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onsemi 2SD1828
- Part No.:
- 2SD1828
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
2SD1828.pdf
- Description:
- TRANS NPN DARL 100V 3A TO-220ML
- Quantity:
- Payment:
- Shipping:
Inventory:613
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Product details
Overview
2SD1828 from SANYO is an NPN epitaxial planar silicon Darlington transistor in TO-220ML package, rated for VCEO = –30 V, IC = –3 A, PC = 20 W (TC = 25°C), with DC current gain hFE ≥ 1000 at IC = –1.5 A, used in relay drivers, printer hammer drivers, and voltage regulator control circuits.
For engineers reviewing the 2SD1828 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical ratings, thermal derating curves, switching timing data (ton = 0.8 µs, toff = 5.0 µs), saturation characteristics (VCE(sat) ≤ –1.0 V @ IC = –3 A), and safe operating area (ASO) limits critical for high-current switching design validation.
Technical Context
The 2SD1828 operates as a high-gain NPN Darlington pair with integrated base-emitter resistor network enabling simplified drive requirements. Its structure supports high-current switching at low base drive currents (IB = –3 mA typical for IC = –3 A).
It features wide ASO with pulse-rated collector current up to –5 A (10 ms), thermal resistance RθJC = 1.2°C/W, and guaranteed VBE(sat) ≤ –2.4 V at IC = –3 A, making it suitable for industrial driver stages requiring robust transient handling and stable DC gain across –40°C to +120°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | –30 V - Maximum allowable collector-to-emitter voltage before breakdown under open-base condition; defines safe voltage headroom in relay coil or motor load switching. |
| IC (DC) | –3 A - Continuous collector current rating at TC = 25°C; sets baseline current-handling capability for steady-state driver operation. |
| PC | 20 W - Maximum collector dissipation at case temperature 25°C; requires heatsink sizing per RθJA = 1.6°C/W (no heatsink) or RθJC = 1.2°C/W (with heatsink). |
| hFE | 1000 min @ IC = –1.5 A - High DC current gain enables low base drive current (≈ –1.5 mA) for full output conduction, reducing MCU GPIO loading. |
| ton/toff | 0.8 µs / 5.0 µs - Verified switching times at IC = –1 A, VCC = –50 V; determines minimum PWM frequency support and power loss during transitions. |
| VCE(sat) | ≤ –1.0 V @ IC = –3 A - Low saturation voltage minimizes conduction loss (Psat ≈ 3 W), critical for thermal management in compact driver designs. |
Pinout & Package
SANYO TO-220ML package: insulated metal tab, micaless construction for direct heatsink mounting without insulating washer; 3-pin through-hole configuration with standard lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input terminal | Receives low-current drive signal; internal Darlington base resistor network simplifies external biasing and improves turn-on speed. |
| 2 (Collector) | High-current output node | Connected to load (e.g., relay coil, motor winding); electrically tied to metal tab for thermal conduction and EMI shielding. |
| 3 (Emitter) | Current return path | Common emitter connection; must be referenced to system ground or negative rail; handles full load current with minimal voltage drop. |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE ≥ 1000 at IC = –1.5 A enables microcontroller-level base drive without external amplification. |
| Wide Safe Operating Area (ASO) | Rated for –5 A pulsed (10 ms) at VCE = –10 V, supporting inductive kickback energy absorption in relay/motor switching. |
| Micaless TO-220ML package | Eliminates need for insulating washers during heatsink mounting, reducing thermal interface resistance by ~0.3°C/W vs. standard TO-220. |
| Low VCE(sat) | ≤ –1.0 V at IC = –3 A reduces conduction losses to <3 W, allowing higher duty-cycle operation without forced air cooling. |
Applications
| Relay Driver Stage | Printer Hammer Actuator |
|---|---|
|
Use Scenario: Driving 24 V/500 mA electromagnetic relays in PLC I/O modules with TTL-compatible control signals. IC Role / Device Role / Timing Role: High-current switch providing galvanic isolation between logic-level controller and inductive load. Use Value: VCE(sat) ≤ –1.0 V ensures <0.5 W conduction loss per channel, enabling 8-channel density on single-layer PCB without thermal throttling. |
Use Scenario: Energizing solenoid-based print hammers in dot-matrix printers requiring 100 ms pulses at 1.2 A peak. IC Role / Device Role / Timing Role: Fast-switching Darlington delivering precise pulse-width-controlled mechanical impact force. Use Value: ton/toff of 0.8 µs/5.0 µs supports 10 kHz PWM modulation for variable hammer velocity control. |
| Voltage Regulator Control | Industrial Motor Starter |
|
Use Scenario: Base drive for series pass transistors in linear voltage regulators supplying ±15 V analog circuitry. IC Role / Device Role / Timing Role: Precision current amplifier stabilizing output voltage via feedback loop compensation. Use Value: hFE ≥ 1000 ensures regulation accuracy within ±0.5% over load current 0–2 A due to minimal base current error contribution. |
Use Scenario: Controlling 24 V DC motors in automated gate systems with intermittent 3 A stall current demands. IC Role / Device Role / Timing Role: Robust power switch handling repeated inrush currents and back-EMF transients. Use Value: ASO curve supports 3 A continuous + 5 A surge (10 ms), eliminating need for parallel devices in Class 2 motor control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SD1762 | VCEO = –60 V, IC = –3 A, hFE = 500–2000, TO-220 package with insulated tab | Higher voltage rating suits 48 V industrial bus applications but exhibits 2× higher VCE(sat) (–1.8 V) at same current | Select 2SD1762 only when >–40 V blocking is required; otherwise 2SD1828 offers superior efficiency in 24 V systems. |
| BD679A | VCEO = –80 V, IC = –4 A, hFE = 750 min, TO-126 package (smaller footprint, lower PC = 15 W) | Limited thermal capacity (RθJC = 3.0°C/W) restricts continuous use above 1.5 A without aggressive heatsinking | Choose BD679A for space-constrained designs where peak current <2 A and board-level thermal management is feasible. |
Compared with 2SD1762 and BD679A, the 2SD1828 delivers optimal balance of low saturation loss, wide ASO, and TO-220ML thermal performance for 24 V industrial drivers-making it preferred for relay, solenoid, and linear regulator control where efficiency and reliability are prioritized over ultra-high voltage margin or miniaturization.
Availability
2SD1828 is available at Aetrix Electronics and suitable for relay drivers, printer hammer actuators, and voltage regulator control circuits requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing from original manufacturer channels.
Supply support for 2SD1828 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
SANYO Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in power discrete devices, analog ICs, and optoelectronics before its acquisition by Panasonic in 2012; known for rugged, thermally optimized transistor designs.
The 2SD1828 belongs to SANYO's ENN2212B-series high-gain Darlington transistors engineered specifically for industrial driver applications demanding high current gain, wide safe operating area, and direct-mount thermal performance.
FAQ
What is the maximum continuous collector current rating for the 2SD1828?
The 2SD1828 has a maximum continuous collector current IC of –3 A at case temperature TC = 25°C. Derating is required above 25°C per the PC–TC curve: at TC = 100°C, maximum IC drops to approximately –1.8 A. This rating assumes proper heatsinking using the TO-220ML metal tab.
Does the 2SD1828 require an external base resistor when driven by a microcontroller?
No, the 2SD1828 integrates internal base resistors optimized for Darlington operation, allowing direct connection to 3.3 V or 5 V GPIO outputs. At IC = –3 A, typical base current is –3 mA-well within standard MCU pin drive capability-eliminating need for external base bias components in most applications.
What is the safe operating area (ASO) limit for the 2SD1828 during pulsed operation?
The 2SD1828 supports pulsed collector currents up to –5 A for durations of 1–100 ms, as confirmed by the ASO graph in the datasheet (ITR09324/ITR09325). At VCE = –10 V and 10 ms pulse width, the device remains within SOA limits without secondary breakdown risk, making it suitable for relay and solenoid driving.
How does the 2SD1828 compare to the 2SB1226 listed in the same datasheet?
The 2SD1828 is the NPN complement to the PNP 2SB1226; both share identical TO-220ML packaging, thermal specs, and ASO curves, but differ in polarity, voltage polarity conventions, and gain profiles. The 2SD1828 exhibits hFE ≥ 1000 at IC = –1.5 A, while 2SB1226 specifies hFE ≥ 1000 at IC = +1.5 A-enabling complementary push-pull driver designs.
Is the metal tab of the 2SD1828 electrically isolated from the collector terminal?
Yes-the TO-220ML package used for the 2SD1828 features a micaless insulated metal tab that is internally isolated from the collector terminal. This allows direct mounting to grounded heatsinks without requiring additional insulating hardware, reducing thermal resistance by ~0.3°C/W compared to standard TO-220 variants.
2SD1828 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.5V @ 3mA, 1.5A
- Current - Collector Cutoff (Max):
- 100µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- 2 W
- Frequency - Transition:
- 20MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220ML
2SD1828 FAQ
1.How can I place an order for 2SD1828 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SD1828 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 2SD1828 reliable?
The price and inventory of 2SD1828 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD1828 is usually 5 days.
3.What payment methods are accepted for 2SD1828?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1828 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SD1828?
2SD1828 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SD1828 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 2SD1828?
For technical support, including 2SD1828 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1828 requirements.
6.How does Aetrix verify that 2SD1828 is sourced from the original manufacturer or authorized distributors?
All 2SD1828 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 2SD1828 meets industry standards.
7.What is the process for return or replacement of 2SD1828?
All 2SD1828 units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1828, 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 2SD1828 part is unused and in its original packaging.
Return procedure for 2SD1828:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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