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Diodes Incorporated 1N5234B-T
- Part No.:
- 1N5234B-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5234B-T.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,265
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Product details
Overview
1N5234B-T from Diodes Incorporated is a 6.2 V, ±5% tolerance, 500 mW surface-mount Zener diode in a hermetic DO-35 glass package, rated for operation from −65 °C to +175 °C, with 7.0 Ω zener impedance at 20 mA and 4.0 µA maximum reverse leakage at 4.96 V, used for precision voltage reference and overvoltage protection in power supply regulation circuits.
For engineers reviewing the 1N5234B-T datasheet, 1N5234B-T pinout, 1N5234B-T application, or 1N5234B-T equivalent, key selection criteria include its tight 6.2 V nominal zener voltage, low 7.0 Ω dynamic impedance, ±5% tolerance, −65 °C to +175 °C operating range, and DO-35 glass package compatibility with automated SMT assembly.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across load variations and temperature shifts. Its 6.2 V nominal zener voltage exhibits a +0.045 %/°C temperature coefficient and is specified at 20 mA test current with 7.0 Ω dynamic impedance (ZZT) and 1000 Ω knee impedance (ZZK) at 0.25 mA.
The device delivers 500 mW power dissipation under defined thermal conditions (lead temperature ≤75 °C, 9.5 mm lead length), with 300 °C/W junction-to-ambient thermal resistance and RoHS-compliant Sn96.5Ag3.5 terminal finish solderable per MIL-STD-202, Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V range at 20 mA - defines precise clamping/reference level in feedback or protection paths |
| Power Dissipation (PD) | 500 mW - supports continuous regulation in low-power analog and digital supply rails without heatsinking |
| Zener Impedance (ZZT) | 7.0 Ω at 20 mA - ensures minimal output voltage variation under load current changes |
| Reverse Leakage (IR) | ≤4.0 µA at 4.96 V - guarantees low standby current in battery-powered or high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.045 %/°C - enables predictable voltage drift compensation in temperature-stable references |
| Package | DO-35 glass - hermetic, moisture-insensitive housing suitable for harsh industrial environments |
| Operating Temp. | −65 °C to +175 °C - qualified for under-hood automotive, downhole, and high-reliability embedded systems |
Pinout & Package
DO-35 glass axial package with cathode band marking; two-terminal device with no internal pin numbering - anode and cathode leads extend axially from opposite ends of the cylindrical glass body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail when used in shunt regulation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to input rail through series resistor; provides stable 6.2 V reference to load |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass package | DO-35 construction prevents moisture ingress and ensures long-term parameter stability in humid or corrosive environments |
| ±5% zener voltage tolerance | Tight initial accuracy reduces need for post-production trimming in voltage reference designs |
| Low 7.0 Ω dynamic impedance | Minimizes output voltage deviation under ±10 mA load transients in feedback loops |
| RoHS-compliant Sn96.5Ag3.5 terminals | Enables lead-free reflow soldering without compromising wetting or intermetallic formation reliability |
| High-temperature operation | Rated up to +175 °C junction temperature - supports use in engine control units and industrial motor drives |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Providing stable 6.2 V reference for op-amp comparators and ADC voltage dividers in industrial sensor signal conditioning. IC Role / Device Role / Timing Role: Shunt voltage reference connected between supply rail and ground via current-limiting resistor. Use Value: Delivers <±10 mV drift over −40 °C to +85 °C due to +0.045 %/°C tempco and low ZZT. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced voltage spikes on 5 V logic lines. IC Role / Device Role / Timing Role: Reverse-biased clamp placed between I/O line and ground to divert transient energy. Use Value: Clamps excursions above 6.51 V (max VZ) with sub-µs response and <4 µA leakage at 80% of VZ. |
| Temperature-Stable Bias Network | Low-Power Battery Monitor |
Use Scenario: Generating temperature-compensated bias current for precision current sources in analog front-ends. IC Role / Device Role / Timing Role: Zener-driven base-emitter voltage reference for bipolar transistor current mirrors. Use Value: Enables <0.5% bias current variation over full industrial temperature range using matched tempco design. |
Use Scenario: Monitoring lithium coin-cell voltage (2.0–3.3 V) by scaling with resistive divider into MCU ADC. IC Role / Device Role / Timing Role: Low-leakage 6.2 V reference enabling ratiometric measurement against stable internal reference. Use Value: Achieves ±0.2% battery voltage accuracy with <4 µA reverse current minimizing drain on 10 µA standby systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5234B | Same 6.2 V, ±5%, SOD-123 plastic package; 500 mW rating; 10 Ω ZZT; higher moisture sensitivity (MSL 1 vs. hermetic) | Suitable for cost-sensitive consumer PCBs where humidity exposure is controlled; not recommended for sealed high-reliability enclosures | Select for volume SMT production where DO-35 axial placement is incompatible with board layout |
| 1N4735A | 6.2 V, ±5%, DO-41 package; 1 W power rating; 5 Ω ZZT; −65 °C to +175 °C; leaded, non-RoHS default | Preferred for higher-power dissipation (>500 mW) or legacy through-hole designs requiring mechanical robustness | Choose when thermal margin exceeds 500 mW or when existing DO-41 footprint must be retained |
Compared with MMSZ5234B and 1N4735A, the 1N5234B-T offers superior long-term parameter stability via hermetic DO-35 packaging and tighter thermal resistance control, making it optimal for aerospace-grade voltage references where parameter drift over time and environment must be minimized.
Availability
1N5234B-T is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and medical diagnostic equipment requiring stable component supply despite its obsolete status-inventory is maintained for legacy system support and repair.
Supply support for 1N5234B-T 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 1N52xxB series belongs to Diodes' legacy Zener diode product line, engineered specifically for precision voltage regulation and protection in space-constrained, high-reliability applications where hermetic sealing and wide temperature operation are critical.
FAQ
Is the 1N5234B-T still in active production?
No-the 1N5234B-T is officially obsolete and discontinued by Diodes Incorporated as of September 2019. Aetrix Electronics maintains limited legacy stock for repair and maintenance of existing systems, but no new production runs are planned. Customers should evaluate MMSZ5234B or other modern alternatives for new designs.
What is the correct polarity marking for the 1N5234B-T?
The 1N5234B-T uses a cathode band (a single painted stripe) near one end of the DO-35 glass body to identify the cathode terminal. When mounted, the banded end connects to the higher-potential node (e.g., input rail); the unmarked end is the anode and connects to ground or the lower-potential reference point.
Can the 1N5234B-T replace the 1N4735A in a circuit?
Yes, electrically-both are 6.2 V, ±5% Zener diodes-but mechanical and thermal differences matter: the 1N5234B-T has lower power rating (500 mW vs. 1 W), smaller DO-35 package, and hermetic glass construction versus DO-41 plastic. Derating and board layout must be verified before substitution.
What does "-T" suffix mean in 1N5234B-T?
The "-T" suffix indicates tape-and-reel packaging: 10,000 units per reel in standard 8 mm carrier tape, optimized for automated SMT placement. It does not denote a functional or electrical variant-the electrical specifications match the base 1N5234B part exactly.
1N5234B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N5234B-T FAQ
1.How can I place an order for 1N5234B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5234B-T 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 1N5234B-T reliable?
The price and inventory of 1N5234B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5234B-T is usually 5 days.
3.What payment methods are accepted for 1N5234B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5234B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5234B-T?
1N5234B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5234B-T 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 1N5234B-T?
For technical support, including 1N5234B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5234B-T requirements.
6.How does Aetrix verify that 1N5234B-T is sourced from the original manufacturer or authorized distributors?
All 1N5234B-T 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 1N5234B-T meets industry standards.
7.What is the process for return or replacement of 1N5234B-T?
All 1N5234B-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N5234B-T, 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 1N5234B-T part is unused and in its original packaging.
Return procedure for 1N5234B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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