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onsemi 1N5919B
- Part No.:
- 1N5919B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5919B.pdf
- Description:
- DIODE ZENER 5.6V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,979
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Product details
Overview
1N5919B from onsemi is a 3 W, 5.6 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in low-power DC circuits. It delivers stable reverse breakdown at 5.6 V with 66.9 Ω dynamic impedance at 2 mA test current, supports 267 mA maximum DC zener current, and operates across −65°C to +200°C.
For engineers reviewing the 1N5919B datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 5% tolerance, 98 W surge rating (1 ms), ESD robustness (>16 kV HBM), and compatibility with standard leaded PCB assembly processes using 260°C soldering profiles.
Technical Context
The 1N5919B implements a silicon-oxide passivated PN junction optimized for stable Zener operation under steady-state and transient conditions. Its 5.6 V nominal breakdown voltage falls within the low-voltage range where temperature coefficient is near-zero (≈0 mV/°C), minimizing drift in reference and bias applications.
It is rated for 3 W steady-state dissipation at 75°C lead temperature with 24 mW/°C derating, and supports 1 W dissipation at 50°C ambient with 6.67 mW/°C derating. The device uses cathode-band polarity marking and requires no heatsink for typical 100–200 mA regulation loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V @ IZT = 2 mA - ensures precise 5.6 V regulation with ±5% tolerance for stable reference generation |
| Zener Impedance (ZZT) | 66.9 Ω @ IZT = 2 mA - low dynamic resistance maintains regulation accuracy under load variation |
| Max DC Zener Current (IZM) | 267 mA - defines absolute upper current limit before thermal runaway at rated power |
| Surge Power Rating | 98 W @ 1 ms - enables reliable transient overvoltage clamping without failure |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during manual assembly and board-level ESD events |
| Operating Temperature | −65°C to +200°C - supports deployment in automotive under-hood, industrial control, and aerospace environments |
| Package | DO-41 (Case 59) - industry-standard axial plastic package with corrosion-resistant leads and void-free molding |
Pinout & Package
DO-41 axial package with two terminals: cathode marked by color band, anode unmarked. Leads are tin-plated copper, solderable at 260°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to higher-potential node in regulation circuit; carries full Zener current during conduction |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to system ground or low-side return; establishes voltage reference point for VZ |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free DO-41 package | Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow and wave soldering processes |
| 6.67 mW/°C ambient derating | Enables predictable power handling up to 1 W at 50°C ambient without forced cooling |
| 250 Ω max Zener impedance at knee (ZZK) | Ensures usable regulation even at low currents (IZK = 2 mA), critical for standby/battery modes |
| Leakage current ≤5 μA @ VR = 5 V | Minimizes quiescent power loss in high-impedance bias networks and sensor references |
| Void-free thermosetting plastic case | Prevents moisture ingress and delamination under thermal cycling, supporting >10-year field reliability |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in 5 V Supply Rails |
|---|---|
Use Scenario: Providing stable 5.6 V reference to instrumentation amplifier bias networks and ADC voltage references in portable medical sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed reference potential independent of supply variation. Use Value: Delivers <±0.3% output stability over −40°C to +85°C due to near-zero TC at 5.6 V, eliminating need for trimming resistors. |
Use Scenario: Protecting downstream 5 V logic ICs (e.g., microcontrollers, level shifters) from transient spikes on USB-powered embedded systems. IC Role / Device Role / Timing Role: Shunt clamp activated during overvoltage events exceeding 5.88 V, diverting surge current to ground. Use Value: Withstands 98 W surges (1 ms) without degradation, enabling robust protection without external TVS diodes in cost-sensitive designs. |
| Low-Power Bias Generator for BJT Amplifiers | Field-Replaceable Voltage Regulator in Industrial Controllers |
Use Scenario: Generating base bias voltage for Class-A audio preamplifier stages in battery-operated audio equipment. IC Role / Device Role / Timing Role: Zener diode supplying regulated current to transistor base via series resistor, setting Q-point. Use Value: 66.9 Ω ZZT ensures minimal VBE drift under varying collector current, maintaining gain stability across battery discharge. |
Use Scenario: Replacing failed voltage regulators in legacy PLC I/O modules where space constraints prohibit SMD redesign. IC Role / Device Role / Timing Role: Axial-leaded discrete component directly soldered into through-hole footprint of obsolete 3-terminal regulator. Use Value: DO-41 package matches legacy board cutouts; 3 W rating exceeds original 1 W requirement, extending service life in high-temperature enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | Same 5.6 V nominal, but ±5% tolerance, 1 W rating, DO-41 package, ZZT = 10 Ω @ 45 mA | Lower power handling limits use in >150 mA continuous regulation; better low-current regulation due to lower ZZT | Select when power demand is ≤1 W and tighter low-current regulation is prioritized over surge robustness |
| BZX55-C5V6 | 5.6 V ±5%, 500 mW rating, DO-35 package, ZZT = 40 Ω @ 5 mA | Smaller DO-35 footprint reduces board area but lacks 98 W surge capability and high-temp rating | Select for space-constrained consumer electronics where 3 W capability and extended temperature range are not required |
Compared with 1N5919B, the 1N4734A offers superior low-current regulation but cannot sustain 267 mA continuously; the BZX55-C5V6 saves board space yet sacrifices surge immunity and high-temperature operation-making 1N5919B optimal for industrial-grade reliability-critical designs.
Availability
1N5919B is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5919B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1N5919B belongs to the 1N5913B Series of 3 W Zener regulators, engineered for high-reliability voltage reference and clamping in harsh-environment applications where thermal stability and surge resilience are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5919B?
The 1N5919B has a ±5% Zener voltage tolerance, confirmed by its "B" suffix per onsemi's ordering nomenclature. Its specified breakdown range is 5.32 V (min) to 5.88 V (max) at 2 mA test current, with 5.6 V as the nominal value. This tolerance is guaranteed across the full operating temperature range and is validated during 100% production testing.
Can the 1N5919B be used in surface-mount designs?
No, the 1N5919B is exclusively offered in the axial-lead DO-41 (Case 59) package and is not available in SMD variants. It requires through-hole mounting with 260°C soldering at the lead for 10 seconds. For surface-mount equivalents, engineers should consider the MMBZ5232B (SOT-23, 5.6 V, 225 mW) or BZX84-C5V6 (SOT-23, 5.6 V, 300 mW), though neither matches the 1N5919B's 3 W rating or 98 W surge capability.
What is the maximum allowable lead temperature during soldering for the 1N5919B?
The maximum lead temperature for soldering the 1N5919B is 260°C, applied at a distance of 1/16″ from the case for no longer than 10 seconds. This specification ensures junction integrity and avoids thermal damage to the silicon-oxide passivated junction. Exceeding this limit risks latent parametric shifts or immediate open-circuit failure.
How does the 1N5919B perform at elevated ambient temperatures?
The 1N5919B supports operation up to +200°C junction temperature and is rated for 1 W steady-state dissipation at 50°C ambient, derating linearly at 6.67 mW/°C above that point. At 85°C ambient, it can safely dissipate ~780 mW; at 125°C, ~550 mW. Its wide −65°C to +200°C storage range makes it suitable for under-hood automotive and downhole industrial applications.
Is the 1N5919B suitable for low-current reference applications below 1 mA?
Yes-the 1N5919B maintains usable regulation down to IZK = 2 mA, with ZZK ≤ 250 Ω and leakage current ≤5 μA at 5 V reverse bias. While not optimized for sub-mA operation like bandgap references, it provides adequate stability for bias networks and low-power comparators where 5.6 V reference accuracy outweighs ultra-low quiescent current requirements.
1N5919B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5919B FAQ
1.How can I place an order for 1N5919B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5919B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5919B reliable?
The price and inventory of 1N5919B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5919B is usually 5 days.
3.What payment methods are accepted for 1N5919B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5919B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5919B?
1N5919B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5919B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5919B?
For technical support, including 1N5919B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5919B requirements.
6.How does Aetrix verify that 1N5919B is sourced from the original manufacturer or authorized distributors?
All 1N5919B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5919B meets industry standards.
7.What is the process for return or replacement of 1N5919B?
All 1N5919B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5919B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5919B part is unused and in its original packaging.
Return procedure for 1N5919B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5919B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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