for the 39-251 switch is -40°C to +125°C.

What is the contact resistance of the 39-251 switch?

The contact resistance of the 39-251 switch is a maximum of 25 milliohms on a new switch.

What is the voltage breakdown rating for the 39-251 switch?

The voltage breakdown rating for the 39-251 switch is 1000 Vac between mutually insulated parts.

What is the insulation resistance of the 39-251 switch?

The insulation resistance of the 39-251 switch is a minimum of 1000 megohms.

What are the electrical ratings for the 39-251 switch?

The 39-251 switch is rated for 150 mA at 28 Vdc resistive, 1/4 Amp at 115 Vac resistive, and 1/8 Amp at 220 Vac resistive.

What is the button material for the 39-251 switch?

The button material for the 39-251 switch is Nylon.

What is the mounting type for the 39-251 switch?

The mounting type for the 39-251 switch is PC Mount.