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DISCRETE SEMICONDUCTORS
DATA SHEET
BZX79 series
Voltage regulator diodes
NXP Semiconductors
Product data sheet
Voltage regulator diodes
BZX79 series
FEATURES
• Total power dissipation: max. 500 mW• Two tolerance series: ±2%, and approx. ±5%• Working voltage range: nom. 2.4 to 75 V (E24 range)• Non-repetitive peak reverse power dissipation: APPLICATIONS
• Low voltage stabilizers or voltage references.
DESCRIPTION
Low-power voltage regulator diodes in hermetically sealed leaded glass SOD27 (DO-35) packages. The diodes are available in the normalized E24 ±2% (BZX79-B) and approx. ±5% (BZX79-C) tolerance range. The series consists of 37 types with nominal working voltages from 2.4 to 75 V.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
PARAMETER
CONDITIONS
Device mounted on a printed circuit-board without metallization pad; lead length max.
Tie-point temperature ≤ 50 °C; max. lead length 8 mm.
ELECTRICAL CHARACTERISTICS
Total BZX79-B and BZX79-C series
Tj = 25 °C unless otherwise specified.
PARAMETER
CONDITIONS
PARAMETER
CONDITIONS
Per type, BZX79-B/C2V4 to BZX79-B/C24
Tj = 25 °C unless otherwise specified.
WORKING VOLTAGE
DIFFERENTIAL RESISTANCE
TEMP. COEFF.
DIODE CAP.
NON-REPETITIVE PEAK
rdif (Ω)
SZ (mV/K)
REVERSE CURRENT
at IZtest = 5 mA
at IZtest = 5 mA
at f = 1 MHz;
at tp = 100 μs; Tamb = 25 °C
Tol. approx.
Tol. ±2% (B)
Ztest = 1 mA
at IZtest = 5 mA
Per type, BZX79-B/C27 to BZX79-B/C75
Tj = 25 °C unless otherwise specified.
WORKING VOLTAGE
DIFFERENTIAL RESISTANCE
TEMP. COEFF.
DIODE CAP.
NON-REPETITIVE PEAK
rdif (Ω)
SZ (mV/K)
REVERSE CURRENT
at IZtest = 2 mA
at IZtest = 2 mA
at f = 1 MHz;
at tp = 100 μs; Tamb = 25 °C
Tol. approx.
Tol. ±2% (B)
Ztest = 0.5 mA
at IZtest = 2 mA
THERMAL CHARACTERISTICS
PARAMETER
CONDITIONS
thermal resistance from junction to tie-point lead length 8 mm.
thermal resistance from junction to ambient lead length max.; see and note Device mounted on a printed circuit-board without metallization pad.
GRAPHICAL DATA
Fig.2 Thermal resistance from junction to ambient as a function of pulse duration.
(1) Tj = 25 °C (prior to surge).
(2) T Typical forward current as a function of reverse power dissipation versus duration.
BZX79-B/C2V4 to BZX79-B/C4V3.
BZX79-B/C4V7 to BZX79-B/C12.
Temperature coefficient as a function of Temperature coefficient as a function of PACKAGE OUTLINE
Hermetically sealed glass package; axial leaded; 2 leads
DIMENSIONS (mm are the original dimensions)
1. The marking band indicates the cathode.
REFERENCES
EUROPEAN
ISSUE DATE
PROJECTION
DATA SHEET STATUS
DOCUMENT
DEFINITION
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Limiting values ⎯ Stress above one or more limiting
values (as defined in the Absolute Maximum Ratings
System of IEC 60134) may cause permanent damage to
the device. Limiting values are stress ratings only and
operation of the device at these or any other conditions
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