販売終了(DISCONTINUED)POWER - NIKKOHM
500W ⽔冷⾼電⼒抵抗器
500W WATER COOLING NON-INDUCTIVE
HIGH POWER RESISTORS

RPH500Features and Applications

特⻑ 用途
動作中の抵抗器の温度が極めて低い⼩型５００Ｗ⽔冷抵抗器。平板無誘導抵抗体とツイストペア用のリード線と特殊な端子構造（特許）で構成した抵抗器。
広帯域の⾼周波特性によって優れたサージ吸収性能を発揮。
抵抗体は⽔冷筐体から⾼純度アルミナ基板で絶縁され、５ＫＶの耐電圧を保証。
リード線の種類、⻑さ、端末処理、⽔⼝形状は、任意のご要望に応じることができます。
電⼒変換逆変換システム、産業用機器の電源、⾼出⼒ＡＣモータ制御機器のサイリスタ、ＩＧＢＴなどのスナバ抵抗器。

外形寸法 Dimensions (mm)Small sized 500W water-cooled non-inductive resistor
with a very low resistor temperature under operation.
Flat plate resistance and twisted pair leads and special
terminal structure (patent) are shown excellent serge
absorption performances.
Resistors are insulated from case by the high purity
alumina substrate, and are guaranteed to voltage-proofof 5kV.
Leads type, length, terminal processing (patented), andhose connection can be accepted arbitrary demands.
Surge suppression resistors for power thyristor andIGBT, used in power supply of electric power conversion
system and of industrial apparatus, high output AC motorcontrols.

90.0(40.0)(21.0)

30.0φ12.750.0

30.032.5
Hose mouth:
Nitta Moore DC10-PT3/8

φ10.0

15.0
30.0
70.0

2-M5 depth 6Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: +81-176-53-2105, FAX: +81-176-53-2106© Nikkohm Co., Ltd. All rights reserved. URL: http://www.nikkohm.co.jp & https://www.nikkohm.com / e-mail: info@nikkohm.co.jp

POWER - NIKKOHM
５００Ｗ⽔冷⾼電⼒抵抗器
500W WATER COOLING NON-INDUCTIVE HIGH POWER RESISTORS

RPH500仕様性能 Specifications and Performances
公称抵抗値
製作抵抗値範囲
抵抗温度係数抵抗値許容差等価直列インダクタンス
等価並列キャパシタンス
ホース継手
冷却⽔温度
冷却⽔量
冷却⽔圧⼒損失
冷却⽔温度上昇
ケース温度上昇
抵抗⾯温度上昇
抵抗⾯最⾼温度
定格電⼒
最⾼使用電⼒最大連続インパルス
破壊点インパルス
端子線
耐電圧
最⾼使用電圧
絶縁抵抗
負荷寿命
耐湿性
重量

形名呼称・Specifications
ResistanceResistance Range
TCRTolerance
Series Inductance
Parallel Capacitance
Hose Mouth
Water Temperature
Volume of Water Flow
Water Pressure Loss
Water Temperature Rise
Case Temperature Rise
Surface Temperature Rise
Surface Temperature Rise
Rating Power
Max. Applied Power
Max. Continuous Impulse Load
Damaged Impulse Load
Terminal Codes
Dielectric Strength
Max Operating Voltage
Insulation ResistanceLoad Life
Humidity
WeightAny Value (odd value will be under MOQ 100pcs)
0.1Ω-1KΩ
+/-250ppm/ °CC+/-10%
40nH/dual resistor, (Typical)
160pF/dual resistor, (Typical)
Standard: Nipple, any types are available.
+41°C maximum at inlet, more than the dew point
2 litters/minutes minimum.
0.06Kg/(cm*cm)
1.4 °C
14 °C
50 °C
Maximum 110 °C
500W (250W/resistor element）
700W (350W/resistor element)
Peak Power 37KW/10us/10KHz (Only for reference)
100KW peak power/70us single and 37KW peak power/34us continuous.
Teflon Insulated Wire（0.18/30, outer diameter 2mm, Blue）, 200mm length.
AC2000V, 60 seconds. (Between terminals and case)
AC1000V
1000MΩminimum. (Between terminals and case)+/-2% (Rating 500W, 1000 hours)+/-2%(Rating*0.1, 1000hours, continuous load)
350 grams

Ordering Information

ModelTCR
Resistance
RPH500
H20 Ohm|||
RPH500H (250ppm/K)
0.1 Ohm-1k Ohm
RPH500-000
RPH500-001
RPH500-999
xxx: 3 digits specified code from specification draw, please call factory

端子接続ToleranceK|
K (+/-10%)

Remarks

Schematics & Wiring

１個の抵抗器、RPH500 には、通常、２個の抵抗素子が取り付けてあり、抵抗器内部の接続⽅法は、［直列］［並列］［独⽴］の３種類が可能です。
標準の接続⽅法は直列です。形名呼称にて、20 Ohm と指定すれば、直列接続で、20 Ohm になった製品をお届けいたします。リード線⻑さ、端子接続⽅法をご指定なさる場合は、工場に連絡ください。

A resistor includes a couple of resistor elements and has following three ways connection. Series connection is standard,
but if customer request specified connection and fly-lead length, please call our factory.

Series Connection

Parallel Connection

Separate Connection

Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: +81-176-53-2105, FAX: +81-176-53-2106© Nikkohm Co., Ltd. All rights reserved. URL: http://www.nikkohm.co.jp & https://www.nikkohm.com / e-mail: info@nikkohm.co.jp

POWER - NIKKOHM
500W ⽔冷⾼電⼒抵抗器

RPH500500W WATER COOL NON-INDUCTIVE HIGH POWER RESISTORS
温度上昇・Temperature Rise Characteristics
Resistor Surface Temperature Rise

Case Temperature Risedegrees C

Water Flow
1litter/min.
3 litter/min.
5 litter/min.
7 litter/min.

10080°C

2060

1540

1020

500250500

750

Water Flow
5 litter/min.
7 litter/min.

2501000

0250

500

750

Applied Power(W)RPH500 の推奨動作状態

1000Applied Power(W)Recommended Long Life Actual Application of RPH500 snubber.

20 Ω20 Ω0.05uF

サイリスタコンバータ CR スナバ抵抗

CRD スナバ抵抗

20Ω
10 Ω

CRD スナバ抵抗

LRD スナバ抵抗

Applications

Thyristor
converter

RCsnubber

DCreactor
RPH500ACfilterTo Inverter Section
Leakcurrent
detector

Magneticcontactor

RPH50020220901
Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: +81-176-53-2105, FAX: +81-176-53-2106© Nikkohm Co., Ltd. All rights reserved. URL: http://www.nikkohm.co.jp & https://www.nikkohm.com / e-mail: info@nikkohm.co.jp