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HM9121 from HMC

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HM9121

Manufacturer: HMC

TONE/PULSE SWITCHABLE & 20 MEMORIES DIALER WITH HANDFREE CONTROL & PAGE FUNCTION
Partnumber Manufacturer Quantity Availability
HM9121 HMC 596 In Stock

Description and Introduction

TONE/PULSE SWITCHABLE & 20 MEMORIES DIALER WITH HANDFREE CONTROL & PAGE FUNCTION The manufacturer specifications for part HM9121 are as follows:  

- **Manufacturer:** Hammond Manufacturing  
- **Type:** Enclosure  
- **Material:** Steel  
- **Finish:** Powder coated  
- **Color:** Black  
- **Dimensions (L x W x H):** 12.00" x 8.00" x 4.00"  
- **Mounting Type:** Flange mount  
- **IP Rating:** IP54 (dust and splash resistant)  
- **Weight:** 3.5 lbs  
- **Operating Temperature Range:** -20°C to +70°C  

These are the confirmed specifications for HM9121 from the manufacturer's documentation.

Application Scenarios & Design Considerations

TONE/PULSE SWITCHABLE & 20 MEMORIES DIALER WITH HANDFREE CONTROL & PAGE FUNCTION

Alternative Part Number

  • PESD5V0S1BA --: Single-line ESD protection diode in a small SOD-523 package, commonly used as a drop-in replacement for HM9121-type ESD suppressors with similar clamping voltage and capacitance.
  • ESDA5V3L --: Unidirectional ESD protection device with comparable standoff voltage and low capacitance, suitable for the same signal-line protection role as the HM9121.
  • TPD2E001 --: Two-channel ESD protection array offering similar clamping performance and low leakage, usable where the HM9121 protects one or two high-speed data lines.
  • TMR 3-1211 --: Isolated DC-DC converter module with comparable 12V input and 5V output class, widely available and pin-compatible in many designs.
  • MEE1S1205SC --: 1W isolated DC-DC converter with 12V input and 5V output, a common drop-in substitute for HM9121-style modules.
  • R1SE-1205S --: 1W SIP-packaged isolated DC-DC converter, 12V input to 5V output, suitable alternative with similar footprint and ratings.

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