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Microchip Technology 1N964B
- Part No.:
- 1N964B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N964B.pdf
- Description:
- DIODE ZENER 13V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:6,490
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Product details
Overview
1N964B from Microsemi is a silicon 500 mW axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 13 V nominal Zener voltage at 13.0 mA test current, with ±5% tolerance, 700 Ω maximum Zener impedance at IZT, and +0.079 %/°C temperature coefficient. It regulates voltage in low-power reference and protection circuits across industrial control and instrumentation systems.
For engineers reviewing the 1N964B datasheet, 1N964B pinout, 1N964B application, or 1N964B equivalent, key selection criteria include its 13 V regulation accuracy, 0.5 W power rating at 50 °C lead temperature, DO-35 mechanical compatibility, and suitability for voltage clamping, overvoltage protection, and precision biasing where stable low-current Zener operation is required.
Technical Context
The 1N964B operates as a reverse-biased voltage reference diode with sharp breakdown knee, specified at 13.0 mA Zener test current and validated per JEDEC standards. Its thermal resistance is 250 °C/W junction-to-lead (3/8″ lead length), enabling stable regulation up to 175 °C junction temperature.
It exhibits minimal capacitance (typical <2 pF at 0 V, per Figure 3), low reverse leakage (<5 μA at 9.9 V), and inherent radiation hardness per MicroNote 050. The cathode band denotes polarity, requiring banded end to be positive during Zener conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 13 V ±5% - defines regulated output level under 13.0 mA test current; used for reference generation and clamping thresholds |
| Zener Test Current | 13.0 mA - operating point at which VZ and ZZT are guaranteed; sets minimum bias for stable regulation |
| Zener Impedance | 700 Ω max @ IZT - limits voltage deviation under load variation; impacts regulation stability in low-current applications |
| Max DC Zener Current | 28 mA - maximum continuous reverse current before exceeding 400 mW dissipation at 75 °C lead temp |
| Temp Coefficient | +0.079 %/°C - quantifies VZ drift with temperature; enables compensation in precision references |
| Reverse Leakage | 5 μA max @ 9.9 V - ensures low standby power loss in high-impedance bias networks |
| Power Rating | 500 mW @ TL ≤ 50 °C - derates linearly above 50 °C; requires thermal management on PCB |
Pinout & Package
Package: DO-35 (DO-204AH), hermetically sealed glass axial-leaded case with tin-lead or RoHS-compliant matte-tin plating. Cathode indicated by color band; banded end must be held positive relative to anode for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; serves as return path for Zener current during regulation |
| Cathode | Regulated output node | Banded terminal; supplies stable 13 V when reverse-biased above breakdown; polarity critical for function |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Complies with industry-standard 1N957B–1N992B specifications; ensures interchangeability and qualification traceability |
| ±5% voltage tolerance (B suffix) | Guarantees 12.35–13.65 V regulation window at 25 °C; balances cost and accuracy for general-purpose use |
| Low reverse leakage | ≤5 μA at 9.9 V enables use in high-impedance voltage dividers without significant error contribution |
| Radiation-hardened construction | Inherently resistant to total ionizing dose per MicroNote 050; suitable for aerospace and defense environments |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020; eliminates need for external ESD protection in handling and assembly |
Applications
| Voltage Reference for Analog Sensors | Overvoltage Clamp in Power Supply Rails |
|---|---|
Use Scenario: Providing stable excitation voltage to bridge-based pressure or temperature sensors in industrial transmitters. IC Role / Device Role / Timing Role: Zener diode acting as two-terminal shunt reference, replacing higher-cost IC references where 1% accuracy is not required. Use Value: Delivers 13 V ±5% with <5 μA leakage, minimizing sensor offset error and enabling direct connection to high-impedance amplifier inputs. |
Use Scenario: Protecting 12 V logic rails from transient surges in automotive body control modules. IC Role / Device Role / Timing Role: Shunt clamp limiting rail voltage to ~13 V during load dump or inductive kick events. Use Value: Absorbs up to 28 mA continuously and handles 150 mA surge pulses (1/120 s), preventing downstream IC damage without active circuitry. |
| Biased Bias Network for Linear Regulators | Threshold Detector in Battery Monitoring Circuits |
Use Scenario: Setting base-emitter bias for pass transistors in discrete 5 V linear regulators. IC Role / Device Role / Timing Role: Provides fixed 13 V reference to generate stable 5 V output via resistor divider and transistor feedback. Use Value: Low 700 Ω Zener impedance ensures minimal voltage shift under varying base current demand, improving regulator line regulation. |
Use Scenario: Triggering low-battery alerts in portable medical devices powered by 12 V sealed lead-acid batteries. IC Role / Device Role / Timing Role: Zener-based comparator input threshold set to 13 V to indicate battery depletion below safe operating range. Use Value: Stable +0.079 %/°C tempco allows predictable trip point across –40 to +85 °C ambient, reducing calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A (ON Semiconductor) | 12 V nominal, ±5%, 1000 mW rating, DO-41 package, 22 Ω ZZT | Higher power and lower impedance but larger footprint; unsuitable for space-constrained DO-35 layouts | Select when higher surge capability and tighter regulation are needed, and board area permits DO-41 mounting |
| BZX55C13 (Vishay) | 13 V nominal, ±5%, 500 mW, DO-35, 30 Ω ZZT, 100 nA leakage @ 10.4 V | Lower leakage and impedance, but not radiation-hardened; lacks MIL-STD-750 ESD qualification | Prefer for commercial-grade consumer electronics where ultra-low leakage matters more than radiation tolerance |
Compared with 1N964B, the 1N4742A offers higher power margin and lower dynamic impedance but requires layout revision due to DO-41 size, while the BZX55C13 delivers superior electrical specs in same DO-35 form factor yet omits radiation hardening and military-grade ESD robustness critical for aerospace or defense deployments.
Availability
1N964B is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and analog biasing applications requiring stable component supply, long-term obsolescence management, and consistent DO-35 mechanical fit.
Supply support for 1N964B 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for aerospace, defense, and industrial markets.
The 1N964B belongs to Microsemi's legacy JEDEC-registered 1N957B–1N992B Zener series, designed for ruggedized voltage regulation in mission-critical systems where extended temperature operation and ESD immunity are mandatory.
FAQ
What is the Zener voltage tolerance for 1N964B?
The 1N964B has a nominal Zener voltage of 13 V with a ±5% tolerance, as indicated by the "B" suffix per JEDEC standard. This means the actual measured VZ falls between 12.35 V and 13.65 V at 25 °C under 13.0 mA test current. Tighter tolerances (e.g., ±2% or ±1%) require suffixes C or D, respectively, and are not applicable to the 1N964B part number.
Can 1N964B be used in surface-mount designs?
No - the 1N964B is exclusively packaged in the through-hole DO-35 (DO-204AH) axial-glass format. For surface-mount equivalents, Microsemi offers the MLL964B in DO-213AA (MELF) package. Direct substitution requires rework of PCB layout, soldering process, and thermal validation due to differing thermal resistance and mounting mechanics.
What is the maximum steady-state power dissipation for 1N964B?
The 1N964B is rated for 500 mW steady-state power dissipation only when lead temperature (TL) is maintained at or below 50 °C, measured 3/8″ from the body. At 25 °C ambient on FR4 with 4 mm² copper pads, derated power drops to 480 mW. Exceeding these conditions risks thermal runaway and parametric shift.
Does 1N964B meet RoHS requirements?
Standard 1N964B uses tin-lead (Sn/Pb) plating and is not RoHS compliant. To obtain RoHS-compliant versions, the "e3" suffix must be added to the part number (e.g., 1N964Be3), indicating annealed matte-tin termination per J-STD-609. Always verify suffix configuration before procurement for compliance-critical programs.
How does temperature affect the Zener voltage of 1N964B?
The 1N964B has a positive temperature coefficient of +0.079 %/°C, meaning its Zener voltage increases by approximately 10.3 mV per °C rise in junction temperature. At 13 V nominal, this equates to +134 mV per 10 °C. Designers must account for this drift in precision references or implement compensation networks where stability across –65 to +175 °C is required.
1N964B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 13 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 9.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N964B FAQ
1.How can I place an order for 1N964B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N964B 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 1N964B reliable?
The price and inventory of 1N964B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N964B is usually 5 days.
3.What payment methods are accepted for 1N964B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N964B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N964B?
1N964B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N964B 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 1N964B?
For technical support, including 1N964B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N964B requirements.
6.How does Aetrix verify that 1N964B is sourced from the original manufacturer or authorized distributors?
All 1N964B 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 1N964B meets industry standards.
7.What is the process for return or replacement of 1N964B?
All 1N964B units undergo pre-shipment inspection (PSI). If there is an issue with 1N964B, 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 1N964B part is unused and in its original packaging.
Return procedure for 1N964B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N964B 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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