zener diodes & rectifier diodes

:?: can anyone help me on this? i often see these diodes in circuit designs, however this diodes are not available here in our country, but am sure they have equivalents in the IN400x diodes. here they are:
1. 1S1834 (rectifier) used in logic circuits
2. 1S1585 ( " ) same
3. 1S1588 ( " ) same
4. 1S1886 ( " ) same
5. M8513 ( " ) used in an audio amp.
Zener diodes:
1. 05Z51, 05Z75, 05Z68,
2. 1Z27, 1Z16,
3. 1SZ58
4. 02Z16A
My question on the zeners are these:
1. Does the first 2 digits stand for wattage rating?
2. Does the last 2 digits stand for the voltage rating?
3. Does the last letter (A) stand for tolerance?
Bridge rectifier:
1. BD4B41
2. BD4B42
How do i interpret this numbers to know the PIV and current rating?

Thanx in advance!

1 S 1834 - 400V 1A
1 S 1585 - 90V 150mA Fast reverse recovery time:2ns
1 S 1588 - 35V 120mA " " " " "
1 S 1886 - 200V 1A
M 8513 - forward reference diode 650mV
05 Z 51,05 Z 75,05 Z 68 0.5W serie, 5,1V, 7,5V, 6,8V
1 Z 27 - 1W 27V
1 Z 16 - 1W 16V
1 SZ 58 - 6.5V temp. compensated zener 0.005%/C-grad
02 Z 16A - 200mW, 16V zener

1. Yes
2. Yes
3. Not always

Not found any data about bridge rectifiers. Somebody love Toshiba, all components from this manufacturer....

zener & rectifiers

a million thanx to you my friend, now i can try this gizmos, again thanx. :lol: