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RRA-Rotating Rectifier Assembly

Rectifier Diodes for Alternators
 

DO4 Package 16Amp/25Amp Stud mounted diffused junction Silicon rectifiers are specially designed for rotating applications. Available in reverse (Stud is anode) SPR and normal (Stud is cathode) SPN polarity. It provides high current operation with minimum space requirements. At high junction temperature, it has low forward voltage drop and low thermal impedance.
Features

 
  Glass passivated chips High surge current capacity  
  Voltage:800-1800V Spin test/Pull test  
     
 
Characteristics
16Amp
25Amp
Maximum Forward Average Current
IF(AV)

16

25

Maximum Forward R.M.S. current
IF(RMS)

25

42

Maximum peak one cycle (Non-rep.)    Surge current (10 ms.)

IFSM

300

400

Maximum I2t Rating for 5 to 10msec at Tc=25°C

I2t

450

800

Maximum Average Reverse Leakage current Tc=25°C (Tc=125°C)

IR(AV)

IR(AV)

500
5

500
5

Maximum full load voltage drop 25°C

full cycle at Tc=135°C

VFM

1.4
1.090

1.5
0.995

Thermal Resistance junction to Case

Rthjc

1.2

0.8

Thermal resistance case to heatsink

Rthch

0.50

0.35

 
 
   
     
 
Do5 package in M6 / M8 / (1/4” UNF) for 40Amp 70Amp 95Amp
 
 
Characteristics
40Amp
70Amp
95Amp
Maximum Forward Average Current
IF(AV)

40

70

95

Maximum Forward R.M.S. current
IF(RMS)

65

110

152

Maximum peak one cycle (Non-rep.)Surge current (10 ms.)

IFSM

500

1200

2090

Maximum I2t Rating for 5 to 10msec at Tc=25°C

I2t

1200

7200

2000

Maximum Average Reverse Leakage current Tc=25°C(Tc=125°C)

IR(AV)IR(AV)

500
5

500
5

500
5

Thermal Resistance junction to Case

Rthjc

0.85

0.55

0.28

Thermal resistance case to heatsink

Rthch

0.25

0.20

0.2

 
 
 
 
     
 
Half Bridge Diode modules
 
 
SPE introduces half bridge diode modules for alternators. Diode modules manufacturred in 25Amp, 40amp and 70amp configuration with non-isolated and isolated base plates. These modules do not require soldering of terminals and easy to mount /dismount reducing error in connection and mounting.
 
 
Alternator Diode Module
isolated Alternator Diode module