RHC2512FT1R24 datasheet, PDF - EEWORLD Datasheet

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RHC2512FT1R24: DescriptionRES 1.24 OHM 1% 2W 2512; CategoryPassive components; File Size242KB，6 Pages; ManufacturerStackpole Electronics Inc; Environmental Compliance

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RHC2512FT1R24 Overview

RES 1.24 OHM 1% 2W 2512

RHC2512FT1R24 Parametric

Parameter Name	Attribute value
resistance	1.24 Ohms
Tolerance	±1%
Power (W)	2W
component	thick film
characteristic	Moisture proof
Temperature Coefficient	±100ppm/°C
Operating temperature	-55°C ~ 155°C
Package/casing	2512 (6432 metric)
Supplier device packaging	2512
size/dimensions	0.248" long x 0.126" wide (6.30mm x 3.20mm)
Height - Installation (maximum)	0.028"（0.70mm）
Number of terminals	2
failure rate	-

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RHC Series

High Power Thick Film Chip Resistor

Stackpole Electronics, Inc.

Resistive Product Solutions

Features:

•

Handles 2W of power

Resistances from 0.1Ω to 1MΩ

RoHS compliant and halogen free

TCR of ± 100 ppm/ºC

1% and 5% tolerances

Runs significantly cooler than standard thick film 2512 chip

Electrical Specifications

Maximum

Working

Voltage

(1)

Type / Code

Package

Type

Power Rating

(Watts) @ 70ºC

Maximum

Overload

Voltage

Resistance

Temperature

Coefficient

Ohmic Range (Ω) and Tolerance

1%, 5%

RHC2512

2512

200V

Note: (1) Lesser of √P*R or maximum working voltage

400V

±100 ppm/ºC

0.1 - 1M

Please refer to the High Power Resistor Application Note (page 4) for more information on designing and implementing

high power resistor types.

Mechanical Specifications

Type / Code

RHC2512

Body Length

0.248 ± 0.008

6.30 ± 0.20

Body Width

0.126 ± 0.008

3.20 ± 0.20

Body Height

0.024 ± 0.004

0.60 ± 0.10

Top Termination

0.028 ± 0.008

0.70 ± 0.20

Bottom Termination

0.087 ± 0.008

2.20 ± 0.20

Unit

inches

Recommended Pad Layout

Type / Code

RHC2512

Total Length

0.315

8.00

Total Width

0.138

3.50

Pad Depth

0.118

3.00

Unit

inches

Performance Characteristics

Test

Moisture Resistance

Load Life

Resistance to Soldering

Temperature Cycling

Thermal Shock

Short Time Overload

Insulation Resistance

Typical

±1% + 0.05Ω for <10Ω and ±1% for ≥10Ω

≥1MΩ

Operating Temperature Range: -55ºC to +155ºC

Rev Date: 04/30/2018

This specification may be changed at any time without prior notice

Please confirm technical specifications before you order and/or use.

www.seielect.com

marketing@seielect.com

RHC Series

High Power Thick Film Chip Resistor

Stackpole Electronics, Inc.

Resistive Product Solutions

High Power Chip Resistors and Thermal Management

Stackpole has developed several surface mount resistor series in addition to our current sense resistors,

which have had higher power ratings than standard resistor chips. This has caused some uncertainty and

even confusion by users as to how to reliably use these resistors at the higher power ratings in their designs.

The data sheets for the RHC, RMCP, RNCP, CSR, CSRN, CSRF, CSS, and CSSH state that the rated

power assumes an ambient temperature of no more than 100 degrees C for the CSS / CSSH series and

70°C for all other high power resistor series. In addition, IPC and UL best practices dictate that the combined

temperature on any resistor due to power dissipated and ambient air shall be no more than 105°C. At first

glance this wouldn’t seem too difficult, however the graph below shows typical heat rise for the CSR ½ 100

milliohm at full rated power. The heat rise for the RMCP and RNCP would be similar. The RHC with its

unique materials, design, and processes would have less heat rise and therefore would be easier to

implement for any given customer.

The 102°C heat rise shown here would indicate there will be additional thermal reduction techniques needed

to keep this part under 105°C total hot spot temperature if this part is to be used at 0.75 watts of power.

However, this same part at the usual power rating for this size would have a heat rise of around 72°C. This

additional heat rise may be dealt with using wider conductor traces, larger solder pads and land patterns

under the solder mask, heavier copper in the conductors, via through PCB, air movement, and heat sinks,

among many other techniques. Because of the variety of methods customers can use to lower the effective

heat rise of the circuit, resistor manufacturers simply specify power ratings with the limitations on ambient air

temperature and total hot spot temperatures and leave the details of how to best accomplish this to the

design engineers. Design guidelines for products in various market segments can vary widely so it would be

unnecessarily constraining for a resistor manufacturer to recommend the use of any of these methods over

another.

Note:

The final resistance value can be affected by the board layout and assembly process, especially the size of the

mounting pads and the amount of solder used. This is especially notable for resistance values ≤ 50mΩ.

This should be taken into account when designing.

Rev Date: 04/30/2018

This specification may be changed at any time without prior notice

Please confirm technical specifications before you order and/or use.

www.seielect.com

marketing@seielect.com

RHC Series

High Power Thick Film Chip Resistor

Stackpole Electronics, Inc.

Resistive Product Solutions

RoHS Compliance

Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to

meet the various regulatory requirements now prevalent, such as the European Union’s directive regarding “Restrictions

on Hazardous Substances” (RoHS 2). As part of this ongoing program, we periodically update this document with the

status regarding the availability of our compliant components. All our standard part numbers are compliant to EU

Directive 2011/65/EU of the European Parliament.

RoHS Compliance Status

Standard

Product

Series

RHC

Description

Package /

Termination

Type

SMD

Standard

Series

RoHS

Compliant

YES(1)

Lead-Free Termination

Composition

Lead-Free

Mfg. Effective Date

(Std Product Series)

Jul-04

Lead-Free

Effective Date

Code

(YY/WW)

04/27

High Power Thick Film

Surface Mount Chip Resistor

Note (1): RoHS Compliant by means of exemption 7c-I.

100% Matte Sn over Ni

“Conflict Metals” Commitment

We at Stackpole Electronics, Inc. are joined with our industry in opposing the use of metals mined in the “conflict region”

of the Eastern Democratic Republic of the Congo (DRC) in our products. Recognizing that the supply chain for metals

used in the electronics industry is very complex, we work closely with our own suppliers to verify to the extent possible

that the materials and products we supply do not contain metals sourced from this conflict region. As such, we are in

compliance with the requirements of Dodd-Frank Act regarding Conflict Minerals.

Compliance to “REACH”

We certify that all passive components supplied by Stackpole Electronics, Inc. are SVHC (Substances of Very High

Concern) free and compliant with the requirements of EU Directive 1907/2006/EC, “The Registration, Evaluation,

Authorization and Restriction of Chemicals”, otherwise referred to as REACH. Contact us for complete list of REACH

Substance Candidate List.

Environmental Policy

It is the policy of Stackpole Electronics, Inc. (SEI) to protect the environment in all localities in which we operate. We

continually strive to improve our effect on the environment. We observe all applicable laws and regulations regarding

the protection of our environment and all requests related to the environment to which we have agreed. We are

committed to the prevention of all forms of pollution.

Rev Date: 04/30/2018

This specification may be changed at any time without prior notice

Please confirm technical specifications before you order and/or use.

www.seielect.com

marketing@seielect.com

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