Hammond 850HA Sealed 150/600:300/1200 Ohm Hybrid Transformer
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Create Free Business AccountKey Features
- Line isolation or hybrid: 150/600 ohm primary to 300/1200 ohm secondary
- Nominal winding resistance 70 ohms primary / 140 ohms secondary (+/- 20%)
- +/- 0.5 dB from 20 Hz to 20 kHz; +15 dBm max power level
- Sealed, tin plated deep-drawn steel case with two 6-32 studs and hardware
- Electrostatic shield between windings on the green lead; humbucking construction
- Balanced split windings, reversible primary/secondary for impedance matching
- RoHS and REACH compliant
The 850HA is a sealed, broadcast-quality 850A Series transformer for line isolation or hybrid use where the secondary needs twice the primary impedance. It has a nominal 150/600 ohm primary and a 300/1200 ohm secondary, with nominal winding resistance of 70 ohms primary and 140 ohms secondary (+/- 20%).
Across the series, frequency response is +/- 0.5 dB max. from 20 Hz to 20 kHz, insertion loss is approximately 1 dB, maximum power level is +15 dBm with the specified characteristics, and distortion is approximately 1.5% at 20 Hz under full power. The sealed case and internally wax potted core are intended for stable characteristics and long life.
An electrostatic shield between primary and secondary is connected to the green lead. Humbucking construction and balanced split windings on both sides add circuit versatility, and the primary may be used as the secondary and vice versa for impedance matching.
The case is deep-drawn steel with a tin plated finish, sealed, and fitted with two 6-32 mounting studs; mounting hardware is included. Leads are a minimum of 4" long. The listed overall dimensions are A 1.20 in (30 mm), B 1.70 in (43 mm), C 1.65 in (42 mm) and D 1.32 in (34 mm). The 850HA is RoHS and REACH compliant, with a listed shipping weight of 0.45 lbs (0.20 kg) and UNSPSC 39121301.
Ideal For
- Hybrid circuits
- Line isolation with impedance step-up
- Broadcast audio interfaces
- Audio impedance matching
Overview
| Series | 850A Series (Audio Broadcast Quality, Sealed) |
| Application | Line Isolation or Hybrid |
| Product Type | Audio transformer, broadcast quality, sealed, with wire leads |
| Short Description | AUDIO TX B-CAST W/ LEADS |
Dimensions
| Dimension A | 1.20 in (30 mm) |
| Dimension B | 1.70 in (43 mm) |
| Dimension C | 1.65 in (42 mm) |
| Dimension D | 1.32 in (34 mm) |
Electrical
| Distortion (Series) | Approx. 1.5% @ 20 Hz under full power |
| Maximum Power Level | +15 dBm with specified characteristics (higher levels with reduced low frequency performance) |
| Primary Nominal Impedance | 150/600 ohms |
| Primary Nominal Resistance | 70 ohms +/- 20% |
| Frequency Response (Series) | +/- 0.5 dB max. from 20 Hz to 20 kHz (units over 5K ohms impedance may be down 1 dB @ 20 kHz) |
| Secondary Nominal Impedance | 300/1200 ohms |
| Secondary Nominal Resistance | 140 ohms +/- 20% |
Identifiers
| UPC | 623980037011 |
| UNSPSC | 39121301 |
| Part Number | 850HA |
Packaging & Shipping
| Shipping Weight | 0.45 lbs (0.20 kg) |
| Series Shipping Weight (Spec Sheet) | 0.4 lb. (0.18 kg) |
Construction & Finish
| Case | Deep-drawn steel case, tin plated finish, sealed |
| Core | Wax potted core internally (series sheet) |
| Leads | Minimum 4" lead length |
| Mounting | Two 6-32 mounting studs; mounting hardware included |
| Windings | Balanced split windings on primary & secondary; primary may be used as secondary and vice versa for impedance matching |
| Construction | Humbucking |
| Electrostatic Shield | Between primary & secondary, connected to the green lead |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What impedances does the 850HA have?▾
A nominal 150/600 ohm primary and a 300/1200 ohm secondary.
How does the 850HA differ from the 850GA?▾
Both are line isolation or hybrid units with a 150/600 ohm primary; the 850HA has a 300/1200 ohm secondary instead of 150/600 ohms.
Is the 850HA sealed?▾
Yes. The 850HA is in a sealed, tin plated deep-drawn steel case.
How is the 850HA mounted?▾
It has two 6-32 mounting studs, and mounting hardware is included. Leads are a minimum of 4" long.
Which lead is the shield on the 850HA?▾
The electrostatic shield between primary and secondary is connected to the green lead.
Is the 850HA RoHS and REACH compliant?▾
Yes, it is listed as both RoHS compliant and REACH compliant.
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