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Diodes Incorporated FLLD258TA
- Part No.:
- FLLD258TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
FLLD258TA.pdf
- Description:
- DIODE ARRAY GP 100V 250MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
FLLD258TA from Diodes Incorporated is a silicon planar low-leakage common-cathode dual diode pair in SOT23 package, rated for 100 V repetitive peak reverse voltage, 250 mA average forward current, and 400 ns reverse recovery time. It serves as a compact, thermally efficient signal-level clamping and polarity protection solution in space-constrained DC-DC converter feedback paths and sensor interface circuits.
For engineers reviewing the FLLD258TA datasheet, FLLD258TA pinout, FLLD258TA application, or FLLD258TA equivalent, key selection criteria include its 3–5 nA reverse leakage at 50 V, 4 pF junction capacitance at 1 V, 0.9 V typical forward overshoot under fast switching, and validated operation up to +150°C ambient.
Technical Context
This dual diode integrates two matched, low-leakage epitaxial planar junctions sharing a common cathode terminal (Pin 3), enabling bidirectional transient suppression or dual-path signal conditioning without discrete layout overhead. Its 400 ns trr and 10 ns tfr support moderate-speed switching in 100 kHz–1 MHz power control loops.
The device operates with ≤5 nA IR at 50 V and 25°C, rising to ≤5 µA at 100 V and 150°C - critical for precision bias networks and high-impedance analog front-ends where leakage-induced offset must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports input rail clamping in 48 V industrial systems without breakdown |
| IF(AV) | 250 mA - sufficient for dual-path ESD protection or low-power level-shifting current sinks |
| trr | 400 ns - enables use in <1 MHz flyback snubber and synchronous rectifier auxiliary paths |
| IR @ 50 V | 3–5 nA - preserves accuracy in µA-range reference current mirrors and sensor biasing |
| Cd @ 1 V | 4 pF - minimizes capacitive loading on high-frequency signal lines (e.g., RS-485 receivers) |
| Tj Range | −55 to +150 °C - qualified for under-hood automotive and industrial motor drive PCBs |
Pinout & Package
SOT23-3 plastic surface-mount package with gull-wing leads; 1.3 mm × 2.9 mm footprint, 1.1 mm height, 0.95 mm lead pitch. Cathode common to Pin 3; Anodes on Pins 1 and 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Accepts positive transient or forward-bias current into shared cathode |
| Pin 2 | Anode of Diode 2 | Independent anode path for dual-rail clamping or differential signal routing |
| Pin 3 | Common Cathode | Single low-inductance return node for both diodes; connects to system ground or negative rail |
Key Features
| Feature | Design Value |
|---|---|
| Low reverse leakage | 3–5 nA at 50 V/25°C - reduces error in precision current-sense shunt monitors |
| Matched dual diodes | Identical VF and trr across both elements - ensures balanced clamping in differential inputs |
| Fast recovery | 400 ns trr with 10 ns tfr - limits switching loss in 500 kHz PWM gate-drive bootstrap circuits |
| High-temperature operation | Rated to +150°C junction - supports placement near power MOSFETs without derating |
Applications
| DC-DC Converter Feedback Clamp | Sensor Signal Polarity Protection |
|---|---|
Use Scenario: Clamps op-amp output swing in isolated flyback feedback loop to prevent optocoupler saturation. IC Role / Device Role / Timing Role: Dual-anode clamp diode limiting voltage excursions above/below reference rails. Use Value: 4 pF capacitance avoids phase shift in 100 kHz compensation network; 3 nA leakage prevents reference drift. | Use Scenario: Protects analog front-end of temperature sensor IC against reverse-battery connection during field servicing. IC Role / Device Role / Timing Role: Common-cathode dual diode blocks reverse current while passing valid ±10 mV sensor signals. Use Value: Matched VF ensures symmetric clipping thresholds; 150°C rating survives engine bay thermal cycling. |
| RS-485 Receiver Input Clamp | Microcontroller GPIO ESD Protection |
Use Scenario: Limits common-mode transients on RS-485 bus lines before receiver input stage. IC Role / Device Role / Timing Role: Low-capacitance dual diode shunting overvoltage to ground/VCC rails. Use Value: 4 pF Cd avoids signal integrity degradation at 25 Mbps; 400 ns trr handles 10 kV ESD pulses per IEC 61000-4-2. | Use Scenario: Shields 3.3 V MCU GPIO pins from contact discharge during board handling and connector mating. IC Role / Device Role / Timing Role: Anode-to-ground and anode-to-VCC configuration with shared cathode to absorb ±8 kV HBM events. Use Value: 250 mA IF(AV) sustains repeated low-energy discharges; SOT23 footprint fits tight PCB keepouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-leakage dual diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54C | Higher IR (1 µA @ 25 V), faster trr (4 ns), lower VRRM (30 V) | Not suitable for >30 V clamping; better for high-speed logic-level steering | Select when speed > voltage rating; avoid in 48 V systems |
| NSR0230HT1G | Single diode, 30 V VRRM, 200 mA IF(AV), 0.85 V VF | Requires two devices for dual-path function; lacks matched pairing | Choose only if dual-anode topology is unnecessary and board area allows duplication |
Compared with BAT54C and NSR0230HT1G, FLLD258TA uniquely delivers 100 V clamping headroom, sub-5 nA leakage at 50 V, and monolithic dual-anode matching - essential for precision feedback and high-voltage sensor interfaces where leakage-induced offset and asymmetry are unacceptable.
Availability
FLLD258TA is available at Aetrix Electronics and suitable for DC-DC converter feedback clamping, RS-485 bus transient suppression, and microcontroller GPIO ESD protection requiring stable component supply across automotive, industrial, and medical electronics programs.
Supply support for FLLD258TA 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, specializing in high-reliability, application-optimized components for power management and signal integrity.
FLLD258TA belongs to Diodes' legacy low-leakage planar diode family, designed specifically for precision analog signal path protection and voltage clamping in harsh-temperature environments.
FAQ
What is the maximum continuous reverse voltage FLLD258TA can withstand?
FLLD258TA has a repetitive peak reverse voltage (VRRM) rating of 100 V. This is the maximum instantaneous reverse voltage the diodes can block continuously without breakdown, verified per JEDEC JESD22-A114 test conditions at Tj = 150°C. Operation above this value risks irreversible avalanche failure.
Is FLLD258TA suitable for high-frequency switching above 1 MHz?
No - its 400 ns reverse recovery time (trr) limits reliable operation to switching frequencies below ~500 kHz. At 1 MHz, stored charge causes excessive reverse conduction and heating. For >1 MHz applications, consider Schottky alternatives like BAS70-04 with trr < 10 ns.
How are the anodes and cathode arranged in the SOT23 package?
Pin 1 and Pin 2 are independent anodes; Pin 3 is the common cathode. The marking "D58" appears adjacent to Pin 1. This configuration allows simultaneous clamping of two positive-going transients to a shared return node, reducing PCB trace inductance versus discrete diodes.
Does FLLD258TA meet automotive AEC-Q101 qualification?
No - FLLD258TA is not AEC-Q101 qualified. It is rated for industrial temperature range (−55°C to +150°C) and used in automotive-adjacent applications, but lacks the stress testing, lot traceability, and failure analysis reporting required for AEC-Q101. For qualified alternatives, consider Diodes' DFLS1100Q.
FLLD258TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 250mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 200 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 400 ns
- Current - Reverse Leakage @ Vr:
- 3 nA @ 50 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
FLLD258TA FAQ
1.How can I place an order for FLLD258TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FLLD258TA 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 FLLD258TA reliable?
The price and inventory of FLLD258TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FLLD258TA is usually 5 days.
3.What payment methods are accepted for FLLD258TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FLLD258TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FLLD258TA?
FLLD258TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FLLD258TA 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 FLLD258TA?
For technical support, including FLLD258TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FLLD258TA requirements.
6.How does Aetrix verify that FLLD258TA is sourced from the original manufacturer or authorized distributors?
All FLLD258TA 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 FLLD258TA meets industry standards.
7.What is the process for return or replacement of FLLD258TA?
All FLLD258TA units undergo pre-shipment inspection (PSI). If there is an issue with FLLD258TA, 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 FLLD258TA part is unused and in its original packaging.
Return procedure for FLLD258TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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