# 4289 Pomona Coaxial Adapter New

**Additional Features:**

-   Adapter, SMA (Female) to BNC (Male)
-   Converts instruments with BNC inputs to SMA.
-   Adapter and contacts are gold-plated for low contact resistance

**Materials**

-   Body: Gold-Plated Beryllium Copper
-   BNC Contact: Gold-Plated Brass
-   SMA Contact: Gold-Plated Beryllium Copper
-   Dielectric: PTFE
-   Finish: Gold-Plated per MIL-G-45204, Type II, Class 2

**Ratings**

-   Voltage: For CE compliance and for personal safety, do not hold in hand when voltages exceed
-   30 Vrms/60 Vdc.
-   Maximum voltage for hands free use in controlled testing environments: 335 Vrms Max.
-   Do not use on circuits where transient stresses can exceed the rated voltage.
-   Operating Temperature: -65ºC (-85ºF) to +165ºC (+329ºF)
-   Nominal Impedance: 50 Ohm
-   Frequency Range: 0 – 12.4 GHz

The Pomona 4289 is a straight SMA to BNC Coaxial Adapter with female to male connection. The 4289 features 12.4 GHz maximum frequency, gold-plated beryllium copper body and PTFE per L-P-403 dielectric.

## Details

- **Price:** 19.49 USD
- **Vendor:** Pomona
- **Type:** Coax Adap
- **Tags:** Accessories, Adapter, Coax, Coax Adapter, Manufacturers, Other Equipment, Pomona, product_manual_group_1, Product_new

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 19.49 USD | In stock |

## Images

- 4289 Pomona Coaxial Adapter

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> Source: [ValueTronics](https://valuetronics.com/products/4289-pomona-coaxial-adapter-new)
> Updated: 2026-05-21