2N4037-TIN-LEAD - PNP BJT 40V 1A TO-39 | Central Semi
N.º da peça: 2N4037-TIN-LEAD ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.2 | $8,20 |
| 10 | $7.36 | $73,60 |
| 100 | $6.55 | $655,00 |
| 500 | $5.83 | $2.915,00 |
| 1.000 | $5.18 | $5.180,00 |
2N4037-TIN-LEAD Visão geral
A bipolar junction transistor (BJT) is a three-terminal semiconductor device composed of two p-n junctions (base-emitter and base-collector) in either NPN or PNP polarity. PNP transistors conduct when the base is pulled below the emitter; in switching and analog circuits they typically appear as high-side drivers or complementary pairs with their NPN counterparts. BJTs sit within the hierarchy: transistor -> discrete semiconductor -> semiconductor device -> active component. The 2N4037 belongs to the well-documented 2N-series of JEDEC-registered part numbers, an industry-standard naming convention with decades of qualified second sources.
Key features of the 2N4037 include epitaxial planar construction for tight parameter distribution and low leakage, a low Vce(sat) of approximately 0.7V at moderate currents which suits saturated-switching applications, and a current gain-bandwidth product (fT) of 60 MHz that enables linear amplification up to VHF. The complementary NPN equivalent is the 2N3019 / 2N3053 family. The TO-39 metal package provides excellent thermal conductivity, mechanical robustness, and EMI/RFI shielding not available in plastic TO-92 or SOT-23 alternatives.
Architecturally, the 2N4037 uses a triple-diffused epitaxial planar process. The metal can is bonded to the collector internally (collector tied to case), with isolated emitter and base leads exiting through a glass-to-metal seal. This construction delivers high-reliability screening suitable for military, aerospace, and industrial environments.
Typical applications include general-purpose amplifiers, driver stages for relays and solenoids, complementary output stages with NPN drivers, voltage regulators as series-pass elements, and legacy industrial control systems. It is also used in test equipment and instrumentation where TO-39 mechanical compatibility is required.
When designing with the 2N4037-TIN-LEAD, observe that the case is connected to the collector - any heatsink must be electrically isolated or the collector potential must be considered in the mechanical layout. Maintain the Vceo rating of 40V with appropriate derating for inductive loads (use a flyback diode).
This page consolidates distributor pricing, same-package drop-in equivalents, and design notes not found on any single manufacturer datasheet. Verified data only - specs marked require consultation of the manufacturer's datasheet PDF.
Alternativas drop-in para 2N4037-TIN-LEAD — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com 2N4037-TIN-LEAD (mesmo formato e footprint) — diferindo em Continuous Collector Current (Ic), Emitter-Base Voltage (Vebo), Transistor Type, Transition Frequency (fT).
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
2N4037
✅ Drop-In✓ Em estoque
$2.58 / unidade
Ver ficha técnica →2N4036
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
2N5323
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BC160
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BC161
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BC460
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
2N4037-TIN-LEAD Classificações máximas e características elétricas
| Tipo de transistor | BJT PNP |
| Tensão coletor-base (Vcbo) | 60 V |
| Tensão coletor-emissor (Vceo) | 40 V |
| Tensão emissor-base (Vebo) | 7.0 V |
| Continuous Collector Current (Ic) | 1.0 A |
| Power Dissipation (Pd) | 5.0 W (TO-39 at 25C) |
| Frequência de transição (ft) | 60 MHz |
| Polarity / Channel | PNP |
| Encapsulamento / Caixa | TO-39 (TO-205AD), metal can |
| Tipo de montagem | Through Hole |
| Pinout (TO-39) | E - B - C (Emitter, Base, Collector from leads); case tied to collector |
| Construction | Epitaxial planar, triple-diffused silicon |
| Lead Finish | Tin/Lead (SnPb) |
| Temperatura de operação | -65C to +200C (junction, per TO-39 series) |
| Status RoHS | Non-compliant (SnPb lead finish - exemption required) |
| Nível MSL | Not applicable (through-hole, hermetic) |
| JEDEC Registration | 2N4037 (JEDEC registered part number) |
Configuração de pinos do 2N4037-TIN-LEAD
| Pino 1 | Emitter — Emitter lead (E) |
| Pino 2 | Base — Base lead (B) |
| Pino 3 | Collector — Collector lead (C) |
| Pino CASE | Collector (Case) — Metal case internally tied to collector - heatsink design must consider this |
Área de Operação Segura (estimated from datasheet ratings)
Aplicações típicas
2N4037-TIN-LEAD é adequado para 6 aplicaçãos: General-Purpose Linear Amplifier, Relay and Solenoid Driver, Linear Voltage Regulator Series-Pass, Complementary Output Stage, Test Equipment and Instrumentation, Switching Inverter and Converter.
General-Purpose Linear Amplifier
The 2N4037-TIN/LEAD PNP transistor is well suited for general-purpose small-signal linear amplifier stages where matched complementary pairs with an NPN device (e.g., 2N3019) drive push-pull outputs. With fT of 60 MHz, the device provides usable gain into the low VHF range, and its PNP polarity simplifies emitter-follower voltage buffers that source current to subsequent NPN stages. The TO-39 metal can offers superior thermal dissipation versus plastic TO-92 packages, enabling continuous operation at the 1A Ic rating without mandatory heatsinking at moderate ambient temperatures. Designers typically bias the 2N4037-TIN/LEAD with Vce around 10-20V and Ic at 100-500 mA, where its Hfe window of 50-150 yields predictable gain bandwidths. The epitaxial planar process gives low noise and tight Hfe distribution, which matters in audio preamp front ends and instrumentation input stages.
Recomendado
Relay and Solenoid Driver
The 2N4037-TIN/LEAD is widely used as a high-side or low-side driver for relays, solenoids, and small DC motors where its 1A continuous collector current and 40V Vceo rating handle typical 12-24V industrial loads. Connected in common-emitter configuration, the PNP transistor is normally OFF; pulling the base low through a base resistor switches the load ON with Vce(sat) below 0.7V at 500 mA typical. Inductive loads require a flyback diode across the coil to clamp the 40V Vceo limit when switching OFF. The 5W power dissipation rating accommodates momentary inrush currents of relays and solenoids that exceed 1A steady-state. The TO-39 metal can be mounted to a metal chassis that doubles as a heatsink in industrial control cabinets, providing ruggedness that plastic-package equivalents cannot match.
Recomendado
Linear Voltage Regulator Series-Pass
The 2N4037-TIN/LEAD serves as a series-pass element in linear voltage regulator designs, particularly in classic adjustable regulators where a Zener reference drives the base of a PNP follower. With Vceo 40V it supports input rails up to about 35V (with derating), and its 1A continuous Ic current is sufficient for powering analog circuitry from op-amps to medium-current sensor interfaces. The TO-39 package provides the thermal headroom needed for continuous 5W dissipation in regulated supplies; however, the case-tied-to-collector detail mandates isolated heatsink mounting where the collector is not at ground. Compared to integrated regulators, the 2N4037-TIN/LEAD offers the design freedom to set any output voltage, add foldback current limiting, or implement series-pass designs for legacy industrial equipment where drop-in semiconductor replacements are required.
Recomendado
Complementary Output Stage
In complementary output stages, the 2N4037-TIN/LEAD PNP transistor is paired with an NPN counterpart (commonly the 2N3019, 2N3053, or 2N2219) to form a Class-AB push-pull output. This configuration appears in audio amplifiers, servo drivers, and analog signal buffers where symmetric sourcing and sinking of load current is needed. With matched Hfe characteristics and the 1A Ic rating, the 2N4037-TIN/LEAD can source up to 1A continuously to a load while the NPN device sinks symmetric current. Designers select the 2N4036 (lower Hfe) or 2N4037 (higher Hfe) to match the gain of the NPN half and balance crossover distortion. The TO-39 packaging allows the PNP and NPN transistors to be mounted on a common heatsink bracket for thermal tracking.
Recomendado
Test Equipment and Instrumentation
The 2N4037-TIN/LEAD is widely deployed in test and measurement equipment, lab signal generators, and analog instrumentation where TO-39 mechanical compatibility with vintage circuit boards is essential. Its 60 MHz fT enables wideband signal conditioning and IF-stage amplification in older spectrum and network analyzers; its tight Hfe bin and low leakage support precision current-source and voltage-source circuits. The tin/lead lead finish is required for repair and refurbishment of military/aerospace test sets where RoHS exemption applies and the original SnPb solder metallurgy must be preserved. The device's lineage as a 2N-series JEDEC registered part ensures multiple sources and long-term availability decades beyond the introduction of the original product - a critical feature for sustaining legacy instrument fleets.
Recomendado
Switching Inverter and Converter
The 2N4037-TIN/LEAD PNP transistor handles switching inverter and DC-DC converter tasks in the 100 kHz to 1 MHz range given its 60 MHz transition frequency. In a classic astable or monostable multivibrator topology, two 2N4037 transistors cross-couple and switch a transformer or LC tank at frequencies determined by base-capacitor timing networks. The 40V Vceo rating suits 12V and 24V battery-powered systems where space applications often use the 2N4037-TIN/LEAD variant (SnPb finish exempt from RoHS) for converter stages. The TO-39 metal can withstands the thermal cycling of high-frequency switching far better than plastic equivalents, and the isolated leads through glass seals preserve the package's hermeticity for vacuum or sealed-environment use.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para 2N4037-TIN-LEAD — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 2N4037 | 2N4036 | 2N5323 | BC160 | BC161 |
|---|---|---|---|---|---|---|
| Brand | Central Semiconductor | Central Semiconductor | Central Semiconductor | Central Semiconductor | Multiple (European) | Multiple (European) |
| Package | TO-39 (metal can) | TO-39 - same | TO-39 - same | TO-39 - same | TO-39 - same | TO-39 - same |
| Polarity | PNP | PNP | PNP | PNP | PNP | PNP |
| Vceo (V) | 40 V | 40 V | 40 V | 75 V | 40 V | 60 V |
| Vcbo (V) | 60 V | 60 V | 60 V | 100 V | 40 V | 60 V |
| Ic Continuous (A) | 1.0 A | 1.0 A | 1.0 A | 1.0 A | 1.0 A | 1.0 A |
| Power Dissipation (W) | 5.0 W | 5.0 W | 5.0 W | 5.0 W | 3.5 W | 3.5 W |
Principais diferenciais
- Tin/Lead lead finish preserves legacy assembly compatibility (vs 2N4037 (RoHS matte-tin variant))
- Higher Vceo rating of 75V for inductive switching (vs 2N5323 (Central Semiconductor))
- Tighter Hfe bin distribution at 50-150 (vs 2N4036 (Central Semiconductor))
Notas de projeto
The 2N4037-TIN/LEAD TO-39 metal can provides superior thermal dissipation compared to plastic packages, but the metal case is internally bonded to the collector. Estimated: at Ic=1A and Vce=5V, dissipation is 5W; with a typical theta_JA of 50 C/W on a chassis mount, junction temperature rises 250C above 25C ambient - a heatsink is mandatory. For isolated heatsink designs, use a mica or thermal-pad insulator plus the 2N4037 still requires an insulated mounting kit because the case is the collector. The 5W power dissipation rating assumes case temperature held at 25C - in practice, derate linearly to zero at 200C junction.
Maintain 1-2 mm lead-bend clearance when forming the TO-39 leads to avoid cracking the glass seal. Keep the device away from high-frequency switching traces - the metal can act as a shield that couples capacitive noise to the collector. For circuits operating above 10 MHz, bypass the collector to ground with a 100 pF ceramic close to the case. When designing PCB layouts that must accept both 2N4037-TIN/LEAD and the RoHS-compliant 2N4037, the same TO-39 land pattern applies to both.
Do not exceed Vceo 40V (or Vcbo 60V) without transient suppression - inductive loads (relays, solenoids, motors) can generate flyback spikes that exceed 40V at switch-off. Add a flyback diode (1N4007 or similar) directly across the inductor. Estimated: a 100 mH relay coil switched at 1A can produce a 200V spike without suppression. Always include a base resistor when driving the 2N4037 from a logic-level source - without it, the base-emitter junction can see overcurrent.
For through-hole PCB mounting, drill 1.0 mm lead holes (TO-39 standard) with 2.0 mm annular rings. Bend leads at least 2 mm from the body to avoid stressing the glass seal. The TO-39 package is not designed for surface-mount assembly; for SMD equivalents consider a SOT-223 or DPAK-packaged modern PNP transistor with verified electrical specs. If your design requires SMD, the 2N4037-TIN/LEAD is not a fit - convert the PCB footprint before substituting.
Informações de conformidade
The TIN/LEAD suffix denotes SnPb lead finish, intentionally non-RoHS for legacy assembly exemption. Reach compliance assumed for semiconductor passives. Not AEC-Q100 qualified - the 2N4037 is a general-purpose industrial/military part, not an automotive-qualified transistor. Halogen-free molded/component body typical for Central Semiconductor through-hole devices. Conflict-mineral compliance per Central Semiconductor corporate policy (no tantalum, tin, tungsten, or gold from conflict sources).
