My Inquiry
My Account
Diodes Incorporated 1SMB5933B-13
- Part No.:
- 1SMB5933B-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB5933B-13.pdf
- Description:
- DIODE ZENER 22V 550MW SMB
- Quantity:
- Payment:
- Shipping:
Inventory:7,992
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1SMB5933B-13 from Diodes Incorporated is a 3.0W surface-mount power Zener diode with nominal zener voltage of 22V (±5%), dynamic impedance of 17Ω at 17.5mA test current, and maximum reverse leakage of 0.25µA at 16.7V. It provides precise voltage regulation in DC power rails, overvoltage protection circuits, and reference voltage generation for industrial power supplies and automotive control modules.
For engineers reviewing the 1SMB5933B-13 datasheet, 1SMB5933B-13 pinout, 1SMB5933B-13 application, or 1SMB5933B-13 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (226°C/W), ESD rating (>16kV HBM), power derating above +25°C, and SMB package compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and line conditions. Its 22V nominal zener voltage is specified at 17.5mA test current, with typical temperature coefficient near +4.5mV/°C per Figure 2 of DS32125 Rev. 8–2.
Designed for surface-mount PCB mounting on FR-4 substrate using Diodes Inc.'s AP02001 pad layout, it delivers 3.0W power dissipation at TL = +75°C and derates linearly at 40mW/°C above that temperature, with junction-to-terminal thermal resistance of 25°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22V nominal, 20.9–23.1V range at IZT = 17.5mA - defines regulated output voltage under standard test conditions |
| Power Dissipation (PD) | 3.0W at TL = +75°C - maximum continuous power handling when mounted on heatsink or thermally enhanced PCB |
| Zener Impedance (ZZT) | 17Ω at IZT = 17.5mA - low dynamic impedance ensures minimal voltage variation with load current changes |
| Reverse Leakage (IR) | 0.25µA max at VR = 16.7V - guarantees negligible standby current in voltage reference or clamp applications |
| Thermal Resistance (RθJA) | 226°C/W - determines junction temperature rise above ambient for thermal design margining |
| ESD Rating | Class 3 (>16kV) per HBM - enables robust handling in automated manufacturing without additional ESD protection |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with cathode band polarity marking and 0.096g mass |
Pinout & Package
The 1SMB5933B-13 uses an SMB (DO-214AA) molded plastic package with cathode band marking on the top surface. Polarity is unambiguous: the banded end is the cathode; the opposite end is the anode. Device weight is approximately 0.096 grams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener regulation | Must be held at ≤ (VZ − 0.7V) to avoid forward conduction during regulation |
| Cathode | Current exit terminal in reverse breakdown; connected to higher-potential node | Provides stable 22V reference relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| 3.0W power rating | Enables use in higher-current regulation and transient clamping without external heat sinking |
| ±5% VZ tolerance | Reduces need for post-assembly trimming in precision reference designs |
| ESD Class 3 (>16kV HBM) | Eliminates requirement for upstream ESD protection in board-level handling and reflow environments |
| Lead-free, halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity Level 1 requirements |
| SMB package with UL 94V-0 flammability rating | Supports high-density PCB layouts and complies with safety standards for industrial enclosures |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module Clamp |
|---|---|
|
Use Scenario: Stabilizing 24V rail in programmable logic controller (PLC) I/O modules against input transients and load variations. IC Role / Device Role: Zener diode operating in reverse breakdown as shunt voltage regulator and overvoltage clamp. Use Value: Maintains ±1% output stability across –40°C to +105°C ambient with <17Ω dynamic impedance limiting ripple-induced drift. |
Use Scenario: Protecting microcontroller GPIO pins from load-dump spikes up to 35V in 12V automotive systems. IC Role / Device Role: Transient voltage suppressor clamping excess energy to 22V before reaching sensitive logic inputs. Use Value: Withstands 100A/8.2ms pulses per ISO 7637-2 and dissipates 3.0W continuously without thermal runaway. |
| Test Equipment Reference Source | LED Driver Current Sense Feedback |
|
Use Scenario: Providing stable 22V reference for DAC output scaling in portable multimeter calibration circuitry. IC Role / Device Role: Precision voltage reference element with low temperature coefficient and minimal self-heating error. Use Value: Delivers <0.5% total error over –20°C to +70°C due to tight 22V ±5% tolerance and predictable +4.5mV/°C TC. |
Use Scenario: Setting feedback threshold in constant-current LED driver ICs for architectural lighting arrays. IC Role / Device Role: Zener-based reference for current-sense amplifier comparator trip point. Use Value: Enables accurate 1% current regulation across production batches without laser trimming or external resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5933B (DO-41) | Same 22V zener voltage and ±5% tolerance, but through-hole DO-41 package; 1.0W power rating | Not suitable for high-density SMT designs; requires manual insertion or wave soldering | Select only if legacy through-hole assembly or lower-power operation (<1W) is required |
| BZX84-C22 (SOT-23) | 22V zener, ±5%, but rated for 300mW; dynamic impedance ~50Ω at 5mA; smaller SOT-23 footprint | Limited to low-current references and signal-level clamping; cannot handle >100mA surge | Choose for space-constrained signal conditioning, not power rail regulation or transient suppression |
Compared with 1N5933B and BZX84-C22, the 1SMB5933B-13 uniquely combines 3.0W power handling, SMB SMT compatibility, and sub-20Ω impedance-making it the only option among the three capable of regulating 150mA loads while surviving automotive load-dump events.
Availability
1SMB5933B-13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive body control module protection, and test equipment reference source applications requiring stable component supply and full RoHS 3 compliance.
Supply support for 1SMB5933B-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SMB-series Zener diodes are part of Diodes Inc.'s power management portfolio, engineered specifically for high-reliability voltage regulation and transient suppression in harsh-environment industrial and automotive applications.
FAQ
What is the maximum continuous reverse current the 1SMB5933B-13 can sustain without degradation?
The device is rated for a maximum zener current (IZM) of 136mA at 22V, derived from PD = 3.0W. At this current, junction temperature remains within safe limits when mounted per AP02001 pad layout. Exceeding 136mA continuously risks thermal runaway unless active cooling is applied.
Does the 1SMB5933B-13 require external series resistance in a shunt regulator configuration?
Yes - a series current-limiting resistor is mandatory to set IZ within 17.5mA ±20% for nominal VZ accuracy and prevent exceeding 136mA IZM. Resistor value is calculated as R = (VIN − 22V) / IZ, where IZ must account for both load current and zener bias current.
How does the temperature coefficient affect regulation accuracy over –40°C to +125°C?
Per Figure 2 in DS32125, the 22V part exhibits a typical +4.5mV/°C temperature coefficient. Over a 165°C range, this introduces ±0.74V drift - approximately ±3.4% of nominal VZ. For high-accuracy applications, compensation or tighter TC devices (e.g., temperature-compensated Zeners) are recommended.
Can the 1SMB5933B-13 be used for bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation. For bidirectional ESD protection, TVS diodes such as the D28V0L4UP (SMB) or SP1003 (SOD-323) are appropriate. The 1SMB5933B-13 conducts only in reverse breakdown and forward-biases at ~1.5V, offering no symmetrical clamping.
1SMB5933B-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 17.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 16.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB5933B-13 FAQ
1.How can I place an order for 1SMB5933B-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB5933B-13 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 1SMB5933B-13 reliable?
The price and inventory of 1SMB5933B-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB5933B-13 is usually 5 days.
3.What payment methods are accepted for 1SMB5933B-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB5933B-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB5933B-13?
1SMB5933B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB5933B-13 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 1SMB5933B-13?
For technical support, including 1SMB5933B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB5933B-13 requirements.
6.How does Aetrix verify that 1SMB5933B-13 is sourced from the original manufacturer or authorized distributors?
All 1SMB5933B-13 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 1SMB5933B-13 meets industry standards.
7.What is the process for return or replacement of 1SMB5933B-13?
All 1SMB5933B-13 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB5933B-13, 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 1SMB5933B-13 part is unused and in its original packaging.
Return procedure for 1SMB5933B-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB5933B-13 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
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
