Fibre Core Conformal

Coated Wirewound Resistor

SPP Series

UL1412 recognised fusing *

Coated or uncoated units

PositivehighTC’suponrequest

Colorbandstandardidentification

Lowerrangesavailable-contactfactory

Weldableandsolderablemagneticleads

*ULfilenumberE234469

Resistors

Make Possible

09.14

General Note

TT Electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.

© TT Electronics plc

www.ttelectronicsresistors.com

Fibre Core Conformal

Coated Wirewound Resistor

SPP Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

General Note

TT electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT electronics’ own data and is considered accurate at time of going to print.

© TT electronics plc

11.13

* UL file number E234469

General Note

IRC reserves the right to make changes in product specification without notice or liability.

All information is subject to IRC’s own data and is considered accurate at time of going to print.

A subsidiary of

TT electronics plc

• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Alloy resistance

wirewound on

fiberglass core

Mechanically crimped

termination assembly

EIA/MIL color code:

first wide band indicates

wirewound construction,

blue indicator indicates

flameproof

SPP Series

Low-Cost General Purpose

Conformal Coated

Wirewound Resistor

Notes:

Unless specified otherwise, standard test centers are 1 ¾ inches.

Electrical Data

IRC Type

SPP-1

SPP-2

SPP-3

Resistance - Std.

UL Recognised Range

0.1

Ω to 1200

1

to 470

1

to 470

Ω

0.1

Ω to 2400Ω

0.1

Ω to 2400Ω

Tolerance - Std.

±5% (E24), ±10% (E12)

Power Rating

1 watt @ 85°C

3/4 watt @ 105°C

1/2 watt @ 125°C

Derating to 0 @ 160°C

2 watt @ 85°C

1 watt @ 140°C

---

---

3 watt @ 85°C

2 watt @ 145°C

1 watt @ 190°C

---

---

Load Life Stability

1 watt @ 85°C ± 10%

2 watt @ 85°C ± 10%

3 watt @ 85°C ± 10%

Max. Continuous

Working Voltage

Min. Insulation

Resistance

10,000 Meg

100 Meg

10,000 Meg

100 Meg

10,000 Meg

100 Meg

Min. Dielectric

Withstanding Volts

(RMS)

600V

600V

600V

Current Noise

Negligible

Negligible

Negligible

Temperature Rise at

Rated Load, 25°C Ambient

Approx. 150°C

Approx. 200°C

Approx. 225°C

Temperature Coefficient

±600/°C

0.10

Ω - 0.91Ω

±300/°C

1

Ω - 1200Ω

±600/°C

0.10

Ω - 0.91Ω

±300/°C

1

Ω - 2400Ω

±600/°C

0.10

Ω - 0.91Ω

±300/°C

1

Ω - 2400Ω

Dry

Wet

SPP Series Issue December 2008 Sheet 1 of 3

General Note

IRC reserves the right to make changes in product specification without notice or liability.

All information is subject to IRC’s own data and is considered accurate at time of going to print.

A subsidiary of

TT electronics plc

• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Alloy resistance

wirewound on

fiberglass core

Mechanically crimped

termination assembly

EIA/MIL color code:

first wide band indicates

wirewound construction,

blue indicator indicates

flameproof

SPP Series

Low-Cost General Purpose

Conformal Coated

Wirewound Resistor

Notes:

Unless specified otherwise, standard test centers are 1 ¾ inches.

Electrical Data

IRC Type

SPP-1

SPP-2

SPP-3

Resistance - Std.

UL Recognised Range

0.1

Ω to 1200

1

to 470

1

to 470

Ω

0.1

Ω to 2400Ω

0.1

Ω to 2400Ω

Tolerance - Std.

±5% (E24), ±10% (E12)

Power Rating

1 watt @ 85°C

3/4 watt @ 105°C

1/2 watt @ 125°C

Derating to 0 @ 160°C

2 watt @ 85°C

1 watt @ 140°C

---

---

3 watt @ 85°C

2 watt @ 145°C

1 watt @ 190°C

---

---

Load Life Stability

1 watt @ 85°C ± 10%

2 watt @ 85°C ± 10%

3 watt @ 85°C ± 10%

Max. Continuous

Working Voltage

Min. Insulation

Resistance

10,000 Meg

100 Meg

10,000 Meg

100 Meg

10,000 Meg

100 Meg

Min. Dielectric

Withstanding Volts

(RMS)

600V

600V

600V

Current Noise

Negligible

Negligible

Negligible

Temperature Rise at

Rated Load, 25°C Ambient

Approx. 150°C

Approx. 200°C

Approx. 225°C

Temperature Coefficient

±600/°C

0.10

Ω - 0.91Ω

±300/°C

1

Ω - 1200Ω

±600/°C

0.10

Ω - 0.91Ω

±300/°C

1

Ω - 2400Ω

±600/°C

0.10

Ω - 0.91Ω

±300/°C

1

Ω - 2400Ω

Dry

Wet

SPP Series Issue December 2008 Sheet 1 of 3