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Microchip Technology 1N4134B/TR
- Part No.:
- 1N4134B/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4134B/TR.pdf
- Description:
- DIODE ZENER 91V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:7,125
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Product details
Overview
1N4134B/TR from Microsemi is a 91 V, ±5% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial-leaded package, qualified to JANTX level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace power conditioning and precision reference circuits.
For engineers reviewing the 1N4134B/TR datasheet, 1N4134B/TR pinout, 1N4134B/TR application, or 1N4134B/TR equivalent, this part delivers stable 91 V regulation with 40 µV/√Hz noise density at IZT = 250 mA, low dynamic impedance (1200 Ω), and radiation-hardened operation up to +175 °C junction temperature.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, requiring forward bias of the anode relative to the banded cathode for regulation. Its metallurgical bond ensures low thermal resistance (RθJL = 250 °C/W) and stable voltage over wide current (IZK to IZM) and temperature (-65 to +175 °C) ranges.
The device exhibits a positive temperature coefficient of +0.100 %/°C above 50 V, minimal capacitance (<1 pF typical at 91 V), and ESD insensitivity per MIL-STD-750 Method 1020 - enabling use in low-noise analog references and hardened military power rails without external shielding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 91 V ±5% at IZT = 250 mA - defines precise regulation point for reference and clamp applications. |
| Power Dissipation | 500 mW at TL = 25 °C, linearly derated to zero at 175 °C - sets maximum continuous thermal load on PCB traces. |
| Zener Impedance ZZT | 1200 Ω at IZT = 250 mA - determines output voltage stability under varying load current. |
| Noise Density | 1 µV/√Hz typical at 91 V - enables use in ultra-low-noise voltage references without added filtering. |
| Reverse Leakage IR | 10 nA max at VR = 73 V - ensures minimal quiescent current in high-impedance bias networks. |
| Temp. Coefficient αVZ | +0.100 %/°C - allows predictable drift compensation in temperature-critical reference designs. |
| Junction Temp. Range | -65 to +175 °C - supports operation in extended-environment avionics and downhole electronics. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by color band; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal during Zener operation | Connected to lower-potential node; must be biased negative relative to cathode for regulation. |
| Cathode (banded end) | Current exit terminal during Zener operation | Connected to higher-potential node; voltage at this terminal is regulated to 91 V above anode potential. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTX-level screening ensures reliability for flight-critical systems with proven burn-in and environmental testing. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling, extending lifetime in high-vibration platforms. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for space-grade power supervisors. |
| Low capacitance | <1 pF typical at 91 V - preserves signal integrity in RF detector and fast-switching clamp circuits. |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board-level assembly. |
Applications
| Aerospace Power Conditioning | Precision Voltage Reference |
|---|---|
Use Scenario: Regulating auxiliary bus voltage in satellite power distribution units exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp for 100 V nominal bus. Use Value: Maintains 91 V regulation across -55 to +125 °C ambient with <±0.5% drift due to +0.100 %/°C TC and JANTX screening. |
Use Scenario: Providing stable reference input to ADCs and DACs in high-accuracy data acquisition modules. IC Role / Device Role / Timing Role: Low-noise 91 V reference source feeding resistive divider to generate sub-1 V precision references. Use Value: Delivers 1 µV/√Hz noise density and <10 nA leakage - minimizing quantization error and offset drift in 24-bit converters. |
| Avionics Overvoltage Protection | Ruggedized Industrial Sensor Excitation |
Use Scenario: Clamping transient surges on 72 V aircraft battery feeds during load dump events. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing >500 mW surge energy without degradation. Use Value: Withstands 250 mA Zener test current and 1200 Ω dynamic impedance - limiting clamped voltage to ≤93 V during 100 ms transients. |
Use Scenario: Biasing high-impedance piezoresistive pressure sensors in oilfield downhole tools operating at 150 °C. IC Role / Device Role / Timing Role: Stable excitation source maintaining constant sensor bridge voltage despite supply fluctuations. Use Value: Operates continuously at +175 °C junction temperature with no parameter shift - ensuring repeatable sensor calibration over 5-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4134-1 | Same 91 V rating and DO-35 package but non-RoHS, non-TR tape-and-reel; lacks e3 RoHS compliance marking. | Approved for legacy military builds where RoHS exemption applies; not suitable for new commercial aerospace programs. | Select 1N4134B/TR when RoHS compliance and automated SMT placement via tape-and-reel are required. |
| 1N4134UR-1 | Identical electrical specs in DO-213AA surface-mount package; no axial leads; smaller footprint (2.2 × 4.0 mm). | Used where board space is constrained and reflow soldering is preferred; incompatible with through-hole assembly. | Choose 1N4134UR-1 only if redesigning for SMT layout; 1N4134B/TR maintains drop-in compatibility with existing DO-35 footprints. |
Compared with 1N4134-1 and 1N4134UR-1, the 1N4134B/TR uniquely combines JANTX qualification, RoHS compliance (e3), and tape-and-reel packaging - making it the sole option for new production of high-reliability, environmentally compliant axial-leaded Zener regulation.
Availability
1N4134B/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, precision voltage reference, and avionics overvoltage protection requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4134B/TR 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for defense, aerospace, and industrial markets.
The 1N4134B/TR belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for voltage regulation in mission-critical systems where long-term parametric stability and radiation tolerance are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for the 1N4134B/TR?
The 1N4134B/TR has a nominal Zener voltage of 91 V with ±5% tolerance, measured at a Zener test current (IZT) of 250 mA and ambient temperature of 25 °C. This tolerance reflects the standard JEDEC specification for the 1N4134 series and is verified under thermal equilibrium conditions in still air.
Is the 1N4134B/TR RoHS compliant and what does the "e3" suffix indicate?
Yes, the 1N4134B/TR is RoHS compliant - the "e3" in its full designation confirms annealed matte-tin plating per JESD201A Class 1A, applicable to commercial-grade versions. This compliance is explicitly documented in Microsemi's T4-LDS-0245-2 datasheet and qualifies the part for environmentally restricted markets.
What is the maximum junction temperature and thermal resistance of the 1N4134B/TR?
The 1N4134B/TR supports a junction temperature range of -65 to +175 °C. Its thermal resistance junction-to-lead (RθJL) is 250 °C/W when mounted with 3/8 inch (10 mm) lead length from body, and junction-to-ambient (RθJA) is 300 °C/W on FR4 board with specified copper pad geometry.
Does the 1N4134B/TR have radiation hardness and ESD immunity specifications?
Yes, the 1N4134B/TR is inherently radiation hard per Microsemi MicroNote 050 and non-sensitive to ESD per MIL-STD-750 Method 1020. These characteristics stem from its metallurgically bonded glass construction and are confirmed in the official datasheet - no additional qualification testing is needed for radiation-tolerant designs.
How does the "TR" suffix affect packaging and ordering of the 1N4134B/TR?
The "TR" suffix indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. The 1N4134B/TR is supplied in reels with standardized orientation and spacing; this differs from bulk or ammo-pack variants and is required for high-volume SMT production lines handling the 1N4134B/TR.
1N4134B/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 69.16 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
1N4134B/TR FAQ
1.How can I place an order for 1N4134B/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4134B/TR 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 1N4134B/TR reliable?
The price and inventory of 1N4134B/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4134B/TR is usually 5 days.
3.What payment methods are accepted for 1N4134B/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4134B/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4134B/TR?
1N4134B/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4134B/TR 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 1N4134B/TR?
For technical support, including 1N4134B/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4134B/TR requirements.
6.How does Aetrix verify that 1N4134B/TR is sourced from the original manufacturer or authorized distributors?
All 1N4134B/TR 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 1N4134B/TR meets industry standards.
7.What is the process for return or replacement of 1N4134B/TR?
All 1N4134B/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4134B/TR, 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 1N4134B/TR part is unused and in its original packaging.
Return procedure for 1N4134B/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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