My Inquiry
My Account
Diodes Incorporated 1SMB5934B-13
- Part No.:
- 1SMB5934B-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB5934B-13.pdf
- Description:
- DIODE ZENER 24V 550MW SMB
- Quantity:
- Payment:
- Shipping:
Inventory:44,787
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1SMB5934B-13 from Diodes Incorporated is a 3.0W surface-mount power Zener diode with nominal zener voltage of 24V (±5%), dynamic impedance of 15.6Ω at 19mA test current, and maximum reverse leakage of 0.25µA at 18.2V. It provides precision voltage regulation in DC power rails and overvoltage protection circuits for industrial power supplies.
For engineers reviewing the 1SMB5934B-13 datasheet, 1SMB5934B-13 pinout, 1SMB5934B-13 application, or 1SMB5934B-13 equivalent, this device is selected for stable 24V reference generation, transient suppression in 24V automotive subsystems, and low-noise feedback path regulation where thermal stability and ESD robustness (>16kV HBM) are critical.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable voltage across its terminals under varying load and temperature conditions. Its 24V nominal zener voltage is specified at 19mA test current, with a temperature coefficient of +11.2mV/°C (typical), enabling predictable drift compensation in analog feedback loops.
The SMB package delivers 3.0W power dissipation at TL = +75°C with 25°C/W junction-to-terminal thermal resistance, supporting high-reliability operation in compact PCB layouts. Its 226°C/W junction-to-ambient rating assumes FR-4 mounting per AP02001 pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24V nominal (22.8–25.2V range at IZT = 19mA); defines regulated output voltage in shunt regulator designs |
| Power Dissipation (PD) | 3.0W at TL = +75°C; enables sustained energy clamping without derating in thermally managed layouts |
| Zener Impedance (ZZT) | 15.6Ω at IZT = 19mA; determines AC ripple rejection and regulation accuracy under dynamic load changes |
| Reverse Leakage (IR) | 0.25µA max at VR = 18.2V; ensures minimal quiescent current draw in battery-powered voltage reference circuits |
| ESD Rating | Class 3 (>16kV HBM); protects against electrostatic discharge during automated SMT assembly and field handling |
| Thermal Resistance (RθJA) | 226°C/W on FR-4 PCB; informs minimum copper area and via count needed to maintain TJ < 150°C |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case with UL 94V-0 flammability rating, cathode band polarity marking, and matte tin-plated copper alloy leadframe. Dimensions: 3.30–3.94mm (L) × 4.06–4.57mm (W) × 1.96–2.21mm (H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener regulation | Must be routed to ground or common return in shunt regulator configuration to sink excess current |
| Cathode | Current exit terminal in reverse breakdown; connected to regulated voltage rail | Marked by band; ties directly to feedback node or protected line requiring precise 24V clamping |
Key Features
| Feature | Design Value |
|---|---|
| 3.0W Power Handling | Supports high-energy transient suppression in 24V industrial control inputs without external heat sinking |
| ±5% Zener Tolerance | Ensures consistent 24V regulation across production batches, reducing calibration overhead in feedback networks |
| Lead-Free & Halogen-Free | Meets RoHS 3 (2015/863/EU) and green manufacturing requirements for global electronics compliance |
| ESD Robustness >16kV HBM | Eliminates need for upstream ESD protection in automated assembly lines and end-equipment handling |
Applications
| Industrial Power Supply Regulation | Automotive 24V Subsystem Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 24V setpoint to error amplifier input. Use Value: Maintains ±1% output regulation over -40°C to +85°C ambient due to low TC and tight VZ tolerance. |
Use Scenario: Clamping transients on 24V CAN bus power rails in commercial vehicle ECUs. IC Role / Device Role / Timing Role: Overvoltage protector absorbing load-dump spikes up to 60V peak. Use Value: Withstands 3.0W pulses without degradation, meeting ISO 7637-2 Pulse 5a requirements. |
| Test Equipment Reference Source | Medical Device Power Monitoring |
Use Scenario: Generating stable 24V reference for multimeter analog front-end ADC biasing. IC Role / Device Role / Timing Role: Low-drift voltage reference minimizing measurement offset error. Use Value: 15.6Ω ZZT limits noise coupling into sensitive analog signal paths. |
Use Scenario: Monitoring auxiliary 24V supply integrity in portable ultrasound battery packs. IC Role / Device Role / Timing Role: Undervoltage detection element triggering safe shutdown at 18.2V threshold. Use Value: 0.25µA leakage at 18.2V ensures negligible battery drain during standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5934B | Same 24V/3W specs but DO-41 through-hole package; RθJA = 500°C/W vs. 226°C/W | Requires manual insertion and wave soldering; unsuitable for high-density SMT boards | Select when legacy through-hole assembly or higher single-pulse surge capability (100A vs. 62A) is required |
| SMBJ24A | TVS diode (not Zener); 24V standoff, 38.9V clamping; 600W peak pulse power | Designed for fast transient suppression (1ns response), not precision DC regulation | Select only for surge-only protection; not interchangeable for voltage reference or shunt regulation |
Compared with 1N5934B and SMBJ24A, the 1SMB5934B-13 uniquely balances precision DC regulation (±5% VZ, 15.6Ω ZZT) with SMT manufacturability and thermal performance (226°C/W), making it optimal for space-constrained 24V power monitoring and feedback circuits.
Availability
1SMB5934B-13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive 24V subsystem protection, and test equipment reference source applications requiring stable component supply and full RoHS 3 compliance.
Supply support for 1SMB5934B-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 and manufacturing operations across Asia and the Americas.
The 1SMB59xxB series belongs to Diodes' high-power Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in industrial, automotive, and medical power systems where reliability and thermal performance are critical.
FAQ
What is the maximum continuous Zener current for 1SMB5934B-13 at 25°C ambient?
The maximum continuous Zener current is calculated as PD/VZ = 550mW / 24V ≈ 22.9mA at TA = +25°C. This value decreases linearly above +25°C at 4.4mW/°C, reaching zero at approximately +138°C ambient.
Does 1SMB5934B-13 support reflow soldering per J-STD-020?
Yes - the SMB package is rated Moisture Sensitivity Level 1 (MSL-1), meaning it can withstand unlimited floor life and standard Pb-free reflow profiles (peak 260°C) without baking. The matte tin finish ensures reliable solderability per MIL-STD-202, Method 208.
How does the temperature coefficient affect regulation accuracy over -40°C to +125°C?
With a typical TC of +11.2mV/°C, the 24V Zener shifts by approximately ±1.85V across that range. For applications requiring tighter stability, parallel configurations or temperature-compensated references should be considered.
Can 1SMB5934B-13 replace 1N5245B in a 24V shunt regulator?
No - 1N5245B is a 1W, 24V Zener in DO-35 package with higher ZZT (30Ω) and lower surge capability. The 1SMB5934B-13 offers 3× power handling, lower impedance, and SMT compatibility, but requires PCB layout revision and thermal validation.
1SMB5934B-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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 18.2 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
1SMB5934B-13 FAQ
1.How can I place an order for 1SMB5934B-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB5934B-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 1SMB5934B-13 reliable?
The price and inventory of 1SMB5934B-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB5934B-13 is usually 5 days.
3.What payment methods are accepted for 1SMB5934B-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB5934B-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB5934B-13?
1SMB5934B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB5934B-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 1SMB5934B-13?
For technical support, including 1SMB5934B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB5934B-13 requirements.
6.How does Aetrix verify that 1SMB5934B-13 is sourced from the original manufacturer or authorized distributors?
All 1SMB5934B-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 1SMB5934B-13 meets industry standards.
7.What is the process for return or replacement of 1SMB5934B-13?
All 1SMB5934B-13 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB5934B-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 1SMB5934B-13 part is unused and in its original packaging.
Return procedure for 1SMB5934B-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB5934B-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…
